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Low frequency ambient noise dynamics and trends in the Indian Ocean, Cape Leeuwin, Australia J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-04-17 Joseph Park, Georgios Haralabus, Mario Zampolli, Dirk Metz
Examination of 18 years of nearly continuous low frequency deep ocean ambient noise offshore Cape Leeuwin, Australia, finds evidence of a decreasing nonlinear trend suggestive of long-term cyclic dynamics. The nonlinear trend is found to be consistent with trends in oceanographic sea surface temperature, which are thought to drive changes in Antarctic sea ice extent. Assessment of oscillatory dynamics
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Age-related reduction of amplitude modulation frequency selectivity J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-04-17 Jonathan Regev, Johannes Zaar, Helia Relaño-Iborra, Torsten Dau
The perception of amplitude modulations (AMs) has been characterized by a frequency-selective process in the temporal envelope domain and simulated in computational auditory processing and perception models using a modulation filterbank. Such AM frequency-selective processing has been argued to be critical for the perception of complex sounds, including speech. This study aimed at investigating the
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Intra- and inter-speaker variation in eight Russian fricatives J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-04-17 Natalja Ulrich, François Pellegrino, Marc Allassonnière-Tang
Acoustic variation is central to the study of speaker characterization. In this respect, specific phonemic classes such as vowels have been particularly studied, compared to fricatives. Fricatives exhibit important aperiodic energy, which can extend over a high-frequency range beyond that conventionally considered in phonetic analyses, often limited up to 12 kHz. We adopt here an extended frequency
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A numerical investigation of passive acoustic mapping for monitoring bubble-mediated focused ultrasound treatment of the spinal cord J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-04-13 Andrew Paul Frizado, Meaghan Anne O'Reilly
Focused ultrasound (FUS) combined with intravenous microbubbles (MBs) has been shown to increase drug delivery to the spinal cord in animal models. Eventual clinical translation of such a technique in the sensitive spinal cord requires robust treatment monitoring to ensure efficacy, localization, safety, and provide key intraprocedural feedback. Here, the use of passive acoustic mapping (PAM) of MB
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A characteristic nonlinear distortion length for broadband Gaussian noise J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-04-13 Michael B. Muhlestein, Kent L. Gee
The nonlinear evolution of high-amplitude broadband noise is important to the psychoacoustic perception, usually annoyance, of high-speed jet noise. One method to characterize the nonlinear evolution of such noise is to consider a characteristic nonlinear waveform distortion length for the signal. A common length scale for this analysis is the shock formation distance of an initially sinusoidal signal
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Estimating cochlear impulse responses using frequency sweeps J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-04-13 Karolina K. Charaziak, Alessandro Altoè
Cochlear mechanics tends to be studied using single-location measurements of intracochlear vibrations in response to acoustical stimuli. Such measurements, due to their invasiveness and often the instability of the animal preparation, are difficult to accomplish and, thus, ideally require stimulus paradigms that are time efficient, flexible, and result in high resolution transfer functions. Here, a
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Variability in humpback whale songs reveals how individuals can be distinctive when sharing a complex vocal display J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-04-12 Luca Lamoni, Ellen C. Garland, Jenny A. Allen, Jennifer Coxon, Michael J. Noad, Luke Rendell
Individually distinctive acoustic signals in animal vocal communication are taxonomically widespread, however, the investigation of these signal types in marine mammals has focused only on a few species. Humpback whale songs are a stereotyped, hierarchically structured vocal display performed by males, and hence thought to be sexually selected. Within a population, whales conform to a common version
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Localization of a remote source in a noisy deep ocean sound channel using phase-only matched autoproduct processing J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-04-12 David J. Geroski, Jay R. Johnson, David R. Dowling
Long-range passive source localization is possible in the deep ocean using phase-only matched autoproduct processing (POMAP) [Geroski and Dowling (2021). J. Acoust. Soc. Am. 150, 171–182], an algorithm based on matched field processing that is more robust to environmental mismatch. This paper extends these prior POMAP results by analyzing the localization performance of this algorithm in the presence
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Computation of ultrasound propagation in a population of nonlinearly oscillating microbubbles including multiple scattering J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-04-11 A. Matalliotakis, M. D. Verweij
