{"title":"An acoustic metamaterial with space-time modulated densitya).","authors":"Xiaohui Zhu, Chen Shen","doi":"10.1121/10.0034634","DOIUrl":"https://doi.org/10.1121/10.0034634","url":null,"abstract":"<p><p>Space-time modulation opens the door for unprecedented wave behavior control, such as nonreciprocal wave manipulation. Here is proposed a one-dimensional space-time modulated membrane system aiming to realize a kind of acoustic metamaterial with space-time modulated effective density. Three different approaches, namely, the effective medium method, transfer matrix method, and time-domain simulation, are applied to analyze the acoustic response of the system under a monochromatic incidence. Results show that the proposed metamaterial can support two different nonreciprocal acoustic functionalities, namely, unidirectional parametric amplification and parametric frequency conversion, when different modulation profiles are enforced.</p>","PeriodicalId":17168,"journal":{"name":"Journal of the Acoustical Society of America","volume":"156 6","pages":"3984-3991"},"PeriodicalIF":2.1,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142818277","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}
Raphael Crowley, Moses Bosco, Amanda Schaaf, Mariam Makoleo, Consolatha Mushi, Brandon Rivera, Jonathan Berube, Clark Morgan, Emily Sapp, Christian H Matemu, Dillon Sypula, James J Gelsleichter, Brian T Kopp
{"title":"An easy to implement empirical approach for estimating underwater sound transmission loss during pile driving in Florida.","authors":"Raphael Crowley, Moses Bosco, Amanda Schaaf, Mariam Makoleo, Consolatha Mushi, Brandon Rivera, Jonathan Berube, Clark Morgan, Emily Sapp, Christian H Matemu, Dillon Sypula, James J Gelsleichter, Brian T Kopp","doi":"10.1121/10.0034619","DOIUrl":"https://doi.org/10.1121/10.0034619","url":null,"abstract":"<p><p>Underwater noise data were collected from 84 pile drives during bridge construction at various sites in Florida. These data were used to develop an empirically based model for underwater transmission loss associated with root mean squared, peak, and sound exposure level values. The model was verified using readings from other datasets as well as data from this study, and it appeared to reproduce reported transmission loss coefficient values well when data were curated to match data used in the empirical model's development and limited to situations where robust data were used in model development. As such, the model described here has some limitations, but in the context of pile driving in Florida where most piles are of similar dimensions and driven in similar water depths, especially during impact pile driving concrete piles, it may represent a useful design tool that engineers can use to predict underwater noise due to pile driving without the need to sample sound at multiple locations during driving.</p>","PeriodicalId":17168,"journal":{"name":"Journal of the Acoustical Society of America","volume":"156 6","pages":"4048-4060"},"PeriodicalIF":2.1,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142837113","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}
Tristan Cotillard, Xavier Sécheresse, Jaclyn Aubin, Marie-Ana Mikus, Valeria Vergara, Sébastien Gambs, Robert Michaud, Cristiane C A Martins, Samuel Turgeon, Clément Chion, Irene Roca
{"title":"Automatic detection and classification of beluga whale calls in the St. Lawrence estuary.","authors":"Tristan Cotillard, Xavier Sécheresse, Jaclyn Aubin, Marie-Ana Mikus, Valeria Vergara, Sébastien Gambs, Robert Michaud, Cristiane C A Martins, Samuel Turgeon, Clément Chion, Irene Roca","doi":"10.1121/10.0030472","DOIUrl":"https://doi.org/10.1121/10.0030472","url":null,"abstract":"<p><p>The endangered beluga whale (Delphinapterus leucas) of the St. Lawrence Estuary (SLEB) faces threats from a variety of anthropogenic factors. Since belugas are a highly social and vocal species, passive acoustic monitoring has the potential to deliver, in a non-invasive and continuous way, real-time information on SLEB spatiotemporal habitat use, which is crucial for their monitoring and conservation. In this study, we introduce an automatic pipeline to analyze continuous passive acoustic data and provide standard and accurate estimations of SLEB acoustic presence and vocal activity. An object detector extracted vocalizations of beluga whales from an acoustic recording of beluga vocal activity. Then, two deep learning classifiers discriminated between high-frequency call types (40-120 kHz) and the presence of low-frequency components (0-20 kHz), respectively. Different algorithms were tested for each step and their main combinations were compared in time and performance. We focused our work on a high residency area, Baie Sainte-Marguerite (BSM), used for socialization and feeding by SLEB. Overall, this project showed that accurate continuous analysis of SLEB vocal activity at BSM could provide valuable information to estimate habitat use, link beluga behavior and acoustic activity within and between herds, and quantify beluga presence and abundance.</p>","PeriodicalId":17168,"journal":{"name":"Journal of the Acoustical Society of America","volume":"156 6","pages":"3723-3740"},"PeriodicalIF":2.1,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142785964","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}
Sergey A Fadeev, Damir A Gubaidullin, Linar R Shaidullin
