I am curious about noise canceling done in machinery. I have heard that they
isolate the waveform, etc and send in interference to cancel noise and/or
vibrations. I have also heard of this being tried near airports (which I
find hard to believe). Does anyone have experience and/or information
relating to this?
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A number of headsets designed for use in noisy environments (such as the
cockpit of a light airplane) use this technology. For information on some
of these, take a look at