You need infrasound microphone. You can for example find a suitable microphone by referring to the link:https://www.gras.dk/products/special-microphone/infra-sound-microphones.

Best wishes

Thank you Prof. Zekry.

Please this microphone is digital MEMS, and can used it in biomedical domaine ?

Dear Mariame,

this microphone is a condenser microphone and it is an analog microphone that needs a preamplifier that can be obtained from the same vendor. So you can yourself study its specifications and judge whether it could be used in the intended applications or not.

You can use data acquisition and control cards DAQ fro national instruments to convert the microphone signal into digital form and acquire it in a lap top or PC.

The MEMs microphone which i found in my google search are ultrasound no infrasound.

Best wishes

Thank you dear Pro. Zekry for these explanations

Dear Pro. Zekry,

In fact, I'm writing you this request in order to ask you for more clarifications. I hope I'm not disturbing you by all these request.

_ Firstly, to give you a general idea of my vision. I want to record a acoustic sound using ( from 1 Hz to 500 Hz) a MEMS array -based sensor in combintion with FPGA. Does this idea is avaible for analog microphole like condenser microphone , or I must use just DSP?

_ Secondly, if it is possible(using FPGA), what do i need to use for converter anolog signal to digital signal:

1-use ADC of each microphone

2 use simultaneous sampling ADCs for all microphones

?

Finaly, could you please give me a genaral idea about a block diagram possible?

Thank you so much Sir Zekry, and I 'm realy sorry for borthing you.

Best regards