| 摘要 |
PURPOSE:To obtain the acoustic equipment in which a noise sound being a cause to a damaged speaker or the like is not outputted from a speaker. CONSTITUTION:A detector 21 detects a signal level of a deck EQ output 4 and a level detection circuit 23 compares the level with a prescribed level. A voice mute section 9 provided to a pre-stage of a speaker section 13 makes attenuation processing depending on the comparison result to decrease the signal level of an amplifier output 12 received by the speaker section 13. |
