How to amplify sounds from DMM-4026-B-R microphone?

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#1

Hi there,

We purchased DMM-4026-B-R microphone last week.
We connect that microphone with STM32F779NI-controller.
And connect STM32F779NI controller to WM8994 codec and play sounds through headphones.

We need to amplify the sounds from Microphone before entering codec.
Can you suggest any ideas on software side?

Thanks & Regards,
Sneha.K
Embedded Hardware Engineer Trainee.

#2

Greetings,

Once the PDM data has been converted to numeric format, amplification can be achieved by multiplying by the desired gain factor.

ST’s AN5027 may be helpful in relation to this topic.