CPC H04R 1/02 (2013.01) [G01H 3/10 (2013.01); G01H 9/00 (2013.01); H04R 29/001 (2013.01); H04R 31/00 (2013.01); H04R 2400/11 (2013.01)] | 11 Claims |
1. An apparatus comprising:
one or more loudspeakers housed in a rigid loudspeaker frame; and
a back cover, affixed to the rigid loudspeaker frame, comprising a base layer and a raised layer fitted against a back side of the rigid loudspeaker frame, wherein the base layer has a uniform layer thickness and the raised layer is a non-uniform grid of raised supports which extend beyond a height of the uniform layer thickness to create a plurality of enclosed portions having the uniform layer thickness.
|