05205285 is referenced by 283 patents and cites 2 patents.

In conjunction with a medical device for stimulating the vagus nerve of a patient to modulate the electrical activity thereof as part of a prescribed therapy, apparatus is provided to selectively suppress the stimulation while the patient is speaking, to avoid undesirable modulation of the voice. The suppression apparatus includes a speech sensor and discriminator, to detect speech by the patient while avoiding false detection attributable to sounds other than speech. The suppression of nerve stimulation is ceased after a preset time interval regardless of continued detection of speech, to assure that beneficial therapy is not unduly inhibited in favor of mere cosmetic considerations or in the presence of prolonged false detections. In the preferred embodiment, the discriminator selectively varies the sensitivity of the suppression apparatus to speech by the patient to enhance its selectivity over sounds attributable to other sources, such as by changing the value of a threshold level which must be crossed before the suppression of nerve stimulation can occur or continue, and by filtering out disturbances.

Title
Voice suppression of vagal stimulation
Application Number
7/715428
Publication Number
5205285
Application Date
June 14, 1991
Publication Date
April 27, 1993
Inventor
Ross G Baker Jr
Houston
TX, US
Agent
Leitner Greene & Christensen
Assignee
Cyberonics
TX, US
IPC
A61N 1/08
View Original Source