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Journal articles on the topic 'Acoustic resonator'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Mansor, Muhammad Hatifi, Mohd Shahrir Mohd Sani, Mohd Firdaus Hassan, and Ellyawan Setyo Arbintarso. "Experimental Study: Effect of Resonator Parameter Upon the End Correction for Quarter Wavelength Resonator Tube." Journal of Advanced Research in Applied Sciences and Engineering Technology 64, no. 1 (2025): 152–63. https://doi.org/10.37934/araset.64.1.152163.

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Acoustic resonators are fundamental in various engineering applications, from musical instruments to advanced sound filtering systems. Their ability to amplify and sustain specific frequencies has made them indispensable in modern technology. This study presents a comprehensive parametric investigation of acoustic resonators, aiming to identify the effect of parameter changes on the acoustical length and standing wave that significantly influence their performance and efficiency of acoustic energy harvesting design. The research methodology involves experimental analysis to explore the effects

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2

Lin, Binghui, Yupeng Zheng, Haiyang Li, et al. "Enhancement of Quality Factors in a 6.5 GHz Resonator Using Mo/SiC Composite Microstructures." Micromachines 16, no. 5 (2025): 529. https://doi.org/10.3390/mi16050529.

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This study addresses the critical challenge of lateral acoustic wave energy leakage in high-frequency film bulk acoustic resonators (FBARs) and elucidates the reflection mechanism of acoustic waves at acoustic reflection boundaries. Based on the theory of acoustic impedance mismatch, a novel Mo/SiC composite microstructure is designed to strategically establish multiple acoustic reflection boundaries along the lateral acoustic wave leakage paths. Finite element simulations reveal that SiC microstructures effectively suppress vibration amplitudes in non-resonant regions, thereby preventing acou

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3

Lv, Chenghao, Xiaoming Wang, and Yulin Mei. "Optimization Method of Acoustic Filter Structures Composed of Helmholtz Resonators Based on Genetic Algorithm." Journal of Physics: Conference Series 2468, no. 1 (2023): 012019. http://dx.doi.org/10.1088/1742-6596/2468/1/012019.

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Abstract This paper constructs an iteration method based on Genetic Algorithm to optimize the acoustic filter structure comprising Helmholtz resonators, providing a new approach to optimize the low-frequency filtering performance of the acoustic structure under the constraint of keeping the resonator volume unchanged. First, acoustic-electrical analogy is used to design a fifth-order Chebyshev type II acoustic filter structure, which comprises two rectangular Helmholtz resonators; second, an iteration method is constructed based on Genetic Algorithm to optimize the shape of Helmholtz resonator

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4

Mohd Sani, Mohd Shahrir. "Impact of Varying the Length of Acoustic Resonator on Standing Waves in Acoustic Energy Harvesting." Journal of Mechanical Engineering 22, no. 2 (2025): 31–46. https://doi.org/10.24191/jmeche.v22i2.2971.

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The study takes a unique approach by investigating how the generation and amplitude of standing waves within an acoustic resonator are affected by length changes. Using a finite element model, this study simulated standing waves inside resonators of varying lengths. The standing waves inside acoustic resonators that could be lowered from 100 cm to 20 cm with a 10 cm decrease were assessed. The results indicate that the generation and amplitudes of the low-frequency standing wave mode are directly influenced by the length of an acoustic resonator. The standing waves decreased, and the frequency

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5

Griffin, Steve, Steven A. Lane, and Steve Huybrechts. "Coupled Helmholtz Resonators for Acoustic Attenuation." Journal of Vibration and Acoustics 123, no. 1 (2000): 11–17. http://dx.doi.org/10.1115/1.1320812.

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Helmholtz resonators are used in a variety of applications to reduce the transmission of unwanted sound. This work demonstrates that mechanically coupled resonators can be used to design a particular transmission loss response, provide a wider bandwidth of attenuation, and adapt the transmission loss characteristics of a structure to attenuate disturbances of varying frequency. An analytical model is developed for a single, coupled resonator system mounted on a one-dimensional duct. Experiments are conducted on a similar system that uses a thin membrane to couple the resonator volumes. A simpl

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6

Knöfel, Björn, Paula van Brummelen, Tobias Behrens, and Hartmut Schirmer. "Does the wall sound different? Variable acoustics in rehearsal rooms using small resonator structures in an acoustic panel." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 263, no. 5 (2021): 1867–78. http://dx.doi.org/10.3397/in-2021-1972.

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As the name already states, multipurpose rooms are often used from various people for different intentions like meetings or musical practicing. One example are musical rehearsal rooms, where the acoustic specifications have to meet the requirements of musicians playing different instrument groups. To meet the desire for variable acoustics in a rehearsal room, musicians often like to adjust the room to there personal preferences, what is mostly done by adjusting the frequency dependent room decay curve (T60). Hence, a variable acoustic panel has been developed which consists of several small ad

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7

Wang, Xiao-Peng, Hui Sun, Tian-Ning Chen, and Xing-Guo Wang. "Acoustic wave confinement in two-dimensional phononic crystal with multiple nested resonators." Modern Physics Letters B 33, no. 36 (2019): 1950450. http://dx.doi.org/10.1142/s0217984919504505.

