Summary
Acoustic and aerodynamic properties of the voice source and vocal tract have been
extensively analyzed during the last half century. Corresponding investigations of
the subglottal system are rare but can be assumed to be relevant to voice production.
In the present exploratory study, subglottal pressure was recorded in a male adult
subject by means of tracheal puncture. Also recorded were the oral airflow and audio
signals. Effects of vowel, phonation type, and vocal register shifts on the subglottal
pressure waveform were examined. The moment of maximum flow declination rate was synchronous
with the main positive peak of the subglottal pressure waveform. The three lowest
subglottal resonance frequencies, determined by inverse filtering and long-term average
spectra of the subglottal pressure during speech, were found to be about 500, 1220,
and 2000 Hz, irrespective of supraglottal variations and phonation type. However, the subglottal
pressure waveform was affected by the supraglottal formants, whereas the radiated
vowel spectra did not show clear influence by the subglottal resonances. The fundamental
frequency immediately preceding and immediately following a register break in pitch
glides did not show systematic relationships with formants or with the lowest subglottal
resonance.
Key Words
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Article info
Publication history
Accepted:
March 19,
2013
Identification
Copyright
© 2013 The Voice Foundation. Published by Elsevier Inc. All rights reserved.
