Journal articles: 'Sound panel'

1

Perdue, Jay. "Sound absorbing panel." Journal of the Acoustical Society of America 102, no. 6 (1997): 3249. http://dx.doi.org/10.1121/1.419557.

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Papakonstantinou, Panagiotis. "Sound absorbing panel." Journal of the Acoustical Society of America 125, no. 2 (2009): 1264. http://dx.doi.org/10.1121/1.3081348.

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3

Wolf, Jerry M., and Wilbur D. Holben. "Sound absorption panel." Journal of the Acoustical Society of America 79, no. 4 (April 1986): 1196. http://dx.doi.org/10.1121/1.393753.

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4

Richardson, Brian E. "Sound-attenuating panel." Journal of the Acoustical Society of America 99, no. 4 (1996): 1821. http://dx.doi.org/10.1121/1.415353.

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Mekwinski, Julius. "Sound absorbing panel." Journal of the Acoustical Society of America 118, no. 2 (2005): 592. http://dx.doi.org/10.1121/1.2040263.

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Johnson, Lahnie. "Sound reducing panel." Journal of the Acoustical Society of America 120, no. 6 (2006): 3448. http://dx.doi.org/10.1121/1.2409431.

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7

Wirt, Leslie S. "Sound absorbing panel." Journal of the Acoustical Society of America 83, no. 1 (January 1988): 403. http://dx.doi.org/10.1121/1.396200.

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8

Stoll, Werner, and Edgar Weiss. "Sound absorbing panel." Journal of the Acoustical Society of America 86, no. 6 (December 1989): 2475. http://dx.doi.org/10.1121/1.398388.

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Chen, Kean, and Gary H. Koopmann. "Active Control of Low-Frequency Sound Radiation From Vibrating Panel Using Planar Sound Sources." Journal of Vibration and Acoustics 124, no. 1 (July 1, 2001): 2–9. http://dx.doi.org/10.1115/1.1420197.

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Active control of low frequency sound radiation using planar secondary sources is theoretically investigated in this paper. The primary sound field originates from a vibrating panel and the planar sources are modeled as simply supported rectangular panels in an infinite baffle. The sound power of the primary and secondary panels are calculated using a near field approach, and then a series of formulas are derived to obtain the optimum reduction in sound power based on minimization of the total radiate sound power. Finally, active reduction for a number of secondary panel arrangements is examined and it is concluded that when the modal distribution of the secondary panel does not coincide with that of the primary panel, one secondary panel is sufficient. Otherwise four secondary panels can guarantee considerable reduction in sound power over entire frequency range of interest.

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10

Chenxi, L. I., H. U. Ying, and H. E. Liyan. "Exploration and optimization on the usage of micro-perforated panels as trim panels in commercial aircrafts." Noise Control Engineering Journal 68, no. 1 (January 20, 2020): 87–100. http://dx.doi.org/10.3397/1/37687.

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Micro-perforated panels (MPPs), as an alternative to porous materials for sound absorption, have been commonly used in electronic industries and aircraft engines but are barely used in aircraft cabins. The effect of MPPs on the sound insulation and absorption properties of aircraft cabin panels has been investigated in this article. Theoretical modeling has been conducted on an aircraft cabin panel structure with a trim panel replaced by an MPP trim panel, using the transfer matrix method and the classic MPP theory. It is indicated by the theoretical results that, although the sound transmission loss (STL) of the cabin panel with an MPP trim panel is lower than that with an un-perforated panel, the MPP trim panel can significantly enhance the sound absorption coefficient of the entire cabin panel structure. Based on the well-developed MPP theory, the sound absorption coefficient of an aircraft cabin panel with an MPP trim panel can be improved by optimizing the MPP's parameters at a specific frequency. Taking an engine frequency 273 Hz as an example, the optimization can increase the sound absorption coefficient to 1 by using the doublelayered MPPs. When the thermal acoustic insulation blanket is considered, although the STL of the proposed structure with double-layered MPP trim panels in a diffuse field is lower than those without MPP trim panels, the sound absorption in the cabin is significantly enhanced due to the double-layer MPP trim panel at the specific engine frequency and across all frequencies. The STL of the structure with double-layered MPP trim panels and TAIB can be higher than 40 dB from 880 Hz in a diffuse field, which implies its effectiveness as sound insulation structure in aviation industry. MPP trim panels provide a new idea for the design of aircraft cabin panels and areworthy of further research

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11

Astrauskas, Tomas, Tomas Januševičius, and Raimondas Grubliauskas. "Acoustic Panels Made of Paper Sludge and Clay Composites." Sustainability 13, no. 2 (January 11, 2021): 637. http://dx.doi.org/10.3390/su13020637.

