This circuit is from 1994, from a technical documentation from National Semiconductor, but can be adapted to work with more modern components.
This circuit appears elsewhere on this site. Although the 8038 is not an easily obtainable...
With the use of a microphone and an amplifier stage, this circuit does not require connection to...
This circuit has a sensitivity of 200 mV providing an RMS power of around 4 W for a load of 8 ohms...