{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,18]],"date-time":"2026-08-18T01:24:42Z","timestamp":1787016282515,"version":"build-2736575974"},"reference-count":18,"publisher":"Acoustical Society of America (ASA)","issue":"2","license":[{"start":{"date-parts":[[2023,8,9]],"date-time":"2023-08-09T00:00:00Z","timestamp":1691539200000},"content-version":"vor","delay-in-days":8,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2023,8,9]],"date-time":"2023-08-09T00:00:00Z","timestamp":1691539200000},"content-version":"tdm","delay-in-days":8,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100012818","name":"Comunidad de Madrid","doi-asserted-by":"publisher","award":["2018-T1\/HUM\/12172"],"award-info":[{"award-number":["2018-T1\/HUM\/12172"]}],"id":[{"id":"10.13039\/100012818","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2023,8,1]]},"abstract":"<jats:p>Source-filter interaction can disturb vocal fold vibration frequency. Resonance frequency\/bandwidth ratios (Q-values) may affect such interaction. Occurrences of fundamental frequency (fo) disturbances were measured in ascending pitch glides produced by four female and five male singers phonating into a 70\u2009cm long tube. Pitch glides were produced with varied resonance Q-values of the vocal tract\u2009+\u2009tube compound (VT\u2009+\u2009tube): (i) tube end open, (ii) tube end open with nasalization, and (iii) with a piece of cotton wool in the tube end (conditions Op, Ns, and Ct, respectively). Disturbances of fo were identified by calculating the derivative of the low-pass filtered fo curve. Resonance frequencies of the compound VT+tube system were determined from ringings and glottal aspiration noise observed in narrowband spectrograms. Disturbances of fo tended to occur when a partial was close to a resonance of the compound VT+tube system. The number of such disturbances was significantly lower when the resonance Q-values were reduced (conditions Ns and Ct), particularly for the males. In some participants, resonance Q-values seemed less influential, suggesting little effect of source-filter interaction. The study sheds light on factors affecting source-filter interaction and fo control and is, therefore, relevant to voice pedagogy and theory of voice production.<\/jats:p>","DOI":"10.1121\/10.0020569","type":"journal-article","created":{"date-parts":[[2023,8,9]],"date-time":"2023-08-09T13:06:21Z","timestamp":1691586381000},"page":"801-807","update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":4,"title":["Fundamental frequency disturbances in female and male singers' pitch glides through long tube with varied resistances"],"prefix":"10.1121","volume":"154","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7234-7551","authenticated-orcid":false,"given":"Johan","family":"Sundberg","sequence":"first","affiliation":[{"name":"Department of Speech Music and Hearing, KTH (Royal Institute of Technology) 1 , Stockholm, Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5560-7406","authenticated-orcid":false,"given":"Filipa","family":"L\u00e3","sequence":"additional","affiliation":[{"name":"Department of Didactics, School Organization and Special Didactics, Faculty of Education, The National Distance Education University (UNED) 2 , Madrid 28040, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5428-6222","authenticated-orcid":false,"given":"Svante","family":"Granqvist","sequence":"additional","affiliation":[{"name":"Division of Speech and Language Pathology, Department of Clinical Science, Intervention and Technology, Karolinska Institutet 3 , Stockholm, Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"231","published-online":{"date-parts":[[2023,8,9]]},"reference":[{"key":"2023103115134843100_c1","doi-asserted-by":"publisher","first-page":"4565","DOI":"10.1121\/10.0005432","article-title":"Are source-filter interactions detectable in classical singing during vowel glides?","volume":"149","year":"2021","journal-title":"J. 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