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The SparkFun Analog MEMS Microphone Breakout makes it easy to work with the InvenSense ICS-40180 analog microphone. This board features an OpAmp to bring the output of the microphone to a usable level, allowing you to plug directly into an ADC on a microcontroller or something like the SparkFun Spectrum Shield.
In addition to amplifying the signal, the OpAmp adds a bias voltage of 1/2 VCC. With sound sources such as a normal speaking voice a few feet away from the microphone, the AUD output signal will be at about 200mV peak-to-peak. Also note, this low profile microphone has its port on the bottom side, so the microphone can be mounted flush to the outer surface of your enclosure. This microphone is omni-directional, which means it does a good job of picking up sound sources from all directions.
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Any idea if it works above 20khz? Could this be used for listening to Bats? Thanks, Dom
Hi Dom, Sorry, but this mic's datasheet says it will only work from 60Hz to 20KHz. Also note, that the op amp design has an upper frequency -3dB roll off at 19.7KHz. Sounds like a cool project though. If you want to, you could try reaching out on our forums to see if anyone else might be able to recommend a mic with wider frequency response. https://forum.sparkfun.com/ Good luck! Pete
If I want to build a microphone array on a breadboard, should I let the side with the "hole" of the microphone up so the sound won't be blocked? Thanks!