Noise cancellation does not damage your ears. It simply works with the destructive interference phenomenon. The audio wave is countered by a wave generated by the earbud like Bose QuietComfort Earbuds. Sound does not vibrate your ears when it comes to noise cancellation. It is the thing of the past with high-quality noise cancellation like Bose. However, some people have reported nausea due to low-quality noise cancellation.