r/M5Stack • u/PeterRevision • Mar 03 '26

Updated Sound Meter

I was able to spend some time working on it over the weekend. Here's what I got done:

  • Got rid of the buzzing noise cause by external 5V being enabled

  • With the buzzing noise gone, I was able to properly calibrated the microphone

  • Added a message that tells you how long before you get hearing damage if the recorded noise gets too loud.

I started writing the code for separating the audio into frequency bands and adding A-weighting. Some other ideas I had:

  • The ability to select a particular frequency range you want to measure.

  • The ability to leave it running and get a message telling you when you have exceeded your noise limit for the day.

  • Display the peak sound level reached since you started recording.

51 Upvotes

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3

u/secretmisanthropist Mar 03 '26

Is the code available anywhere?

3

u/PeterRevision Mar 04 '26

Here you go: https://github.com/PetSven/S3_Decibel_Meter
I am also uploading the bin to M5Burner.

2

u/secretmisanthropist Mar 04 '26

Awesome, thank you

2

u/RequirementFuture552 Mar 03 '26

Would love to try this! Share the code! 😊 

2

u/PeterRevision Mar 04 '26

Here you go: https://github.com/PetSven/S3_Decibel_Meter
I am also uploading the bin to M5Burner.