Patent ID: 9479878
Filing Date: 2016-10-25
CPC Classification: H04R

Claim Text:
1. An earbud for insertion into an external ear canal, comprising: a cylindrically shaped body having proximal and distal ends and having a cavity located at its distal end for receiving and connecting to a hearing aid's receiver or audio tube; a flange made of resilient material extending radially and distally from the circumference of the proximal end of the body and terminating in a relatively more rigid retainer ring, wherein the circumference of the flange increases with longitudinal distance from the proximal end of the body up to a maximum value at an apex and then decreases to the circumference of the retainer ring; wherein the longitudinal distance from the apex of the flange to the retainer ring is shorter than the longitudinal distance from the apex of the flange to the proximal end of the body and further wherein the rate at which the circumference of the flange decreases with respect to longitudinal distance from the apex of the flange to the retainer ring is greater than the rate at which the circumference of the flange increases with respect to longitudinal distance from the proximal end of the body to the apex of the flange; and, an acoustic port located at the proximal end of the body for conducting sound produced by the hearing aid receiver into the external ear canal.