Question: do bose noise cancelling headphones really work?
Answer: Many do little, if anything, and the worst actually add noise. ... Noise cancelling headphones, as we've discussed, don't work at all frequencies. They don't even work at the same amount across the frequencies they do work at. The Bose , for example, drop by 45 dB at 160 Hz (a low, bass sound), but “only” 20 dB at 500 Hz.