US 12,003,945 B2
Audio reproduction device
Shinsaku Saijo, Tokyo (JP)
Assigned to SONY GROUP CORPORATION, Tokyo (JP)
Appl. No. 17/415,981
Filed by SONY GROUP CORPORATION, Tokyo (JP)
PCT Filed Oct. 9, 2019, PCT No. PCT/JP2019/039838
§ 371(c)(1), (2) Date Jun. 18, 2021,
PCT Pub. No. WO2020/137082, PCT Pub. Date Jul. 2, 2020.
Claims priority of application No. 2018-247467 (JP), filed on Dec. 28, 2018.
Prior Publication US 2021/0385603 A1, Dec. 9, 2021
Int. Cl. H04S 7/00 (2006.01); H04R 3/00 (2006.01)
CPC H04S 7/302 (2013.01) [H04R 3/00 (2013.01); H04S 2400/01 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An audio reproduction device, comprising:
a signal processing circuit configured to generate multi-channel audio data;
an attenuation amount control unit that is connected to the signal processing circuit, wherein the attenuation amount control unit is configured to control an attenuation amount of audio data of each channel; and
a speaker device that is driven by a multi-channel audio signal from the attenuation amount control unit, wherein
the speaker device includes multi-channel speakers,
the multi-channel speakers includes a woofer,
the attenuation amount control unit is further configured to:
estimate, from an audio data value of each channel, a total value of currents that flows through the speaker device, and
control the attenuation amount of the audio data of each channel in such a way that the estimated total value of currents does not exceed a specific value, and
the attenuation amount of the audio data of each channel is controlled based on a ranking associated with each of the multi-channel speakers.