10th Annual Conference of the International Speech Communication Association

Brighton, United Kingdom
September 6-10, 2009

Collision Threshold Pressure Before and After Vocal Loading

Laura Enflo (1), Johan Sundberg (1), Friedemann Pabst (2)

(1) KTH, Sweden
(2) Hospital Dresden Friedrichstadt, Germany

The phonation threshold pressure (PTP) has been found to increase during vocal fatigue. In the present study we compare PTP and collision threshold pressure (CTP) before and after vocal loading in singer and non-singer voices. Seven subjects repeated the vowel sequence /a,e,i,o,u/ at an SPL of at least 80 dB @ 0.3 m for 20 min. Before and after this loading the subjects’ voices were recorded while they produced a diminuendo repeating the syllable /pa/. Oral pressure during the /p/ occlusion was used as a measure of subglottal pressure. Both CTP and PTP increased significantly after the vocal loading.

Full Paper

Bibliographic reference.  Enflo, Laura / Sundberg, Johan / Pabst, Friedemann (2009): "Collision threshold pressure before and after vocal loading", In INTERSPEECH-2009, 780-783.