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In this research, a novel phononic crystal (PC) is investigated theoretically to enhance acoustic pressure confinement. It consists of multiple nested resonators based on a tapered configuration. Nested phononic crystal resonator (NPCR) can enhance the acoustic pressure amplification at resonant cavity to a great degree better than the traditional one with same dimensions. The resonant frequency of NPCR is mainly located within outermost phononic crystal resonator’s (PCR) band gap. Meanwhile, it does not move significantly to high frequency with the addition of inner tapered resonators. The en

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8

Teplykh, Andrey, Boris Zaitsev, Alexander Semyonov, and Irina Borodina. "The Study of the Acoustic Characteristics of Chitosan Acetate Film Using a Radial Electric Field Excited Resonator." Sensors 23, no. 4 (2023): 1808. http://dx.doi.org/10.3390/s23041808.

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Currently, the lateral electric field excited resonators are used for the creation of various sensors. We have recently proposed a new type of acoustic resonator called radial electric field excited disk acoustic resonator. The advantage of this type of resonator is its high sensitivity to mechanical and electrical boundary conditions on its free surface. This makes it possible to determine both the acoustic and electrical properties of a thin layer of material deposited on the free end of the resonator. In this work, we used a radial electric field excited disk acoustic resonator of Russian-m

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9

Igoshin, Vladimir, Anastasia Nikitina, Mariia Tsimokha, Ivan Toftul, Mihail Petrov, and Kristina Frizyuk. "High-Q states in acoustic apple-shaped resonators." Journal of Physics: Conference Series 2015, no. 1 (2021): 012040. http://dx.doi.org/10.1088/1742-6596/2015/1/012040.

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Abstract Apples play a significant role in our culture in various points of human history: starting from Adam and Eve, going on with Judgement of Paris, it also touches such great minds as Sir Isaac Newton and Alan Turing. Beyond that apples are still extremely relevant today due to Steve Jobs. In this work we study high quality (high-Q) resonant states of apple-shaped resonators. We have found that quasi bound states in continuum (quasi-BICs) are possible in the linear acoustic domain. We show that quasi-BICs are of Friedrich-Wintgen type, i.e. accompanied with avoided crossings while elongat

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10

O’Connor, Nathaniel, Jacob Adams, Matthew Jones, and John Brisson. "Numerical modeling and design of the acoustic expander for cryogenic refrigeration." IOP Conference Series: Materials Science and Engineering 1327, no. 1 (2025): 012080. https://doi.org/10.1088/1757-899x/1327/1/012080.

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Abstract Cryogenic refrigerators can be broadly classified as either continuous flow machines or oscillating flow machines. The acoustic expander is a new hybrid approach that combines the best aspects of these two machines. Globally, the working fluid moves continuously through the recuperative heat exchanger of the cycle while locally the working fluid oscillates in the acoustic expander. This concept has been demonstrated experimentally through the use of reed-valves coupled to an acoustic resonator. This work develops a high-fidelity numerical model that captures non-linear acoustic effect

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11

Šoltés, Martin, and Milan Červenka. "ELECTRODYNAMIC LOUDSPEAKER-DRIVEN ACOUSTIC COMPRESSOR." Acta Polytechnica 55, no. 5 (2015): 342–46. http://dx.doi.org/10.14311/ap.2015.55.0342.

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<p>An acoustic compressor is built using the acoustic resonator which shape was optimized for a maximum acoustic pressure amplitude and a low-cost compression driver. Acoustic compressor is built by installing a suction port in the resonator wall where the standing wave has its pressure node and a delivery port with a valve in the resonator wall where the standing wave has its pressure anti-node. Different reeds, serving as delivery valves, are tested and their performance is investigated. It was shown that the performance of such simple compressor is comparable, or better, than the acou

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12

Li, De Yu, and Li Jian Ou. "Sound Transmission Control of a Cylindrical Structure Using Acoustic Resonators." Applied Mechanics and Materials 226-228 (November 2012): 203–9. http://dx.doi.org/10.4028/www.scientific.net/amm.226-228.203.

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This paper presents a passive method to control low-frequency noise in a cylindrical structure by using multi-modal T-shaped acoustic resonators. The feasibility of noise transmission control on the cylindrical structure is investigated, including a detailed experimental evaluation of the control performance using a single resonator and a resonator array consisted of different resonators. Finally, six long T-shaped acoustic resonators are used to target the first four lowest cylindrical cavity resonances, and up to 9 dB noise reduction is achieved, and broadband improvement of noise reduction

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13

Lee, Sung Ho, Bong Su Kang, Gyu Man Kim, Yong Rae Roh, and Moon Kyu Kwak. "Fabrication and Performance Evaluation of the Helmholtz Resonator Inspired Acoustic Absorber Using Various Materials." Micromachines 11, no. 11 (2020): 983. http://dx.doi.org/10.3390/mi11110983.

