Seeed Grove - Physical Sensor Modules - Seeed Studio 101020023, The Grove - Sound Sensor from Seeed Studio uses the combination of a simple electret microphone and a power amplifier to measure ambient sound levels.
The sensor outputs an analogue value which is compatible with any microcontroller with a spare ADC input and matching supply voltage.
Seeed 101020023 Grove - Sound Sensor Based on LM386 4V-12V Input