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Journal articles on the topic 'SONARs (Sound NAvigation and Ranging)'

Author: Grafiati

Published: 4 June 2021

Last updated: 6 September 2023

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1

V Asundi, Ravindra, Anusha L Narayanan, Archana B, Ananya H A, and C. Shrunga Divakara. "Sonar Interface with FCS and Target Detection." International Journal of Engineering & Technology 7, no. 3.12 (2018): 541. http://dx.doi.org/10.14419/ijet.v7i3.12.16175.

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This paper presents a method to interface sound navigation and ranging(SONAR) with fire control system(FCS) and detection of targets. A submarine navigator keeps track of surrounding submarines and active targets such as torpedoes or mines and passive targets such as rocks, friend submarine or a ship, in order to have tactical information of its neighborhood. At present this is carried out manually by trained sonar operator. This task of classifying the object as either mines or rocks by training an artificial neural network using tensor flow framework, thereby giving the submarine (ship) syst

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Satish, Aprameya, Brendan Nichols, David Trivett, and Karim G. Sabra. "Passive underwater acoustic markers for navigation and information encoding for high frequency sound navigation and ranging (SONAR) devices." Journal of the Acoustical Society of America 142, no. 4 (2017): 2731. http://dx.doi.org/10.1121/1.5014975.

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Rahmani, Mohamed Elhadi, Abdelmalek Amine, and Reda Mohamed Hamou. "Sonar Data Classification Using a New Algorithm Inspired from Black Holes Phenomenon." International Journal of Information Retrieval Research 8, no. 2 (2018): 25–39. http://dx.doi.org/10.4018/ijirr.2018040102.

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Sound Navigation and Ranging (Sonar) is underwater sound detection used in boats or submarines to navigate, communicate with or detect objects under the surface of water based on sound propagation. It is helpful for exploring and mapping the ocean because sound waves travel farther in the water than do radar and light waves. Based on signal data obtained from sonar, this article presents a new heuristic approach inspired from black holes' phenomenon proposed by Schwarzschild, it has been applied to the classification sonar returns from two undersea targets, a metal cylinder and a similarly-sha

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Novebriawan, Taufan, Luddy Andreas Delia, Endro Sigit Kurniawan, Kukuh Suryo, and Dikdik Satria Mulyadi. "Purwarupa Peralatan Pencitraan Bawah Laut Dilengkapi Penentu Posisi." Jurnal HIDROPILAR 6, no. 2 (2021): 87–102. http://dx.doi.org/10.37875/hidropilar.v6i2.183.

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Sonar atau Sound Navigation and Ranging adalah teknik yang digunakan untuk menentukan posisi (jarak) menggunakan media gelombang suara. Sonar banyak dipakai untuk mengetahui situasi yang ada di dalam kolom air tertentu. Selain itu sonar juga berguna untuk mengukur jarak serta mencari atau mendeteksi suatu benda yang ada di bawah permukaan laut. Sonar bekerja dengan menggunakan prinsip mengirimkan gelombang suara dan akan dipantulkan kembali ketika gelombang tersebut mengenai suatu objek atau benda. Dalam Tugas Akhir ini penulis bermaksud untuk mengembangkan purwarupa peralatan pencitraan

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Begum, Shaik Salma, Kandipalli Durga Prasanth, Kotapati Lasya Reddy, Kokkiligadda Sai Kumar, and Kancharla Jyotsna Nagasree. "RDNN for Classification and Prediction of Rock or Mine in Underwater Acoustics." International Journal on Recent and Innovation Trends in Computing and Communication 11, no. 3 (2023): 98–104. http://dx.doi.org/10.17762/ijritcc.v11i3.6326.

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Mines in the waters are just explosives that detonate upon contact with an object. The underwater submarine must foresee if it will encounter a mine or a rock. Lacking the development of the Ranging Sound Navigation approach, which utilizes particular variables to identify whether a surface or a barrier is made of a mine or rock, finding mines or rocks would have been extremely difficult. In our study, we demonstrate a technique for predicting underwater rocks and mines using SONAR waves. At 60 different angles, SONAR pings are employed to record the various frequencies of submerged objects. T

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Neupane, Dhiraj, and Jongwon Seok. "A Review on Deep Learning-Based Approaches for Automatic Sonar Target Recognition." Electronics 9, no. 11 (2020): 1972. http://dx.doi.org/10.3390/electronics9111972.

