Aperiodicity, a characteristic of noise added to the vocal fold output, is responsible for distortion, raspiness, breathiness, jitter and shimmer....
Laryngeal Vibratory Mechanisms
The laryngeal vibratory mechanisms M0, M1, M2 and M3 refer to the patterns of true vocal fold vibrating behavior that often gave rise to some of the sensations prototypically designated by registers/voices, such as pulse phonation, strohbass, grave, chest voice, mixed voice, falsetto, head voice, flageolet, super head voice, and whistle. Some of these, like...
Nasality
Nasality is the subjective interpretation of nasalance and is achieved by allowing airflow through the nasal cavity. A voiced sound can be classified according to its nasality as hyponasal, homeonasal or hypernasal....
Supraglottic Distortion
Distortion is an aperiodic effect that introduces especially loud ‘noise’ to the voice. Supraglottic distortion is a classification of distortion originating from vibratory activity above the level of the vocal folds....
The Power-Source-Filter Model of Voice Production
Phonation — the act of using one’s voice — is a process that involves many interconnected parts. The complex system that is the voice can be divided into a sequence of three main components: a power source (the respiratory system), a sound source (typically the vocal folds), and an acoustic filter (the vocal tract)....
Vocal Tract Length
Manipulation of the vocal tract length (VTL), measured from the glottis to the lips, is the main way to alter the vocal tract volume (VTV), a measure of the space inside the vocal tract. By altering the vocal tract volume, one can make their voice sound lighter or darker....