SOUND OUTPUT NOISE REMOVING APPARATUS OF VEHICLE SOUND RECOGNIZER

摘要

PURPOSE: A sound output noise removing apparatus of a vehicle sound recognizer is provided to increase an amplification of a sound output from a speaker by filtering an output of a DA converter of the vehicle sound recognizer and controlling an input/output DC level. CONSTITUTION: A low pass filter(11) filters an output of a DA converter of the vehicle sound recognizer to a predetermined intercepting frequency. A non-inverting amplifier(12) non-inverting-amplifies the sound output filtered by the low pass filter(11). A DC level set section(21) is wireless-connected to the non-inverting amplifier(12) and controls an input/output DC level of the sound output from the non-inverting amplifier(12). An amplifier(22) increases and reduces an amplification of the sound output from the DC level set section(21) and provides it to an A/V head unit(20) of an A/V system.