Katzenstein specialized in research of voice disorders and is known for physiological investigations of the larynx.

A voice disorder may be due to:

Hoarseness or breathiness that lasts for more than two weeks may signal a voice disorder and should be followed up with an otolaryngologist.

The evening will benefit the Voice Foundation, which has sponsored research and educational projects on the prevention and treatment of voice disorders since 1969.

Depth-kymography has great potential in the investigation of voice disorders and in phonosurgical applications.

People with voice disorders, singers, and other voice professionals are often advised against using caffeine.

The otolaryngologist examines the vocal folds to look for other possible causes for the voice disorder.

Treatment for voice disorders varies depending on the cause.

One voice disorder, spastic dysphonia, has no known cause.

Thus, voice disorders often involve lesions of the anterior glottis.