| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an on-vehicle audio device in which an abnormality can be determined in a short determination time. <P>SOLUTION: A voice level comparison unit 32 reads the voice level of an audio signal from a voice level detection unit 11 of a DSP 10, and detects that the voice level is sufficiently low or in the silent state. When an abnormality detection unit 24 of a power amplifier 20 detects an abnormality in a state where the voice level is sufficiently low or in the silent state, an abnormality determination unit 33 determines that a DC offset abnormality is generated and stops operation of the power amplifier 20. <P>COPYRIGHT: (C)2012,JPO&INPIT |
