Patent ID: 9020176
Filing Date: 2015-04-28
Classification: H04R

Abstract:
1. An apparatus for an ear having an ear canal, the ear canal having a residual ear canal volume after the apparatus is placed in the canal, the apparatus comprising: an earmold having a shell with sidewalls adapted to at least partially fit within the ear canal, the earmold including an internal air volume; a first vent with an elongated acoustical passage connecting the internal air volume of the earmold to the residual ear canal air volume; a second vent with an elongated acoustical passage connecting the internal air volume of the earmold to air external to the ear; wherein the first vent has a first internal opening adjacent to the internal air volume and a first external opening adjacent to the residual ear canal air volume; wherein the second vent has a second internal opening adjacent to the internal air volume and a second external opening adjacent to the residual ear canal air volume; wherein the first and second internal openings are located at opposite ends of a line that intersects a longitudinal axis of the earmold running from the residual ear canal volume to the air external to the ear; and wherein the earmold contains a microphone, an amplifier, and a receiver.