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Underwater acoustics has been implemented mostly in the field of sound navigation and ranging (SONAR) procedures for submarine communication, the examination of maritime assets and environment surveying, target and object recognition, and measurement and study of acoustic sources in the underwater atmosphere. With the rapid development in science and technology, the advancement in sonar systems has increased, resulting in a decrement in underwater casualties. The sonar signal processing and automatic target recognition using sonar signals or imagery is itself a challenging process. Meanwhile,

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Elechi, Promise, Ela Okowa, and Osunomo Procter Illuma. "Analysis of a SONAR Detecting System Using Multi-Beamforming Algorithm." International Journal of Advanced Networking and Applications 14, no. 05 (2023): 5596–601. http://dx.doi.org/10.35444/ijana.2023.14503.

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Sonar (Sound Navigation and Ranging) system is an advanced underwater object-detecting system for navigation. The sonar system aids in detecting obstacles and the presence of enemies within a given range. The sonar system detects the targeted objects by identifying the radius and range of the targeted objects. One of the major problems that affect the application of the sonar system is the inability to detect objects due to excessive echoes and noise in the spectrum. The excessive echoes created reverberations that tend to distort the original reflected signal of the sonar system. This researc

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Salambue, Roni. "PERANCANGAN ALAT PENGUKUR TINGGI BADAN DIGITAL DENGAN METODE SONAR." Rabit : Jurnal Teknologi dan Sistem Informasi Univrab 1, no. 1 (2016): 31–36. http://dx.doi.org/10.36341/rabit.v1i1.14.

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Sonar is an abbreviation of (sound of ranging), which means the technique of spreading the sound for navigation and communicating or detecting other ships. Sonar can be applied to measure the distance of an object by reflecting ultrasonic waves to the object and then captured through the reciver. The ultrasonic wave is reflected by the SR04 sensor and uses Arduino Uno as a microcontroller where its distance is calculated. LCD is used to display measurement results so that it is easier to take height measurements. Arduino is a device that can be programmed and connected directly with an ultraso

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Park, Beom Hoon, Han Bin Choi, Hee-Seon Seo, Yub Je, Hak Yi, and Kwan Kyu Park. "Development of Multilayer Transducer and Omnidirectional Reflection Model for Active Reflection Control." Sensors 23, no. 1 (2023): 521. http://dx.doi.org/10.3390/s23010521.

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Underwater detection is accomplished using an underwater ultrasonic sensor, sound navigation and ranging (SONAR). Stealth to avoid detection by SONAR plays a major role in modern underwater warfare. In this study, we propose a smart skin that avoids detection by SONAR via controlling the signal reflected from an unmanned underwater vehicle (UUV). The smart skin is a multilayer transducer composed of an acoustic window, a double-layer receiver, and a single-layer transmitter. It separates the incident signal from the reflected signal from outside through the time-delay separation method and can

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Jang, Jejin, Jaehyuk Choi, Donghun Lee, and Hyungsoo Mok. "Estimation Method of an Electrical Equivalent Circuit for Sonar Transducer Impedance Characteristic of Multiple Resonance." Sensors 23, no. 14 (2023): 6636. http://dx.doi.org/10.3390/s23146636.

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Improving the operational efficiency and optimizing the design of sound navigation and ranging (sonar) systems require accurate electrical equivalent models within the operating frequency range. The power conversion system within the sonar system increases power efficiency through impedance-matching circuits. Impedance matching is used to enhance the power transmission efficiency of the sonar system. Therefore, to increase the efficiency of the sonar system, an electrical-matching circuit is employed, and this necessitates an accurate equivalent circuit for the sonar transducer within the oper

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N., Mohan Kumar, Vinutha Patil, Varshini P., and Chaitra K. M. "Two dimensional echocardiography as an evidence for clinically significant murmur." International Journal of Contemporary Pediatrics 9, no. 2 (2022): 163. http://dx.doi.org/10.18203/2349-3291.ijcp20220087.

