measure audio level with ADC

[fvnktion]

measure audio line level

I have a requirement to be able to be able to measure the audio level of an audio line. I am wondering if anyone has done anything like this using an adc of of PIC?

I am thinking about setting up an integrator circuit with some time constant to capture how much audio signal was present over a period. The ADC value would roughly correspond to the volume?

Any thoughts on how well an ADC would interpret this as the level of volume?

 

[baysidebecca]

how to measure audio levels

You can use a log amp to greatly increase the dynamic range capability of the ADC input. The µC would then use a look-up table or linear regression coefficients to calculate and display the level in decibels.

https://en.wikipedia.org/wiki/Log_amplifier

 

[Petre Petrov]

adc measure audio

Hello!

Please specify:
frequency range,
min/max voltage,
impedance,
measurement of what: rms, peak, peak-to-peak?
etc.

May be that is good for you:

https://books.google.bg/books?id=th...icrocontroller+ADC&hl=en#v=onepage&q=&f=false

https://ww1.microchip.com/downloads/en/AppNotes/00854a.pdf

**broken link removed**

https://ww1.microchip.com/downloads/en/AppNotes/00693a.pdf

**broken link removed**

https://www.ieindia.org/pdf/88/88ET104.pdf


I hope that is helpfull
BR