Richard Dréo, Wayne C Crawford, Guilhem Barruol, Sara Bazin, Jean-Yves Royer, Flore Samaran
{"title":"Singing around the volcano: Detecting baleen whales in the Mozambique channel based on their song rhythms, from seismic and hydroacoustic data.","authors":"Richard Dréo, Wayne C Crawford, Guilhem Barruol, Sara Bazin, Jean-Yves Royer, Flore Samaran","doi":"10.1121/10.0036510","DOIUrl":"https://doi.org/10.1121/10.0036510","url":null,"abstract":"<p><p>Since March 2019 and October 2020, two long-term submarine networks-comprising ocean bottom seismometers and water-column hydrophones-have been deployed in the northern Mozambique Channel (Western Indian Ocean) to monitor the seismo-volcanic crisis that began offshore Mayotte in 2018. These deployments provide a valuable multi-year dataset for environmental monitoring in this remote region, including seasonal variations in the presence of baleen whales. To analyze these patterns, we developed an automated detector for stereotyped and regular signals, focusing on the characteristic inter-call intervals of each whale species, independently of the song structure. The detector's simplicity makes it computationally efficient and easily adaptable to species vocalizing in the 15-100 Hz frequency range over extended periods. Analysis of nearly six years of continuous seismo-acoustic data highlights the seasonal presence of Antarctic blue whales (May-August), Southwest Indian Ocean pygmy blue whales (bi-modal pattern from April-August and October-January), minke whales (June-December), and fin whales (July-November), and highlights the potential variability over years. Our results enhance and refine our understanding of the seasonal migration patterns of whale populations in this specific area of the Western Indian Ocean.</p>","PeriodicalId":17168,"journal":{"name":"Journal of the Acoustical Society of America","volume":"157 5","pages":"3418-3435"},"PeriodicalIF":2.1,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144001321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Topology optimization of multi-material underwater broadband sound absorption metamaterial based on genetic algorithm.","authors":"Feifei Feng, Chuan He, Zixian Cui, Tong Ying, Jingyong Cai, Meng Tao","doi":"10.1121/10.0036637","DOIUrl":"https://doi.org/10.1121/10.0036637","url":null,"abstract":"<p><p>Combining multiple sound energy dissipation mechanisms is essential for improving the sound absorption performance of underwater acoustic metamaterials. The calculation of absorption coefficients of the acoustic structures uses the finite element method, and the hexagonal unit is approximated to a two-dimensional axial symmetry unit. Genetic algorithms and topology optimization methods are combined to design the microstructure of acoustic metamaterials. The rubber, air, and scatterer are taken as optimized materials for microstructure to find the optimal material distribution within the metamaterial. A data filtering method is proposed to eliminate the checkerboard phenomenon. The sound absorption mechanism of the topology structure is analyzed. The advantages of the three-phase material topology structure are revealed by comparing it with two-phase material topology structures. The influences of material parameters, structural parameters, and incident angles on sound absorption performance are studied. The results showed that the average sound absorption coefficient of the optimal topology structure is 0.9574 in the frequency range of 500-10 000 Hz. The material parameters of rubber have no obvious effect on sound absorption performance, which is convenient for selecting matrix materials. The research method provides some ideas for designing low-frequency broadband underwater acoustic metamaterials with multiphase materials.</p>","PeriodicalId":17168,"journal":{"name":"Journal of the Acoustical Society of America","volume":"157 5","pages":"3482-3496"},"PeriodicalIF":2.1,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143998775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Forward masking of amplitude modulation: Sensory versus perceptual components.","authors":"Christopher Conroy, Andrew J Byrne, Gerald Kidd","doi":"10.1121/10.0036534","DOIUrl":"https://doi.org/10.1121/10.0036534","url":null,"abstract":"<p><p>Previous findings suggest that forward masking in the amplitude-modulation (AM) domain includes both sensory and perceptual components. The sensory component reflects masking associated with AM-rate-selective neural channels, whereas the perceptual component reflects masking associated with perceived target-masker similarity. In this article, it is shown that AM forward masking can be substantially reduced or even eliminated by reducing perceived target-masker similarity. It is suggested, therefore, that, under certain conditions, AM forward masking includes, at most, a weak sensory component along with a stronger perceptual component related to perceived target-masker similarity. This complicates interpretations of AM forward masking that rely on AM-rate-selective neural channels.