IC chip SPL meter

Helen Shaw

I am looking for an IC chip that would work as an SPL meter (converting dBV into dB SPL). It would be connected to a microphone. I have the other parts of the circuit, it's just the conversion that I am struggling with.

over 2 years ago

0 Tom Hendrick over 2 years ago

TI__Guru**** 180751 points

Hi Helen,

Welcome to our e2e forum! Texas Instruments does not have a stand alone chip that performs this function and I'm not aware of any single chip solution out there. Here is a link to a simple schematic that shows the front end of what I believe you are trying to do. The meter output (J1, J2) would then go to potentially one of our ADC's and then you would need to convert dB V into dB SPL through some math on a microcontroller.

0 Helen Shaw over 2 years ago in reply to Tom Hendrick

Prodigy 10 points

I'm afraid that it is the maths that I am struggling with. All suggestions on the internet that I have found so far don't seem to work well. Thank you anyway.

0 Tom Hendrick over 2 years ago in reply to Helen Shaw

TI__Guru**** 180751 points

Have you found this site: https://embedded-lab.com/blog/making-a-spl-db-meter/

0 Helen Shaw over 2 years ago in reply to Tom Hendrick

Prodigy 10 points

Thank you for that. I will look at it now.

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IC chip SPL meter