A portable electronic device includes a housing that at least partially defines an internal volume. The portable electronic device further includes a cover secured to the housing and that is and capable of enclosing the internal volume. The cover having a cover opening capable of passing an audible sound provided by an audio module located within the internal volume. The audible sound passing from the audio module to the cover opening along an audible sound path. The portable electronic device further includes a bracket assembly positioned in the internal volume and having: (i) a bracket opening that is aligned with and between the audio module with the cover opening, and (ii) a fin element that spans the bracket opening, the fin element having at least a portion positioned within the audible sound path.