{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,29]],"date-time":"2026-06-29T19:21:55Z","timestamp":1782760915484,"version":"3.54.5"},"reference-count":2,"publisher":"S. Karger AG","issue":"2","license":[{"start":{"date-parts":[[2000,1,1]],"date-time":"2000-01-01T00:00:00Z","timestamp":946684800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/www.karger.com\/Services\/SiteLicenses"},{"start":{"date-parts":[[2000,1,1]],"date-time":"2000-01-01T00:00:00Z","timestamp":946684800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.karger.com\/Services\/SiteLicenses"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Audiol Neurotol"],"published-print":{"date-parts":[[2000]]},"abstract":"<jats:p>Morphological studies of age-related changes in the tympanic membrane have suggested a decreased elasticity for increasing age, whereas age-related changes in admittance measured by tympanometry have revealed inconsistent results. In this study we report on the viscoelastic properties of the middle ear system by means of a new method in two different age groups. This method measures hysteresis (\u03bcJ), which describes the viscous properties of the system, and compliance (mm&lt;sup&gt;3&lt;\/sup&gt;\/kPa) reflecting its elasticity. Moreover, P&lt;sub&gt;ec0&lt;\/sub&gt; (kPa) was recorded, which corresponds to middle ear pressure measured by tympanometry. Recordings were made in a group of 30 older normal subjects (mean age 77 years) and results were compared to previous findings in a group of 39 younger normal subjects (mean age 29). Hysteresis was markedly decreased in the older normal group compared to the younger one (p = 0.057). This may reflect morphological changes previously reported in the tympanic membrane and can be related to theoretical considerations on tympanic membrane rupture pressures. Compliance and P&lt;sub&gt;ec0&lt;\/sub&gt; were not influenced by variation in age (p = 0.645 and 0.966).<\/jats:p>","DOI":"10.1159\/000013867","type":"journal-article","created":{"date-parts":[[2003,4,15]],"date-time":"2003-04-15T15:43:24Z","timestamp":1050421404000},"page":"53-58","source":"Crossref","is-referenced-by-count":19,"title":["Mechanics of the Middle Ear System: Age-Related Changes in Viscoelastic Properties"],"prefix":"10.1159","volume":"5","author":[{"given":"Michael","family":"Gaihede","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Birger","family":"Koefoed-Nielsen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"127","published-online":{"date-parts":[[2000,3,13]]},"reference":[{"key":"ref1","doi-asserted-by":"publisher","DOI":"10.1080\/00016480260000058"},{"key":"ref2","doi-asserted-by":"publisher","DOI":"10.1080\/000164801750388117"}],"container-title":["Audiology and Neurotology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.karger.com\/Article\/Pdf\/13867","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/www.karger.com\/Article\/Pdf\/13867","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,4,24]],"date-time":"2025-04-24T05:06:34Z","timestamp":1745471194000},"score":1,"resource":{"primary":{"URL":"https:\/\/karger.com\/article\/doi\/10.1159\/000013867"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2000]]},"references-count":2,"journal-issue":{"issue":"2","published-online":{"date-parts":[[2000,4,1]]}},"URL":"https:\/\/doi.org\/10.1159\/000013867","archive":["Portico"],"relation":{},"ISSN":["1420-3030","1421-9700"],"issn-type":[{"value":"1420-3030","type":"print"},{"value":"1421-9700","type":"electronic"}],"subject":[],"published":{"date-parts":[[2000]]}}}