Patent ID: 9148719
Filing Date: 2015-09-29
Classification: H04M,H04R

Abstract:
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; a channel joined to and elongated between the first acoustic chamber and the second acoustic chamber; and a porous material filled inside at least a portion of the first acoustic chamber, the second acoustic chamber, or the channel, wherein the first acoustic chamber is separate from the second acoustic chamber by the channel, and a cross sectional area of the channel is smaller than that of the second acoustic chamber.