Journal of the Acoustical Society of America最新文献_第9页

Differential Volterra filter: A two-stage decoupling method for audible sounds generated by parametric array loudspeakers based on Westervelt equation.

IF 2.1 2区物理与天体物理

Journal of the Acoustical Society of America Pub Date : 2025-02-01 DOI: 10.1121/10.0035791

Wenyao Ma, Yunxi Zhu, Peifeng Ji, Zheng Kuang, Ming Wu, Jun Yang

{"title":"Differential Volterra filter: A two-stage decoupling method for audible sounds generated by parametric array loudspeakers based on Westervelt equation.","authors":"Wenyao Ma, Yunxi Zhu, Peifeng Ji, Zheng Kuang, Ming Wu, Jun Yang","doi":"10.1121/10.0035791","DOIUrl":"https://doi.org/10.1121/10.0035791","url":null,"abstract":"Parametric array loudspeakers (PALs) produce highly directional sounds due to the parametric process in air. Its application in creating personal audio zones requires simple modeling of the audible sound field near the PAL, which is crucial for subsequent designs to reduce inherent nonlinear distortion. However, current accurate methods for describing the sound field, reliant on numerical solutions to wave equations, are computationally intensive. To achieve both effectiveness and simplicity, this paper proposes a time-domain model for audible sounds generated in the Westervelt far field, called the differential Volterra filter (Diff-VF). It is obtained through two stages: first, a narrow-band (NB) approximation is introduced to decouple the virtual source energy density from interactions of ultrasonic beams when solving the Westervelt equation. This results in a NB Westervelt solution for time-domain inputs. Second, to further develop a generic response independent of inputs, a temporal-spatial discretization is used to simplify the NB Westervelt solution into the Diff-VF model with a one-dimensional kernel. Numerical simulations confirmed the effectiveness of the NB Westervelt solution when compared with an exact solution, whether on- and off-axis. Experimental results validated that the Diff-VF model achieved superior prediction performance over existing VF-based models, with insensitivity to inputs and lower complexity.","PeriodicalId":17168,"journal":{"name":"Journal of the Acoustical Society of America","volume":"157 2","pages":"1057-1071"},"PeriodicalIF":2.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143399454","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}

引用次数: 0

Quantifying the effect of fiber pennation angle on shear wave viscoelastography estimates: In silico and phantom studies.

IF 2.1 2区物理与天体物理

Journal of the Acoustical Society of America Pub Date : 2025-02-01 DOI: 10.1121/10.0035788

Akash Chandra, Mekdes Wubet Bezabh, Karla P Mercado-Shekhar

{"title":"Quantifying the effect of fiber pennation angle on shear wave viscoelastography estimates: In silico and phantom studies.","authors":"Akash Chandra, Mekdes Wubet Bezabh, Karla P Mercado-Shekhar","doi":"10.1121/10.0035788","DOIUrl":"https://doi.org/10.1121/10.0035788","url":null,"abstract":"Ultrasound shear wave elastography can be useful for assessing muscle pathology. The effect of anisotropy on shear wave elasticity estimates of skeletal muscle has been reported previously. However, muscle is inherently viscoelastic, and hence, tissue viscosity is also an important material parameter to assess. The goal of this study was to systematically quantify the effect of fiber pennation angle on shear wave viscoelasticity imaging estimates. Numerical phantom simulations of skeletal muscle-mimicking phantoms were analyzed. Anisotropic polyvinyl alcohol phantoms embedded with polysulfone fibers were developed to mimic the viscoelasticity and appearance of muscle in B-mode images. Shear wave dispersion analysis, assuming a Kelvin-Voigt model, was performed to estimate the shear modulus and viscosity of the phantoms along the fibers (in-plane) and across the fibers (cross-plane) with varying pennation angles (0°-30°). A decreasing trend was observed in shear modulus estimates with increasing fiber pennation angle in the in-plane orientation for all phantoms. Notably, simulations showed that viscosity estimates decreased with increasing angle. These results provide a systematic quantification of the effect of fiber pennation angle on viscoelastic estimates under controlled conditions, which will be useful for assessing the performance of shear wave viscoelasticity imaging approaches for muscle assessment.","PeriodicalId":17168,"journal":{"name":"Journal of the Acoustical Society of America","volume":"157 2","pages":"993-1003"},"PeriodicalIF":2.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143382528","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}

引用次数: 0

Broadband noise modulation of multirotor aircrafta).

