Summary
The phonation threshold pressure (PTP) is defined as the lowest subglottal pressure
needed for obtaining and sustaining vocal fold oscillation. It has been found to increase
during vocal fatigue. In the present study, PTP is measured together with the threshold
pressure needed for vocal fold collision; henceforth, the collision threshold pressure
(CTP). PTP and CTP are compared before and after loud, prolonged vocalization in singer
and nonsinger voices. Ten subjects repeated the vowel sequence /a, e, i, o, u/ at
a Sound Pressure Level of at least 80 dB at 0.3 m for 20 minutes. Audio and electroglottography signals were recorded before and after
this exercise. At the same time, oral pressure was registered while the subjects produced
a diminuendo repeating the syllable /pa:/, thus acquiring an approximate of the subglottal pressure.
CTP and PTP increased significantly after the vocal loading in the nonsinger subjects.
On the other hand, singers reported no substantial effect of the exercise, and most
singers had a mean after-to-before ratio close to 1 for both CTP and PTP.
Key Words
To read this article in full you will need to make a payment
Purchase one-time access:
Academic & Personal: 24 hour online accessCorporate R&D Professionals: 24 hour online accessOne-time access price info
- For academic or personal research use, select 'Academic and Personal'
- For corporate R&D use, select 'Corporate R&D Professionals'
Subscribe:
Subscribe to Journal of VoiceAlready a print subscriber? Claim online access
Already an online subscriber? Sign in
Register: Create an account
Institutional Access: Sign in to ScienceDirect
References
- Benign pathologic responses of the larynx.Ann Otol Rhinol Laryngol. 1995; 104: 13-18
- Classification Manual for Voice Disorders-I. Special Interest Division 3, Voice and Voice Disorders, ASHA.Lawrence Erlbaum Associates, Inc Publishers, Mahwah, NJ2006
Lehto L. Occupational voice—studying voice production and preventing voice problems with special emphasis on call-centre employees. Ph.D. Thesis. Helsinki University of Technology, Laboratory of Acoustics and Audio Signal Processing; 2007.
- Frequency and risk factors for voice problems in teachers of singing and control subjects.J Voice. 1995; 9: 348-362
- Voice disorders and occupations.Logoped Phoniatr Vocol. 1996; 21: 7-12
- Vocal problems among teachers: a review of prevalence, causes, prevention, and treatment.J Voice. 1998; 12: 489-499
- Changes in the prevalence of vocal symptoms among teachers during a twelve-year period.J Voice. 2005; 19: 95-102
- Speaker's comfort in teaching environments: voice problems in Swedish teaching staff.J Voice. 2011; 25: 430-440
- Voice problems and risk factors among aerobic instructors.J Voice. 1998; 12: 197-207
- Vocal problems among aerobic instructors and aerobic participants.J Commun Disord. 1993; 26: 179-191
- Vocal behavior and vocal loading factors for preschool teachers at work studied with binaural DAT recordings.J Voice. 2002; 16: 356-371
- Occupational safety and health aspects of voice and speech professions.Folia Phoniatr Logop. 2004; 56: 220-253
- Vocal loading-related changes in male teachers' voices investigated before and after a working day.Folia Phoniatr Logop. 2006; 58: 229-239
- Acoustic measures and self-reports of vocal fatigue by female teachers.J Voice. 2008; 22: 283-289
- Vocal symptoms among teachers with and without voice education.Logoped Phoniatr Vocol. 2005; 30: 171-174
- Voice symptoms of call-centre customer service advisers experienced during a work-day and effects of a short vocal training course.Logoped Phoniatr Vocol. 2005; 30: 14-27
- Phonation threshold pressure: a missing link in glottal aerodynamics.J Acoust Soc Am. 1992; 91: 2926-2935
- Effects of a vocally fatiguing task and systematic hydration on phonation threshold pressure.J Voice. 2000; 14: 341-362
- Do vocal warm-up exercises alleviate vocal fatigue?.J Speech Hear Res. 2003; 46: 422-436
- Perceived phonatory effort and phonation threshold pressure across a prolonged voice loading task: a study of vocal fatigue.J Voice. 2004; 18: 454-466
- Vocal fold collision threshold pressure: an alternative to phonation threshold pressure?.Logoped Phoniatr Vocol. 2009; 34: 210-217
- The effect of specific versus combined warm-up strategies on the voice.J Voice. 2009; 23: 572-576
Enflo L, Sundberg J, Romedahl C, McAllister A. Effects on vocal fold collision and phonation threshold pressure of resonance tube phonation with tube end in water. J Speech Lang Hear Res. In Press
Enflo L, Sundberg J, Pabst F. Collision threshold pressure before and after vocal loading. In Proceedings of Interspeech. Brighton. 2009; 780–783
Article info
Publication history
Published online: July 11, 2013
Accepted:
March 20,
2013
Identification
Copyright
© 2013 The Voice Foundation. Published by Elsevier Inc. All rights reserved.
