US Patent 8942402 Acoustic speaker device

An acoustic speaker device (10) according to the present invention comprises at least two types of gas adsorption materials in a cabinet (12) thereof. A porous carbon material package member (14A), which is one of the gas adsorption materials, can adsorb or eliminate air in the cabinet (12) by a porous carbon material (41) during the operation of a speaker unit (13) so as to buffer compression or expansion of air in the cabinet (12). A sheet-like moisture adsorbing material (14B), which is the other of the gas adsorbing materials, is formed by dispersing copper ion-exchanged ZSM-5 zeolite (43) in a thermoplastic resin composition (44), and is stuck on at least a section of an inner wall of the cabinet (12). This configuration allows moisture in the cabinet (12) to be rapidly adsorbed.