{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2023,7,20]],"date-time":"2023-07-20T02:40:05Z","timestamp":1689820805745},"reference-count":0,"publisher":"Acoustical Society of America (ASA)","issue":"2","content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[1978,2,1]]},"abstract":"<jats:p>In cat, a small tympanic membrane (TM) perforation produces a low-frequency loss\u2014in terms of sound pressure changes (\u0394SP) in front of the TM re a 10-\u03bcV round window cochlear microphonic (RW CM) \u2014that varies inversely with frequency at a rate of 12 dB\/octave with a surgically shortened external auditory meatus (EAM). Losses were determined at the outer opening (\u0394SP00) and at the TM (\u0394SPTM) of four artificial EAM\u2019s of various lengths, volumes, and leakiness. In the low-frequency region, a leaky EAM produced a flat loss. In the midfrequency region, the flatness of losses was attributable to (1) the length of the EAM and (2) the location at which the loss was determined. EAM volume was not related to the configuration of the loss. Losses, under all conditions, were always identical in shape and magnitude for the open and closed systems. Clinically, hearing losses due to TM perforations are essentially frequency independent, especially in the low frequencies. The relation between voltage changes (\u0394V) across the transducer and losses with different EAM\u2019s suggests that the discrepency between audiometric results and CM losses\u2014at least in the high and midfrequencies\u2014may be due to the use of precalibrated SPL\u2019s in clinical audiometry.<\/jats:p>","DOI":"10.1121\/1.381735","type":"journal-article","created":{"date-parts":[[2005,10,3]],"date-time":"2005-10-03T22:31:17Z","timestamp":1128378677000},"page":"436-441","update-policy":"http:\/\/dx.doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":7,"title":["Tympanic membrane perforations in cats: Configurations of losses with and without ear canal extensions"],"prefix":"10.1121","volume":"63","author":[{"given":"Barbara","family":"Kruger","sequence":"first","affiliation":[{"name":"Department of Otolaryngology, College of Physicians and Surgeons, Columbia University, New York, New York 10032"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Juergen","family":"Tonndorf","sequence":"additional","affiliation":[{"name":"Department of Otolaryngology, College of Physicians and Surgeons, Columbia University, New York, New York 10032"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"231","container-title":["The Journal of the Acoustical Society of America"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/pubs.aip.org\/asa\/jasa\/article-pdf\/63\/2\/436\/6129482\/436_1_online.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"syndication"},{"URL":"https:\/\/pubs.aip.org\/asa\/jasa\/article-pdf\/63\/2\/436\/6129482\/436_1_online.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,7,20]],"date-time":"2023-07-20T02:14:09Z","timestamp":1689819249000},"score":1,"resource":{"primary":{"URL":"https:\/\/pubs.aip.org\/jasa\/article\/63\/2\/436\/681507\/Tympanic-membrane-perforations-in-cats"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1978,2,1]]},"references-count":0,"journal-issue":{"issue":"2","published-print":{"date-parts":[[1978,2,1]]}},"URL":"https:\/\/doi.org\/10.1121\/1.381735","relation":{},"ISSN":["0001-4966","1520-8524"],"issn-type":[{"value":"0001-4966","type":"print"},{"value":"1520-8524","type":"electronic"}],"subject":[],"published-other":{"date-parts":[[1978,2]]},"published":{"date-parts":[[1978,2,1]]}}}