Using a speaker as a microphone

If you are anxious to capture some low-frequency sounds with the help of a standard microphone, you may be out of luck. that is, unless you employ a speaker driver as your microphone. I've performed this hack in a different lifetime for some amateur studio purposes and it does work.

Speakers and microphones are very similar in structure if you can believe that, and the larger surface area of a speaker cone is ideal for those lower frequencies, like form a kick drum or jazz bass. But, don't spend a ton a cash on a professional unit -- try making your own and see if the results stand up to what your recording needs are.

This implementation used about $20 worth of materials and some junk parts that were functional to create a speaker microphone. If you're an audio parts nut, you may have all the required pieces already. Check this out for a complete list and directions, then get ready for some thump recording.

[via Hackaday]

Source