LING 210 Lecture Notes - Lecture 6: Voice-Onset Time, Vocal Folds, Sonorant
One source of sound during speech is the obstruction created by the vocal folds when they are put close to each such they start vibrating. The vibration frequency usually varies (note updated values) between 50 and 250 hz for men and 120-480 hz for women. One factor affecting this frequency is physiology (women typically have a higher vocal fold vibration frequency compared to men). You can feel vocal fold vibration if you touch your larynx, and articulate a [zzzzz]. [p ] in english is certainly voiceless (that is, no vocal fold vibration during the closure), but it is also aspirated. Aspiration is a noise that is due to airflow after the release of the oral closure. This noise is voiceless because of an opening gesture of the glottis (the same one involved when articulated voiceless fricatives, such as [h] or [s]) It will result in the devoicing of the following consonant.