</p>","PeriodicalId":17168,"journal":{"name":"Journal of the Acoustical Society of America","volume":"157 5","pages":"3322-3328"},"PeriodicalIF":2.1,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12049236/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143998556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Angle sub-sampling methods for enhanced ultrasound coherent plane wave compounding.","authors":"Mina Ezati, Zahra Kavehvash","doi":"10.1121/10.0036536","DOIUrl":"https://doi.org/10.1121/10.0036536","url":null,"abstract":"<p><p>Coherent plane wave compounding ultrasound imaging combines low-resolution frames acquired from multiple angles to generate a high-quality image. However, achieving an optimal balance between frame rate and image quality is challenging, as increasing the number of emission angles leads to a reduction in frame rate. In scenarios with sub-sampled angles, selecting an optimal subset of angles becomes crucial to minimizing data acquisition time while preserving image quality comparable to all-angle transmission. To address this challenge, we propose two methods: Coprime sub-sampled angle (CSA) and semi sub-sampled angle (SSA). These approaches strategically select two subsets of angles to effectively suppress grating lobes resulting from down-sampling in the transmission angle intervals. Unlike traditional methods like random or periodic subsampling, CSA and SSA offer controlled and robust suppression of grating lobes while maintaining image quality, making them ideal for sub-sampled angle configurations. Our validation with the Plane-wave Imaging Challenge in Medical Ultrasound dataset shows that CSA achieves comparable resolution with an 8.4% contrast ratio improvement using only 25.3% of all available angles. Meanwhile, SSA achieves similar resolution with a 7.7% contrast gain, using 36% of the angles, while effectively preserving speckle quality.</p>","PeriodicalId":17168,"journal":{"name":"Journal of the Acoustical Society of America","volume":"157 5","pages":"3329-3344"},"PeriodicalIF":2.1,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143978347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The Wenz curves for underwater ambient sound.","authors":"Grant B Deane","doi":"10.1121/10.0036690","DOIUrl":"https://doi.org/10.1121/10.0036690","url":null,"abstract":"<p><p>The Reflections series takes a look back on historical articles from The Journal of the Acoustical Society of America that have had a significant impact on the science and practice of acoustics.</p>","PeriodicalId":17168,"journal":{"name":"Journal of the Acoustical Society of America","volume":"157 5","pages":"R9-R10"},"PeriodicalIF":2.1,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143971166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Synthetic head-wave correlations from ocean ambient noise on a drifting vertical line array.","authors":"Jie Li, Peter Gerstoft, Martin Siderius","doi":"10.1121/10.0036533","DOIUrl":"https://doi.org/10.1121/10.0036533","url":null,"abstract":"<p><p>Head-wave correlations from ocean surface noise have been identified through simulations and experiments using vertical and horizontal arrays. Previous studies have shown that most head-wave correlations were derived from averaging only a few minutes of surface noise, with the receiving array effectively in a fixed position. However, whether these \"weak\" head-wave correlations can be observed at different locations and times, and under what conditions they occur, remains uncertain. This study analyzes head-wave correlations at four representative time points with varying surface noise power levels, synthetic head-wave correlations at the water-sediment critical angle, and passive fathometer returns over a 13-h drift (6 km) using BOUNDARY2003 data from a vertical line array. The presence of these signal types depends on the energy of stationary phase noise sources, which varies with frequency and time, as shown by conventional beamforming output. Synthetic head-wave correlations originating from the water-sediment interface are detected along nearly the entire drift track, with frequency-dependent variations noted. The robustness of synthetic head-wave correlations offers an effective method for estimating waveguide and geoacoustic parameters over large areas, significantly enhancing environmental characterization efforts.</p>","PeriodicalId":17168,"journal":{"name":"Journal of the Acoustical Society of America","volume":"157 5","pages":"3220-3231"},"PeriodicalIF":2.1,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143988535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jihoon Ahn, Danial Panahandeh-Shahraki, Gunho Kim, Chiara Daraio
{"title":"Inflatable acoustic metasurfaces for tunable wave focusinga).","authors":"Jihoon Ahn, Danial Panahandeh-Shahraki, Gunho Kim, Chiara Daraio","doi":"10.1121/10.0036567","DOIUrl":"https://doi.org/10.1121/10.0036567","url":null,"abstract":"<p><p>Acoustic metasurfaces are two-dimensional architected materials designed to enable non-trivial control of waves, with a thickness that is either thinner than or comparable to the wavelength. However, most metasurfaces today have a fixed geometry and lack the ability to tune acoustic waves on command. This limits their ability to perform multiple functions, such as beam steering and dynamic focusing. This study introduces inflatable acoustic metasurface (IAM) lenses that enable tunable focusing. The IAMs feature two-dimensional diffractive focusing patterns embedded in a membrane that can be inflated nonplanarly through hydraulic control. It is experimentally demonstrated that inflation allows continuous focal length adjustment from -2.49λ to +3.17λ. To characterize the lens performance, changes in focal characteristics, including peak pressure, full width at half-maximum, and full length at half-maximum, are tracked at different levels of inflation. Furthermore, it is shown that IAMs can correct aberrations that occur as the angle of incidence increases in conventional planar lenses. To validate this, IAMs were tested in a concave configuration at a 20° oblique incidence angle. The results of this study may be applicable to fields requiring continuous and real-time response in tunable focusing, including acoustic imaging and communication, ultrasound surgery, and neuromodulation.</p>","PeriodicalId":17168,"journal":{"name":"Journal of the Acoustical Society of America","volume":"157 5","pages":"3286-3295"},"PeriodicalIF":2.1,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143989137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pierre Goislot, Guillemette Ribay, Emmanuel Moulin, Lynda Chehami
