[Arny Krueger]

"ScottW" wrote in message

On May 28, 5:05 am, "Arny Krueger"
wrote:
"GoodFella" wrote in message

lkaboutaudio.com

Hi there, what is the working principle behind noise
canceling headphones?

A microphone picks up ambient noise near the headphones,
inverts it and mixes it with the normal input signal.

Since the noise is inverted, it cancels with noise that
leaks into the headphone through the air.

Do they all use the same mechanisms?

Same basic idea, differences in how they refine the idea.

Which ones would you recommend as best in
terms of actually canceling them outside noises, as
opposed to audio quality?

None of them. I favor using in-ear monitors (IEM), that
block out outside noises.

No ear plug blocks the low freq rumble of aircraft
engines.

Wrong.

Noise cancellation does a better job. Airplanes
are the only place I'd consider them.

I've had great success listening to music in airplanes with IEMs.