Rating is available when the video has been rented.
This feature is not available right now. Please try again later.
Uploaded on Jan 23, 2011
A simulation of what speech sounds like when recorded first through a hearing aid, and then through a personal FM system linked to the hearng aid. The demonstration takes place in an empty classroom while the presenter walks toward and away from the "listener" and while competing voices are played in background. To view the Captioned Version, search youtube.