IF 2.1 2区物理与天体物理

Journal of the Acoustical Society of America Pub Date : 2025-02-01 DOI: 10.1121/10.0035646

Ze Feng Ted Gan, Vitor Tumelero Valente, Kenneth S Brentner, Eric Greenwood

{"title":"Broadband noise modulation of multirotor aircrafta).","authors":"Ze Feng Ted Gan, Vitor Tumelero Valente, Kenneth S Brentner, Eric Greenwood","doi":"10.1121/10.0035646","DOIUrl":"10.1121/10.0035646","url":null,"abstract":"Rotor broadband noise is typically analyzed over time scales encompassing multiple rotor periods. However, modulation of broadband noise levels with the blade passage frequency has been shown to be significant for human perception of wind turbine and helicopter noise. In contrast, broadband noise modulation has not been extensively studied for aircraft with many rotors, such as unmanned aerial vehicles (UAVs) or advanced air mobility aircraft. In this work, significant broadband noise modulation was measured in flight tests and anechoic chamber experiments of hexacopter UAVs. The amplitude of this modulation depended on the azimuthal phase offsets between rotors, demonstrating the potential for synchrophasing control to reduce broadband noise modulation, analogous to synchrophasing control of tonal noise. If rotors are not synchronized, as in typical flight, the azimuthal phase offsets between rotors vary with time. This variation was found to follow a uniform random distribution, resulting in modulation depth also varying randomly with time. The probability distribution of modulation depth was computed using offset copies of the modulation of a single rotor. These results contribute understanding to how the broadband noise modulation of rotors sum together, and showed that this modulation is likely to be significant in flight.","PeriodicalId":17168,"journal":{"name":"Journal of the Acoustical Society of America","volume":"157 2","pages":"924-939"},"PeriodicalIF":2.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143365115","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}

引用次数: 0

Hearing threshold quartiles from the 1999-2006 National Health and Nutrition Examination Surveys.

IF 2.1 2区物理与天体物理

Journal of the Acoustical Society of America Pub Date : 2025-02-01 DOI: 10.1121/10.0035784

William J Murphy, Gregory A Flamme, Katalin G Losonczy, Christa L Themann, Howard J Hoffman

引用次数: 0

Reduction of nonlinear distortion in condenser microphones using a simple post-processing technique.

IF 2.1 2区物理与天体物理

Journal of the Acoustical Society of America Pub Date : 2025-02-01 DOI: 10.1121/10.0035579

Petr Honzík, Antonin Novak

{"title":"Reduction of nonlinear distortion in condenser microphones using a simple post-processing technique.","authors":"Petr Honzík, Antonin Novak","doi":"10.1121/10.0035579","DOIUrl":"https://doi.org/10.1121/10.0035579","url":null,"abstract":"In this paper, an approach for effectively reducing nonlinear distortion in single-backplate condenser microphones is introduced, i.e., most microelectromechanical systems (MEMS) microphones, studio recording condenser microphones, and laboratory measurement microphones. This simple post-processing technique can be easily integrated on external hardware such as an analog circuit, microcontroller, audio codec, digital signal processing unit, or within the Application Specific Integrated Circuit chip in a case of MEMS microphones. It effectively reduces microphone distortion across its frequency and dynamic range, and relies on a single parameter, which can be derived from either the microphone's physical parameters or a straightforward measurement presented in this paper. An optimal estimate of this parameter achieves the best distortion reduction, whereas overestimating it never increases distortion beyond the original level. The technique was tested on a MEMS microphone. The findings indicate that for harmonic excitation, the proposed technique reduces the second harmonic by approximately 40 dB, leading to an effective reduction in the total harmonic distortion. The efficiency of the distortion reduction technique for more complex signals is demonstrated through two-tone and multitone experiments, where second-order intermodulation products are reduced by at least 20 dB.","PeriodicalId":17168,"journal":{"name":"Journal of the Acoustical Society of America","volume":"157 2","pages":"699-705"},"PeriodicalIF":2.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143080452","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}

引用次数: 0

Observation and modeling of three-dimensional sound propagation along a nonlinear internal gravity wave at a shelfbreak.

