{"title":"Older adults' perception of urgency: Effects of simple temporal patterns in auditory signals.","authors":"Mengjun Wen, Hui Ma, Chao Wang","doi":"10.1121/10.0039376","DOIUrl":"https://doi.org/10.1121/10.0039376","url":null,"abstract":"<p><p>This study explored the impact of simple alternating on/off temporal sound patterns on urgency perception in older and young groups, with varying pulse rates and duty cycles. Urgency judgments and reaction times were collected across age groups. Under equal sound pressure level conditions, older adults tended to perceive sounds with lower pulse rates (around 8.84 Hz) as most urgent, while young participants showed peak urgency at higher pulse rates (around 25.0 Hz). Sounds with a 50% duty cycle were generally rated as more urgent, particularly among older adults. After loudness equalization, although temporal features such as pulse rate and duty cycle continued to influence urgency preferences, the previously observed U-shaped trends were attenuated, especially in older adults, suggesting that loudness perception may mediate age-related differences in temporal cue processing. These findings highlight perceptual differences in urgency across age groups and underscore the importance of considering both temporal and loudness cues when designing auditory alerts for older populations.</p>","PeriodicalId":17168,"journal":{"name":"Journal of the Acoustical Society of America","volume":"158 3","pages":"2319-2330"},"PeriodicalIF":2.3,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145125033","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":"Localization of sound in rooms VI: Duplex theory.","authors":"William M Hartmann, Brad Rakerd, Zane D Crawford","doi":"10.1121/10.0039111","DOIUrl":"10.1121/10.0039111","url":null,"abstract":"<p><p>Six human listeners attempted to locate the sources of sine tones in three room environments with greatly different reverberation times. During the experiment, probe microphones recorded the signals in the listeners' ear canals in order to measure the interaural time differences (ITD) and the interaural level differences (ILD) that enable sound localization. Comparison of the interaural differences with listener localization responses showed the dominant weight of ITD at low frequencies and of ILD at high frequencies, consistent with Duplex theory. Equal ITD and ILD weights occurred at a crossover frequency between 400 and 600 Hz, apparently independent of room environment. Comparing results for near and far sources revealed dramatic effects of source distance on the correlations between interaural differences and source azimuths but little effect on the correlations between interaural differences and listener responses. Front-back reversals were rare for young listeners but frequent for older listeners. The experiment for intermediate reverberation time was repeated with headphones for the same six listeners using listener-specific signals from the rooms measurements. The frequency dependence of the weights for interaural cues was similar to that found in rooms.</p>","PeriodicalId":17168,"journal":{"name":"Journal of the Acoustical Society of America","volume":"158 3","pages":"2048-2061"},"PeriodicalIF":2.3,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145040556","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":"Seismoacoustic inversion using posteriors.","authors":"Christopher F Mecklenbräuker","doi":"10.1121/10.0039094","DOIUrl":"https://doi.org/10.1121/10.0039094","url":null,"abstract":"<p><p>The Reflections series takes a look back on historical articles from The Journal of the Acoustical Society of America that have had a significant impact on the science and practice of acoustics.</p>","PeriodicalId":17168,"journal":{"name":"Journal of the Acoustical Society of America","volume":"158 3","pages":"R5-R6"},"PeriodicalIF":2.3,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144958586","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":"Elucidating ultrasound imaging of /ɹ/ tongue shapes using full-wave numerical simulationsa).","authors":"Sarah R Li, Suzanne Boyce, T Douglas Mast","doi":"10.1121/10.0039100","DOIUrl":"https://doi.org/10.1121/10.0039100","url":null,"abstract":"<p><p>Midsagittal ultrasound images depict much of the tongue surface from root to tip, providing important articulatory information about tongue shape. However, portions of the tip can be obscured due to shadowing from the mandible bone and sublingual airspace. Also, tongue curvature or grooving within the elevational beam width can cause ambiguous or double-edge artifacts that obfuscate the midsagittal tongue surface. Because ensuing misinterpretations of tongue shape may negatively affect clinical and scientific assessments of speakers' articulation, this study characterizes causes of imaging artifacts and validates best practices for interpretation. Segmentations of /ɹ/ tongue shapes from magnetic resonance images (MRI) were compared to simulated ultrasound images, obtained by modeling full-wave acoustic wave propagation through segmented tissue models using the k-Wave toolbox. Acoustic parameters were adjusted to allow for accurate yet efficient simulations. The extent of tongue tip visibly missing from simulated images varied significantly across categories of /ɹ/ tongue shapes. Ambiguous edge artifacts occurred in 85% of parasagittal images, supporting the guideline to check midsagittal transducer placement when ambiguous edges are observed. The ground-truth tongue surface corresponded to local brightness maxima within the visible tongue contour. For 92% of ambiguous edges, the most proximal brightness maximum corresponded to the midsagittal tongue surface.