In contrast-enhanced echography, the simulation of nonlinear propagation of ultrasound through a population of oscillating microbubbles imposes a computational challenge. Also, the numerical complexity increases because each scatterer has individual properties. To address these problems, the Iterative Nonlinear Contrast Source (INCS) method has been extended to include a large population of nonlinearly
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Equations for finite-difference, time-domain simulation of sound propagation in moving media with arbitrary Mach numbers J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-04-10 Vladimir E. Ostashev, Timothy Van Renterghem
Finite-difference time-domain (FDTD) techniques for sound propagation have become increasingly popular. In moving media, such as the atmosphere, starting equations for FDTD calculations are often limited to low Mach numbers, which may result in significant errors. In this article, two coupled equations for the sound pressure and acoustic particle velocity are derived from the linearized fluid dynamic
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Shortened neural conduction time in young adults with tinnitus as revealed by chirp-evoked auditory brainstem response J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-04-10 See Ling Tan, Yu-Fu Chen, Chieh-Yu Liu, Kuo-Chung Chu, Pei-Chun Li
Tinnitus is generally considered to be caused by neuroplastic changes in the central nervous system, triggered by a loss of input from the damaged peripheral system; however, conflicting results on auditory brainstem responses (ABRs) to clicks have been reported previously in humans with tinnitus. This study aimed to compare the effect of tinnitus on ABRs to chirps with those to clicks in normal-hearing
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Detection and localization of Goliath grouper using their low-frequency pulse sounds J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-04-10 Ali Salem Altaher, Hanqi Zhuang, Ali K. Ibrahim, Ali Muhamed Ali, Ahmed Altaher, James Locascio, Michael P. McCallister, Matthew J. Ajemian, Laurent M. Chérubin
The goal of this paper is to implement and deploy an automated detector and localization model to locate underwater marine organisms using their low-frequency pulse sounds. This model is based on time difference of arrival (TDOA) and uses a two-stage approach, first, to identify the sound and, second, to localize it. In the first stage, an adaptive matched filter (MF) is designed and implemented to
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Speaking in the presence of noise: Consistency of acoustic properties in clear-Lombard speech over time J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-04-10 Chen Shen, Martin Cooke, Esther Janse
Individual speakers are often able to modify their speech to facilitate communication in challenging conditions, such as speaking in a noisy environment. Such vocal “enrichments” might include reductions in speech rate or increases in acoustic contrasts. However, it is unclear how consistently speakers enrich their speech over time. This study examined inter-speaker variability in the speech enrichment
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Illustration of diffusion and equipartitioning as local processes: A numerical study using the scalar radiative transfer equation J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-04-07 Manuel Jaimes, Roel Snieder
We study the transition from ballistic to diffusive to equipartitioned waves in scattering media using the acoustic radiative transfer equation. To solve this equation, we first transform it into an integral equation for the specific intensity and then construct a time stepping algorithm with which we evolve the specific intensity numerically in time. We handle the advection of energy analytically
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Time domain response of a piezoelectric layer J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-04-07 John Y. Yoritomo, Benjamin R. Dzikowicz, James F. Tressler
A number of one-dimensional models have been developed to inform the design of piezoelectric transducers. The majority of these models are in the frequency domain. In this paper, we develop a one-dimensional time-domain model for the mechanical response of a piezoelectric layer. Secondary effects, resulting from feedback between the acoustic and electric variables, are included in the model. Our approach
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Active control of airfoil turbulent boundary layer noise with trailing-edge blowing J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-04-07 Chenghao Yang, Elias J. G. Arcondoulis, Yannian Yang, Jing Guo, Reza Maryami, Chuanxing Bi, Yu Liu
Large Eddy Simulation (LES) and Ffowcs Williams-Hawkings acoustic analogy are performed to study the effect of trailing-edge blowing on airfoil self-noise. Simulations were conducted using a National Advisory Committee for Aeronautics 0012 airfoil at zero angle of attack and a chord-based Reynolds number of 4×105. The aerodynamic and aeroacoustic characteristics of the baseline airfoil were thoroughly
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Difference frequency coherent matched autoproduct processing for source localization in deep ocean J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-04-07 Ze Yuan, Haiqiang Niu, Zhenglin Li, Wenyu Luo
Matched autoproduct processing (MAP) refers to a matched field processing (MFP) style array signal processing technique for passive source localization, which interrogates frequency-difference autoproduct instead of genuine acoustic pressure. Due to frequency downshifting, MAP is less sensitive to environmental mismatch, but it suffers from low spatial resolution and a low peak-to-sidelobe ratio of
