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1. (WO2017034896) MANIPULATION OF PLAYBACK DEVICE RESPONSE USING AN ACOUSTIC FILTER

Pub. No.:    WO/2017/034896    International Application No.:    PCT/US2016/047420
Publication Date: Fri Mar 03 00:59:59 CET 2017 International Filing Date: Thu Aug 18 01:59:59 CEST 2016
IPC: H04R 1/34
Applicants: SONOS, INC.
Inventors: CHAMNESS, Mike
RAMOS, Aurelio
Title: MANIPULATION OF PLAYBACK DEVICE RESPONSE USING AN ACOUSTIC FILTER
Abstract:
An acoustic filter includes holes and is configured to receive sound waves generated by an audio driver of a playback device. The sound waves comprise sound waves of a first frequency that radiate according to a first radiation pattern and sound waves of a second frequency that radiate according to a second radiation pattern that is less directed along an axis of the audio driver than the first radiation pattern. The second frequency is lower than the first frequency. The acoustic filter is configured to attenuate the sound waves of the first frequency so that the attenuated sound waves of the first frequency are emitted from the acoustic filter according to an effective radiation pattern that is less directed along the axis of the audio driver than the first radiation pattern and pass the sound waves of the second frequency in substantial accordance with the second radiation pattern.