Sound crew, when listening to audio on set, do noise canceling headphones work? I started having a conversation with an audio guy and we were baffled whether the noise canceling only works on noise seeping through the headphones, or does it change the audio the microphone is picking up and remove it from the microphone audio as well? I used them before once and turned them on while listening to the audio. It seemed to remove the noise seeping through the headphone ear muff, but I could still hear white noise coming into the headphones through the microphone. So I was wondering how much it effects the audio from the mic? I assume it would have some effect on it.