</p>","PeriodicalId":17168,"journal":{"name":"Journal of the Acoustical Society of America","volume":"158 3","pages":"1663-1674"},"PeriodicalIF":2.3,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144958593","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":"Simulation of unilateral and bilateral cochlear implants on spatial speech-in-noise tasks.","authors":"Mengchao Zhang, Christine du Plessis","doi":"10.1121/10.0039099","DOIUrl":"https://doi.org/10.1121/10.0039099","url":null,"abstract":"<p><p>The current study simulated bilateral and unilateral cochlear implant (CI) processing using a channel vocoder with dense tonal carriers (\"SPIRAL\") in 13 normal-hearing listeners. Their performance of recognizing spatial speech-in-noise was measured under the effects of three masker locations (0°, +90°, and -90°; target at 0°) and three types of maskers (steady-state noise, speech-modulated noise, and a single-talker interferer) where the maskers contained different levels of energetic and informational masking. The stimuli were spatialized using the head-related impulse responses recorded from behind-the-ear microphones of hearing aids. The results showed that simulated users of bilateral CIs displayed binaural benefits (i.e., binaural summation and binaural squelch) in the maskers with pure energetic masking or with additional modulation masking but not in the masker with primarily language-based informational masking. Binaural benefits observed in the simulation did not consistently agree with the findings in real CI users. The use of SPIRAL vocoder allows further parameterization research into pinning down the factors that affect binaural benefits in bilateral CIs.</p>","PeriodicalId":17168,"journal":{"name":"Journal of the Acoustical Society of America","volume":"158 3","pages":"1653-1662"},"PeriodicalIF":2.3,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144958598","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":"Research on time-frequency multi-scale characteristics of high-power giant magnetostrictive underwater transducers considering hysteresis nonlinearity.","authors":"Husheng Li, Bing Gao, Zhixing He, Mingzhi Yang, Wenhu Yang, Chaoyi Peng","doi":"10.1121/10.0039102","DOIUrl":"https://doi.org/10.1121/10.0039102","url":null,"abstract":"<p><p>High-power giant magnetostrictive underwater transducers are integral to underwater active sonar detection systems due to their high energy density, rapid dynamic response, and significant output force. However, these transducers exhibit complex nonlinear dynamic hysteresis behavior, which is influenced by the coupling of electric, magnetic, mechanical, and acoustic fields. This complexity presents considerable challenges in accurately characterizing their output properties. To address this issue, a comprehensive equivalent circuit model considering the hysteresis nonlinearity has been developed to accurately represent the time-frequency characteristics of the transducer. Initially, the proposed model utilizes an analytical equation to calculate both the bias magnetic field and the AC-driven magnetic field, thereby facilitating the analysis of the magnetic field distribution within the high-power giant magnetostrictive underwater transducer (HGMUT). Subsequently, an enhanced Preisach hysteresis model is employed to characterize the dynamic magnetic-mechanical strain relationship of the giant magnetostrictive material rods. Following this, a dynamic equation is established to ascertain the output displacement and force of the transducer. Moreover, a comprehensive equivalent circuit that includes mechanical-acoustic coupling is constructed to analyze the frequency domain transmitting current response and the time-domain acoustic signal of the transducer. Finally, a prototype of the high-power transducer has been successfully fabricated and tested, achieving a resonant frequency of approximately 1 kHz and a maximum transmitting current response of 187 dB. The experimental results indicate that the proposed model aligns closely with the experimental data, effectively capturing and predicting the output time-frequency characteristics of the transducer.</p>","PeriodicalId":17168,"journal":{"name":"Journal of the Acoustical Society of America","volume":"158 3","pages":"1675-1687"},"PeriodicalIF":2.3,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144958650","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":"Particle motion polarization of offshore fish vocalizations versus ambient and ship noise.","authors":"Ian T Jones, Julien Bonnel, Julien Flamant","doi":"10.1121/10.0039105","DOIUrl":"10.1121/10.0039105","url":null,"abstract":"<p><p>Acoustic particle motion is the primary cue for fish hearing and a vector quantity that contains polarization information (including directionality) relevant to the directional hearing abilities of fishes. Polarization metrics, including ellipse orientation angle, ellipticity angle, and degree of polarization, have been recently applied to describe particle motion polarization in physical acoustical oceanography studies and have yet to be applied to in situ biological signals. This study harnessed data from a compact orthogonal hydrophone array deployed on the seafloor offshore of Florida (part of the Atlantic Deepwater Ecosystem Observatory Network) to investigate particle motion polarization properties of unidentified acoustic fish signals relative to ambient and ship noise. These properties described bivariate particle motion in a vertical plane formed by a source-receiver axis and orthogonal vertical axis. Particle motion of fish signals had more horizontal orientation than ambient noise and ship noise at the closest point of approach, which were more vertically oriented. Fish signals had narrower (small ellipticity) and more temporally stable (high degree of polarization) particle motion ellipses than ship and ambient noise. Applications of this analysis framework to fish bioacoustics studies and relevance of polarization properties to fish directional hearing and sound localization capacity are discussed.