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Background: Heart murmurs are extra and abnormal sounds made by turbulent flow of blood through heart. The most common cardiac abnormality found on auscultation is murmur. Edler is regarded as father of echocardiography. This is based on reflection of sound waves by heart structures similar to the radio detection and ranging (RADAR) and sound navigation and ranging (SONAR).Methods: Our study was done in PICU of Kempegowda Institute of Medical Sciences hospital, Bangalore. Duration of study was 6 years that is from January 2015 to January 2020. During this period total 2304 pediatric cases with

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Sathish, Kaveripakam, Rajesh Anbazhagan, Ravikumar Chinthaginjala Venkata, Fabio Arena, and Giovanni Pau. "Investigation and Numerical Simulation of the Acoustic Target Strength of the Underwater Submarine Vehicle." Inventions 7, no. 4 (2022): 111. http://dx.doi.org/10.3390/inventions7040111.

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Modern weapon systems’ survival hinges on their detection capabilities more than anything else. In the active sonar equation, the acoustic target strength is crucial. Under the assumption of plane wave propagation, the standard target strength equation is used to forecast the reradiated intensity for the far field. The ability of a submarine to remain unnoticed while on patrol or accomplishing a mission is its primary defense. Sonar, sometimes known as sound navigation ranging, is a popular method for locating submarines. This is because saltwater effectively absorbs radio frequencies. Sonar t

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Reitmann, Stefan, Lorenzo Neumann, and Bernhard Jung. "BLAINDER—A Blender AI Add-On for Generation of Semantically Labeled Depth-Sensing Data." Sensors 21, no. 6 (2021): 2144. http://dx.doi.org/10.3390/s21062144.

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Common Machine-Learning (ML) approaches for scene classification require a large amount of training data. However, for classification of depth sensor data, in contrast to image data, relatively few databases are publicly available and manual generation of semantically labeled 3D point clouds is an even more time-consuming task. To simplify the training data generation process for a wide range of domains, we have developed the BLAINDER add-on package for the open-source 3D modeling software Blender, which enables a largely automated generation of semantically annotated point-cloud data in virtu

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Kim, Won-Ki, Ho Seuk Bae, Su-Uk Son, and Joung-Soo Park. "Neural Network-Based Underwater Object Detection off the Coast of the Korean Peninsula." Journal of Marine Science and Engineering 10, no. 10 (2022): 1436. http://dx.doi.org/10.3390/jmse10101436.

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Recently, neural network-based deep learning techniques have been actively applied to detect underwater objects in sonar (sound navigation and ranging) images. However, unlike optical images, acquiring sonar images is extremely time- and cost-intensive, and therefore securing sonar data and conducting related research can be rather challenging. Here, a side-scan sonar was used to obtain sonar images to detect underwater objects off the coast of the Korean Peninsula. For the detection experiments, we used an underwater mock-up model with a similar size, shape, material, and acoustic characteris

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Choi, Jae-Hyuk, and Hyung-Soo Mok. "Simultaneous Design of Low-Pass Filter with Impedance Matching Transformer for SONAR Transducer Using Particle Swarm Optimization." Energies 12, no. 24 (2019): 4646. http://dx.doi.org/10.3390/en12244646.

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Sound navigation and ranging (SONAR) systems detect a target in the front direction by using acoustic signals. A switching-type power conversion system is used to improve power efficiency, and an impedance matching circuit is used to decrease reactive power. A low-pass filter is used to improve the quality of acoustic signals. To achieve the desired voltage level for a SONAR transducer, a transformer is connected in series with a low-pass filter. In conventional design methods, design value errors occur because the components are designed independently and later combined. Moreover, if paramete

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Villalobos, Ricardo, Héctor López, Nimrod Vázquez, Roberto V. Carrillo-Serrano, and Alejandro Espinosa-Calderón. "Cavitation Detection in a Tonpilz-Type Transducer for Active SONAR Transmission System." Journal of Marine Science and Engineering 11, no. 7 (2023): 1279. http://dx.doi.org/10.3390/jmse11071279.