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Determining longitudinal and transverse elastic wave attenuation from zero-group-velocity Lamb waves in a pair of plates J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-04-06 Martin Ryzy, István Veres, Thomas Berer, Michael Salfinger, Susanne Kreuzer, Guqi Yan, Edgar Scherleitner, Clemens Grünsteidl
A method for the determination of longitudinal and transverse bulk acoustic wave attenuation from measurements of the decay-rate of two independent zero-group-velocity resonances in a couple of matched plates is presented. A linear relation is derived, which links the bulk-wave attenuation coefficients to the decay-rate of plate-resonances. The relation is used to determine the acoustic loss of tungsten
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Passive synthetic aperture for direction-of-arrival estimation using sparse Bayesian learning J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-04-06 Chao Ming, Haiqiang Niu, Zhenglin Li, Yu Wang
Passive synthetic aperture (PSA) extension for a moving array has the ability to enhance the accuracy of direction-of-arrival (DOA) estimation by constructing a larger virtual aperture. The array element overlap in array continuous measurements is required for the traditional extended towed array measurement (ETAM) methods. Otherwise, the phase factor estimation is biased, and the aperture extension
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Deconvolution with neural grid compression: A method to accurately and quickly process beamforming results J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-04-06 Thiago Lobato, Roland Sottek, Michael Vorländer
Beamforming results depend on the spatial resolution of the microphone array used, which may lead to sources close to each other being considered as one. Deconvolution methods that consider all directions simultaneously, such as DAMAS, produce better results in these situations. However, they have a high computational cost, often lack sufficient speed to be used in real-time applications, and have
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Guided wave propagation and skew effects in anisotropic carbon fiber reinforced laminates J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-04-06 Flora Hervin, Paul Fromme
Guided ultrasonic waves provide a promising structural health monitoring (SHM) solution for composite structures as they are able to propagate relatively long distances with low attenuation. However, the material anisotropy results in directionally dependent phase and group velocities, in addition to energy focusing, wave skewing, and beam spreading phenomena. These effects could lead to inaccurate
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REVIEWS OF ACOUSTICAL PATENTS J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-04-03 Sean A. Fulop
The purpose of these acoustical patent reviews is to provide enough information for a Journal reader to decide whether to seek more information from the patent itself. Any opinions expressed here are those of the reviewers as individuals and are not legal opinions. Patents are available via the internet at the USPTO website.
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Multichannel room response equalization with a broadened control region using a linearly constrained approach and sensor interpolation J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-04-03 Wei-Ling Lin, You-Siang Chen, Bo-Ru Lai, Mingsian R. Bai
This paper describes a room response equalization technique based on an underdetermined multichannel inverse filtering (UMIF) and linearly constrained minimum variance (LCMV) approach. Not limited to the local control at the neighborhood of the measured control points, the proposed UMIF-LCMV system is capable of widening the effective equalization area of the reproduced sound field, with a large number
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Analyzing multiple acoustic diffraction over a wide barrier using equivalent knife-edge geometries and Babinet's principle (L) J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-04-03 Domingo Pardo-Quiles, Ignacio Rodríguez-Rodríguez, José-Víctor Rodríguez, María Campo-Valera, Leandro Juan-Llácer
We present a new method for the calculation of the multiple acoustic diffraction caused by the presence of a wide barrier. Our solution decomposes the initial scenario into an equivalent sum of geometries that only consider knife-edges. Then, by applying Babinet's principle, the total acoustic field that reaches the receiving point, which can be located at an arbitrary position, can be calculated via
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High-order time lacunarity feature-aided multiple hypotheses tracking for underwater active small targets in high-clutter harbor environment J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-04-03 Shuang Zhao, Yina Han, Qingyu Liu, Jun Song, Haining Huang
Active tracking of underwater small targets is a great challenge with kinematic information alone. This is because the active sonar often encounters multipath propagation and the induced clutter can even mask target echoes. Recently, high-order time lacunarity (HOT-Lac) has shown its ability in effectively highlighting “blob” targets from high clutter harbor environments. Hence, this paper proposes
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Inherent envelope fluctuations in forward masking: Effects of age and hearing loss J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-04-03 Marc A. Brennan, Adam Svec, Afagh Farhadi, Braden N. Maxwell, Laurel H. Carney