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A soundwave is transmitted by adjacent molecules in the medium, and depending on the type of sound, it exhibits various characteristics such as frequency, sound pressure, etc. If the acoustic wavelength of the soundwave is sufficiently long compared with the size of an acoustic element, physical analysis within the sound element could be simplified regardless of the shape of the acoustic element: this is called “long wavelength approximation”. A Helmholtz resonator, a representative acoustic element which satisfies the “long wavelength theory”, consists of a neck part and a cavity part. The He

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14

Jeon, Jonghoon, Kyunglae Gu, Gyu Young Yi, and Junhong Park. "A Comprehensive Study of Broadband Absorption Performance and Scattering Coefficient Evaluation of Spiral Resonators with Soundproof Sidewalls." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 268, no. 4 (2023): 4349–52. http://dx.doi.org/10.3397/in_2023_0620.

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Resonators designed in spiral and helical shapes exhibit sound absorption performance in the lower frequency band. The absorption characteristics including frequency range and acoustical impedance can be controlled by adjusting the permittivity and permeability are dependent on the length or dimensions of the resonator. As the helical structure is added, the absorption performance can deteriorate due to the change in the resonator geometry. The compliant wall trembles in response to changes in waveguide pressure, generating dissipation of sound energy. The resonator is surrounded by a complian

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15

Goates, Caleb B., Mathew F. Calton, Scott D. Sommerfeldt, and David C. Copley. "Modeling acoustic resonators using higher-order equivalent circuits." Noise Control Engineering Journal 67, no. 6 (2019): 456–66. http://dx.doi.org/10.3397/1/376742.

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Helmholtz resonators are widely used, but classical models for the resonators, such as the lumped-element equivalent circuit, are inaccurate for most geometries. This article presents higher-order equivalent circuits for describing the resonators based on the one-dimensional wave equation. Impedance expressions are also derived. These circuits and expressions are given for various constituent resonator components, which may be combined to model resonators with curved, tapered, and straight necks. Resonance frequency predictions using this theory are demonstrated on two realistic resonators. Th

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16

Li, J., J. Shan, Z. Guo, and A. Levtsev. "Research of Acoustically Improved Helmholtz Resonator." Bulletin of Science and Practice 7, no. 1 (2021): 270–78. http://dx.doi.org/10.33619/2414-2948/62/27.

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The three-dimensional acoustic finite element method is used to predict the transmission loss of the Helmholtz resonance muffler. The results are in good agreement with the experimental results, indicating the applicability and accuracy of the numerical method used in this paper. On the one hand, in order to reduce the resonance frequency without changing the shape of the resonator, the connecting tube is extended to the inside of the resonator, and the influence of the extension length and the cross section shape of the extension tube on the acoustic characteristics of the resonator is discus

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17

Han, Yuan, Yongqiu Zheng, Nan Li, et al. "Acoustic Sensing Performance Investigation Based on Grooves Etched in the Ring Resonators." Micromachines 14, no. 3 (2023): 512. http://dx.doi.org/10.3390/mi14030512.

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Acoustic detection based on optical technology has moved in the direction of high sensitivity and resolution. In this study, an optical waveguide acoustic sensor based on a ring resonator with the evanescent field is proposed. Grooves are introduced into the ring resonators as a direct sensitive structure to excite the evanescent field. A series of resonators with diverse grooves are fabricated for a comparative analysis of acoustic performance. The acoustic parameters of bandwidth, sensitivity, and signal-to-noise ratio (SNR) vary with different grooves indicated by the Q-factor. The results

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18

Deriy, Ilya, Ivan Toftul, Mihail Petrov, and Andrey Bogdanov. "Elastic Trapped Modes in Solid Acoustic Resonators of Various Shapes." Journal of Physics: Conference Series 2015, no. 1 (2021): 012032. http://dx.doi.org/10.1088/1742-6596/2015/1/012032.

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Abstract Resonators are one of the main building blocks of many acoustic, photonic, and microwave devices such as metasurfaces, sensing devices, antennas, and many more. One of the main properties of any resonator, which also determines the properties of the structure, based on the resonator, is the quality (Q) factor. Q-factor of the resonator is limited due to material and radiative losses. In this paper, we propose the existence of modes of solid resonators, immersed in a nonviscious fluid, which are non-radiative, and therefore, their Q-factor is limited only by material losses.

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19

Fesina, Mikhail, Igor Deryabin, and Gorina Larisa. "ON THE POROUS SOUND-ABSORBING PANELS WITH THE END LOW-FREQUENCY RESONANT CAVITIES." Akustika 32 (March 1, 2019): 10–16. http://dx.doi.org/10.36336/akustika20193210.