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The active sound navigation and ranging (SONAR) transmission system emits acoustic pulses underwater using a wave generator, a SONAR power amplifier (SPA), and a projector. The acoustic pulse travel in the direction of the target and return as an echo to a hydrophone to learn the range or speed of the object. Often the same device is used as a hydrophone and a projector; in this context, it is known as a transducer. In order to obtain a maximum range of detection in the SONAR, it is desirable to generate the maximum amount of acoustic power until the point in which the echo can be detectable i

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Kim, Min-Kyu, Dong-Jin Park, Yeong-Seok Oh, Jong-Hwa Kim, and Jin-Kyu Choi. "Towfish Attitude Control: A Consideration of Towing Point, Center of Gravity, and Towing Speed." Journal of Marine Science and Engineering 9, no. 6 (2021): 641. http://dx.doi.org/10.3390/jmse9060641.

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This paper deals with the attitude control of a towfish (underwater towed vehicle) with two elevators and a single rudder to improve the image quality of an attached sound navigation ranging (sonar) system. Image distortion can occur if the towfish shakes excessively. Since a towfish is connected to the mother ship through a towing cable and the motion of the towfish is affected not only by the motion of the cable, but also by the position of the center of gravity, towing point, and towing speed, it is necessary to analyze how these factors affect the towfish to appropriately control its attit

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Kamolov, Ahmadhon Akbarkhonovich, and Suhyun Park. "Prediction of Depth of Seawater Using Fuzzy C-Means Clustering Algorithm of Crowdsourced SONAR Data." Sustainability 13, no. 11 (2021): 5823. http://dx.doi.org/10.3390/su13115823.

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Implementing AI in all fields is a solution to the complications that can be troublesome to solve for human beings and will be the key point of the advancement of those spheres. In the marine world, specialists also encounter some problems that can be revealed through addressing AI and machine learning algorithms. One of these challenges is determining the depth of the seabed with high precision. The depth of the seabed is utterly significant in the procedure of ships at sea occupying a safe route. Thus, it is considerably crucial that the ships do not sit in shallow water. In this article, we

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Jin, Meng, Yuqi Bai, Emmanuel Devys, and Liping Di. "Toward a Standardized Encoding of Remote Sensing Geo-Positioning Sensor Models." Remote Sensing 12, no. 9 (2020): 1530. http://dx.doi.org/10.3390/rs12091530.

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Geolocation information is an important feature of remote sensing image data that is captured through a variety of passive or active observation sensors, such as push-broom electro-optical sensor, synthetic aperture radar (SAR), light detection and ranging (LIDAR) and sound navigation and ranging (SONAR). As a fundamental processing step to locate an image, geo-positioning is used to determine the ground coordinates of an object from image coordinates. A variety of sensor models have been created to describe geo-positioning process. In particular, Open Geospatial Consortium (OGC) has defined t

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Razzaq, Huda Saleem, та Zahir M. Hussain. "Instantaneous Frequency Estimation of FM Signals under Gaussian and Symmetric α-Stable Noise: Deep Learning versus Time–Frequency Analysis". Information 14, № 1 (2022): 18. http://dx.doi.org/10.3390/info14010018.

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Deep learning (DL) and machine learning (ML) are widely used in many fields but rarely used in the frequency estimation (FE) and slope estimation (SE) of signals. Frequency and slope estimation for frequency-modulated (FM) and single-tone sinusoidal signals are essential in various applications, such as wireless communications, sound navigation and ranging (SONAR), and radio detection and ranging (RADAR) measurements. This work proposed a novel frequency estimation technique for instantaneous linear FM (LFM) sinusoidal wave using deep learning. Deep neural networks (DNN) and convolutional neur

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Vojinovic, Z., Y. A. Abebe, R. Ranasinghe, et al. "A machine learning approach for estimation of shallow water depths from optical satellite images and sonar measurements." Journal of Hydroinformatics 15, no. 4 (2013): 1408–24. http://dx.doi.org/10.2166/hydro.2013.234.

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There has been a rapid growth in the field of remote sensing and its various applications in the area of water management. Nowadays, there are several remote sensing techniques that can be used as a source to derive bathymetry data along coastal areas. The key techniques are: sonar (sound navigating and ranging), LiDAR (light detection and ranging) and high-resolution satellite images. The present paper describes a method which was developed and used to create a shallow water bathymetry data along the Dutch side of Sint Maarten Island by combining sonar measurements and satellite images in a n

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Schmidt, Henrik. "Environmentally adaptive acoustic communication and navigation for underice autonomous operation." Journal of the Acoustical Society of America 152, no. 4 (2022): A109. http://dx.doi.org/10.1121/10.0015709.