Forward masking is generally greater for Gaussian noise (GN) than for low-fluctuation noise maskers, i.e., GN disruption. Because the minimal hearing loss that is associated with older age may affect GN disruption differently than more significant hearing loss, the current study explored the contribution of minimal hearing loss associated with older age to GN disruption. GN disruption was measured
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A multi-fidelity Gaussian process for efficient frequency sweeps in the acoustic design of a vehicle cabin J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-04-03 Caglar Gurbuz, Martin Eser, Johannes Schaffner, Steffen Marburg
Highly accurate predictions from large-scale numerical simulations are associated with increased computational resources and time expense. Consequently, the data generation process can only be performed for a small sample size, limiting a detailed investigation of the underlying system. The concept of multi-fidelity modeling allows the combination of data from different models of varying costs and
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Acoustic recording of false killer whale (Pseudorca crassidens) from Mexico (L) J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-04-03 Raul Rio
This study collected acoustic information on false killer whales (Pseudorca crassidens) in Mexican waters, close to Roca Partida Island, Revillagigedo Archipelago. In total, 321 whistles were collected after we found a group with at least ten individuals. The high prevalence of ascending contour types [upsweep (type I): 42.99%] contradicted the idea that false killer whales mostly produce constant
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Modeling impedance boundary conditions and acoustic barriers using the immersed boundary method: The one-dimensional case J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-04-03 Stefan Bilbao
Immersed boundary methods are heavily used in computational fluid dynamics, as an alternative to volumetric meshing, when a problem contains irregular geometric features. In wave-based architectural and room acoustics, the dynamics are simplified, but boundary conditions and acoustic barriers are usually described in terms of frequency-dependent impedance and transmittance functions. In this article
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Three-dimensional time-domain Green's functions and spatial impulse responses for the van Wijngaarden wave equation J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-04-03 Vaughn E. Holmes, Robert J. McGough
An exact analytical three-dimensional time-domain Green's function is introduced for the van Wijngaarden wave equation when the coefficients of the two loss terms satisfy a specific relationship. This analytical Green's function, which describes frequency-squared attenuation in acoustic media such as water, enables the subsequent derivation of new expressions that describe the lossy spatial impulse
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Testing the theoreticians J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-04-03 Derek R. Olson, Marcia J. Isakson
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.
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Optimization design of the sound absorbing structure of double-layer porous metal material with air layer based on genetic algorithm J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-03-29 Han Mi, Li-Si Liang, Hong-Yue Ma, Zi-Heng Zhang, Jiang-Yu Qiao, Chen Zhao, Yan-Li Gao, Lin-Bo Li
An acoustic absorption structure of a double-layer porous metal material with air layers is proposed. The Johnson-Champoux-Allard (JCA) model combined with the transfer matrix method (TMM) was used to establish the theoretical calculation model of the sound absorption coefficient (SAC). Meanwhile, the SAC between 500 and 6300 Hz were measured with an impedance tube. The errors between the theoretical
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Echolocation clicks of free-ranging Indo-Pacific finless porpoises (Neophocaena phocaenoides) in Hainan waters J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-03-28 Likun Zhao, Giacomo Giorli, Francesco Caruso, Lijun Dong, Zining Gong, Mingli Lin, Songhai Li
The echolocation clicks of free-ranging Indo-Pacific finless porpoises (IPFPs, Neophocaena phocaenoides) have been rarely studied in the wild. This paper aims at describing the echolocation-click characteristics of IPFPs and examining whether IPFPs adapt their sonar system to the habitats in Hainan waters, China. The echolocation clicks were recorded using a 13 elements star-shaped array of hydrophones
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On the accuracy of one-way approximate models for nonlinear waves in soft solids J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-03-23 Harold Berjamin
Simple strain-rate viscoelasticity models of isotropic soft solid are introduced. The constitutive equations account for finite strain, incompressibility, material frame-indifference, nonlinear elasticity, and viscous dissipation. A nonlinear viscous wave equation for the shear strain is obtained exactly and corresponding one-way Burgers-type equations are derived by making standard approximations
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Lateralization of interaural time differences with mixed rates of stimulation in bilateral cochlear implant listeners J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-03-22 Tanvi Thakkar, Alan Kan, Ruth Y. Litovsky
