{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,8]],"date-time":"2025-10-08T16:41:44Z","timestamp":1759941704585},"reference-count":43,"publisher":"Acoustical Society of America (ASA)","issue":"6","content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2003,12,1]]},"abstract":"<jats:p>Past work has shown that distortion product otoacoustic emission (DPOAE) (2f1\u2013f2) ipsilateral suppression and input\/output (I\/O) characteristics are not adult-like in prematurely born neonates [Abdala, J. Acoust. Soc. Am. 110, 1465\u20131476 (2001)]. These age differences are most pronounced at f2=6000\u200aHz and have been interpreted to indicate a subtle immaturity in human cochlear function prior to term birth. It is still not clear, however, whether term-born neonates are completely adult-like in cochlear function. To study this question, DPOAE suppression and I\/O functions for f2=6000\u200aHz were measured in a group of prematurely born neonates at weekly intervals over a period of 7\u20138-weeks, a group of normal-hearing adults, and during a one-time test session in a group of term-born neonates. Results show that there was no significant change in suppression tuning, suppression growth, and various I\/O characteristics across test session for premature neonates, but there was an age-group effect; even once prematurely born neonates reached the equivalence of term-like status (38\u201340-weeks postconceptional weeks), they continued to show narrower suppression tuning than adults, shallower suppression growth for low-frequency side suppressor tones, and an elevated amplitude saturation plateau on the I\/O function. Term-born neonates showed DPOAE results that were comparable to those measured from premature neonates and unlike adult findings. These results suggest that a subtle immaturity in cochlear function persists into the postnatal period.<\/jats:p>","DOI":"10.1121\/1.1625930","type":"journal-article","created":{"date-parts":[[2003,12,12]],"date-time":"2003-12-12T16:27:42Z","timestamp":1071246462000},"page":"3239-3250","update-policy":"http:\/\/dx.doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":21,"title":["A longitudinal study of distortion product otoacoustic emission ipsilateral suppression and input\/output characteristics in human neonates"],"prefix":"10.1121","volume":"114","author":[{"given":"Carolina","family":"Abdala","sequence":"first","affiliation":[{"name":"Children\u2019s Auditory Research and Evaluation Center, House Ear Institute, 2100 West Third Street, Los Angeles, California\u200990057"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"231","published-online":{"date-parts":[[2003,12,2]]},"reference":[{"key":"2023071404044498000_abd95","doi-asserted-by":"crossref","first-page":"2394","DOI":"10.1121\/1.411961","article-title":"Frequency contribution to the click-evoked auditory brainstem response in human adults and infants","volume":"97","year":"1995","journal-title":"J. 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