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Acoustic analyses were carried out on spontaneous speech produced during a problem-solving task (diapix) carried out by talker pairs in different listening conditions. There were 83 talkers of Southern British English. Fifty-seven talkers were OAs aged 65\u201384, 30 older adults with normal hearing (OANH), and 27 older adults with hearing loss (OAHL) [mean pure tone average (PTA) 0.250\u20134\u2009kHz: 27.7\u2009dB HL]. Twenty-six talkers were younger adults (YA) aged 18\u201326 with normal hearing. Participants were recorded while completing the diapix task with a conversational partner (YA of the same sex) when (a) both talkers heard normally (NORM), (b) the partner had a simulated hearing loss, and (c) both talkers heard babble noise. Irrespective of hearing status, there were age-related differences in some acoustic characteristics of YA and OA speech produced in NORM, most likely linked to physiological factors. In challenging conditions, while OANH talkers typically patterned with YA talkers, OAHL talkers made adaptations more consistent with an increase in vocal effort. The study suggests that even mild presbycusis in healthy OAs can affect the speech adaptations made to maintain effective communication.<\/jats:p>","DOI":"10.1121\/1.5053218","type":"journal-article","created":{"date-parts":[[2018,9,12]],"date-time":"2018-09-12T18:53:09Z","timestamp":1536778389000},"page":"1331-1346","update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":34,"title":["Clear speech adaptations in spontaneous speech produced by young and older adults"],"prefix":"10.1121","volume":"144","author":[{"given":"Valerie","family":"Hazan","sequence":"first","affiliation":[{"name":"Department of Speech Hearing and Phonetic Sciences, University College London , 2 Wakefield Street, London WC1N 1PF, United Kingdom"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Outi","family":"Tuomainen","sequence":"additional","affiliation":[{"name":"Department of Speech Hearing and Phonetic Sciences, University College London , 2 Wakefield Street, London WC1N 1PF, United Kingdom"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jeesun","family":"Kim","sequence":"additional","affiliation":[{"name":"The MARCS Institute, Western Sydney University , Locked Bag 1797, Penrith, New South Wales 2751, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christopher","family":"Davis","sequence":"additional","affiliation":[{"name":"The MARCS Institute, Western Sydney University , Locked Bag 1797, Penrith, New South Wales 2751, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Benjamin","family":"Sheffield","sequence":"additional","affiliation":[{"name":"Audiology and Speech-Pathology Center, Walter Reed National Military Medical Center , Bethesda, 4494 North Palmer Road, Bethesda, Maryland 20889, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Douglas","family":"Brungart","sequence":"additional","affiliation":[{"name":"Audiology and Speech-Pathology Center, Walter Reed National Military Medical Center , Bethesda, 4494 North Palmer Road, Bethesda, Maryland 20889, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"231","published-online":{"date-parts":[[2018,9,12]]},"reference":[{"key":"2023072801384276700_c1","doi-asserted-by":"publisher","first-page":"351","DOI":"10.1177\/002383099103400404","article-title":"The HCRC Map Task Corpus","volume":"34","year":"1991","journal-title":"Lang. 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