The Journal of the Acoustical Society of America最新文献_第4页

Paraxial and ray approximations of acoustic vortex beams. 声学涡流束的准轴近似和射线近似。

The Journal of the Acoustical Society of America Pub Date : 2024-04-01 DOI: 10.1121/10.0025688

Chirag A. Gokani, M. Haberman, Mark F. Hamilton

{"title":"Paraxial and ray approximations of acoustic vortex beams.","authors":"Chirag A. Gokani, M. Haberman, Mark F. Hamilton","doi":"10.1121/10.0025688","DOIUrl":"https://doi.org/10.1121/10.0025688","url":null,"abstract":"A compact analytical solution obtained in the paraxial approximation is used to investigate focused and unfocused vortex beams radiated by a source with a Gaussian amplitude distribution. Comparisons with solutions of the Helmholtz equation are conducted to determine bounds on the parameter space in which the paraxial approximation is accurate. A linear relation is obtained for the dependence of the vortex ring radius on the topological charge, characterized by its orbital number, in the far field of an unfocused beam and in the focal plane of a focused beam. For a focused beam, it is shown that as the orbital number increases, the vortex ring not only increases in radius but also moves out of the focal plane in the direction of the source. For certain parameters, it is demonstrated that with increasing orbital number, the maximum amplitude in a focused beam becomes localized along a spheroidal surface enclosing a shadow zone in the prefocal region. This field structure is described analytically by ray theory developed in the present work, showing that the spheroidal surface in the prefocal region coincides with a simple expression for the coordinates of the caustic surface formed in a focused vortex beam.","PeriodicalId":256727,"journal":{"name":"The Journal of the Acoustical Society of America","volume":"61 10","pages":"2707-2723"},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140795517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Urbanization alters the song propagation of two human-commensal songbird species. 城市化改变了两种与人类共生的鸣禽的鸣声传播。

The Journal of the Acoustical Society of America Pub Date : 2024-04-01 DOI: 10.1121/10.0025765

Sarah E Grimes, Eliza J Lewis, Linda A Nduwimana, Brian Yurk, Kelly L. Ronald

{"title":"Urbanization alters the song propagation of two human-commensal songbird species.","authors":"Sarah E Grimes, Eliza J Lewis, Linda A Nduwimana, Brian Yurk, Kelly L. Ronald","doi":"10.1121/10.0025765","DOIUrl":"https://doi.org/10.1121/10.0025765","url":null,"abstract":"Urban expansion has increased pollution, including both physical (e.g., exhaust, litter) and sensory (e.g., anthropogenic noise) components. Urban avian species tend to increase the frequency and/or amplitude of songs to reduce masking by low-frequency noise. Nevertheless, song propagation to the receiver can also be constrained by the environment. We know relatively little about how this propagation may be altered across species that (1) vary in song complexity and (2) inhabit areas along an urbanization gradient. We investigated differences in song amplitude, attenuation, and active space, or the maximum distance a receiver can detect a signal, in two human-commensal species: the house sparrow (Passer domesticus) and house finch (Haemorhous mexicanus). We described urbanization both discretely and quantitatively to investigate the habitat characteristics most responsible for propagation changes. We found mixed support for our hypothesis of urban-specific degradation of songs. Urban songs propagated with higher amplitude; however, urban song fidelity was species-specific and showed lowered active space for urban house finch songs. Taken together, our results suggest that urban environments may constrain the propagation of vocal signals in species-specific manners. Ultimately, this has implications for the ability of urban birds to communicate with potential mates or kin.","PeriodicalId":256727,"journal":{"name":"The Journal of the Acoustical Society of America","volume":"60 12","pages":"2803-2816"},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140795754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

ChildAugment: Data Augmentation Methods for Zero-Resource Children's Speaker Verification ChildAugment：零资源儿童口语验证的数据扩增方法

The Journal of the Acoustical Society of America Pub Date : 2024-02-23 DOI: 10.48550/arXiv.2402.15214

Vishwanath Pratap Singh, Md. Sahidullah, T. Kinnunen

{"title":"ChildAugment: Data Augmentation Methods for Zero-Resource Children's Speaker Verification","authors":"Vishwanath Pratap Singh, Md. Sahidullah, T. Kinnunen","doi":"10.48550/arXiv.2402.15214","DOIUrl":"https://doi.org/10.48550/arXiv.2402.15214","url":null,"abstract":"The accuracy of modern automatic speaker verification (ASV) systems, when trained exclusively on adult data, drops substantially when applied to children's speech. The scarcity of children's speech corpora hinders fine-tuning ASV systems for children's speech. Hence, there is a timely need to explore more effective ways of reusing adults' speech data. One promising approach is to align vocal-tract parameters between adults and children through children-specific data augmentation, referred here to as ChildAugment. Specifically, we modify the formant frequencies and formant bandwidths of adult speech to emulate children's speech. The modified spectra are used to train emphasized channel attention, propagation, and aggregation in time-delay neural network recognizer for children. We compare ChildAugment against various state-of-the-art data augmentation techniques for children's ASV. We also extensively compare different scoring methods, including cosine scoring, probabilistic linear discriminant analysis (PLDA), and neural PLDA. We also propose a low-complexity weighted cosine score for extremely low-resource children ASV. Our findings on the CSLU kids corpus indicate that ChildAugment holds promise as a simple, acoustics-motivated approach, for improving state-of-the-art deep learning based ASV for children. We achieve up to 12.45% (boys) and 11.96% (girls) relative improvement over the baseline. For reproducibility, we provide the evaluation protocols and codes here.","PeriodicalId":256727,"journal":{"name":"The Journal of the Acoustical Society of America","volume":"10 4","pages":"2221-2232"},"PeriodicalIF":0.0,"publicationDate":"2024-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140437742","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Diversity of sound production and hearing in fishes: Exploring the riddles of communication and sensory biology 鱼类发声和听觉的多样性：探索交流和感官生物学之谜