{"title":"Effect of the radial temperature gradient on resonant oscillations of gas in a closed tube.","authors":"Sergey A Fadeev, Damir A Gubaidullin, Linar R Shaidullin","doi":"10.1121/10.0034620","DOIUrl":"https://doi.org/10.1121/10.0034620","url":null,"abstract":"<p><p>Resonant oscillations of gas in a closed tube with a heat source are studied. The amplitude-frequency characteristics and spatial distributions of pressure and velocity amplitudes in a tube with a radial temperature gradient are calculated. It is shown that a radial temperature gradient leads to the radial dependence of the oscillation velocity in the flow core and reduces the average value of the momentum source due to viscosity. Together with the temperature dependence of the viscosity, this leads to the amplification of resonant gas oscillations in a tube with a heat source. The influence of the heat source on the resonant gas oscillations is determined by the radial temperature gradient and the square of the reduced oscillation frequency.</p>","PeriodicalId":17168,"journal":{"name":"Journal of the Acoustical Society of America","volume":"156 6","pages":"4123-4132"},"PeriodicalIF":2.1,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142853898","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":"A robust error sensing strategy for global active noise control in car cabins.","authors":"Shuping Wang, Pengju Zhang, Ziyi Yang, Jiancheng Tao, Haishan Zou, Xiaojun Qiu","doi":"10.1121/10.0034548","DOIUrl":"https://doi.org/10.1121/10.0034548","url":null,"abstract":"<p><p>Global active noise control (ANC) systems reduce noise over the entire car cabin with robust performance even as the human head moves; however, they have not been implemented in real-world applications. A robust error sensing strategy is proposed in this paper that is based on which a feasible global ANC system is realized in an electric car, and real-time ANC experiments demonstrate its effectiveness. Simulations based on measured road noise show that using evenly distributed error sensors is a robust error sensing strategy for different car speeds and the upper limit frequency of 3 dB global control is inversely proportional to the equivalent distance between error sensors. Real-time experiments with a 5-seat A-class sedan demonstrate that an average noise reduction of 3.8 dB was achieved between 50 and 250 Hz with 12 evenly distributed error sensors using the four standard car audio loudspeakers as secondary sources. Virtual sensing techniques can be integrated to constitute a more practical system without obstructing the movement of human heads. The findings in this study establish a benchmark for global noise control in car cabins and can be a starting point for future optimization of the system and implementation of adaptive algorithms.</p>","PeriodicalId":17168,"journal":{"name":"Journal of the Acoustical Society of America","volume":"156 6","pages":"3809-3820"},"PeriodicalIF":2.1,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142801211","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":"Calibrating position and orientation of multiple ultrasound phased array units using Bayesian optimization.","authors":"Jianyu Chen, Shun Suzuki, Yasutoshi Makino, Hiroyuki Shinoda","doi":"10.1121/10.0034559","DOIUrl":"https://doi.org/10.1121/10.0034559","url":null,"abstract":"<p><p>Airborne ultrasound phased arrays (AUPAs) generate non-contact tactile sensations and enable acoustic levitation with specific focus fields. Using multiple units together offers numerous advantages, such as increased stimulus intensity and the ability to overcome occlusion. The AUPA units are typically mounted on a fixed frame, with their poses manually measured using tools such as a ruler for calibration. However, to increase the degrees of freedom for these units, a more flexible calibration method is required. With a wavelength of 8.5 mm, a 4 mm deviation in propagation distance from the two phased arrays can weaken the pressure at the focus position. Hence, in this study, calibration based on pose and focus information obtained through image processing was performed. First, augmented reality markers are attached to each AUPA unit for rough estimation of pose parameters. Second, using these approximate poses, the pressure distribution generated on a specific plane is estimated through thermal imaging. Finally, Bayesian optimization is employed to efficiently explore the pose parameters to minimize the error between the desired position and generated focal point. This approach enables the efficient calibration of the relative poses of AUPA units, even when they are placed in challenging-to-measure locations.</p>","PeriodicalId":17168,"journal":{"name":"Journal of the Acoustical Society of America","volume":"156 6","pages":"3838-3851"},"PeriodicalIF":2.1,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142801215","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":"Driving function in wave field synthesis with integral approximation considering uneven contribution of loudspeaker units.","authors":"Inkoo Jeon, Seokjin Lee","doi":"10.1121/10.0034558","DOIUrl":"https://doi.org/10.1121/10.0034558","url":null,"abstract":"<p><p>Wave field synthesis is a spatial audio technique for reproducing the sound field of a target source. This process is implemented by applying driving functions to loudspeakers enclosing a listening space. To reduce computational and hardware costs, several studies assume that the target source is sufficiently far from the loudspeakers, but this assumption depends on source frequency and can lead to errors. A recent method attempted to address this issue using oversampling and averaging; however, this approach increases computational demands, particularly for multiple target sources. Such steps result in high computational costs when there are numerous target sources. In this study, we propose an alternative method using an integral approximation that imitates the linearity of integral operations, taking into account the uneven contributions of loudspeakers. This eliminates the need for oversampling and averaging. Simulation results showed that our method improved sound reproduction compared to the recent method at high frequencies and conventional methods at low frequencies, especially when the target source was close to loudspeakers and not aligned with them. Our approach could potentially be applied to tasks that use the same integrand, widely used to model sources and fields.