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Studies on recycled materials emerged during recent years. This paper investigates samples’ sound absorption properties for panels fabricated of a mixture of paper sludge (PS) and clay mixture. PS was the core material. The sound absorption was measured. We also consider the influence of an air gap between panels and rigid backing. Different air gaps (50, 100, 150, 200 mm) simulate existing acoustic panel systems. Finally, the PS and clay composite panel sound absorption coefficients are compared to those for a typical commercial absorptive ceiling panel. The average sound absorption coefficient of PS-clay composite panels (αavg. in the frequency range from 250 to 1600 Hz) was up to 0.55. The resulting average sound absorption coefficient of panels made of recycled (but unfinished) materials is even somewhat higher than for the finished commercial (finished) acoustic panel (αavg. = 0.51).

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Astrauskas, Tomas, Tomas Januševičius, and Raimondas Grubliauskas. "Acoustic Panels Made of Paper Sludge and Clay Composites." Sustainability 13, no. 2 (January 11, 2021): 637. http://dx.doi.org/10.3390/su13020637.

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Studies on recycled materials emerged during recent years. This paper investigates samples’ sound absorption properties for panels fabricated of a mixture of paper sludge (PS) and clay mixture. PS was the core material. The sound absorption was measured. We also consider the influence of an air gap between panels and rigid backing. Different air gaps (50, 100, 150, 200 mm) simulate existing acoustic panel systems. Finally, the PS and clay composite panel sound absorption coefficients are compared to those for a typical commercial absorptive ceiling panel. The average sound absorption coefficient of PS-clay composite panels (αavg. in the frequency range from 250 to 1600 Hz) was up to 0.55. The resulting average sound absorption coefficient of panels made of recycled (but unfinished) materials is even somewhat higher than for the finished commercial (finished) acoustic panel (αavg. = 0.51).

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13

Fridh, Lars, and Stig Ingemansson. "Perforated sound absorbing panel." Journal of the Acoustical Society of America 87, no. 2 (February 1990): 925. http://dx.doi.org/10.1121/1.398884.

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14

Rex, Robert G. "Sound barrier absorption panel." Journal of the Acoustical Society of America 96, no. 3 (September 1994): 1946. http://dx.doi.org/10.1121/1.410169.

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15

Kliegle, Dennis R., and Alfonso E. Perez. "SOUND REFLECTIVE ACOUSTIC PANEL." Journal of the Acoustical Society of America 131, no. 4 (2012): 3199. http://dx.doi.org/10.1121/1.4707492.

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16

Barathi, P. "Sound Doc\'s Panel." Annals of SBV 2, no. 2 (2013): 53. http://dx.doi.org/10.5005/jp-journals-10085-2225.

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17

Dias, Gary R., and Richard Montgomery. "Sound absorbing wall panel." Journal of the Acoustical Society of America 99, no. 4 (1996): 1821. http://dx.doi.org/10.1121/1.415351.

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18

Murzinov, Valery, Pavel Murzinov, and Irina Ivanovna. "COMPARATIVE ANALYSIS OF SOUND SUPRESSING LIGHTWEIGHT STRUCTURED PANELS AND MODERN NOISE PROTECTION MEANS." Akustika 32 (March 1, 2019): 30–35. http://dx.doi.org/10.36336/akustika20193230.

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This article provides an overview of modern soundproof materials and structures used for acoustic insulation. Presently, we can find plenty of such noise insulation and sound absorption materials. One of the popular means to reduce noise and control sound today is the acoustic panels able to suppress and absorb different sounds. The article also analyses the effectiveness of acoustic and sound protection materials used in the industrial sphere. The comparative analysis of the sound protection and absorption effectiveness is carried out using sound absorption coefficients. It also presents the construction of a sound suppressing lightweight structured panel designed by the authors. The authors noted that these panels have better characteristics in comparison with other modern sound protection materials.

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19

Kim, Jaehw an. "Smart Panel Technology for Broadband Noise Reduction." Noise & Vibration Worldwide 34, no. 7 (July 2003): 13–22. http://dx.doi.org/10.1260/095745603322330044.

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The possibility of a broadband noise reduction by piezoelectric smart panels is demonstrated. A smart panel is basically a plate structure on which piezoelectric patches with electrical shunt circuits are mounted and sound absorbing material is bonded on the surface of the structure. Sound absorbing material can absorb the sound transmitted at the mid frequency region effectively while the use of piezoelectric shunt damping can reduce the transmission at resonance frequencies of the panel structure. To be able to reduce the sound transmission at low panel resonance frequencies, piezoelectric damping is adopted. A resonant shunt circuit for piezoelectric shunt damping is composed of resistor and inductor in series, and they are determined by maximizing the dissipated energy through the circuit. The transmitted noise reduction performance of smart panels was tested in an acoustic tunnel. Sound absorbing material and air gap reduces the sound transmitted at the mid-frequency region effectively while the use of piezoelectric shunt damping works at the low frequency region. As a result, a remarkable noise reduction of 9-15dB was achieved in broadband frequency. Double panel exhibits better noise reduction than other panels. This approach was also applied to the structural acoustic problem of turbulent boundary layer (TBL) induced sound radiated from a panel, and the possibility of TBL noise reduction was demonstrated. The hybrid approach of smart panels is a promising technology for noise reduction over broad frequency band.

