What is the average maximum phonation time

Study design: Prospective. Methods: Sixty-nine healthy older adult volunteers participated ie, 15, 26, and 28 in the seventh, eighth, and ninth decades of life, respectively. The effects of age, gender, and repeated measures three trials in a single session on MPT were assessed. However, it is useful as an indicator of laryngeal pathology and is frequently used to monitor progress. Graham Williamson. Categories: Voice. Using a stopwatch, time in seconds how long the client can sustain the vowel.

The group mean MPT for the male subjects was significantly longer than for the female subjects. Generally, phonation time increased with age for both sexes. Shimmer reflects cycle-to-cycle amplitude variations in the voice waveform.

Noise-to-harmonic ratio: From the same vowels, the amount of the signal coming from voicing versus noise can be measured. Normal noise-to-harmonic ratio is less than 0.

Normal measures of jitter, shimmer, and noise-to-harmonic ratio are influenced by algorithm, recording environment, recording technique, and recording hardware. Maximum phonation time: The maximum amount of time a person can sustain phonation of "ah" is timed. Typically, adult females sustain phonation of "ah" from 15 to 25 seconds; while males range from 25 to 35 seconds.

The ideal ratio of "1" is when the productions are sustained for the same amount of time. If there are difficulties in glottal valving, the "s" will be phonated longer and will be reflected by ratios greater than 1. Physiologic pitch range: Highest possible pitch: The patient is instructed to, "Start at a comfortable pitch and loudness, then raise your pitch gradually as high as it will go until it breaks off. Lowest possible pitch: The patient is instructed to, "Start at a comfortable pitch and loudness, then lower your pitch gradually as low as it will go, as if you were yawning or sighing.

Clinical measurement of speech and voice.