Vocal nodules Essay Example | Topics and Well Written Essays - 500 words

Vocal nodules - Essay Example heretofore in order to fully appreciate the mechanism involved in this process an understanding of lecturing mechanism with respect to the role of vocal heap nodules is required. This is discussed belowThe larynx or the voice calamity has a twin infolding of mucous membranes (vocal folds) stretched across the larynx. During speech or phonation, the air flow (originating from the lungs) is modulate by these membrane vibrations. Increased air flow/air pressure in the lungs causes the folds to open and at a time the pressure recedes after the air flows out the fold close again. These folds vibrate when closed due to national air pressure. (Cumming 2005) In effect, the loudness of speech or what is best termed as the pitch of the voice is placed by resonance frequency of the vocal folds and is measured in hertz. Fundamental frequency of vocal fold vibration correlates with changes in vocal fold tension and subglottal pressure and hence vocal fold mass, stiffness, and viscosityis the main predictor of the pitch of the voice (Hirano 1987).Vibrations of the vocal folds that are too forceful or prolonged closure in vascular congestion. If persistent they will in the end result in hyalinization of superficial lamina propria and eventually this is likely to lead to the formation of nodules.