Cochlea a protein motor called prestin on their outer membranes; it generates additional movement that couples back to the fluid–membrane wave. This "active amplifier" is essential in the ear's ability to amplify weak sounds. The active amplifier also leads to the phenomenon of soundwave vibrations being emitted from the cochlea back into the ear canal through the middle ear (otoacoustic emissions). Otoacoustic emissions are due to a wave exiting the cochlea via the oval window, and propagating back through the middle ear to the eardrum, and out the ear canal, where it can be picked up by a microphone. Otoacoustic emissions
Electric Music for the Mind and Body "I-Feel-Like-I'm-Fixin'-to-Die". Bruce Eder in a retrospective review for AllMusic felt that the album is "one of the most important and enduring documents of the psychedelic era". The album was included in Robert Dimery's 1001 Albums You Must Hear Before You Die. All songs by Country Joe McDonald, except where noted Electric Music for the Mind and Body Electric Music for the Mind and Body is Country Joe and the Fish's debut album. Released in May 1967 on the Vanguard label, it was one of the first psychedelic albums to come out of San Francisco. Tracks from the LP, especially "Section