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The Arctic acoustic environment has changed dramatically, with multi-year ice being less abundant and the influx of warmer Pacific water, the so-called “Beaufort Lens,” creating a local maximum in the sound speed at a depth of 50–80 m. In contrast to the classic Arctic sound speed profile which had a monotonic increase in sound speed yielding a surface duct with strong ice interaction, the warm water lens creates a lower duct supporting extremely efficient propagation to long ranges. On the other hand, this double duct environment is decremental to short range communication and navigation of u

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Sivle, Lise Doksæter, Petter Helgevold Kvadsheim, Michael A. Ainslie, et al. "Impact of naval sonar signals on Atlantic herring (Clupea harengus) during summer feeding." ICES Journal of Marine Science 69, no. 6 (2012): 1078–85. http://dx.doi.org/10.1093/icesjms/fss080.

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Abstract Sivle, L. D., Kvadsheim, P. H., Ainslie, M. A., Solow, A., Handegard, N. O. Nordlund, N., and Lam, F-P. A. 2012. Impact of naval sonar signals on Atlantic herring (Clupea harengus) during summer feeding. – ICES Journal of Marine Science, 69: 1078–1085. Naval anti-submarine sonars produce intense sounds within the hearing range of Atlantic herring (Clupea harengus). In this study, schools of Atlantic herring were exposed to sonar signals of 1–2 kHz (low-frequency active sonar, LFAS) and 6–7 kHz (mid-frequency active sonar, MFAS) and playbacks of killer whale feeding sounds during their

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Curé, Charlotte, Saana Isojunno, Marije L. Siemensma, et al. "Severity Scoring of Behavioral Responses of Sperm Whales (Physeter macrocephalus) to Novel Continuous versus Conventional Pulsed Active Sonar." Journal of Marine Science and Engineering 9, no. 4 (2021): 444. http://dx.doi.org/10.3390/jmse9040444.

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Controlled exposure experiments (CEEs) have demonstrated that naval pulsed active sonar (PAS) can induce costly behavioral responses in cetaceans similar to antipredator responses. New generation continuous active sonars (CAS) emit lower amplitude levels but more continuous signals. We conducted CEEs with PAS, CAS and no-sonar control on free-ranging sperm whales in Norway. Two panels blind to experimental conditions concurrently inspected acoustic-and-movement-tag data and visual observations of tagged whales and used an established severity scale (0–9) to assign scores to putative responses.

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Nyeon Kim, Jeong, Tianning Liu, Thomas N. Jackson, et al. "Design and Ultrasonic Characterization of a Thin-Film, Flexible, PMUT Array." AM&P Technical Articles 178, no. 8 (2020): 15–20. http://dx.doi.org/10.31399/asm.amp.2020-08.p015.

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Abstract Ultrasound is widely used for nondestructive evaluation, structural health monitoring, acoustic emission, sound navigation ranging, and in sensors for automobiles, medicine, and many other applications. Next-generation, small-form-factor sensors have been achieved through advances in piezoelectric micromachined ultrasonic transducers (PMUTs) that can be positioned on either a flexible polymer or a silicon substrate to form an array. This article describes a materials and design optimization study that used finite element analyses to improve designs for robust and practical PMUT sensor

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Kapoor, Rohan, Alessandro Gardi, and Roberto Sabatini. "Network Optimisation and Performance Analysis of a Multistatic Acoustic Navigation Sensor." Sensors 20, no. 19 (2020): 5718. http://dx.doi.org/10.3390/s20195718.

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This paper addresses some of the existing research gaps in the practical use of acoustic waves for navigation of autonomous air and surface vehicles. After providing a characterisation of ultrasonic transducers, a multistatic sensor arrangement is discussed, with multiple transmitters broadcasting their respective signals in a round-robin fashion, following a time division multiple access (TDMA) scheme. In particular, an optimisation methodology for the placement of transmitters in a given test volume is presented with the objective of minimizing the position dilution of precision (PDOP) and m

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Bhatt, EeShan, Robert A. Weller, and Arthur B. Baggeroer. "Evaluating the impact of intermediate and deep sound speed uncertainty in the Irminger Sea on acoustic situational awareness." Journal of the Acoustical Society of America 152, no. 4 (2022): A200. http://dx.doi.org/10.1121/10.0016024.