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Technical rooms of the construction units with noise generating technical objects inside require the use acoustic boards. To provide more effective dissipation of low-frequency sound energy, the acoustic boards made of porous sound-absorbing structures are used; and volume structural composition of these boards can contain hollow resonator elements. They can be represented as Helmholtz acoustic resonator (RIII), half wave (RII), and quarter wave (RI) acoustic resonators. Their distinctive feature is that their chamber, tube and throat parts can be made of non-air-blown sound transparent elasti

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20

Gautam, Abhishek, Alper Celik, and Mahdi Azarpeyvand. "Low-Frequency-Noise Attenuation through Extended-Neck Double-Degree-of-Freedom Helmholtz Resonators." Acoustics 5, no. 4 (2023): 1123–35. http://dx.doi.org/10.3390/acoustics5040063.

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The use of acoustic liners, based on double-degree-of-freedom Helmholtz resonators, for low-frequency-noise attenuation is limited by the volume of individual resonating cavities. This study investigates the effect of the septum neck length on the acoustic performance of double-degree-of-freedom resonators, both experimentally and numerically, for varying cavity volume ratios. The underlying sound attenuation mechanism is studied by analysing the acoustic pressure fields within the resonator cavities. An increase in the septum neck is shown to lower the frequencies affected by the resonator. I

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21

Perelomova, Anna. "Acoustic heating produced in resonators filled by a newtonian fluid." Canadian Journal of Physics 90, no. 7 (2012): 693–99. http://dx.doi.org/10.1139/p2012-071.

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Acoustic heating in resonators is studied. The governing equation of acoustic heating is derived by means of the special linear combination of conservation equations in differential form, allowing the reduction of all acoustic terms in the linear part of the final equation, but preserving terms belonging to the thermal mode responsible for heating. This equation is instantaneous and includes nonlinear acoustic terms that form a source of acoustic heating, it is valid for weakly nonlinear flows with weak attenuation. In general, dynamics of sound in a resonator is described by coupling nonlinea

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22

Yap, Jin Teck, Noor Zafirah Abu Bakar, Nur Fadzilah Shaikh Dawood, and Muhammad Adam Rosli. "Design Improvements of Acoustic Response of an Automotive Air Intake System." MATEC Web of Conferences 335 (2021): 03017. http://dx.doi.org/10.1051/matecconf/202133503017.

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This study aims to improve the acoustic response of an automotive air intake system (AIS) using harmonics acoustics analysis system. Noise pollution imposes adverse health effects on human beings. One of the sources of noise pollution comes from the transportation sector. Combustion engines produce noise through the act of combustion during operation. Noise generated by the AIS affects the comfort and long-term health of humans during operations. The noise produced by the AIS can be reduced through the introduction to resonators. A baseline result was modelled through creating an internal cavi

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23

Chen, Hui, Hangbing Xiao, Yuxin Zhang, and Quan Yuan. "Design and optimization of high-Q TPoS resonators with novel one-dimensional phononic crystals." Journal of Physics: Conference Series 2982, no. 1 (2025): 012035. https://doi.org/10.1088/1742-6596/2982/1/012035.

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Abstract In this paper, a novel star chart-shaped one-dimensional phononic crystal (1D-PNC) is proposed and integrated with the supporting beams of a Lamb wave mode piezoelectric resonator to prevent acoustic waves from leaking through the beams into the substrate, thereby enhancing the device’s quality factor (Q). Firstly, based on finite element analysis and Bloch’s theorem, we obtained a phononic crystal with an acoustic bandgap in the range of 10.0 MHz to 13.31 MHz. Secondly, the performance of the resonator integrated with the 1D-PNC was compared with that of traditional resonators and re

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24

Torrent, Daniel, Marc Martí Sabaté, Junfei Li, Steven Cummer, and Bahram Djafari-Rouhani. "Bound states in the continuum in clusters of acoustic and elastic resonators." Journal of the Acoustical Society of America 155, no. 3_Supplement (2024): A32. http://dx.doi.org/10.1121/10.0026684.

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This study investigates the localization of waves within highly symmetric clusters of scatterers, focusing on the resonances that emerge when resonators are strategically positioned along the perimeter of a circumference. Notably, the quality factor of these resonances exhibits a noteworthy enhancement with an increasing number of resonators. We demonstrate that, specifically for flexural waves, as the number of scatterers approaches infinity, a defining condition emerges for the formation of bound states in the continuum (BICs). Additionally, we present an analytical expression for the design

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25

Lv, Hongrui, Xianglong Shi, Yujie Ai, et al. "Bulk GaN-based SAW resonators with high quality factors for wireless temperature sensor." Journal of Semiconductors 43, no. 11 (2022): 114101. http://dx.doi.org/10.1088/1674-4926/43/11/114101.

