Patent ID: 9628928
Date: 2017-04-18
CPC Classifications: H04R

Claim:
1. A speaker control device comprising: a converter connected to a drive power source in series with a drive circuit for driving a plurality of coils of a speaker, the converter outputting digital data varied in accordance with a voltage supplied by the drive power source; a monitor circuit detecting a broken wire or short circuit of the plurality of coils of the speaker based on the digital data output by the converter; a noise shaper input with a digital signal expressing audio output from the speaker; and a miss-match shaper selecting each of the plurality of coils of the speaker based on an output signal of the noise shaper; wherein when either the broken wire or short circuit of the plurality of coils of the speaker is detected by the monitor circuit, a setting for not using the coil with a broken wire or short circuit is performed in the noise shaper and/or miss-match shaper.