{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,19]],"date-time":"2025-10-19T15:41:09Z","timestamp":1760888469949,"version":"3.40.4"},"reference-count":12,"publisher":"S. Karger AG","issue":"3","license":[{"start":{"date-parts":[[2010,10,8]],"date-time":"2010-10-08T00:00:00Z","timestamp":1286496000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/www.karger.com\/Services\/SiteLicenses"},{"start":{"date-parts":[[2010,10,8]],"date-time":"2010-10-08T00:00:00Z","timestamp":1286496000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.karger.com\/Services\/SiteLicenses"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Folia Phoniatr Logop"],"published-print":{"date-parts":[[2011]]},"abstract":"<jats:p>&lt;i&gt;Objective:&lt;\/i&gt; The purpose of this study was to explore the possibility of using Lyapunov exponents (LE) to evaluate the voice and speech in cleft palate (CP) patients. &lt;i&gt;Subjects and Methods:&lt;\/i&gt; Fifty healthy adults (25 males and 25 females) and 17 adult patients (10 males and 7 females) with repaired CP, who had no hypernasality, were enrolled. Five Japanese vowels were recorded at 44.1 kHz. Nasalance scores were measured simultaneously. The first LE was computed for each 1-second interval, and the mean for the first LE from all intervals (mLE&lt;sub&gt;1&lt;\/sub&gt;) was then calculated. The delay time and embedding dimension were estimated at 13, 40, 34, 27 and 22 points for the vowels \/a\/, \/i\/, \/u\/, \/e\/ and \/o\/, respectively, and at 8 points for all vowels. &lt;i&gt;Results:&lt;\/i&gt; The mLE&lt;sub&gt;1&lt;\/sub&gt;s for all vowels did not differ between normal males and females. The mLE&lt;sub&gt;1&lt;\/sub&gt;s for \/a\/ were significantly higher both in males and females with CP than in normal individuals. The correlation coefficient between the mLE&lt;sub&gt;1&lt;\/sub&gt;s and nasalance scores for all vowels was not significant for both normal and CP subjects. &lt;i&gt;Conclusion:&lt;\/i&gt; The LE seemed to be related to pathological disorders of the vocal cords in CP patients, but was independent of resonance parameters.<\/jats:p>","DOI":"10.1159\/000316322","type":"journal-article","created":{"date-parts":[[2010,10,8]],"date-time":"2010-10-08T07:47:03Z","timestamp":1286524023000},"page":"129-133","source":"Crossref","is-referenced-by-count":2,"title":["Lyapunov Exponents for Japanese Vowels in Normal Adult and Cleft Palate Speakers"],"prefix":"10.1159","volume":"63","author":[{"given":"Katsuaki","family":"Mishima","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Asuka","family":"Sugii","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tomohiro","family":"Yamada","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tatsushi","family":"Matsumura","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Norifumi","family":"Moritani","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"127","published-online":{"date-parts":[[2010,10,8]]},"reference":[{"key":"ref1","doi-asserted-by":"publisher","DOI":"10.1159%2F000094999"},{"key":"ref2","doi-asserted-by":"publisher","DOI":"10.1016%2Fj.ijporl.2005.02.017"},{"key":"ref3","doi-asserted-by":"publisher","DOI":"10.1007%2Fs00056-008-0702-0"},{"key":"ref4","doi-asserted-by":"publisher","DOI":"10.1016%2Fj.jvoice.2006.08.003"},{"key":"ref5","doi-asserted-by":"publisher","DOI":"10.1103%2FPhysRevLett.55.1082"},{"key":"ref6","doi-asserted-by":"publisher","DOI":"10.1103%2FPhysRevLett.50.346"},{"key":"ref7","doi-asserted-by":"publisher","DOI":"10.1121%2F1.1699392"},{"key":"ref8","doi-asserted-by":"publisher","DOI":"10.1121%2F1.419711"},{"key":"ref9","doi-asserted-by":"publisher","DOI":"10.1016%2FS0892-1997%2899%2980040-X"},{"key":"ref10","doi-asserted-by":"publisher","DOI":"10.1016%2Fj.jvoice.2007.01.009"},{"key":"ref11","doi-asserted-by":"publisher","DOI":"10.1016%2Fj.jvoice.2003.12.006"},{"key":"ref12","doi-asserted-by":"publisher","DOI":"10.1288%2F00005537-198507000-00017"}],"container-title":["Folia Phoniatrica et Logopaedica"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.karger.com\/Article\/Pdf\/316322","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/www.karger.com\/Article\/Pdf\/316322","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,4,23]],"date-time":"2025-04-23T19:38:33Z","timestamp":1745437113000},"score":1,"resource":{"primary":{"URL":"https:\/\/karger.com\/article\/doi\/10.1159\/000316322"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2010,10,8]]},"references-count":12,"journal-issue":{"issue":"3","published-online":{"date-parts":[[2011,4,1]]},"published-print":{"date-parts":[[2011,4,18]]}},"URL":"https:\/\/doi.org\/10.1159\/000316322","archive":["Portico"],"relation":{},"ISSN":["1021-7762","1421-9972"],"issn-type":[{"type":"print","value":"1021-7762"},{"type":"electronic","value":"1421-9972"}],"subject":[],"published":{"date-parts":[[2010,10,8]]}}}