Pub Date : 2023-12-04Epub Date: 2024-06-04DOI: 10.1121/2.0001894
Zhaoyan Zhang
The vocal folds experience repeated collision during phonation. The resulting contact pressure is often considered to play an important role in vocal fold injury, and has been the focus of many experimental studies. In this study, vocal fold contact pattern and contact pressure during phonation were numerically investigated. The results show that vocal fold contact in general occurs within a horizontal strip on the medial surface, first appearing at the inferior medial surface and propagating upward. Because of the localized and travelling nature of vocal fold contact, sensors of a finite size may significantly underestimate the peak vocal fold contact pressure, particularly for vocal folds of low transverse stiffness. This underestimation also makes it difficult to identify the contact pressure peak in the intraglottal pressure waveform. These results showed that the vocal fold contact pressure reported in previous experimental studies may have significantly underestimated the actual values. It is recommended that contact pressure sensors with a diameter no greater than 0.4 mm are used in future experiments to ensure adequate accuracy in measuring the peak vocal fold contact pressure during phonation.
{"title":"The influence of sensor size on experimental measurement accuracy of vocal fold contact pressure.","authors":"Zhaoyan Zhang","doi":"10.1121/2.0001894","DOIUrl":"10.1121/2.0001894","url":null,"abstract":"<p><p>The vocal folds experience repeated collision during phonation. The resulting contact pressure is often considered to play an important role in vocal fold injury, and has been the focus of many experimental studies. In this study, vocal fold contact pattern and contact pressure during phonation were numerically investigated. The results show that vocal fold contact in general occurs within a horizontal strip on the medial surface, first appearing at the inferior medial surface and propagating upward. Because of the localized and travelling nature of vocal fold contact, sensors of a finite size may significantly underestimate the peak vocal fold contact pressure, particularly for vocal folds of low transverse stiffness. This underestimation also makes it difficult to identify the contact pressure peak in the intraglottal pressure waveform. These results showed that the vocal fold contact pressure reported in previous experimental studies may have significantly underestimated the actual values. It is recommended that contact pressure sensors with a diameter no greater than 0.4 mm are used in future experiments to ensure adequate accuracy in measuring the peak vocal fold contact pressure during phonation.</p>","PeriodicalId":88302,"journal":{"name":"Proceedings of meetings on acoustics. Acoustical Society of America","volume":"52 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11173356/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141319201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
When focused to a small spot size in air, a sufficiently energetic laser pulse initiates a rapidly expanding plasma. After a delay, a shockwave detaches from the plasma boundary and propagates. General features of the shockwaves can be deduced from condenser microphone measurements. However, the minimum range is limited by damage thresholds, and the presence of the microphone introduces a number of measurement artifacts. Distortion of the signal is caused by diffraction around the sensor, and the limited bandwidth does not allow rise times to be correctly quantified. In contrast, optical interferometry is a nonintrusive diagnostic for quantifying shockwave characteristics. In this study, a Nd:YAG laser is focused through a converging lens in order to generate laser-induced shockwaves. By using a variable attenuator, four laser energy outputs are examined: 25, 50, 75, and 100% of the maximum energy transmission. Heterodyne Mach–Zehnder interferometer measurements are made from 10 mm to 200 mm from the focal point of the lens. Virtual velocity signals, proportional to the time derivative of optical phase differences, are used to estimate density and pressure time histories, along with peak pressure as a function of distance.