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Abstract Surface acoustic wave (SAW) resonator with outstanding quality factors of 4829/6775 at the resonant/anti-resonant frequencies has been demonstrated on C-doped semi-insulating bulk GaN. The impact of device parameters including aspect ratio of length to width of resonators, number of interdigital transducers, and acoustic propagation direction on resonator performance have been studied. For the first time, we demonstrate wireless temperature sensing from 21.6 to 120 °C with a stable temperature coefficient of frequency of –24.3 ppm/°C on bulk GaN-based SAW resonators.

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26

CADETE, Kael, and José DOS SANTOS. "Noise control in ducts using Herschel-Quincke acoustic metamaterial array." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 270, no. 9 (2024): 2868–77. http://dx.doi.org/10.3397/in_2024_3244.

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Acoustic resonators, like Helmholtz, side branch tubes, expansion chambers, Herschel-Quincke, and so on, are usually used to control duct noise in acoustic systems. Noise attenuation in local resonators occurs due to impedance mismatch of incident, transmitted, and reflected waves induced by the addition of resonators. The frequency band and the attenuation level generated by the resonator depend on its geometry and behave as a narrow-band filter. However, a much larger frequency band, called bandgap, is obtained if they are appropriately distributed (periodically or not) along the duct length

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27

Ramírez, David, Sergio Castiñeira-Ibáñez, Jose Maria Bravo-Plana-Sala, Juan Vicente Sánchez-Pérez, and Rubén Picó. "Analysis of the interaction of helmholtz resonators in periodic acoustic metamaterials depending on its orientation with the acoustic source." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 263, no. 6 (2021): 215–26. http://dx.doi.org/10.3397/in-2021-1369.

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Acoustic screens based on sonic crystals constitute one of the most promising technological bets of recent years in the field of environmental acoustics. Sonic crystals are defined as new materials formed by arrays of acoustic scatterers embedded in air. The design of these screens is made using powerful simulation models that provide reliable results without the need of expensive experimental testing. This project applies the finite elements method in order to analise an acoustic barrier that includes (Helmholtz) resonators in its scatterers, and studies the interference of the sonic crystal

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28

Sun, Xianming, Tao Yu, Lipeng Wang, Yunshu Lu, and Changzheng Chen. "Embedded Rough-Neck Helmholtz Resonator Low-Frequency Acoustic Attenuator." Crystals 15, no. 1 (2024): 12. https://doi.org/10.3390/cryst15010012.

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In various practical noise control scenarios, such as duct noise mitigation, industrial machinery, architectural acoustics, and underwater applications, it is essential to develop noise absorbers that deliver effective low-frequency attenuation while maintaining compact dimensions. To achieve low-frequency absorption within a limited spatial volume, this study proposes an embedded Helmholtz resonator featuring a roughened neck and establishes a numerical computational model that incorporates thermos viscous effects. A quantitative investigation is conducted on three types of embedded rough-nec

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29

Lv, Lu, Yao Shuai, Shitian Huang, et al. "Area Dependence of Effective Electromechanical Coupling Coefficient Induced by On-Chip Inductance in LiNbO3-Based BAW Resonators." Electronics 11, no. 23 (2022): 4032. http://dx.doi.org/10.3390/electronics11234032.

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To solve the problem of filter bandwidth in 5G communication, it is urgent to develop an acoustic resonator with a large effective electromechanical coupling coefficient (Keff2). In this paper, the dependence between the resonance area and the performance of the bulk acoustic wave (BAW) resonator is studied. The solidly mounted resonators (SMRs) based on 43° Y cut lithium niobate (LN) were fabricated by the wafer transfer technique. The on-chip inductor was integrated with the BAW resonator through a pad electrode. Resonators with different resonant areas were fabricated and tested. Finite ele

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Robertson, William M., Robert Carlyon, and Kyle Sprague. "Waveguide demultiplexer based on Helmholtz-resonator mediated extraordinary acoustic transmission." Journal of the Acoustical Society of America 152, no. 4 (2022): A228. http://dx.doi.org/10.1121/10.0016100.

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The design of an acoustic demultiplexer based on in-line Helmholtz resonators is demonstrated analytically via a modified transfer matrix method and computationally through finite element simulations. The modeled system consists of a single input waveguide that splits in a Y-configuration into two output waveguides. Each output arm has a single tuned Helmholtz resonator embedded in-line along the length of the guide. The Helmholtz resonators in each arm consist of a single cavity with two necks—one directed towards the input and output sides of the guide. The phenomenon of extraordinary acoust

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31

Laly, Zacharie, Christopher Mechefske, Sebastian Ghinet, Behnam Ashrafi, and Charly T. Kone. "Analysis of Helmholtz resonator wall elasticity effects on the performance of periodic acoustic metamaterial." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 268, no. 2 (2023): 6356–67. http://dx.doi.org/10.3397/in_2023_0937.