While listeners with bilateral cochlear implants (BiCIs) are able to access information in both ears, they still struggle to perform well on spatial hearing tasks when compared to normal hearing listeners. This performance gap could be attributed to the high stimulation rates used for speech representation in clinical processors. Prior work has shown that spatial cues, such as interaural time differences
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Contrast-enhanced ultrasound imaging using capacitive micromachined ultrasonic transducers J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-03-21 Sigrid Husebø Øygard, Martin Lind Ommen, Borislav Gueorguiev Tomov, Søren Elmin Diederichsen, Erik Vilain Thomsen, Matthias Bo Stuart, Niels Bent Larsen, Jørgen Arendt Jensen
Capacitive micromachined ultrasonic transducers (CMUTs) have a nonlinear relationship between the applied voltage and the emitted signal, which is detrimental to conventional contrast enhanced ultrasound (CEUS) techniques. Instead, a three-pulse amplitude modulation (AM) sequence has been proposed, which is not adversely affected by the nonlinearly emitted harmonics. In this paper, this is shown theoretically
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Modeling frequency shifts of collective bubble resonances with the boundary element method J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-03-21 Rudyard Jerez Boudesseul, Elwin van 't Wout
Increasing the number of closely packed air bubbles immersed in water changes the frequency of the Minnaert resonance. The collective interactions between bubbles in a small ensemble are primarily in the same phase, causing them to radiate a spherically symmetric field that peaks at a frequency lower than the Minnaert resonance for a single bubble. In contrast, large periodic arrays include bubbles
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Morphological and acoustic modeling of the vocal tract J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-03-21 Antoine Serrurier, Christiane Neuschaefer-Rube
In speech production, the anatomical morphology forms the substrate on which the speakers build their articulatory strategy to reach specific articulatory-acoustic goals. The aim of this study is to characterize morphological inter-speaker variability by building a shape model of the full vocal tract including hard and soft structures. Static magnetic resonance imaging data from 41 speakers articulating
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Dynamics of an oscillating microbubble in a blood-like Carreau fluid J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-03-20 Eric Hersey, Mauro RodriguezJr., Eric Johnsen
A numerical model for cavitation in blood is developed based on the Keller–Miksis equation for spherical bubble dynamics with the Carreau model to represent the non-Newtonian behavior of blood. Three different pressure waveforms driving the bubble oscillations are considered: a single-cycle Gaussian waveform causing free growth and collapse, a sinusoidal waveform continuously driving the bubble, and
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Validity of the effective sound speed approximation in parabolic equation models for wind turbine noise propagation J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-03-20 Bill Kayser, David Mascarenhas, Benjamin Cotté, David Ecotière, Benoit Gauvreau
Parabolic equation (PE) based methods are widely used in outdoor acoustics because they can solve acoustic propagation problems above a mixed ground in a refractive and scattering atmosphere. However, recent research has shown phase error due to the effective sound speed approximation (ESSA). To overcome these limitations, a new PE formulation derived without the ESSA has been proposed recently. We
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Seismo-acoustic coupling in the deep atmosphere of Venus J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-03-20 Gil Averbuch, Reyna Houston, Andi Petculescu
The extreme conditions at the surface of Venus pose a challenge for monitoring the planet's seismic activity using long-duration landed probes. One alternative is using balloon-based sensors to detect venusquakes from the atmosphere. This study aims to assess the efficiency with which seismic motion is coupled as atmospheric acoustic waves across Venus's surface. It is, therefore, restricted to the
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Inflow turbulence distortion for airfoil leading-edge noise prediction for large turbulence length scales for zero-mean loading J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-03-20 Fernanda L. dos Santos, Laura Botero-Bolívar, Cornelis H. Venner, Leandro D. de Santana
Turbulence distortion due to airfoil finite thickness is an important but not fully understood phenomenon that affects the airfoil radiated noise, resulting in inaccurate noise predictions. This study discusses the turbulence distortion in the leading edge (LE) region of an airfoil aiming to obtain more accurate LE noise predictions. Wind tunnel experiments were performed for National Advisory Committee
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Perceptual, procedural, and task learning for an auditory temporal discrimination task J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-03-20 Leslie Q. Zhen, Sheila R. Pratt
Perceptual learning reflects experience-driven improvements in the ability to detect changes in stimulus characteristics. The time course for perceptual learning overlaps with that for procedural learning (acquiring general skills and strategies) and task learning (learning the perceptual judgment specific to the task), making it difficult to isolate their individual effects. This study was conducted
