CPC H04R 1/1083 (2013.01) [H04R 1/1008 (2013.01); H04R 5/0335 (2013.01); H04R 2460/01 (2013.01)] | 13 Claims |
1. A playback device comprising:
an earpiece configured to be positioned adjacent a user's ear, the earpiece comprising:
a transducer having a diaphragm configured to face toward the user's ear when the earpiece is positioned adjacent the user's ear;
an outlet vent in fluid communication with the transducer;
a first microphone and a second microphone;
a support member having a first opening aligned with a first microphone, a second opening aligned with the outlet vent, and a third opening aligned with the second microphone; and
an acoustic mesh extending over the first opening, the second opening, and the third opening, wherein the mesh has a substantially uniform acoustic impedance of about 30-150 RaylsMKS,
wherein the first opening and the second opening have corresponding first and second areas, wherein the transducer has a downstream acoustic impedance based on the second area and the acoustic impedance of the mesh, and wherein the first microphone has an upstream acoustic impedance based on the first area and the acoustic impedance of the acoustic mesh.
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