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High-resolution observations from moorings and transect data can provide new insights into ocean structures, their variability, and the downstream effects on acoustic operations. Previously, we established a framework to maintain optimal communication and navigation for small-scale, under-ice operations that focused on spatio-temporal variability in the upper water column and around an autonomous underwater vehicle. However, mid- and deep-water sound speed fidelity are crucial for larger operations that exploit convergence zone ranging. The Irminger Sea is a useful case study for understanding

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Сорокин, М. А., П. С. Петров, Д. Д. Каплуненко, Д. В. Степанов, and Ю. Н. Моргунов. "ESTIMATION OF THE SYNOPTIC EDDIES INFLUENCE ON THE ACOUSTIC RANGING ACCURACY." Podvodnye issledovaniia i robototehnika, no. 4(34) (January 24, 2020): 53–60. http://dx.doi.org/10.37102/24094609.2020.34.4.007.

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Разработка систем акустической навигации и акустической дальнометрии в настоящее время является одной из наиболее актуальных практических задач акустики океана. В работе исследуется вопрос о влиянии крупномасштабных неоднородностей поля скорости звука в океане на точность решения задачи акустической дальнометрии. В качестве примера такой неоднородности нами выбран устойчивый антициклонический вихрь, наблюдающийся в южной части Японского моря в летний период. В работе проведены вычислительные эксперименты по исследованию влияния этого вихря на структуру звукового поля, формируемого на акустичес

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Ramesh, Raju, Dharmaraj Sathianarayanan, Vittal Doss Prakash, et al. "Failure Analysis of Fiber Optic Communication System in Deep-Water Remotely Operated Vehicle ROSUB 6000." Marine Technology Society Journal 48, no. 3 (2014): 63–72. http://dx.doi.org/10.4031/mtsj.48.3.11.

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AbstractSingle-mode fiber optic systems can play vital roles in cabled deep-water vehicle operations at greater depths (>3,000 m). One kind of single-mode fiber optic system, the ROSUB 6000, is used in a deep-water work-class remotely operated vehicle (ROV). Fiber optic link failure of ROV telemetry and sound navigation and ranging were noticed at a water depth of 3,050 m during the ROSUB 6000 system sea trials. A failure analysis of the fiber optic communication system was carried out with the link data logged during different phases of the deep-sea trials. The results from the failure ana

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"Designing of Low Cost Arduino Based Ultrasonic SONAR System." VFAST Transactions on Software Engineering, November 1, 2017, 57–65. http://dx.doi.org/10.21015/vtse.v12i3.505.

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Sonar (Sound Navigation and Ranging) was covertly created by few countries during the reign of World War II. SONAR can be used to detect some moving object. It helps in the measurement of distance and angle from the observer. It works on the principle of Doppler shift. The designing of cheaper SONAR system for security purpose is the requirement of an industry. In this research Paper, the designing and implementation of Arduino based SONAR system using ultrasonic sensor are presented. The device is able to detect the object, calculate its distance (up to 30cm) and can determine the elevation a

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Giraldo E., Carlos. "Principios básicos de ultrasonografía veterinaria." Revista MVZ Córdoba, July 1, 2003. http://dx.doi.org/10.21897/rmvz.508.

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La tecnología del ultrasonido nace en 1880 con el desarrollo de los efectos piezoeléctricos. Luego fue aplicada en forma de SONAR (Sound Navigation and Ranging) durante la segunda guerra mundial para la detección de barcos, submarinos y aviones de guerra. La emisión de las ondas de ultrasonido se obtiene por medio de cristales que son sometidos a una corriente eléctrica logrando que vibren, la recepción de éstas ondas se logra cuando retornan de nuevo a los cristales al chocar con los tejidos. Estos cristales están contenidos en dispositivos llamados transductores o sondas ecográficas conectad

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Bowers, Gerald M. "Military Contributions to the Field of Medical Ultrasound." Military Medicine, August 29, 2022. http://dx.doi.org/10.1093/milmed/usac262.

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ABSTRACT Medical ultrasound is based on the same principle of the piezoelectric effect as sound navigation and ranging, used by the world’s navies and maritime industry. Many of the early advances in sound navigation and ranging technology influenced landmark discoveries in diagnostic ultrasound made by military officers and defense department researchers.