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Murzinov, Valery, Pavel Murzinov, Sergey Popov, and Julia Taratinova. "SOUND ABSORPTION OF SOUND SUPRESSING LIGHTWEIGHT STRUCTURED PANELS." Akustika 34 (November 1, 2019): 40–43. http://dx.doi.org/10.36336/akustika20193440.

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Description of the effective soundproofing panel is presented. For this panel, the ratio of acoustic characteristics and surface density exceeds many modern sound insulation and sound absorbing materials and structures. This article is devoted to modeling the sound absorption coefficient of the soundproof panel. The article presents formulas for determining the coefficient of sound absorption. Construction of a sound suppressed lightweight structured panel (SSLSP) developed by the authors is shown. Comparison of the effectiveness of the SSLSP panel and modern sound-proof materials is shown.

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21

Park, Hyun Chul, Ju Haeng Lee, Il Ho Kim, Muhammad Sajjad, Kwang Ho Ahn, and Kwang Soo Kim. "Effects of Nano-Porous Materials and Inert Gas on Sound Proof Properties of Double Layer Acryl Plate." Materials Science Forum 804 (October 2014): 89–92. http://dx.doi.org/10.4028/www.scientific.net/msf.804.89.

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The purpose of this study was to investigate the sound proof properties of the double layer acryl plates with various packing materials inside. The acryl plates were filled with vacuum pressure ranged from-20 to-80 kPa, fumed silica as nanoporous materials, and HCFC (hydrochloro-fluorocarbon) as inert gas. The sound pressure level passed though panels was measured to compare soundproof performance. All other panel showed better performance from 500-1000 Hz than air layer panel. For the vacuum layer panel, panel with-80 kPa showed the best performance among other vacuum layer panel throughout all range of frequency. It is found that the more nanomaterial filled in panel, the lower sound proof performance. When it comes to panel filled with inert gas, the sound proof performance improved when it has greater pressure of gas.

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22

Ognibeni, Fabio. "Sound Panel For Playing Sounds And Music, And Method For Manufacturing Such Panel." Journal of the Acoustical Society of America 130, no. 6 (2011): 4174. http://dx.doi.org/10.1121/1.3668748.

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23

Erofeev, V. I., and D. V. Monich. "IMPROVEMENT POTENTIAL FOR SOUND INSULATION OF SINGLE- AND MULTILAYER WALL PANELS." Vestnik Tomskogo gosudarstvennogo arkhitekturno-stroitel'nogo universiteta. JOURNAL of Construction and Architecture 22, no. 5 (October 31, 2020): 98–110. http://dx.doi.org/10.31675/1607-1859-2020-22-5-98-110.

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Relevance: Acoustic comfort in residential, public and industrial buildings. Existing types of wall panels often do not provide the required noise control.Purpose: Investigation of the improvement potential for sound insulation of single- and multi-layer wall panels having finitegeometric dimensions with diffuse sound lowering. Design/methodology/approach: Consideration of the sound propagation through the wall panel based on the theory of selfcoordination of wave fields developed by the Prof. Sedov‟s scientific school.Research findings: Analytical equations for calculating the limiting sound insulation of the wall panels determined by the inertial sound propagation. The improvement potential for sound insulation of single- and multi-layer wall panels having finite dimensions. Comparison of theoretical and xperimental results. It is shown that single- and multi-layer wall panels of finite geometric dimensions have improvement potential for sound insulation, which is determined by the ratio between their own and limiting sound insulation.Practical implications: Wall panel design must take into account the improvement potential for sound insulation. The sound insulation of wall panels is improved without increasing their mass and thickness. This is of great importance for design solutions for wall panels of civil and industrial buildings.Originality/value: The proposed method shows good agreement between experimental data and theoretical calculations. The improvement potential for sound insulation at the frequency level locates near the resonant frequencies, namely: near-boundary frequency of the full spatial resonance for single-layer wall panels; near-resonant frequency of the mass-elasticity-mass panels and near-boundary frequency of the full spatial resonance for multilayer wall panels and panel linings, respectively.