IF 2.1 2区物理与天体物理

Journal of the Acoustical Society of America Pub Date : 2025-02-01 DOI: 10.1121/10.0035785

Tzu-Ting Chen, Ying-Tsong Lin, Linus Y-S Chiu, William L Siegmann

引用次数: 0

A nonlinear sound field control method for a multi-channel parametric array loudspeaker array.

IF 2.1 2区物理与天体物理

Journal of the Acoustical Society of America Pub Date : 2025-02-01 DOI: 10.1121/10.0035797

Yunxi Zhu, Liwen Qin, Wenyao Ma, Fengyi Fan, Ming Wu, Zheng Kuang, Jun Yang

{"title":"A nonlinear sound field control method for a multi-channel parametric array loudspeaker array.","authors":"Yunxi Zhu, Liwen Qin, Wenyao Ma, Fengyi Fan, Ming Wu, Zheng Kuang, Jun Yang","doi":"10.1121/10.0035797","DOIUrl":"10.1121/10.0035797","url":null,"abstract":"A parametric array loudspeaker (PAL) generates a highly directional audible sound beam. However, indoor scattering and reflecting effects diminish its advantage of high directivity, causing the scattered or reflected sound to appear in undesired regions. Deriving from the Westervelt equation, the nonlinear coupling exists between each channel, rendering linear sound field control algorithms ineffective. This paper proposes a framework of nonlinear sound field control, enabling the manipulation of nonlinear sound fields generated by the PAL in complicated acoustic environments. Besides, PAL often faces challenges in radiation efficiency due to the poor conversion efficiency of nonlinear sound. Therefore, a sound control algorithm suitable for PAL is proposed, which maximizes radiation efficiency while ensuring acoustic contrast through a two-stage non-convex optimization procedure. The simulations and experimental results verify the effectiveness of the proposed framework and algorithm of nonlinear sound field control. The undesired audible sound in the dark zone is suppressed while maintaining the desired audible sound in the bright zone. This enhances the performance of a PAL in real scenarios with existing scattering or reflecting effects.","PeriodicalId":17168,"journal":{"name":"Journal of the Acoustical Society of America","volume":"157 2","pages":"962-975"},"PeriodicalIF":2.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143365111","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}

引用次数: 0

Linear nonreciprocal dynamics of coupled modulated systemsa).

IF 2.1 2区物理与天体物理

Journal of the Acoustical Society of America Pub Date : 2025-02-01 DOI: 10.1121/10.0035882

Jiuda Wu, Behrooz Yousefzadeh

{"title":"Linear nonreciprocal dynamics of coupled modulated systemsa).","authors":"Jiuda Wu, Behrooz Yousefzadeh","doi":"10.1121/10.0035882","DOIUrl":"https://doi.org/10.1121/10.0035882","url":null,"abstract":"Waveguides subject to spatiotemporal modulations are known to exhibit nonreciprocal vibration transmission, whereby interchanging the locations of the source and receiver changes the end-to-end transmission characteristics. The scenario of typical interest is unidirectional transmission in long, weakly modulated systems: when transmission is possible in one direction only. Here, with a view toward expanding their potential application as devices, we explore the vibration characteristics of spatiotemporally modulated systems that are short and strongly modulated. Focusing on two coupled systems, we develop a methodology to investigate the nonreciprocal vibration characteristics of both weakly and strongly modulated systems. In particular, we highlight the contribution of phase to nonreciprocity, a feature that is often overlooked. We show that the difference between the transmitted phases is the main contributor to breaking reciprocity in short systems. We clarify the roles of primary and sideband resonances, and their overlaps, in breaking reciprocity. We discuss the influence of modulation amplitude and wavenumber on the resonances of the modulated system. We hope this work brings more attention to the dynamics of strongly modulated systems.","PeriodicalId":17168,"journal":{"name":"Journal of the Acoustical Society of America","volume":"157 2","pages":"1356-1367"},"PeriodicalIF":2.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143458498","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}

引用次数: 0

Behavioral reactions of harbor porpoises to impact pile driving noise are predicted by the auditory frequency weighted sound pressure level.