{"title":"Interferometric measurements of laser-induced shockwaves in air","authors":"Carl R. Hart, G. Lyons","doi":"10.1121/2.0001647","DOIUrl":"https://doi.org/10.1121/2.0001647","url":null,"abstract":"When focused to a small spot size in air, a sufficiently energetic laser pulse initiates a rapidly expanding plasma. After a delay, a shockwave detaches from the plasma boundary and propagates. General features of the shockwaves can be deduced from condenser microphone measurements. However, the minimum range is limited by damage thresholds, and the presence of the microphone introduces a number of measurement artifacts. Distortion of the signal is caused by diffraction around the sensor, and the limited bandwidth does not allow rise times to be correctly quantified. In contrast, optical interferometry is a nonintrusive diagnostic for quantifying shockwave characteristics. In this study, a Nd:YAG laser is focused through a converging lens in order to generate laser-induced shockwaves. By using a variable attenuator, four laser energy outputs are examined: 25, 50, 75, and 100% of the maximum energy transmission. Heterodyne Mach–Zehnder interferometer measurements are made from 10 mm to 200 mm from the focal point of the lens. Virtual velocity signals, proportional to the time derivative of optical phase differences, are used to estimate density and pressure time histories, along with peak pressure as a function of distance.","PeriodicalId":88302,"journal":{"name":"Proceedings of meetings on acoustics. Acoustical Society of America","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48215692","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}
{"title":"Acoustical worship ambience of Spanish Franciscans built churches: Nossa Senhora do Pilar (Goa) and Mission Concepcion (Texas)","authors":"M. A. Tavares, S. Wiseman","doi":"10.1121/2.0001744","DOIUrl":"https://doi.org/10.1121/2.0001744","url":null,"abstract":"","PeriodicalId":88302,"journal":{"name":"Proceedings of meetings on acoustics. Acoustical Society of America","volume":"260 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"63521342","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}
Logan T. Mathews, Mark C. Anderson, Carson D. Gardner, Bradley W. McLaughlin, Brooke M. Hinds, Megan R. McCullah-Boozer, Lucas K. Hall, Kent L. Gee
{"title":"An overview of acoustical measurements made of the Atlas V JPSS-2 rocket launch","authors":"Logan T. Mathews, Mark C. Anderson, Carson D. Gardner, Bradley W. McLaughlin, Brooke M. Hinds, Megan R. McCullah-Boozer, Lucas K. Hall, Kent L. Gee","doi":"10.1121/2.0001768","DOIUrl":"https://doi.org/10.1121/2.0001768","url":null,"abstract":"","PeriodicalId":88302,"journal":{"name":"Proceedings of meetings on acoustics. Acoustical Society of America","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135446340","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}
{"title":"When clear speech does not enhance memory: Effects of speaking style, voice naturalness, and listener age","authors":"Nicholas B. Aoki, Georgia Zellou","doi":"10.1121/2.0001766","DOIUrl":"https://doi.org/10.1121/2.0001766","url":null,"abstract":"","PeriodicalId":88302,"journal":{"name":"Proceedings of meetings on acoustics. Acoustical Society of America","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135783307","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}
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Keegan Eveland, Robert Stevenson, Paul Domski, Dieter Vanderelst, Laura Kloepper
{"title":"Spatial differences in soundscape for bats on the edge versus the center of a bat swarm","authors":"Keegan Eveland, Robert Stevenson, Paul Domski, Dieter Vanderelst, Laura Kloepper","doi":"10.1121/2.0001789","DOIUrl":"https://doi.org/10.1121/2.0001789","url":null,"abstract":"","PeriodicalId":88302,"journal":{"name":"Proceedings of meetings on acoustics. Acoustical Society of America","volume":"72 11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136257726","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}
{"title":"Serial and parallel implementations of the fast nearfield methods for continuous-wave and transient pressure calculations","authors":"Jacob S. Honer, Robert J. McGough","doi":"10.1121/2.0001756","DOIUrl":"https://doi.org/10.1121/2.0001756","url":null,"abstract":"","PeriodicalId":88302,"journal":{"name":"Proceedings of meetings on acoustics. Acoustical Society of America","volume":"113 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136257734","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}
{"title":"The impact of material memory on acoustic absorption in viscoelastic layers","authors":"Eric Abercrombie, J. Gregory McDaniel","doi":"10.1121/2.0001746","DOIUrl":"https://doi.org/10.1121/2.0001746","url":null,"abstract":"","PeriodicalId":88302,"journal":{"name":"Proceedings of meetings on acoustics. Acoustical Society of America","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135600355","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}
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