A white noise machine is one way that we can take some control over the soundscapes that we live in, but we don’t have much control over the white noise that’s available to us. So here is a cheap and easy way to make your own custom white noise machine.
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Connect a shirt pocket “amplified listener” hearing aid with an in-car FM transmitter, and you’ve got a wireless bug. Tuck them inside a hollowed-out book with the mic concealed by the dust cover, and you’ve got a covert listening device that you can leave lying around or on a shelf near a surveillance target. Then […]
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