- Sally Sanford
Unvoiced vocalization technique involving a slight adduction of the vocal folds but not enough to create pitch, while still using the articulation of normal speech. Activity in the abductor muscles (the posterior cricoarytenoid) is increased in order to prevent vocal fold vibration. There is a smaller supralaryngeal aperture than in speech, creating constriction in the larynx.
Stage whispering is a louder form of whispering that has been a part of theatrical technique at least since the mid-19th century. Quiet whispering uses about twice the airflow rate of normal speech and loud whispering uses about three times the airflow. The activity in the thryopharyngeous muscles is two times greater in stage whispering than in quiet whispering, with even greater constriction in the supralaryngeal aperture. For many actors and singers, stage whispering, which is intended to be heard by the audience, can also involve some soft phonation.
Other types of unvoiced vocalization without pitch include gasping, panting, and sighing. Gasping involves a strong, sudden intake of breath through the mouth with sufficient adduction of the vocal folds so that the inhalation is audible. In panting, both inhalation and exhalation are audible during rapid, shallow, short breaths. Sighing is an audible exhalation with a slow, gentle release of the breath....