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G, K. Krisna, I. Gusti Agung Widagda, and Komang Ngurah Suarbawa. "Human Voice Recognition by Using Hebb Artificial Neural Network Method." BULETIN FISIKA 19, no. 1 (May 1, 2018): 16. http://dx.doi.org/10.24843/bf.2018.v19.i01.p04.

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It has been created a program to recognize human voice by using artificial neural network (ANN). The ANN method used is Hebb. Hebb was chosen because it is the simplest ANN so the training and testing process is faster than other methods. Designing the program is started by designing Hebb’s architecture and design of GUI (Graphical User Interface) using Matlab R2009a. The design of Hebb's architecture consists of 4500 inputs and 3 outputs. The GUI design of the program consists of three main sections: recording panels to record sample sounds, training panels to determine the weighted value and bias of the training results according to the Hebb training algorithm, and the testing panel to test the test sounds according to the Hebb testing algorithm. After program design, proceed with the testing of the program. Testing of the program starts with the sound recording of samples from 8 different people using the record panel. Each person has 1 voice sample for training data. Then proceed with the Hebb training process using the training panel, weight and bias value displayed on the training panel. After the weight and bias values ??are obtained, proceed with the Hebb testing process using 16 test sound data consisting of 8 sound data equal to training data and 8 noise data. From the testing program process obtained a result of 100% for the level of recognition of the same voice data with training data and for noise data has a recognition rate of 87.5%.

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Quan, Gao Feng, Zhao Ming Liu, Xiue Gu, and Feng Yan. "Sound Insulation Study on Mg Sheet and Mg Honeycomb Panels." Materials Science Forum 654-656 (June 2010): 743–46. http://dx.doi.org/10.4028/www.scientific.net/msf.654-656.743.

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The sound insulation experiments were conducted to magnesium alloy sheet and magnesium honeycomb panels. It is found that the sound insulation coefficient (transmission loss, TL) of honeycomb panel is higher than that of the sheet in full sound frequency spectra, and TL spectra of both single sheet and honeycomb panel is similar with the sound frequency, thus the TL is increased obviously with the frequency. Comparably, TL of honeycomb panels is always higher than that of the sheets, especially at middle range of frequencies 6 kHz~10 kHz, the sheet has a TL of 27 to 31dB, and the honeycomb panel has 34-39 dB. The parameters of honeycomb cores is discussed briefly.

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Li, Yuan-Wei, and Chao-Nan Wang. "Analysis of the transmission loss of double-leaf panels with an equivalent spring–mass model for studs." Journal of Mechanics 37 (December 19, 2020): 126–33. http://dx.doi.org/10.1093/jom/ufaa020.

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Abstract The purpose of this study was to investigate the sound insulation of double-leaf panels. In practice, double-leaf panels require a stud between two surface panels. To simplify the analysis, a stud was modeled as a spring and mass. Studies have indicated that the stiffness of the equivalent spring is not a constant and varies with the frequency of sound. Therefore, a frequency-dependent stiffness curve was used to model the effect of the stud to analyze the sound insulation of a double-leaf panel. First, the sound transmission loss of a panel reported by Halliwell was used to fit the results of this study to determine the stiffness of the distribution curve. With this stiffness distribution of steel stud, some previous proposed panels are also analyzed and are compared to the experimental results in the literature. The agreement is good. Finally, the effects of parameters, such as the thickness and density of the panel, thickness of the stud and spacing of the stud, on the sound insulation of double-leaf panels were analyzed.

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Arunkumar, MP, Jeyaraj Pitchaimani, KV Gangadharan, and MC Lenin Babu. "Sound transmission loss characteristics of sandwich aircraft panels: Influence of nature of core." Journal of Sandwich Structures & Materials 19, no. 1 (November 9, 2016): 26–48. http://dx.doi.org/10.1177/1099636216652580.

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Sandwich panel which has a design involving acoustic comfort is always denser and larger in size than the design involving mechanical strength. The respective short come can be solved by exploring the impact of core geometry on sound transmission characteristics of sandwich panels. In this aspect, the present work focuses on the study of influence of core geometry on sound transmission characteristics of sandwich panels which are commonly used as aircraft structures. Numerical investigation has been carried out based on a 2D model with equivalent elastic properties. The present study has found that, for a honeycomb core sandwich panel in due consideration to space constraint, better sound transmission characteristics can be achieved with lower core height. It is observed that, for a honeycomb core sandwich panel, one can select cell size as the parameter to reduce the weight with out affecting the sound transmission loss. Triangular core sandwich panel can be used for low frequency application due to its increased transmission loss. In foam core sandwich panel, it is noticed that the effect of face sheet material on sound transmission loss is significant and this can be controlled by varying the density of foam.

