Estimating phonation threshold pressure: research note.
Phonation threshold pressure (PTP) is the minimum subglottal pressure required to initiate vocal fold oscillation. Although potentially useful clinically, PTP is difficult to estimate noninvasively because of limitations to vocal motor control near the threshold of soft phonation. Previous investiga...
| Publicado en: | Journal of Speech, Language & Hearing Research Vol. 40; no. 5; pp. 1122 - 1130 |
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| Autores principales: | , |
| Formato: | research tables/charts Journal Article |
| Publicado: |
American Speech-Language-Hearing Association
Oct1997
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=107295822&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 107295822 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 10924388 1SM jtl: Journal of Speech, Language & Hearing Research issn: 10924388 maglogo: N pubinfo: dt: Oct1997 vid: 40 iid: 5 pid: 42 pub: American Speech-Language-Hearing Association place: Rockville, Maryland artinfo: ui: 107295822 107295822 1998069526 10.1044/jslhr.4005.1122 NLM9328883 107295822 ppf: 1122 ppct: 8 formats: fmt: @attributes: type: T tig: atl: Estimating phonation threshold pressure: research note. aug: au: Fisher KV Swank PR affil: Department of Communication Sciences and Disorders, Speech and Language Pathology, Northwestern University, 2299 North Campus Drive, Evanston, IL 60208-3570 sug: subj: Phonation Physiology Adult Female Larynx Physiology Ventilation Speech Production Measurement Pharynx Abnormalities Biophysical Instruments Data Analysis Software Pressure Repeated Measures Analysis of Variance Hypothesis Dependent Variable One-Tailed Test P-Value Two-Way Analysis of Variance Statistical Significance Two-Tailed Test Descriptive Statistics Funding Source Human Adult: 19-44 years Female ab: Phonation threshold pressure (PTP) is the minimum subglottal pressure required to initiate vocal fold oscillation. Although potentially useful clinically, PTP is difficult to estimate noninvasively because of limitations to vocal motor control near the threshold of soft phonation. Previous investigators observed, for example, that trained subjects were unable to produce flat, consistent oral pressure peaks during /pae/ syllable strings when they attempted to phonate as softly as possible (Verdolini-Marston, Titze, & Druker, 1990). The present study aimed to determine if nasal airflow or vowel context affected phonation threshold pressure as estimated from oral pressure (Smitheran & Hixon, 1981) in 5 untrained female speakers with normal velopharyngeal and voice function. Nasal airflow during /p/ occlusion was observed for 3 of 5 participants when they attempted to phonate near threshold pressure. When the nose was occluded, nasal airflow was reduced or eliminated during /p/; however, individuals then evidenced compensatory changes in glottal adduction and/or respiratory effort that may be expected to alter PTP estimates. Results demonstrate the importance of monitoring nasal flow (or the flow zero point in undivided masks) when obtaining PTP measurements noninvasively. Results also highlight the need to pursue improved methods for noninvasive estimation of PTP. pubtype: Academic Journal doctype: research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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