Sound Sensor
1 Sound Sensor chip — pinouts, specs, and datasheets.
KY-038
The KY-038 is a low-cost microphone sound-detection module. An onboard LM393 comparator produces a digital output (DO) that switches when the sound level crosses a threshold set by the onboard potentiometer, plus a raw analog output (AO) proportional to the microphone signal. Common in clap-switch and noise-detection projects.