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Shuldeshov, Е. М., I. D. Kraev, and М. М. Platonov. "Polymeric composition sound absorbing panel." Proceedings of VIAM, no. 5 (May 2017): 7. http://dx.doi.org/10.18577/2307-6046-2017-0-5-7-7.

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Bly, Sara A., Steven P. Frysinger, David Lunney, Douglass L. Mansur, Joseph J. Mezrich, and Robert C. Morrison. "Communicating with sound (panel session." ACM SIGCHI Bulletin 16, no. 4 (April 1985): 115–19. http://dx.doi.org/10.1145/1165385.317477.

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30

Woodman, Daniel Scott. "Decorative interior sound absorbing panel." Journal of the Acoustical Society of America 123, no. 6 (2008): 4036. http://dx.doi.org/10.1121/1.2942438.

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31

Rerup, Hans J. "Panel section for sound barrier." Journal of the Acoustical Society of America 127, no. 6 (2010): 3875. http://dx.doi.org/10.1121/1.3455397.

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Rerup, Hans J. "Panel section for sound barrier." Journal of the Acoustical Society of America 127, no. 6 (2010): 3866. http://dx.doi.org/10.1121/1.3457077.

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33

Kumar, Sathish, Leping Feng, and Ulf Orrenius. "Predicting the Sound Transmission Loss of Honeycomb Panels using the Wave Propagation Approach." Acta Acustica united with Acustica 97, no. 5 (September 1, 2011): 869–76. http://dx.doi.org/10.3813/aaa.918466.

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The sound transmission properties of sandwich panels can be predicted with sufficient degree of accuracy by calculating the wave propagation properties of the structure. This method works well for sandwich panels with isotropic cores but applications to panels with anisotropic cores are hard to find. Honeycomb is an example of anisotropic material which when used as a core, results in a sandwich panel with anisotropic properties. In this paper, honeycomb panels are treated as being orthotropic and the wavenumbers are calculated for the two principle directions. These calculated wavenumbers are validated with the measured wavenumbers estimated from the resonance frequencies of freely hanging honeycomb beams. A combination of wave propagation and standard orthotropic plate theory is used to predict the sound transmission loss of honeycomb panels. These predictions are validated through sound transmission measurements. Passive damping treatment is a common way to reduce structural vibration and sound radiation, but they often have little effect on sound transmission. Visco-elastic damping with a constraining layer is applied to two honeycomb panels with standard and enhanced fluid coupling properties. This enhanced fluid coupling in one of the test panels is due to an extended coincidence range observed from the dispersion curves. The influence of damping treatments on the sound transmission loss of these panels is investigated. Results show that, after the damping treatment, the sound transmission loss of an acoustically bad panel and a normal panel are very similar.

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Samsudin, Emedya Murniwaty, Lokman Hakim Ismail, Aeslina Abd Kadir, Ida Norfaslia Nasidi, and Noor Sahidah Samsudin. "Rating of Sound Absorption for EFBMF Acoustic Panels according to ISO 11654:1997." MATEC Web of Conferences 150 (2018): 03002. http://dx.doi.org/10.1051/matecconf/201815003002.

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Empty fruit bunch fibre (EFB) and mesocarp fibre (MF) have been used in the fabrication of a new acoustic panel as a sound absorber for building. Measurements were carried out following ISO 354 in the mini reverberation chamber and the sound absorption performance of EFBMF acoustic panels were rated based on ISO 11654. Measurements of the new EFBMF acoustic panel involves five panel designs of 100 EFB dust panels, 80:20 dust panels, 100MF coir panels, 90:10 coir panels and 50:50 coir panels with 5 cm of initial thickness. Results showed that 100MF coir panel achieved αw of 0.90 coefficient and was rated as Class A absorber followed by 90:10 coir panels with αw of 0.85 coefficient and 100 EFB dust, 80:20 dust and 50:50 coir panels having αw of 0.80 coefficients and been rated as Class B absorber. This research has successfully defined that EFB and MF are viable to be used as raw fibre for acoustic absorber for building.

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He, Hai, Hong Zhou, and Xiang Li. "Study on Test Method of Interior Noise Caused by Body Panels." Applied Mechanics and Materials 365-366 (August 2013): 650–53. http://dx.doi.org/10.4028/www.scientific.net/amm.365-366.650.

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This paper introduced four common test methods of acoustic contribution of body panels. The methods using PU sensor to array measure vibration velocity of body panels. Then, the vibration velocity of body panel multiplied by the area of panel to get the value of sound source intensity. Use reciprocity method to measure acoustic transfer function. In the experiment, the vector sum of the product of sound-source intensity and acoustic transfer function is used to compose the sound pressure contribution of the panels. The experiment proves that the composite value of acoustic pressure spectrum of drivers right ear coincide with the measured value. Therefore, this method is proved to be valid.

