Destructive Interference

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Destructive Interference Active Noise Reduction
(ANR)
Koss Noise Reduction Headphones
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Destructive Interference Active Noise Reduction
(ANR)
Koss Noise Reduction Headphones
This revolutionary Active Noise Reduction (ANR)
stereo phone system reduces harmful and annoying
low frequency sounds in noisy environments.
Microphones in the headset "listen" to noise
coming to your ears. Then a microchip creates a
mirror image wave (of the same frequency and
amplitude as the original, but 180 degrees out of
phase), and sends it to the headphones. Result
Destructive interference cancels the noise.
Frequency Response 30-20,000 Hz. Plug it in like
normal headphones and hear only your music, not
the jet engine!