What range sound frequency can be measured from iPhone's microphone?

StackOverflow https://stackoverflow.com/questions/4063098

Question

I want to know the range of frequency that the iPhone's microphone can listen and can we play the least frequency sound recorded by iPhone's microphone?

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Solution

This web site has some iPhone 3G frequency response curves. Different device models have different mic frequency responses.

You can use any of AVRecorder, AudioQueue or AudioUnit RemoteIO APIs to record audio. See Apple's SpeakHere example app which includes source code for recording and saving to a file.

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