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Direction of arrival estimation method for ground source based on optimally polarized Rayleigh waves J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-03-20 Xin Wang, Tao Jiang, Shuang Li, Jingye Wang, Yunfeng Chao, Kaikai Wang, Wenzhuo Xiong
This paper points out a critical issue in the study of estimating the azimuth of ground sources by using the polarization characteristics of Rayleigh waves: even if the signal quality is good, the degree of polarization of Rayleigh waves varies across different frequency bands, and the band with the strongest energy is not the one with the lowest azimuth error. A direction of arrival estimation method
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Estimation of fat content in soft tissues using dual frequency ultrasound—A phantom study J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-03-17 Stian Solberg, Naseh Amini, Yamen Zaza, Bjørn A. J. Angelsen, Rune Hansen
This paper presents an initial investigation into the use of dual frequency pulse-echo ultrasound, second order ultrasound field (SURF) imaging, to measure the fat content of soft tissues. The SURF imaging method was used to measure the non-linear bulk elasticity (NBE) of several fatty phantoms that were created by mixing different mass fractions of soybean oil uniformly into agar phantoms. The median
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Low frequency attenuation of acoustic waves in a perforated pipe J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-03-17 A. Dell, A. Krynkin, K. V. Horoshenkov, G. Sailor
This paper presents new experimental and numerical evidence that perforations in a pipe wall result in a low-frequency bandgap within which sound waves rapidly attenuate. These perforations are modelled as an acoustically soft boundary condition on the pipe wall and show that a low frequency bandgap is created from 0 Hz. The upper bound of this bandgap is determined by the dimensions and separation
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Inner-hair-cell induced hearing loss: A biophysical modeling perspective J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-03-17 Michael Faran, Miriam Furst
In recent years, experimental studies have demonstrated that malfunction of the inner-hair cells and their synapse to the auditory nerve is a significant hearing loss (HL) contributor. This study presents a detailed biophysical model of the inner-hair cells embedded in an end-to-end computational model of the auditory pathway with an acoustic signal as an input and prediction of human audiometric thresholds
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Layered piezoelectric structures with arbitrary acoustic termination impedances J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-03-16 Stefan Braun, Helmut Nowotny, Ewald Benes, Martin Gröschl
Multilayer piezoelectric transducers and resonators are widely used for generating propagating and standing acoustic waves as well as for sensor devices. More recently, layered piezoelectric structures based on thin film technology became increasingly important for electromechanical filters used in mobile phones. As a consequence, analytical mathematical modeling of such structures is of high interest
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The acoustic performances of a subwavelength hierarchical honeycomb structure: Analytical, numerical, and experimental investigations J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-03-16 Wenjiong Chen, Chen Lu, Xiaopeng Wang, Shutian Liu
This paper proposes a subwavelength hierarchical honeycomb structure (SHHS) with a compact lateral dimension and double-band perfect absorption in low frequencies. Unlike the conventional micro-perforated panel (MPP)-honeycomb sandwich absorber, this structure has an additional internal honeycomb with a perforated wall. Therefore, there are two resonant cavities in the SHHS to realize multiple absorption
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Middle ear muscle and medial olivocochlear activity inferred from individual human ears via cochlear potentials J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-03-15 Skyler G. Jennings, Elizabeth Sarai Aviles
The peripheral auditory system is influenced by the medial olivocochlear (MOC) and middle ear muscle (MEM) reflexes. When elicited by contralateral acoustic stimulation (CAS), these reflexes reduce cochlear amplification (MOC reflex) and limit low-frequency transmission through the middle ear (MEM reflex). The independent roles of these reflexes on auditory physiology and perception are difficult to
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Sound properties produced by white-edged rockfish (Sebastes taczanowskii) in relation to body and swim bladder size J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-03-15 Naoto Matsubara, Seiji Katakura, Ryuzo Takahashi, Tomonari Akamatsu, Hiroki Yasuma
The sound properties produced by the white-edged rockfish (Sebastes taczanowskii Steindachner, 1880) were compared with the body size. We conducted a tank experiment to compare the sound properties with body length, which ranged from 12.4 to 19.8 cm. Sound production was composed of pulses with a duration of 0.010–0.022 s and a peak frequency of 400–1000 Hz. Peak frequency decreased with fish and swim
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SoundScape learning: An automatic method for separating fish chorus in marine soundscapes J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-03-15 Ella B. Kim, Kaitlin E. Frasier, Megan F. McKenna, Annebelle C. M. Kok, Lindsey E. Peavey Reeves, William K. Oestreich, Gabrielle Arrieta, Sean Wiggins, Simone Baumann-Pickering
