{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,16]],"date-time":"2026-10-16T05:43:41Z","timestamp":1792129421667,"version":"4.4.0"},"reference-count":36,"publisher":"Acoustical Society of America (ASA)","issue":"6","content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2000,12,1]]},"abstract":"<jats:p>Direct observations of nonstationary asymmetric vocal-fold oscillations are reported. Complex time series of the left and the right vocal-fold vibrations are extracted from digital high-speed image sequences separately. The dynamics of the corresponding high-speed glottograms reveals transitions between low-dimensional attractors such as subharmonic and quasiperiodic oscillations. The spectral components of either oscillation are given by positive linear combinations of two fundamental frequencies. Their ratio is determined from the high-speed sequences and is used as a parameter of laryngeal asymmetry in model calculations. The parameters of a simplified asymmetric two-mass model of the larynx are preset by using experimental data. Its bifurcation structure is explored in order to fit simulations to the observed time series. Appropriate parameter settings allow the reproduction of time series and differentiated amplitude contours with quantitative agreement. In particular, several phase-locked episodes ranging from 4:5 to 2:3 rhythms are generated realistically with the model.<\/jats:p>","DOI":"10.1121\/1.1314398","type":"journal-article","created":{"date-parts":[[2002,7,26]],"date-time":"2002-07-26T14:21:16Z","timestamp":1027693276000},"page":"2996-3002","update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":102,"title":["Irregular vocal-fold vibration\u2014High-speed observation and modeling"],"prefix":"10.1121","volume":"108","author":[{"given":"Patrick","family":"Mergell","sequence":"first","affiliation":[{"name":"Siemens Audiologische Technik GmbH, Gebbertstrasse 125, D-91058\u2009Erlangen, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hanspeter","family":"Herzel","sequence":"additional","affiliation":[{"name":"Institute for Theoretical Biology, Humboldt University Berlin, Invalidenstrasse 43, D-10115\u2009Berlin, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ingo R.","family":"Titze","sequence":"additional","affiliation":[{"name":"National Center for Voice and Speech, University of Iowa, 330 Wendell Johnson Building, Iowa City, Iowa\u200952242"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"231","reference":[{"key":"2023071405064350300_ali","doi-asserted-by":"crossref","first-page":"1326","DOI":"10.1121\/1.401924","article-title":"Elastic models of vocal fold tissues","volume":"90","year":"1991","journal-title":"J. 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