SAR SH 522 Lecture Notes - Lecture 15: Phonation, Fundamental Frequency, Muscle Tone
15 Nov 2018
School
Department
Course
Professor
Document Summary
Frequency perturbation vocal jitter: measure of muscle tone and stability. A computer measures each cycle of vibration and compares them to each other in duration. If the variation in duration from 1 cycle to the next is greater than 1-2 percent, the voice will be perceived as hoarse. Physically t individuals will have lower perturbation values. Increased mass will result in higher perturbation. Your computer is going to measure every single cycle of vibration and it is going to compare them and see how they are different from one to the other. If they differ more than 1-2%, you might have an illness or disease process. You are less physically t, and have a hoarse voice. people who have a low frequency perturbation tend to be healthier. Increased mass can also cause to increased voice perturbation (so they might have a node, or a polyp). Maximum phonation time: the duration an individual is capable of sustaining a phonation (aaaaa).