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Zuhaira Ismail, Farrah, Mohamad Nidzam Rahmat, and Norishahaini M. Ishak. "A Study on Absorption Coefficient of Sustainable Acoustic Panels from Rice Husks and Sugarcane Baggase." Advanced Materials Research 1113 (July 2015): 198–203. http://dx.doi.org/10.4028/www.scientific.net/amr.1113.198.

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Noise has detrimental effects on human lives and it is a nuisance to the environment. As many of the available sound reduction materials in the current market are hazardous, there are demands for alternative sustainable materials to reduce the noise problem. Therefore, the aim of this research is to study the potential of using an agricultural waste as sound absorption panel. For the purpose of this study, the combination of two materials was under studied; rice husks and sugarcane baggase. There were two main objective of the research; first is to develop absorption panels from the combination of rice husks and sugarcane baggase at different percentage of mixture. Second objective is to identify the absorption rate of the panels. The study encompasses the fabrication of the sustainable sound panels using the rice husk and sugarcane fibre and bond using Phenol formaldehyde (PF). Five panels of sized 12 inch x 12 inch and 12 mm thick were fabricated. The absorption coefficient of the samples was done at the acoustic lab, Faculty of Engineering & Build Environment, Universiti Kebangsaan Malaysia (UKM), Bangi. The panels were tested using an impedance tube. The procedure of the test was carried out in accordance with ISO 10534-2:1998 standards. Based on the results, sample 1 gave the highest absorption coefficient compared to sample 2, 3, 4 and 5. It can be concluded that the acoustic panel made from a mixture of 100% rice husks had higher absorption co-efficient compared to the performance of the other samples given the fact that the characteristic of the rice husks which has air gap in every single piece of rice husk. The spongy properties of the sample 1 panel has created many void spaces which encouraged more sound absorption capability due to the porous surface of the panel. Sound absorption is very much affected by the availability of porosity level of the panel. Thus, further studies on other potential materials from waste should be conducted.Keywords. Noise, Agriculture waste, sound, absorption panels, absorption co-efficient

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Vacek, Vítězslav, Jiří Kolísko, Jan Tichý, and Renata Cvancigerová. "Concrete Precast Panel for Noise Barrier of New Generation." Advanced Materials Research 1106 (June 2015): 114–17. http://dx.doi.org/10.4028/www.scientific.net/amr.1106.114.

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Subject of the article is development of reinforced sound-deadening panel of new generation for protection of the environment against noise coming from operation on linear transport buildings. These reinforced sound-deadening panels are made from cavern concrete, reinforced with concrete steel reinforcement protected with special anti-corrosion coating. Prototype of the panel was tested according to valid standards from the aspect of acoustic parameters, material characteristics of used concrete and mechanical parameters of the panel.

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Xin, Feng Xian, T. J. Lu, and Chang Chen. "Sound Transmission through Lightweight All-Metallic Sandwich Panels with Corrugated Cores." Advanced Materials Research 47-50 (June 2008): 57–60. http://dx.doi.org/10.4028/www.scientific.net/amr.47-50.57.

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The transmission of sound through all-metallic sandwich panels with corrugated cores is investigated using the space-harmonic method. The sandwich panel is modeled as two parallel panels connected by uniformly distributed translational springs and rotational springs, with the mass of the core sheets taken as lumped mass. Based on the periodicity of the panel structure, a unit cell model is developed to provide the effective translational and rotational stiffness of the core. The model is used to investigate the influence of sound incidence angle and the inclination angle between facesheet and core sheet on the sound transmission loss (STL) of the sandwich structure. The results show that the inclination angle has a significant effect on STL, and sandwich panels with corrugated cores are more suitable for the insulation of sound having small incidence angle.

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39

Sahu, Kiran Chandra, and Jukka Tuhkuri. "Active structural acoustic control of transmitted sound through a double panel partition by weighted sum of spatial gradients." Journal of Low Frequency Noise, Vibration and Active Control 36, no. 1 (March 2017): 27–42. http://dx.doi.org/10.1177/0263092317693479.