</p>","PeriodicalId":17168,"journal":{"name":"Journal of the Acoustical Society of America","volume":"156 6","pages":"3877-3892"},"PeriodicalIF":2.1,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142801266","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":"Circuit models for thermoviscous acoustics in waveguides of various cross sections via continued fractions.","authors":"René Christensen","doi":"10.1121/10.0034550","DOIUrl":"https://doi.org/10.1121/10.0034550","url":null,"abstract":"<p><p>Thermal and viscous losses are crucial for accurate representation of wave propagation in small conduits. Analytical expressions exist for the series and shunt immitances representing the transmission line characteristics of thermoviscous acoustics in one-dimensional tubes of certain cross sections, and for a subset of these cases, circuit models with constant and positive component values can approximate these generally nonrational solutions. A continued fraction approach introduced previously for the circular cross section has been applied, here, to the slit and equilateral triangular cross-section cases with the same canonical forms and constant and positive component values for the series and shunt immitances. The resulting networks can be used for steady-state and time-dependent calculations due to their passivity and rational nature and are easily expanded to cover any desired frequency range.</p>","PeriodicalId":17168,"journal":{"name":"Journal of the Acoustical Society of America","volume":"156 6","pages":"3930-3942"},"PeriodicalIF":2.1,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142807099","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}
Amulya Lomte, Yutong Xue, William Johnston, Guochenhao Song, J Stuart Bolton, Bhisham Sharma
{"title":"Acoustic modeling of three-dimensional-printed fibrous sound absorbersa).","authors":"Amulya Lomte, Yutong Xue, William Johnston, Guochenhao Song, J Stuart Bolton, Bhisham Sharma","doi":"10.1121/10.0034429","DOIUrl":"https://doi.org/10.1121/10.0034429","url":null,"abstract":"<p><p>In this study, an analytical model was developed to predict the sound absorption performance of fibrous absorbers fabricated using an extrusion-based three-dimensional (3D) printing method. The proposed model employs geometric design parameters, including the average fiber diameter and the horizontal and vertical fiber separations, to calculate the porosity, static airflow resistivity, tortuosity, and viscous and thermal characteristic lengths. These transport parameters are then used within the Johnson-Champoux-Allard semiempirical formulation to predict the normal incidence sound absorption coefficient. The analytical model was validated by comparing the calculated properties with those obtained using the finite element-based hybrid numerical modeling method and those estimated through direct and indirect experimental measurements. Finally, by using the validated analytical model, the effect of each geometrical design parameter on the sound absorption performance of the 3D-printed fibrous absorbers was investigated, revealing that the absorption behavior is primarily controlled by the static airflow resistivity and showing that high absorption peaks and a broadband absorption profile can be achieved by adjusting the three geometrical parameters. This study highlights the potential of 3D printing to fabricate fibrous sound absorbers with tailored acoustic properties, offering a promising solution for advanced noise control materials.</p>","PeriodicalId":17168,"journal":{"name":"Journal of the Acoustical Society of America","volume":"156 6","pages":"3757-3771"},"PeriodicalIF":2.1,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142785960","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}
Devin Pascoe, John L Spiesberger, David K Mellinger
{"title":"Unreported large errors in a common method for sound source localization of marine mammals.","authors":"Devin Pascoe, John L Spiesberger, David K Mellinger","doi":"10.1121/10.0034547","DOIUrl":"https://doi.org/10.1121/10.0034547","url":null,"abstract":"<p><p>Confidence intervals of location of calling marine mammals, derived from time differences of arrival (TDOA) between receivers, depend on errors of TDOAs, receiver location, clocks, sound speeds, and location method. Simulations demonstrate Ishmael, a TDOA locator based on uncorrected least squares minimization (ULSM), yields errors with mean, standard deviation, and maximum of 0.1, 0.2, and 0.9 km, respectively, due to sensitivity to inputs and numerical implementation when applied to scenarios with minuscule errors; e.g., five clock-synchronized receivers residing on the vertices of a square with one in its center. This sensitivity can mask other causes of location error due to small uncertainties in receiver location and sound speed. Realistic uncertainties of sound speed up to ±7.5 m/s lead to errors up to 4 km. With unsynchronized clocks and common practice of correcting TDOA from synchronization measurements at the start and end of an experiment, errors of location are 10 to 1000 km. These problems occur because ULSM was not designed to account for all errors. ULSM is also available in PAMGuard and other systems and is used to study behavior and abundance of calling marine mammals. ULSM is briefly compared to another method designed to account for errors.</p>","PeriodicalId":17168,"journal":{"name":"Journal of the Acoustical Society of America","volume":"156 6","pages":"3780-3787"},"PeriodicalIF":2.1,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142789640","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}