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In this paper, a metamaterial made of a porous layer with embedded periodic Helmholtz resonators is studied and the effects of the resonator wall elasticity on the acoustic attenuation performance of the metamaterial are investigated numerically. The analytical transmission loss results using the parallel transfer matrix method show good agreement with finite element results for the rigid wall case. Elastic materials with different thicknesses are considered for the wall of the neck and the top, lateral and bottom walls of the resonator cavity. It is shown that the transmission loss of the met

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32

Mohamad Ashari, Zainab, Fatini Sidek, and Anis Nurashikin Nordin. "TEMPERATURE CONTROL CIRCUIT FOR SURFACE ACOUSTIC WAVE (SAW) RESONATORS." IIUM Engineering Journal 12, no. 2 (2011): 99–110. http://dx.doi.org/10.31436/iiumej.v12i2.47.

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Surface Acoustic Wave (SAW) resonators are key components in oscillators, frequency synthesizers and transceivers. One of the drawbacks of SAW resonators are that its piezoelectric substrates are highly sensitive to ambient temperature resulting in performance degradation. This work propose a simple circuit design which stabalizes the temperature of the SAW resonator, making it independet of temperature change. This circuit is based on the oven control method which elevates the temperature of the resonator to a high temperature, making it tolerant to minor changes in ambient temperature.This c

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33

Afework, Milkyas B., and James M. Manimala. "Exploring mechanical assonance for impact energy harvesting using acoustic metamaterials." Journal of Intelligent Material Systems and Structures 33, no. 9 (2021): 1126–46. http://dx.doi.org/10.1177/1045389x211048225.

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Acoustic metamaterials are engineered to possess unique dynamic properties that are not commonly found in nature. It has been demonstrated that customizing the characteristics of their local features can help optimize their dynamic performance under specific loading conditions. Drawing inspiration from the literary device called “assonance,” the term “mechanical assonance” may be ascribed to the dynamic phenomenon realized by sequencing oscillators with tuned responses within a waveguide to engineer a prescribed wave transformation across it. In this context, assonance provides a framework to

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Wang, Jianguo, Philip Rubini, Qin Qin, and Brian Houston. "A Model to Predict Acoustic Resonant Frequencies of Distributed Helmholtz Resonators on Gas Turbine Engines." Applied Sciences 9, no. 7 (2019): 1419. http://dx.doi.org/10.3390/app9071419.

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Helmholtz resonators, traditionally designed as a narrow neck backed by a cavity, are widely applied to attenuate combustion instabilities in gas turbine engines. The use of multiple small holes with an equivalent open area to that of a single neck has been found to be able to significantly improve the noise damping bandwidth. This type of resonator is often referred to as “distributed Helmholtz resonator”. When multiple holes are employed, interactions between acoustic radiations from neighboring holes changes the resonance frequency of the resonator. In this work, the resonance frequencies f

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35

Aurégan, Yves. "Experimental investigation of an Autler-Townes resonator with flow." Acta Acustica 8 (2024): 10. http://dx.doi.org/10.1051/aacus/2023065.

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The acoustic behavior of a double annular resonator with flow is studied as a special case to illustrate the possibilities, but also the difficulties, offered by flow on the acoustic performance of metamaterials. Compared with the associated single resonator, the double resonator exhibits – in the lossless case – a transmission peak near the resonant frequency. This peak is associated with an evanescent out-of-phase coupling between the two resonators and is known in literature as “Autler-Townes splitting”. In measurements with a double resonator, this peak is strongly attenuated by viscous ef

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Zaman, Thasin Mohammad, Md Rejvi Kaysir, Shazzad Rassel, and Dayan Ban. "The Optimization of a T-Cell Resonator: Towards Highly Sensitive Photoacoustic Spectroscopy for Noninvasive Blood Glucose Detection." Biosensors 15, no. 4 (2025): 254. https://doi.org/10.3390/bios15040254.

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Noninvasive blood glucose monitoring is crucial for diabetes management, and photoacoustic spectroscopy (PAS) offers a promising solution by detecting glucose levels through human skin. However, weak acoustic signals in PAS systems require optimized resonator designs for enhanced detection sensitivity. Designing such resonators physically is complex, requiring the precise identification of critical parameters before practical implementation. This study focused on optimizing a T-shaped photoacoustic resonator using finite element modeling in a COMSOL Multiphysics environment. By systematically

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Yuan, Guangzheng, Jiamin Rong, Dewei Zhang, et al. "Underwater Low-Frequency Acoustic Wave Detection Based on a High-Q CaF2 Resonator." Machines 12, no. 4 (2024): 234. http://dx.doi.org/10.3390/machines12040234.

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Whispering gallery mode (WGM) resonators with an ultra-high quality (Q) factor provide a new idea for high-precision underwater acoustic sensing. However, acoustic energy loss due to watertight encapsulation has become an urgent problem for its underwater application. In order to solve this problem, this paper proposes a hollowed-out array structure. The finite element simulation shows that the acoustic wave transmission loss is improved by 30 dB compared with that of the flat plate encapsulation structure. Using a calcium fluoride (CaF2) resonator with a Q factor of 1.2 × 108 as an acoustic s

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Peters, Brady, Nicholas Hoban, John Nguyen, and Nermine Hassanin. "Robotic fabrication of clay acoustic resonators." Journal of the Acoustical Society of America 155, no. 3_Supplement (2024): A321. http://dx.doi.org/10.1121/10.0027668.