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Active control of harmonic sound transmission through an acoustically baffled, rectangular, simply supported double panel partition has been analytically studied. Velocity potential method is used for the vibro-acoustic modeling unlike the commonly used cavity mode method. It is very well-known that at high frequencies uncontrolled double panel partition mostly radiates sound due to the dipole-type motion of the radiating panel, which the volume velocity method can't be able to detect, therefore, weighted sum of spatial gradients is used to control these modes and achieves sound attenuation in a broad frequency band. A piezoceramic actuator (lead zirconate titanate) is attached on one side of the panel surface, and the optimal magnitude and phase of the voltage supplied to the lead zirconate titanate for minimizing the weighted sum of spatial gradients and volume velocity at the error sensor locations are calculated using a simple-gradient based algorithm. Numerical results of sound power transmission ratio and averaged quadratic velocity of panels indicate that lead zirconate titanate should be placed on the incident panel and minimization of the control quantities should be done on the radiating panel to achieve better sound attenuation. The acoustic radiation mode analysis shows that the weighted sum of spatial gradients is able to control multiple acoustic radiation modes and, thereby, accomplishes better reduction of sound power transmission compared to volume velocity.

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Kaamin, Masiri, Nor Farah Atiqah Ahmad, Norhayati Ngadiman, Aslila Abdul Kadir, Siti Nooraiin Mohd Razali, Mardiha Mokhtar, and Suhaila Sahat. "Study on The Effectiveness of Egg Tray and Coir Fibre as A Sound Absorber." E3S Web of Conferences 34 (2018): 02005. http://dx.doi.org/10.1051/e3sconf/20183402005.

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Sound or noise pollution has become one major issues to the community especially those who lived in the urban areas. It does affect the activity of human life. This excessive noise is mainly caused by machines, traffic, motor vehicles and also any unwanted sounds that coming from outside and even from the inside of the building. Such as a loud music. Therefore, the installation of sound absorption panel is one way to reduce the noise pollution inside a building. The selected material must be a porous and hollow in order to absorb high frequency sound. This study was conducted to evaluate the potential of egg tray and coir fibre as a sound absorption panel. The coir fibre has a good coefficient value which make it suitable as a sound absorption material and can replace the traditional material; syntactic and wooden material. The combination of pyramid shape of egg tray can provide a large surface for uniform sound reflection. This study was conducted by using a panel with size 1 m x 1 m with a thickness of 6 mm. This panel consist of egg tray layer, coir fibre layer and a fabric as a wrapping for the aesthetic value. Room reverberation test has been carried to find the loss of reverberation time (RT). Result shows that, a reverberation time reading is on low frequency, which is 125 Hz to 1600 Hz. Within these frequencies, this panel can shorten the reverberation time of 5.63s to 3.60s. Hence, from this study, it can be concluded that the selected materials have the potential as a good sound absorption panel. The comparison is made with the previous research that used egg tray and kapok as a sound absorption panel.

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Jung, Jae-Deok, Suk-Yoon Hong, Jee-Hun Song, and Hyun-Wung Kwon. "Sound insulation analysis of micro-perforated panel coupled with honeycomb panel considering air cavity for offshore plants." Proceedings of the Institution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment 233, no. 4 (November 2, 2018): 1037–55. http://dx.doi.org/10.1177/1475090218808993.

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The wall panels used in offshore plants require sound insulation performance as well as fireproofing. A honeycomb panel made of metal is incombustible but unsatisfactory at the middle frequencies for sound transmission loss because the coincidence frequency occurs when the bending wavelength on the panel matches the wavelength of the incident wave. In this study, the application of a micro-perforated plate to the honeycomb panel was considered to supplement the sound transmission loss at the middle frequencies. The honeycomb core was assumed to overlap an orthotropic layer with an air layer, and face sheets were assumed to be isotropic. The kinetic and potential energy for the face sheets and the honeycomb core, the kinetic energy for the air layer located between the face sheets, and the sound absorption coefficient for the panel were derived. These were substituted into the Lagrange equation, and by solving the equation, the sound transmission loss was obtained. By comparing the experimental results with theoretically predicted results, it was found that the theory well reflected the measured surface density, elasticity, and absorption coefficient. Finally, simulations were performed for the micro-perforated plate perforation presence, micro-perforated plate perforation diameter, cell wall thickness, and cell size. These were analyzed with regard to the surface density, elasticity, and absorption coefficient.

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Balasubramanian, Dhayalini, Senthil Rajendran, Bhuvanesh Srinivasan, and Nirmalakumari Angamuthu. "Elucidating the Sound Absorption Characteristics of Foxtail Millet (Setariaitalica) Husk." Materials 13, no. 22 (November 13, 2020): 5126. http://dx.doi.org/10.3390/ma13225126.