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Shiga, John. "Sonar: Empire, Media, and the Politics of Underwater Sound." Canadian Journal of Communication 38, no. 3 (2013). http://dx.doi.org/10.22230/cjc.2013v38n3a2664.

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This article traces the development of acoustic navigation media, or “sonar,” in the first half of the twentieth century, focusing on the relationships forged between underwater sound, electric media, and new techniques of listening. The central argument is that sonar shaped, and was shaped by, the expansion of warfare and capital underwater, and that this expansion came to be conceptualized by nautical organizations as dependent upon the control of underwater sound. Through analysis of key episodes in the conquest of subsea space, the author explores scientific, military, and commercial effor

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Rimsky-Korsakov, N. A., S. A. Sviridov, Yu S. Russak, A. B. Kostin, and N. F. Tikhonova. "DEVELOPMENT AND OPERATION OF DEEP-SEA OCEANOGRAPHIC COMPLEX AS PART OF TOWED VEHICLES “ZVUK”." Journal of Oceanological Research, April 10, 2023, 133–61. http://dx.doi.org/10.29006/1564-2291.jor-2023.51(1).7.

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The article presents a technical review on the development of deep-sea complex with a working depth of immersion and towing of 6000 m in the 1980s at the Shirshov Institute of Oceanology of the USSR Academy of Sciences. The complex was devoted to studies of the bottom surface and underwater objects in the interests of the Hydrographic Service of the Russian Navy. The complex consists of two towed uninhabited underwater vehicles “Sound-Complex” and “SoundMAFT”. A special hydrographic vessel with a displacement of 2600 tons was converted for deep-sea towing and storage of these devices. Computer

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Watanabe, Shun-ichi, Tadashi Ishikawa, Yusuke Yokota, and Yuto Nakamura. "GARPOS: Analysis Software for the GNSS‐A Seafloor Positioning With Simultaneous Estimation of Sound Speed Structure." Frontiers in Earth Science 8 (November 20, 2020). http://dx.doi.org/10.3389/feart.2020.597532.

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Global Navigation Satellite System–Acoustic ranging combined seafloor geodetic technique (GNSS-A) has extended the geodetic observation network into the ocean. The key issue for analyzing the GNSS-A data is how to correct the effect of sound speed variation in the seawater. We constructed a generalized observation equation and developed a method to directly extract the gradient sound speed structure by introducing appropriate statistical properties in the observation equation, especially the data correlation term. In the proposed scheme, we calculate the posterior probability based on the empi

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Tomita, Fumiaki, Motoyuki Kido, Chie Honsho, and Ryo Matsui. "Development of a kinematic GNSS-Acoustic positioning method based on a state-space model." Earth, Planets and Space 71, no. 1 (2019). http://dx.doi.org/10.1186/s40623-019-1082-y.

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Abstract GNSS-A (combination of Global Navigation Satellite System and Acoustic ranging) observations have provided important geophysical results, typically based on static GNSS-Acoustic positioning methods. Recently, continuous GNSS-Acoustic observations using a moored buoy have been attempted. Precise kinematic GNSS-Acoustic positioning is essential for these approaches. In this study, we developed a new kinematic GNSS-A positioning method using the extended Kalman filter (EKF). As for the observation model, parameters expressing underwater sound speed structure [nadir total delay (NTD) and

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Merkens, Karlina, Simone Baumann-Pickering, Morgan A. Ziegenhorn, Jennifer S. Trickey, Ann N. Allen, and Erin M. Oleson. "Characterizing the Long-Term, Wide-Band and Deep-Water Soundscape Off Hawai’i." Frontiers in Marine Science 8 (November 15, 2021). http://dx.doi.org/10.3389/fmars.2021.752231.

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Many animals use sound for communication, navigation, and foraging, particularly in deep water or at night when light is limited, so describing the soundscape is essential for understanding, protecting, and managing these species and their environments. The nearshore deep-water acoustic environment off the coast of Kona, Hawai’i, is not well documented but is expected to be strongly influenced by anthropogenic activities such as fishing, tourism, and other vessel activity. To characterize the deep-water soundscape in this area we used High-frequency Acoustic Recording Packages (HARPs) to recor

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