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Digital fabrication offers the potential for the creation of complex geometries and mass-customized products; however, most 3D printers do not scale sufficiently to create architectural scale components. Robotic fabrication methods may bridge the gap, offering the possibility of architectural-scale 3d-printing capabilities. It has been found that the combination of multiple Helmholtz resonators tuned to different frequencies can create broadband absorption. This research pairs CAD parametric design with robotic clay extrusion as a method of acoustic resonator mass customization. The history of

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Tilmans, Hendrikus A. C., and Wanling Pan. "Acoustic resonator." Journal of the Acoustical Society of America 124, no. 5 (2008): 2667. http://dx.doi.org/10.1121/1.3020538.

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Guo, Hui, Yansong Wang, Xiaolan Wang, and Chi Xu. "Investigation on acoustic energy harvesting based on quarter-wavelength resonator phononic crystals." Advances in Mechanical Engineering 10, no. 1 (2018): 168781401774807. http://dx.doi.org/10.1177/1687814017748077.

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This article presents the development of an acoustic energy harvester using a quarter-wavelength resonator phononic crystals together with piezoelectric vibrators. The quarter-wavelength resonator phononic crystals consist of a main wave duct, several quarter-wavelength resonators, and equivalent piezoelectric vibrators. The acoustic energy is converted to mechanical energy when the sound incident in the quarter-wavelength resonator generates an oscillatory pressure as of localization efficiency, which in turns causes piezoelectric vibrators vibrating. Transfer matrix method is used to provide

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Kopytko, Yuliia, Vitaliy Zaets, Sergey Naida, Vitaliy Didkovskyi, and Anastasiia Damarad. "RESEARCH OF THE RESONANCE PROPERTIES OF HELMHOLTZ RESONATORS." ScienceRise 4 (August 31, 2020): 10–16. http://dx.doi.org/10.21303/2313-8416.2020.001389.

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The object of research. Process of oscillation of the Helmholtz resonators. Investigated problem. Differences between some formulas for the calculation of the resonant frequency of the Helmholtz resonator and the most accurate of them were established. The effect of acoustic design on the Helmholtz resonator frequency value and influence of the attached air mass between the neck of the Helmholtz resonator and free field were investigated. The main scientific results. As a result of a numerical experiment, analytical ratios were obtained that allow obtaining the most accurate results. One of th

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LALY, Zacharie, Christopher Mechefske, Sebastian Ghinet, Charly T. Kone, and Noureddine Atalla. "Numerical design of Helmholtz resonators with multiple necks for multi-tonal noise control." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 265, no. 7 (2023): 354–65. http://dx.doi.org/10.3397/in_2022_0053.

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The reduction of multi-tonal noise at multiple frequencies simultaneously is a challenge in many industrial fields. Different solutions such as metamaterials consisting of periodic Helmholtz resonators embedded into a porous layer have been studied in the literature. Generally, a classical resonator made of a cavity connected to a neck provides only one resonant transmission loss peak. In this study, a design of acoustic metamaterials is proposed numerically using the finite element method for multi-tonal noise reduction. The resonator is made of multiple necks extended into the cavity and is

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Liu, Jiacheng, Temesgen Bailie Workie, Ting Wu, et al. "Q-Factor Enhancement of Thin-Film Piezoelectric-on-Silicon MEMS Resonator by Phononic Crystal-Reflector Composite Structure." Micromachines 11, no. 12 (2020): 1130. http://dx.doi.org/10.3390/mi11121130.

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Thin-film piezoelectric-on-silicon (TPoS) microelectromechanical (MEMS) resonators are required to have high Q-factor to offer satisfactory results in their application areas, such as oscillator, filter, and sensors. This paper proposed a phononic crystal (PnC)-reflector composite structure to improve the Q factor of TPoS resonators. A one-dimensional phononic crystal is designed and deployed on the tether aiming to suppress the acoustic leakage loss as the acoustic wave with frequency in the range of the PnC is not able to propagate through it, and a reflector is fixed on the anchoring bounda

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Rapp, Bastian E., Achim Voigt, Marian Dirschka, Michael Rapp, and Kerstin Länge. "Surface Acoustic Wave Resonator Chip Setup for the Elimination of Interfering Conductivity Responses." Micromachines 15, no. 4 (2024): 501. http://dx.doi.org/10.3390/mi15040501.

