Patent ID: 9615158
Date: 2017-04-04
CPC Classifications: H04R

Claim:
1. An earpiece, comprising: an acoustic driver; an acoustic nozzle extending from the acoustic driver toward an output aperture, the acoustic nozzle including an acoustic passage between an entrance aperture and the output aperture to conduct sound waves from the acoustic driver toward the output aperture, the acoustic passage having a proximal end adjacent the acoustic driver and a distal end toward the output aperture; a sealing structure to engage an entrance to a user's ear canal; first acoustic impedance at the proximal end of the acoustic nozzle; and second acoustic impedance at the distal end of the acoustic nozzle; wherein the first acoustic impedance is a first acoustic mesh formed of an acoustic material, and wherein the acoustic nozzle has a nozzle volume between the first acoustic impedance and the second acoustic impedance, the first acoustic impedance, second acoustic impedance, and nozzle volume being selected to control resonance in the user's ear canal when the sealing structure is engaged with the entrance to the user's ear canal.