Speech Disorders and Impediments
Sound Waves

What is the source of vibration in the speech organ?

Answer

Wiki User
12/27/2017

The vocal folds in the larynx are what cause the vibrations needed for producing speech. If a person's larynx has been removed or their vocal folds are paralyzed, then an external source of vibration is needed to produce the starting sound. Then all they have to do then is to mouth the words just like they did when they could speak.