Question on noise cancelling headphones
I've had a look on the forum but didn't see anything relating specifically to this question.
Noise cancellation generates an inverse sound to the background noise to effectively cancel it out. If i appear not to be hearing anything I am assuming i am still hearing sound and potentially at volume. Is there any risk to the health of your eardrums on that basis?
It occured to me during a demo of the Bose cans. As soon as i turned them on i got a sensation of my ears wanting to adjust pressure (a bit like a change in altitude). The demo was for a loud background noise of an aircraft cabin. I'm assuming (and i'll bow to the greater knowledge of the forum members here) that an loud counter signal (not equal due to the closed cups)would need to be generated. Would that equate to listening at high volume?