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Look at dynamic microphones.

Check this out: (this is where I got the idea of recording through speakers)

In 8th grade, I took apart a dynamic microphone I had picked up from radio shack. It was essentially a tiny speaker! Naturally, I went ahead and connected it to the headphone jack of a portable cassette recorder and...

Heard some of the BEST sound I had ever heard out of small electronics! It was not loud, but it was detailed and full so long as one held the mic right against the ear.

I bought another one and mounted both of them inside some hearing protection type ear covers, essentially turning them into a sort of weird headphone.

Later on, a friend showed me a Walkman type radio / cassette player and the little open air type speakers it came with looked a whole lot like the dynamic mic "speakers" did and had a similar sound too.

I had come close to producing open air type listening gear on my own. My first attempt at stereo listening failed because I just did not have a great head mount. Went with the ear protection gear because that fit well and did make the most of the great, but somewhat quiet sound the little plastic cones in the cheapo dynamic mic could deliver.

Had I been able to come up with a suitable mount, it was extremely likely I would have ended up with two small speakers resting right on my ears Walkman style.

In any case, that is when I realized speakers can be microphones and that lead up to the point of discussion here now.



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