US 12,413,908 B2
Sound field control device and filter determination system
Xun Wang, Wako (JP); and Toshio Inoue, Wako (JP)
Assigned to HONDA MOTOR CO., LTD., Tokyo (JP)
Filed by HONDA MOTOR CO., LTD., Tokyo (JP)
Filed on Mar. 28, 2023, as Appl. No. 18/191,061.
Claims priority of application No. 2022-060443 (JP), filed on Mar. 31, 2022.
Prior Publication US 2023/0319480 A1, Oct. 5, 2023
Int. Cl. H04R 3/12 (2006.01); H04R 3/04 (2006.01); H04R 5/04 (2006.01)
CPC H04R 5/04 (2013.01) [H04R 3/04 (2013.01); H04R 3/12 (2013.01); H04R 2420/01 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A sound field control device for producing a listening area and a quiet area in a sound field using a plurality of speakers, the sound field control device configured with a processor configured to function as:
a non-control-target component extractor configured to extract a non-control-target component from a sound source signal;
a speaker selector configured to select at least one of the plurality of speakers as a speaker to output the non-control-target component, based on a location of the listening area;
at least one control-target component extractor each configured to extract a control-target component from the sound source signal;
at least one sound controller provided respectively to the at least one control-target component extractor and configured to, for each of the plurality of speakers, adjust an amplitude and a phase of the control-target component extracted by the corresponding control-target component extractor, based on locations of the listening area and the quiet area using a filter having coefficients set for the speaker; and
a plurality of sound combiners provided respectively for the plurality of speakers, the sound combiners each configured to combine the control-target component which has been extracted by the at least one control-target component extractor and whose amplitude and phase have been adjusted and the non-control-target component to generate a combined result and to output the combined result to the corresponding speaker,
wherein the at least one control-target component extractor is a plurality of control-target component extractors each configured to extract a control-target component having a frequency from the sound source signal,
wherein the at least one sound controller is a plurality of sound controllers provided respectively to the plurality of control-target component extractors,
wherein each of the filters of each of the plurality of sound controllers is a single-frequency adaptive notch (SAN) filter set for the frequency of the control-target component extracted by the corresponding control-target component extractor,
wherein each of the plurality of sound controllers is further configured to, for each of the plurality of speakers and for the frequency of the control-target component extracted by the corresponding control-target component extractor, adjust the amplitude and the phase of the control-target component using the corresponding SAN filter, and
wherein each of the plurality of sound combiners is further configured to combine the control-target components whose amplitudes and phases have been adjusted for the respective speaker and for each of the frequencies of the control-target components and the non-control-target component to generate the combined result.