How to convert the data obtained by the audio detection module to the dB value
Hi ,
We use the Level detector to detect the audio ,here is the design. We can get the data block from the model, but we don't know how the convert the data block to eh dB valune?
Audio Signal Processors
adau1452
Audio Products
software
SigmaDSP Audio Processors
ADI North America will be on winter shutdown starting December 25, 2023; perhaps another community member can assist you until our return on January 8, 2024.
Hello Mia,
I'm not sure that I understand your question correctly.
When you turn ON the meter, the level detector itself shows the dB level of the signal.
Here is the formula to convert an 8.24 data into a dB level.
dB = 20*log(data)
For example, a signal level of 0.5 in 8.24 format is -6dB in the dB scale.
dB = 20*log (0.5) = -6dB
Please look at the below post where Dave explains how to read the level detector and get the dB value by an MCU.
post: (1) Reading meters with a controller on the ADAU1452 - Q&A - SigmaDSP Processors & SigmaStudio Dev. Tool - EngineerZone (analog.com)
If you have further questions, please post your query in a detailed way.
Regards,
Harish
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