VOCAL ABUSE occurs whenever the vocal folds are forced to adduct too vigorously causing hyperfunction of the laryngeal mechanism. this hyperfunction, when repeated or habitual, may contribute to laryngeal tissue change, strain, and maladaptive behavior of the laryngeal musculature. In the form of sudden and violent adduction of the vocal folds or a more persistent use of a vocally abusive behavior, is one of the main elements in the development of many voice disorders. Forceful behaviors associated with hyperfunction include excessive shouting and loud talking, such as children shouting on a playground or a factory worker talking loudly over machine noise. Vocal abuse also occurs during screaming and in the production of vocal noises. vocal noises refer to those nonspeech laryngeal sounds that children make while playing. The standard sounds may include the roar of a car, truck, motorcycle and spaceship engines; the piercing scream of sirens; and various growls, barks, and howls of animals.
