Author and medically reviewed by: Dr. med. Gerrit Wohlt, Specialist in Otorhinolaryngology (ENT) and Specialist in Phoniatrics and Phonosurgery.

Last reviewed: 24.09.2026

References:

1. Benninger, Jacobson, Johnson: Vocal Arts Medicine: The Care and Prevention of Professional Voice Disorders. Thieme Med. Publishers (1993)
2. Benninger, Murry: The Performer’s Voice. Plural Publishing (2006)
3. Bunch MA.: Dynamics of the Singing Voice. Springer Verlag (1982)
4. Punt NA.: The Singer’s and Actor’s Throat. 2nd ed. William Heinemann Medical Books Ltd (1967)