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1. (WO2017020849) INTEGRATED LOUDSPEAKER DEVICE HAVING AN ACOUSTIC CHAMBER CONTAINING SOUND ADSORBER MATERIAL

Pub. No.:    WO/2017/020849    International Application No.:    PCT/CN2016/093228
Publication Date: Fri Feb 10 00:59:59 CET 2017 International Filing Date: Fri Aug 05 01:59:59 CEST 2016
IPC: H04R 9/06
Applicants: SOUND SOLUTIONS INTERNATIONAL CO., LTD.
Inventors: HEROLD, Josef
SCHMAUDER, Christoph
Title: INTEGRATED LOUDSPEAKER DEVICE HAVING AN ACOUSTIC CHAMBER CONTAINING SOUND ADSORBER MATERIAL
Abstract:
An acoustic device (10) having a housing and an acoustic transducer (12) is disclosed. The housing has a transducer space for the acoustic transducer (12), and a back volume space (17). The back volume (17) is filled with a sound absorber material (19). The sound absorber material (19) in the back volume space (17) is configured to virtually increase the size of the back volume space (17), and shift the resonant frequency of the back volume space (17). The acoustic chamber for the acoustic transducer (12) and the sound absorber material (19) is integral to the split-shell housing of the acoustic device (30). The sound absorber material (19) is retained in a portion of the acoustic chamber by an acoustically permeable material (18) that facilitates gas exchange within the back volume space (17), and between the sound absorber material (19) and the transducer space. The acoustically permeable material (18) is configured in different arrangements to facilitate the gas exchange.