Sound Pressure Level Meter

Hello Everyone,

I am trying to create a sound pressure level meter using Matrix Voice, Is there any reference data that can help me to start?


Hi @rameelhashmi,

Are you trying to detect decibel level?

We have a standalone ESP32 MATRIX Voice example that changes the brightness of the LEDs with the energy level of the surrounding sound. You can modify the code in it to perform something similar on a Pi+Voice as well with MATRIX HAL.

If you would like to set up that standalone example with an ESP32 MATRIX Voice yourself, you can follow this guide here to get started and then copy paste the mic_energy.cpp code to main.cpp.

Let me know if you need any help!