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Analog Microphone or PDM Microphone

Question asked by Bimal on Jul 20, 2016
Latest reply on Jul 21, 2016 by DaveThib



We are working on one product, were we need to get microphone data with different sample rate like (8kHz, 16.5kHz, 44.1kHz).

I searched for the same and have some queries regarding the same as below:

As we need to have different sampling rate of Audio, we can't use the I2S Digital Microphone.

But there is an confusion on Analog & PDM Microphone.

I understand that Analog Microphone + Audio Codec can be implemented for configurable sample rate. But what about PDM Microphone + PDM receiver with Decimation filter to get the desired sample rate?

Does the PDM Mic+PDM Recceiver with Decimation filter will do the job of desired sample rate with good quality or i need to follow Analog Microphone + Audio Codec the approach for good performance?


Looking for valuable feedback