Patent ID: 9621695
Date: 2017-04-11
CPC Classifications: H04M,H04R

Claim:
1. A portable electronic device, comprising: a housing for the portable electronic device, the housing including an audio output port; a first acoustic chamber internal to the housing and defined by a front sidewall, having a first exit opening proximate to the audio output port; a speaker unit provided in or coupled to the first acoustic chamber, for producing audible sounds; a second acoustic chamber internal to the housing and defined by a rear sidewall; an acoustic region joined to and extending between the first acoustic chamber and the second acoustic chamber, the acoustic region acoustically joining the first acoustic chamber and the second acoustic chamber and having a cross-sectional area that is smaller than the second acoustic chamber; and a porous material at least partially filling a portion of the first acoustic chamber, the second acoustic chamber, or the acoustic region.