Hi,

I want to interface a microphone to a sensor board. I know the processor speed of the sensor board but can anybody tell me how would I calculate the sampling rate/frequency of the sensor board for analogue input to the sensor board?
Sensor board has 8 bit ADC.

Thanks a lot.

Regards,
Waqar

 

For most analog input boards, you don't "calculate" the sample rate. You set it (provided it is within the limits provided by the board). Those limits you look up in the specs for the board. As for what sample rate to set, that depends on what you intend to do with that audio. In general, you want to sample at least double the frequency of the highest frequency component in the audio. If you want to sample at a lower rate, then you should put an anti-aliasing low-pass filter ahead of the analog input board.

Robert Scott
Real-Time Specialties
Embedded Systems Consulting