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The current study deals with the analysis of sound absorption characteristics of foxtail millet husk powder. Noise is one the most persistent pollutants which has to be dealt seriously. Foxtail millet is a small seeded cereal cultivated across the world and its husk is less explored for its utilization in polymer composites. The husk is the outer protective covering of the seed, rich in silica and lingo-cellulose content making it suitable for sound insulation. The acoustic characterization is done for treated foxtail millet husk powder and polypropylene composite panels. The physical parameters like fiber mass content, density, and thickness of the composite panel were varied and their influence over sound absorption was mapped. The influence of porosity, airflow resistance, and tortuosity was also studied. The experimental result shows that 30-mm thick foxtail millet husk powder composite panel with 40% fiber mass content, 320 kg/m3 density showed promising sound absorption for sound frequency range above 1000 Hz. We achieved noise reduction coefficient (NRC) value of 0.54. In view to improve the performance of the panel in low-frequency range, we studied the efficiency of incorporating air gap and rigid backing material to the designed panel. We used foxtail millet husk powder panel of density 850 kg/m3 as rigid backing material with varying air gap thickness. Thus the composite of 320 kg/m3 density, 30-mm thick when provided with 35-mm air gap and backing material improved the composite’s performance in sound frequency range 250 Hz to 1000 Hz. The overall sound absorption performance was improved and the NRC value and average sound absorption coefficient (SAC) were increased to 0.7 and 0.63 respectively comparable with the commercial acoustic panels made out of the synthetic fibers. We have calculated the sound absorption coefficient values using Delany and Bezlay model (D&B model) and Johnson–Champoux–Allard model (JCA model) and compared them with the measured sound absorption values.

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Wan Maliki, Wan Aiman Hakim, and Muhd Hafeez Zainulabidin. "Ceramic Panel for Sound Insulation Application." JSE Journal of Science and Engineering 1, no. 1 (January 31, 2020): 17–24. http://dx.doi.org/10.30650/jse.v1i1.521.

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In order to reduce noise nowadays, many researcher find different way to solve this problem. One of the ways to reduce noise is by using a sound insulation. This research has been conducted in order to produce high density sound insulation panel made from ceramic. The fabrication of ceramic panel undergo several processes which are milling, mixing, forming, drying and sintering process. The ceramic panel of different types of forming were developed as square plate 110mm x 110 mm with a constant thickness of 5 mm. Type of forming were used for this particular study are slip casting and uniaxial press. The composition used were 100 % clay and 90% + 10 % clay cement. The transmission loss were determined by using acoustic insulation test. The apparatus consists of sound level meter, portable speaker and computer. The Sound Pressure Levels (SPL) were taken at 250 Hz, 500 Hz, 1000 Hz, 2000 Hz and 4000 Hz which based on 1 octave frequency bands. The analysis shown that the sample 90 % + 10 % clay cement casting has the higher transmission loss in the lower frequency region, the sample 90 % + 10 % clay cement uniaxial press has the higher transmission loss in the middle frequency region and lastly the sample 100 % clay uniaxial press has the higher transmission loss in higher frequency region. The sample also were tested using Charpy impact test in order to gain their impact energy and impact strength. The tests were according to ASTM-D256. Charpy impact test can determines the amount of energy absorbed by a material during fracture. The analysis shown that the impact energy of the ceramic panel have a small percentage different. It can be concluded that uniaxial press is better than the slip casting in forming ceramic insulation panel.

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Mano, Hajimu, Hiroshi Kawabe, and Kouji Masaoka. "Sound Transmission of Ship Structural Panel." Journal of the Society of Naval Architects of Japan 1990, no. 168 (1990): 347–54. http://dx.doi.org/10.2534/jjasnaoe1968.1990.168_347.

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Dimino, Ignazio, Pasquale Vitiello, and Ferri Aliabadi. "Sound Transmission Through Triple Panel Partitions." Recent Patents on Mechanical Engineering 6, no. 3 (September 24, 2013): 200–215. http://dx.doi.org/10.2174/22127976113069990007.

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Anderson, Peter L. "Lightweight low profile sound wall panel." Journal of the Acoustical Society of America 101, no. 3 (March 1997): 1221. http://dx.doi.org/10.1121/1.419442.

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Birker, Otto. "Sound absorbing panel for interior walls." Journal of the Acoustical Society of America 91, no. 2 (February 1992): 1192. http://dx.doi.org/10.1121/1.402568.

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Kuroda, Hideyuki. "Panel for constituting sound insulating wall." Journal of the Acoustical Society of America 104, no. 4 (October 1998): 1896. http://dx.doi.org/10.1121/1.424175.

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Shore, Craig. "MULTI-LAYER SOUND ATTENUATING ACOUSTIC PANEL." Journal of the Acoustical Society of America 131, no. 6 (2012): 4863. http://dx.doi.org/10.1121/1.4728378.

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Gandhi, Umesh N. "ADJUSTABLE SOUND PANEL WITH ELECTROACTIVE ACTUATORS." Journal of the Acoustical Society of America 133, no. 5 (2013): 3216. http://dx.doi.org/10.1121/1.4803776.

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Journal articles on the topic 'Sound panel'

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