{"title":"Sparse guided wave imaging in highly anisotropic plates with phase skewing and amplitude focusing compensation.","authors":"Pierre Goislot, Guillemette Ribay, Emmanuel Moulin, Lynda Chehami","doi":"10.1121/10.0036595","DOIUrl":"https://doi.org/10.1121/10.0036595","url":null,"abstract":"<p><p>This paper introduces a sparse beamforming algorithm designed to compensate for guided wave dispersion while addressing phase skewing and energy focusing in highly anisotropic composite plates. Developed for structural health monitoring, this algorithm targets impact-induced defects, such as barely visible impact damages (BVIDs), using a limited number of arbitrarily positioned transducers. Validation is first performed on finite element simulated data with the A0 mode in an eight-ply unidirectional composite with significant anisotropy and a delamination defect, highlighting the critical role of phase skewing compensation. Additionally, energy focusing compensation strategies are introduced, improving image contrast in highly anisotropic materials. Experimental validation is carried out on a real BVID caused by a 6.3 J impact on an aerospace-grade composite plate and compared to a simulation with a similar size delamination. Results show good agreement between experiments and simulations, with significant enhancements in imaging resolution when considering dispersion compensation compared to the commonly used delay-and-sum algorithm. The proposed algorithm improves image dynamics and reduces focal spot area by a factor of more than 100. Finally, the study quantifies errors introduced by neglecting phase skewing in dispersion compensation, demonstrating coherence with observed imaging results for both composite materials studied in this paper.</p>","PeriodicalId":17168,"journal":{"name":"Journal of the Acoustical Society of America","volume":"157 5","pages":"3390-3401"},"PeriodicalIF":2.1,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144031692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Irène Mopin, Gilles Le Chenadec, Michel Legris, Philippe Blondel, Benoît Zerr, Jacques Marchal
{"title":"Linking deterministic and stochastic aspects of the seafloor's acoustic response in the context of seabed mapping with echosounders.","authors":"Irène Mopin, Gilles Le Chenadec, Michel Legris, Philippe Blondel, Benoît Zerr, Jacques Marchal","doi":"10.1121/10.0036569","DOIUrl":"https://doi.org/10.1121/10.0036569","url":null,"abstract":"<p><p>In the different contexts where the monostatic acoustic seafloor response (ASR) is employed (i.e., measurements with multibeam or singlebeam echosounders, applications in seabed mapping, theoretical models with physical or heuristic parameters), its intrinsic nature can be ambiguous. In this article, an analysis of the discrepancies in semantics is proposed, and then the ASR theoretical and physical definitions are recalled. In theoretical models, and while it is acquired at sea, the ASR is shown to be considered as a deterministic parameter. However, a large variability in its measurements with echosounders is observed, suggesting ASR to be physically a stochastic variable. These two seemingly contradictory observations are linked analytically based on a point scattering model. The theoretical and deterministic ASR is related to its stochastic measurements as the expected value. Based on this connection and under the hypotheses of seafloor homogeneity and large insonified areas, the monostatic ASR measured by echosounders (i.e., the backscattering strength) is derived as twice the parameter of the Rayleigh distribution. Relationships between this result and seabed characteristics are discussed, along with their implications for echosounder operations.</p>","PeriodicalId":17168,"journal":{"name":"Journal of the Acoustical Society of America","volume":"157 5","pages":"3524-3537"},"PeriodicalIF":2.1,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144006087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lily Cassandra Paulick, Helia Relaño-Iborra, Torsten Dau
{"title":"The computational auditory signal processing and perception model: A revised version.","authors":"Lily Cassandra Paulick, Helia Relaño-Iborra, Torsten Dau","doi":"10.1121/10.0036535","DOIUrl":"https://doi.org/10.1121/10.0036535","url":null,"abstract":"<p><p>This study integrates a non-linear inner hair cell model (IHC) into the computational auditory signal processing and perception (CASP) model [Jepsen, Ewert, and Dau (2008). J. Acoust. Am. 124(1), 422-438]. The integration addresses limitations of its more simplistic predecessor that did not reflect the saturation of the IHC transduction process towards high sound pressure levels. While exhibiting distinct processing mechanisms compared to the original model, the revised model maintains predictive power across conditions of intensity discrimination, simultaneous and forward masking, and modulation detection, effectively accounting for data from normal-hearing listeners. Additional updates and refinements to the model are introduced in response to the changes produced by the additional compressive non-linearity and to improve its usability. Overall, the revised CASP model offers a more accurate and intuitive framework for simulating auditory processing and perception under diverse conditions and tasks. This enhanced version may be particularly valuable for studying the influence of the ear's nonlinear response properties on internal auditory representations, including the effects of sensorineural hearing loss on auditory perception.</p>","PeriodicalId":17168,"journal":{"name":"Journal of the Acoustical Society of America","volume":"157 5","pages":"3232-3244"},"PeriodicalIF":2.1,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143974682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}