Marine soundscapes provide the opportunity to non-invasively learn about, monitor, and conserve ecosystems. Some fishes produce sound in chorus, often in association with mating, and there is much to learn about fish choruses and the species producing them. Manually analyzing years of acoustic data is increasingly unfeasible, and is especially challenging with fish chorus, as multiple fish choruses
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Guidelines for higher efficiency supported thermo-acoustic emitters based on periodically Joule heated metallic films J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-03-14 Boris Leizeronok, Slava Losin, Alex Kleiman, Shimon Julius, Iliya Romm, Beni Cukurel
The paper focuses on the evaluation of the impact associated with various geometrical and material properties on the overall acoustic performance of generic multi-layer thermo-acoustic sources. First, a generalized numerical framework is developed using a state-of-the-art thermo-acoustic emission model for multi-layered devices and is used to forecast the effects associated with different parameters
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Backscattering enhancements by partially exposed spheres due to reflected subsonic Rayleigh waves at air–water interfaces J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-03-14 Liwen Tan, Jun Fan, Bin Wang, Kaiqi Zhao, Bing Li
Air–water interfaces can enable distinct target scattering mechanisms different from the mechanism under free field conditions. In this study, backscattering experiments are performed by lowering an acrylic or polymethylmethacrylate sphere through the air–water interface into the water and insonifying the sphere from below at grazing incidence. Pronounced backscattering enhancements associated with
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Weak-form homogenization of two and three-dimensional fluid acoustical systems J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-03-14 Michael B. Muhlestein
A one-dimensional weak-form homogenization method [Muhlestein, J. Acoust. Soc. Am. 147(5), 3584–3593 (2020)] is extended to two and three-dimensional for quasi-static fluid systems. This homogenization approach uses a local multiple-scales approximation to estimate the acoustical fields within a representative volume element, substitutes these approximations into a weak formulation of the mechanics
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Acoustic shock waves emitted from two interacting laser generated plasmas in air J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-03-13 Manikanta Elle, Nagaraju Guthikonda, S. Sai Shiva, P. Prem Kiran
We present an acoustic detection technique to study the interaction of two shock waves emitted by two nearby, simultaneous, laser-induced air-breakdown events that resembles the phenomenon of interaction of fluids. A microphone is employed to detect the acoustic shock wave (ASW) from the interaction zone. The experiments were done at various separation distances between the two plasma sources. The
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Extending the Hearing-Aid Speech Perception Index (HASPI): Keywords, sentences, and context J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-03-13 James M. Kates
The Hearing-Aid Speech Perception Index version 2 (HASPI v2) is a speech intelligibility metric derived by fitting subject responses scored as the proportion of complete sentences correct. This paper presents an extension of HASPI v2, denoted by HASPI w2, which predicts proportion keywords correct for the same datasets used to derive HASPI v2. The results show that the accuracy of HASPI w2 is nearly
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Diffraction of directional sources by rigid wedges or barriers J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-03-10 Jun Gu, Yong Shen, Xuelei Feng
The secondary-edge-source method (SESM) has found widespread application in predicting edge diffraction. The method, however, is limited to point sources. Based on the concept of weighted summation of diffractive contribution from each propagation path, this letter extends the SESM to directional sources with equivalent acoustic centers. The validity of the proposed method is demonstrated by comparing
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Boundary effects on the streaming flow around a bubble located at the velocity antinode of a standing wave J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-03-10 Mohammad K. Alhamli, Satwindar Singh Sadhal
This study uses the singular perturbation method to analyze the streaming flow around a pulsating bubble at the velocity antinode of a standing wave. The bubble radially and laterally oscillates with small nondimensional amplitudes of ε` and ε, respectively. The momentum equation is expanded using ε. The frequency parameter M, which is the ratio of the bubble radius to the viscous length, is included
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Loudspeaker array beamforming for sound projection in a half-space with an impedance boundary J. Acoust. Soc. Am. (IF 2.4) Pub Date : 2023-03-09 Keyu Pan, Jie Huang, Jiazheng Cheng, Yong Shen
Sound projection is a method of using highly focused sources to project sound onto reflective surfaces to create the impression of surround sound, which can be realized via beamforming using loudspeaker arrays. Generally, these devices are mounted near a surface with a finite acoustic impedance, such as a TV accent wall. The beamforming performance degrades in this half-space with an impedance boundary