</p>","PeriodicalId":17168,"journal":{"name":"Journal of the Acoustical Society of America","volume":"158 3","pages":"1723-1736"},"PeriodicalIF":2.3,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144958583","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":"Ill-posed analysis and regularized estimation for seafloor geodetic acoustic single-difference positioning.","authors":"Mingzhen Xin, Xianqing Zhao, Fanlin Yang, Yu Luo, Chongming Wang, Minze Li","doi":"10.1121/10.0037071","DOIUrl":"https://doi.org/10.1121/10.0037071","url":null,"abstract":"<p><p>The single-difference positioning method could eliminate the systematic error of long periods, which is one of the major factors affecting the seafloor geodetic acoustic positioning accuracy. Due to the poor observation geometry in short observation time, there is collinearity in the coefficient matrix. Therefore, a small observation error may lead to a large error in the least square solution, which is the ill-posed problem of single-difference positioning. The spatial distribution of the condition numbers of single-difference positioning with different tracks and heaves is analyzed. The circular tracks with almost equal distance measurements will cause serious complex collinearity, and the optimization of observation structure can reduce the ill-posed degree of single-difference positioning. For the unavoidable ill-posed problem of single-difference positioning, L-curve Liu type method is proposed. By calculating the maximum curvature point of L-curve composed of mean square error and residual two norm, the parameter optimization and estimation optimization of Liu-type estimation are realized. Through the experiments in Panglong Lake and South China Sea, it is verified that the single-difference positioning helps to eliminate the effect of systematic errors, and the proposed L-curve Liu type method can reduce the effect of ill-posed problem of single-difference positioning.</p>","PeriodicalId":17168,"journal":{"name":"Journal of the Acoustical Society of America","volume":"158 3","pages":"1976-1988"},"PeriodicalIF":2.3,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145030231","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}
Andria K Salas, Michele A Sims, Craig A Harms, Wendy E D Piniak, T Aran Mooney
{"title":"Temporary threshold shifts in the Eastern painted turtle (Chrysemys picta picta) in response to narrowband underwater noise exposures.","authors":"Andria K Salas, Michele A Sims, Craig A Harms, Wendy E D Piniak, T Aran Mooney","doi":"10.1121/10.0039241","DOIUrl":"https://doi.org/10.1121/10.0039241","url":null,"abstract":"<p><p>Sound is important to many turtle species, emphasizing the need for data-driven predictive models of acoustic impacts of noise pollution. Freshwater turtles experience temporary threshold shifts (TTSs) and data of the specific frequencies and duration inducing hearing loss are critical for TTS modeling. Three adult female Eastern painted turtles (Chrysemys picta pica) were exposed to 1/6-octave-narrowband noise centered at 200 or 400 Hz at varying durations and amplitudes (received sound exposure levels, 136-174 dB re 1 μPa2 s). Underwater auditory thresholds were measured at each band's center frequency and 1/2 octave above these frequencies using auditory evoked potential methodology. A comparison of post-exposure to control thresholds revealed that all turtles experienced TTS at all four test frequencies. Turtles showed greater susceptibility to the 400-Hz centered narrowband, a frequency of higher auditory sensitivity. Greater TTS and a lower TTS onset was observed at 570 Hz compared to 400 Hz, revealing an upward frequency shift in TTS compared to the exposure frequencies. Auditory sensitivity recovered within <1 h or by two days post-exposure, but one turtle showed TTS lasting multiple weeks. Narrowband TTS growth aligned with broadband empirical models, suggesting TTS predictions may be similar for these two noise types.</p>","PeriodicalId":17168,"journal":{"name":"Journal of the Acoustical Society of America","volume":"158 3","pages":"2508-2522"},"PeriodicalIF":2.3,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145137840","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":"Acoustic analysis of Taylor Swift's dialect changes across different eras of her careera).","authors":"Miski Mohamed, Matthew B Winn","doi":"10.1121/10.0039052","DOIUrl":"10.1121/10.0039052","url":null,"abstract":"<p><p>Across different stages of her career, Taylor Swift has moved in and out of communities that have distinct regional or socio-cultural dialects. Her extensive history of media interactions offers a rare opportunity to observe longitudinal dialect change. Here, we show that Swift's conversational speech exhibited notable signatures of Southern accent during her time in Nashville, including a shortened trajectory for /aɪ/ vowels (\"ride\" becomes similar to \"rod\") and exaggerated fronting of the /u/ vowel, even outside of coronal phonetic contexts. These features were lost after her return to Philadelphia, and hypercorrected upon her relocation to New York City, where she expanded the distinction between low-back vowels (in words like \"cot\" and \"caught\"). She also lowered her voice pitch (F0) during her time in New York City, coincident with her increased visibility speaking on issues of social change. These results, which would be virtually impossible to observe in a controlled laboratory study, have broad implications for our understanding of the combined influences of place, profession, and leadership goals on an individual's dialect adaptation later in life, suggesting that the ways people use language for conveying identity and community belonging are malleable within specific timeframes and goals.</p>","PeriodicalId":17168,"journal":{"name":"Journal of the Acoustical Society of America","volume":"158 3","pages":"2278-2289"},"PeriodicalIF":2.3,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145125053","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}