Audio Noise Sensor using Mems

Audioguru again

Joined Oct 21, 2019
6,752
You and the specs of the sensor do not say if the sound is a momentary gun blast or a continuous car horn.
Also the frequency response?
Any microphone produces an analogue audio output. It needs a preamp and a circuit to convert its linear levels to logarithmic dBs.

The audio level monitor I built senses all audio frequencies and has a very fast "peak detector" circuit.
 

Thread Starter

DJ_AA

Joined Aug 6, 2021
308
I am using this to measure ambient audible noise, purely for comparison purposes between different times. It does not need to be a lab or regulatory standard. For example, placing it in an in-office corridor to detect peak time people are at the tea/coffee point, or roadside traffic, etc.
 

Thread Starter

DJ_AA

Joined Aug 6, 2021
308
Yes. You can also get MEMS microphones with the ADC built-in. All you need is an I2S interface.
Yes, some devices or other microcontrollers have an i2S interface, so I can simply look at the raw audio data to determine the noise level. I will check if there is an audio device which could do what I require natively.

I think i can place a ESP32 module, which could do this.
 
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