A simple test of glottic efficiency is Maximum Phonation Time (MPT). MPT is the maximum time (in seconds) for which a person can sustain a vowel sound when produced on one deep breath at a relatively comfortable pitch and loudness. Like the S/Z Ratio, this is a quick and simple aerodynamic measure. Because it is non-invasive and requires no. Introduction. Clinicians have many tools at their disposal to assess vocal function. Because of its simplicity and ease of use, maximum phonation time (MPT) is a frequently used clinical tool for assessing phonatory mechanics.Cited by: 74.
Request PDF on ResearchGate | Maximum Phonation Time in Healthy Older Adults | Maximum phonation time (MPT), a clinical measurement of the longest time . Objectives/Hypothesis. Maximum phonation time (MPT), a clinical measurement of the longest time one can phonate a vowel, typically /a/, is a frequently used measure of vocal function, but normative data are lacking for MPT in healthy older adults.Cited by: 74.
Calculating MPT www.sltinfo-.com Instructions 1. Ask the client to take a deep breath and then to sustain the vowel sound ‘ah’ (as in the words art and part) for as long as possible at a comfortable pitch and loudness on one exhalation, without straining. Using a stopwatch, time (in seconds) how long the client can sustain the vowel. Record. Phonation Time Phonation time can be achieved through the measurement of maximum phonation time and the s/z ratio. "Maximum phonation time refers to the maximum time a subject can sustain a tone on one breath" (Colton & Casper). Normal males can sustain for approximately 20 seconds, females 15 seconds, and children 10 seconds.