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A surface acoustic wave (SAW) resonator chip setup is presented that eliminates interfering signal responses caused by changes in the electrical environment of the surrounding media. When using a two-port resonator, applying electrically shielding layers between the interdigital transducers (IDTs) can be challenging due to the limited dimensions. Therefore, a layered setup consisting of an insulating polymer layer and a conductive gold layer was preferred. The SAW resonators were provided with polycarbonate housings, resulting in SAW resonator chips. This setup enables easy application of a wi

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Lowe, Todd, Kevin Silas, George Boggs, and Wing Ng. "An experimental study on the coupling between adjacent Hartmann whistles." International Journal of Aeroacoustics 18, no. 2-3 (2019): 299–316. http://dx.doi.org/10.1177/1475472x19834525.

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An experimental study has been conducted to examine interactions between two Hartmann whistles placed in close proximity. Microphone measurements of acoustic emission from the whistles, in addition to high-speed flow field visualizations, were used to assess the physical mechanisms present. A strong coupling mode has been identified that results in frequency locking between the resonators. Observed for only one set of parameters in the experimental matrix, the frequency-locked coupling requires sufficient spacing between the nozzle exit and resonator cup of each whistle to establish the acoust

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Sachedina, Karim, Thomas Lato, Atef Mohany, and Marwan Hassan. "Effect of Incident Acoustic Pressure Amplitude on the Transmission Loss of Helmholtz Resonators." Vibration 3, no. 1 (2020): 34–41. http://dx.doi.org/10.3390/vibration3010004.

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Acoustic transmission loss is a common parameter utilized throughout several studies to evaluate the acoustic characteristics of a given test element. Transmission loss has been frequently referred to as a source independent parameter. However, this work presents evidence that the incident acoustic pressure amplitude does, in fact, have an effect on the measured transmission loss for some passive damping devices. The transmission loss was experimentally measured utilizing the two-source location method and the specimens tested include an expansion chamber, a quarter wave resonator, a Herschel–

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Chen, Ren Song, Xiu Hai Chen, Xin Jun Gao, et al. "Studies on the Acoustic Characteristics of the Hartmann Acoustic Generator." Applied Mechanics and Materials 472 (January 2014): 364–68. http://dx.doi.org/10.4028/www.scientific.net/amm.472.364.

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Based on the method FW-H acoustic model, how the parameters influence acoustic characteristics of the Hartmann acoustic generator were studied, which are resonator length, spacing between the jet and resonator tube, the diameter of resonator tube. The conclusions were induced just as below. The total sound pressure level (SPL) increases with the length of resonator tube, while the magnitude of fundamental frequency is reverse. And the total SPL oscillates with the increase of spacing between jet and resonator, and the oscillating distance period increases with diameter of resonator tube. And t

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Dogra, Sourabh, and Arpan Gupta. "Design, Manufacturing, and Acoustical Analysis of a Helmholtz Resonator-Based Metamaterial Plate." Acoustics 3, no. 4 (2021): 630–41. http://dx.doi.org/10.3390/acoustics3040040.

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Acoustic metamaterials are materials artificially engineered to control sound waves, which is not possible with conventional materials. We have proposed a design of an acoustic metamaterial plate with inbuilt Helmholtz resonators. The plate is made of Polylactic acid (PLA) which is fabricated using an additive manufacturing technique. It consists of Helmholtz resonator-shaped cavities of different sizes. In this paper, we have analyzed the acoustic properties of the Helmholtz resonators-based metamaterial plate experimentally as well as numerically. The experimental results are in good agreeme

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LALY, Zacharie, Christopher Mechefske, Sebastian Ghinet, Charly T. Kone, and Noureddine Atalla. "Numerical modelling of acoustic metamaterial made of periodic Helmholtz resonator containing a damping material in the cavity." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 265, no. 7 (2023): 343–53. http://dx.doi.org/10.3397/in_2022_0052.

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Acoustic metamaterials are frequently used in many fields such as aerospace, buildings and ground transportation industries for low frequency noise control applications. Different solutions based on membrane or Helmholtz resonators have been investigated in the past few years. In the present study, a numerical design of acoustic metamaterial made of Helmholtz resonator with a membrane in its cavity is presented. The resonator with a neck extended into the cavity is periodically embedded within a porous material. The membrane inside the resonator cavity is modelled as a linear isotropic elastic

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Yuliia, Kopytko, Zaets Vitaliy, Naida Sergey, Didkovskyi Vitaliy, and Damarad Anastasiia. "RESEARCH OF THE RESONANCE PROPERTIES OF HELMHOLTZ RESONATORS." ScienceRise, no. 4 (August 31, 2020): 10–16. https://doi.org/10.21303/2313-8416.2020.001389.

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<strong>The object of research</strong><strong>. </strong>Process of oscillation of the Helmholtz resonators. <strong>Investigated problem</strong><strong>. </strong>Differences between some formulas for the calculation of the resonant frequency of the Helmholtz resonator and the most accurate of them were established. The effect of acoustic design on the Helmholtz resonator frequency value and influence of the attached air mass between the neck of the Helmholtz resonator and free field were investigated. <strong>The main scientific results</strong><strong>. </strong>As a result

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