{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,2,21]],"date-time":"2025-02-21T08:48:10Z","timestamp":1740127690798,"version":"3.37.3"},"reference-count":12,"publisher":"Acoustical Society of America (ASA)","issue":"3","funder":[{"DOI":"10.13039\/501100005795","name":"Chang Gung Memorial Hospital, Linkou","doi-asserted-by":"publisher","award":["CMRPD2B0021, CMRPD2B0022, CMRPD2B0023"],"award-info":[{"award-number":["CMRPD2B0021, CMRPD2B0022, CMRPD2B0023"]}],"id":[{"id":"10.13039\/501100005795","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2018,3,1]]},"abstract":"<jats:p>The human external auditory canal can become deformed when the mandible moves, and this changes the sound field in the external auditory canal. This study measured the sound field gain in the external auditory canal while varying mouth-opening in three levels. The mandible was fixed at the 1\/3, the 2\/3, and the maximal mouth-opening levels. Seven 65-dB tones of 200, 500, 1000, 2000, 4000, 6000, and 8000\u2009Hz, which are the sound pressure level and frequency range when people are talking at a normal level, were adopted as the sound stimulus to measure sound field gains at 5, 10, 15, and 20\u2009mm to the interior of the external auditory canal. The results show that, with the exception of the 1.25\u2009dB decrease from 12.96 to 11.71\u2009dB at a depth of 5\u2009mm with a stimulus at 8000\u2009Hz, the differences in the sound field gain at the other depths and stimulus frequencies were within 1 dB and were not statistically significant. These results suggest that mouth-opening level has no effect on the measurement of the sound field in the external auditory canal.<\/jats:p>","DOI":"10.1121\/1.5026692","type":"journal-article","created":{"date-parts":[[2018,3,15]],"date-time":"2018-03-15T19:23:10Z","timestamp":1521141790000},"page":"1451-1457","update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":1,"title":["Effect of mouth-opening levels on sound field gain in the ear canal"],"prefix":"10.1121","volume":"143","author":[{"given":"Jen-Fang","family":"Yu","sequence":"first","affiliation":[{"name":"Graduate Institute of Medical Mechatronics, Chang Gung University 1 , Number 259, Wenhua 1st Road, Kwei-Shan 333, Taoyuan City, Taiwan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hsiang-Chi","family":"Hsien","sequence":"additional","affiliation":[{"name":"Graduate Institute of Medical Mechatronics, Chang Gung University 1 , Number 259, Wenhua 1st Road, Kwei-Shan 333, Taoyuan City, Taiwan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kun-Che","family":"Lee","sequence":"additional","affiliation":[{"name":"Graduate Institute of Medical Mechatronics, Chang Gung University 1 , Number 259, Wenhua 1st Road, Kwei-Shan 333, Taoyuan City, Taiwan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jimg-Hong","family":"Xiao","sequence":"additional","affiliation":[{"name":"Taiouan Interdisciplinary Otolaryngology Laboratory, Chang Gung University 2 , Number 259, Wenhua 1st Road, Kwei-Shan 333, Taoyuan City, Taiwan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hsiu-Hui","family":"Chiu","sequence":"additional","affiliation":[{"name":"Taiouan Interdisciplinary Otolaryngology Laboratory, Chang Gung University 2 , Number 259, Wenhua 1st Road, Kwei-Shan 333, Taoyuan City, Taiwan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hsiang-Hsi","family":"Hong","sequence":"additional","affiliation":[{"name":"Department of Periodontology, Chang Gung Memorial Hospital 3 , 5 Fu-Shin Street, Kwei-Shan 333, Taoyuan City, Taiwan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yu-Fu","family":"Shen","sequence":"additional","affiliation":[{"name":"Department of Prosthodontics, Chang Gung Memorial Hospital 4 , 5 Fu-Shin Street, Kwei-Shan 333, Taoyuan City, Taiwan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ying-Chin","family":"Peng","sequence":"additional","affiliation":[{"name":"Department of Prosthodontics, Chang Gung Memorial Hospital 4 , 5 Fu-Shin Street, Kwei-Shan 333, Taoyuan City, Taiwan"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"231","published-online":{"date-parts":[[2018,3,15]]},"reference":[{"key":"2023071701322766400_c1","first-page":"411","article-title":"Theoretical and applied external ear acoustics","volume":"8","year":"1997","journal-title":"J. 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