Frequency, Intensity, and Target Matching Effects on Photoglottographic Measures of Open Quotient and Speed Quotient

Author:

Hanson David G.1,Gerratt Bruce R.1,Berke Gerald S.1

Affiliation:

1. University of California at Los Angeles

Abstract

Measurements of Open Quotient (OQ) and Speed Quotient (SQ) were made from photoglottographic signals of normal male subjects during phonation. Samples were obtained at spontaneous levels of fundamental frequency and intensity, and at nine specified frequency/intensity combinations. OQ increased with fundamental frequency. OQ change was not significant for change in intensity and there was no significant interaction between frequency and intensity. Changes in SQ with variations of frequency and intensity were not significant. However, SQ did increase significantly when spontaneous phonation was compared to target matching phonation at similar frequency/intensity. Changes in both OQ and SQ across comfortable frequency and intensity ranges were relatively small in comparison to changes in OQ and SQ reported for pathological phonation.

Publisher

American Speech Language Hearing Association

Subject

Speech and Hearing,Linguistics and Language,Language and Linguistics

Reference24 articles.

1. Laryngeal vibrations: A comparison between high speed filming and glottographic techniques;Baer T.;Journal of the Acoustical Society of America,1983

2. The vibration of the vocal cords at selected frequencies;Brackett I.;Annals of Otology Rhinology and Laryngology,1948

3. High-speed motion pictures of the human vocal cords;Farnsworth D.;Bell Telephone Laboratories Record,1940

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