The Journal of the Acoustical Society of America Pub Date : 2024-01-01 DOI: 10.1121/10.0024243

F. Ladich

{"title":"Diversity of sound production and hearing in fishes: Exploring the riddles of communication and sensory biology","authors":"F. Ladich","doi":"10.1121/10.0024243","DOIUrl":"https://doi.org/10.1121/10.0024243","url":null,"abstract":"My research in fish bioacoustics started in the mid-1980s and comprised the diversity in sound-generating mechanisms and sound production in various contexts such as dyadic contests. I worked on European freshwater and marine fish, but mainly on tropical fish from Southeast Asia (gouramis) and the Amazonian River system (pimelodid, doradid catfishes, piranhas). The diversity of sonic organs raised the question if general patterns of innervation of sonic muscles in vocal fishes exist. Different vocal (sonic) motor nuclei were identified in the brainstem and rostral spinal cord for pectoral and swim bladder vibration mechanisms. In addition, I wanted to find out if vocal fish differ from nonvocal species in hearing abilities. Measurements applying the auditory evoked potential technique revealed a large diversity of auditory sensitivities depending on the presence or lack of accessory hearing structures independently of sound production. Furthermore, I investigated the anatomy, ultrastructure of inner ears, and hearing enhancement by auxiliary hearing structures. Recently, we studied sound-induced motion of swim bladders, auditory ossicles, and otoliths using x-ray phase contrast imaging. A large part of my studies was carried out in cooperation with laboratories in the USA, Germany, Italy, Portugal, and Brasilia which made my research interesting.","PeriodicalId":256727,"journal":{"name":"The Journal of the Acoustical Society of America","volume":"26 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139455188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reviewers of Manuscripts, 2023 2023 年审稿人

The Journal of the Acoustical Society of America Pub Date : 2024-01-01 DOI: 10.1121/10.0024456

James F Lynch

引用次数: 0

Anatomical adventures in the fish auditory medulla 鱼类听觉髓质的解剖学探险

The Journal of the Acoustical Society of America Pub Date : 2023-12-01 DOI: 10.1121/10.0022510

Catherine A. McCormick

引用次数: 0

Structural and functional evolution of the mechanosensory lateral line system of fishes 鱼类机械感觉侧线系统的结构和功能演变

The Journal of the Acoustical Society of America Pub Date : 2023-12-01 DOI: 10.1121/10.0022565

Jacqueline F. Webb

引用次数: 0

Simulations of X-59 sonic thumps and traditional sonic booms propagated around the world for three atmospheric models 三种大气模型模拟 X-59 音爆和传统音爆在全球传播的情况

The Journal of the Acoustical Society of America Pub Date : 2023-10-01 DOI: 10.1121/10.0022946

W. Doebler, V. Sparrow

{"title":"Simulations of X-59 sonic thumps and traditional sonic booms propagated around the world for three atmospheric models","authors":"W. Doebler, V. Sparrow","doi":"10.1121/10.0022946","DOIUrl":"https://doi.org/10.1121/10.0022946","url":null,"abstract":"Propagation simulations of sonic booms from supersonic aircraft through atmospheric data over time at fixed locations provide the opportunity to assess noise exposure statistics for different climate regions. Knowledge of climate-based differences in sonic boom noise exposure statistics is important to ensure that future civil supersonic aircraft noise certification standards are globally applicable and effective. In this presentation, simulated sonic booms from the NASA X-59 Quesst quiet supersonic aircraft and conventional supersonic aircraft were propagated through atmospheric data at 100 locations across the world using PCBoom. Noise exposure statistics are compared for propagation results from three different atmospheric databases (NOAA Global Forecast System, NOAA Climate Forecast System Version 2, and the ECMWF Reanalysis Version 5). These atmospheric models were chosen due to their global coverage, popularity, and database availability. Preliminary statistical models are fit to assess the impact of several factors including flight direction, season, ground elevation, and climate on noise exposure size and loudness. Areas with prevalence of higher noise due to their climate are identified, which could help inform future supersonic aircraft noise standards.","PeriodicalId":256727,"journal":{"name":"The Journal of the Acoustical Society of America","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139325099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Teaching acoustics across multi-disciplines 跨学科声学教学

The Journal of the Acoustical Society of America Pub Date : 2023-10-01 DOI: 10.1121/10.0022930

David A. Brown

引用次数: 0

Time reversal acoustic focusing in a reverberant room: Elongating a focus, and the effect of head-scattering 混响室中的时间反转声聚焦：拉长聚焦和头部散射的影响

The Journal of the Acoustical Society of America Pub Date : 2023-10-01 DOI: 10.1121/10.0023163

Peter J. Beringer, Densil Cabrera, Shuai Lu

引用次数: 0