IF 2.1 2区物理与天体物理

Journal of the Acoustical Society of America Pub Date : 2025-02-01 DOI: 10.1121/10.0035916

Jakob Tougaard

{"title":"Behavioral reactions of harbor porpoises to impact pile driving noise are predicted by the auditory frequency weighted sound pressure level.","authors":"Jakob Tougaard","doi":"10.1121/10.0035916","DOIUrl":"10.1121/10.0035916","url":null,"abstract":"Offshore impact pile driving is a major source of high level underwater noise that can disturb marine mammal behavior tens of kilometers away. Projects involving pile driving are therefore subject to environmental impact assessments, which include modelling of the spatial extent of the behavioral disturbance. Reliable predictions about behavioral reaction distances require robust estimates of the minimum received levels of noise above which animals are likely to respond. Studies of reactions of harbor porpoises to pile driving noise in the wild and playback in captivity were identified, and reaction thresholds were extracted. Thresholds were weighted with the auditory frequency weighting function for VHF-cetaceans, the functional hearing group to which porpoises belong. The thresholds derived from playback studies to animals in captivity could be frequency weighted directly, whereas thresholds from exposure to noise from actual pile driving activities were weighted via a range-dependent weighting factor. Seven studies of porpoise reactions provided a first estimate of a behavioral reaction threshold as a VHF-weighted received level (Lp,125 ms,VHF) in the range 95-115 dB re 1 μPa.","PeriodicalId":17168,"journal":{"name":"Journal of the Acoustical Society of America","volume":"157 2","pages":"1368-1377"},"PeriodicalIF":2.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143468259","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}

引用次数: 0

Orthogonal time-frequency space modulation for underwater mobile acoustic communications.

IF 2.1 2区物理与天体物理

Journal of the Acoustical Society of America Pub Date : 2025-02-01 DOI: 10.1121/10.0035938

Yukang Xue, Xiyuan Zhu, Y Rosa Zheng

{"title":"Orthogonal time-frequency space modulation for underwater mobile acoustic communications.","authors":"Yukang Xue, Xiyuan Zhu, Y Rosa Zheng","doi":"10.1121/10.0035938","DOIUrl":"10.1121/10.0035938","url":null,"abstract":"This paper presents a new turbo decision feedback equalizer and decoder (TDFED) for the orthogonal time-frequency space (OTFS) system of underwater mobile acoustic communications where the communication channel suffers from severe multipath and Doppler effects simultaneously. The proposed TDFED employs a set of feedforward and feedback filters in the time domain instead of the common approach that employs a normalized least mean square equalizer in the delay-Doppler domain. The receiver also utilizes low-complexity improved proportionate normalized least mean square channel estimation in the delay-Doppler domain. Practical OTFS modulation schemes are designed for acoustic transmission at a center frequency of 115 kHz and a symbol rate of 11.5 ksps (kilo-symbols-per-second). Several lake experiments in mobile communication scenarios are conducted to evaluate the proposed OTFS in comparison to the single-carrier coherent modulation (SCCM) and the orthogonal frequency division modulation (OFDM) schemes. The experimental results demonstrate that the proposed OTFS receiver effectively reduces the accuracy requirements of the Doppler compensation algorithm compared to the SCCM and OFDM schemes. The proposed TDFED algorithm achieves a much better bit error rate against long-multipath fading and severe Doppler shift than the existing delay-Doppler domain equalizers.","PeriodicalId":17168,"journal":{"name":"Journal of the Acoustical Society of America","volume":"157 2","pages":"1378-1390"},"PeriodicalIF":2.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143468339","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}

引用次数: 0