Patent ID: 7164775

Claim:
A hearing aid assembly comprising a hearing aid wherein said hearing aid is comprised of an acoustic receiver, an acoustic transmitter, a body, a first annular channel, and a first annular ring, wherein a. said acoustic receiver is operatively configured to fit into an external acoustic meatus of an ear, b. said acoustic transmitter is operatively configured to fit into an inner ear canal of said ear, c. said body is disposed between said acoustic receiver and said acoustic transmitter, said body being generally elliptical, d. said first annular channel is disposed on a surface of said body such that said first annular channel circumscribes said body's circumference, e. said first annular ring is disposed within said first annular channel, f. said first annular channel has a first depth which is less than a depth of said first annular ring, such that said first annular ring protrudes from said first annular channel, g. the quotient of a depth of said first annular channel divided by a thickness of said first annular ring is less than about 0.85, h. said body further comprises first cavity and a second cavity, each of which extends through a surface of said body, and i. said first annular ring comprises a noncircular cross section with at least five sides.