maximum phonation time
Also written as: MPT — Maximum Phonation Time
Longest duration a patient can sustain phonation on a single breath, measuring respiratory support for voice production.
Full Definition
Maximum phonation time (MPT) is a simple clinical measure assessing the duration an individual can sustain a steady vowel sound (typically /a/) at comfortable pitch and loudness on one breath. Normal adult values range from 15-25 seconds, with variations based on age, sex, and lung capacity. Reduced MPT may indicate respiratory weakness, vocal fold pathology, or inefficient glottal closure, while treatment progress can be monitored through MPT improvements over time.
Usage
Usage note: Always specify the vowel used (typically /a/) and report in seconds with reference to normative values.
In Context
- "Maximum phonation time was reduced at 8 seconds, suggesting poor respiratory support for voice." — Voice screening report
- "Following breathing exercises, MPT improved from 12 to 18 seconds over six therapy sessions." — Treatment progress note