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Can peopl tell me what they make of the latest noise cancelling headphones please. From preferance I suspect I would like ones that completely cover my lugholes.
That said, despite cancelling the perceived sound, they are actually doubling the volume submitted to your ears. So in the long term, I'm not sure how good they are for your hearing. Whenever I've used them I've always felt a weird sort of pressure which I am guessing is the increased volumes.
The cheaper sets boost the sound as well as performing some cancellation.
The more expensive active sets actually allow you to listen at reduced volume. On a plane people tend to turn up the volume on the ordinary sets to drown out the ambient roar. With a decent active set it's not just quieter but you can listen with the music or movies turned down.
The sensation of 'pressure' isn't real. It's your brain being fooled when they are working into thinking you're inner ear is pressured because the sound muffling is similar.
No, the sensation is totally real and noise cancelling headphones cancel noise by blasting a negative soundwave at you thus making things 'appear' to be quieter. The reality is you are being exposed to twice as much noise.
It 'feels' real. But it's not.
And the cancellation of sound is done by simply trying to generate a *negative* version of the ambient sound entering the headphones from outside. So yes - it's adding noise but the effect is literally to cancel out the ambient. It's only adding in the sense that 2 + (-2) = 0 and not 4. (Well more likely 2 + (-1.5) = 0.5 as the cancellation isn't perfect).
I disagree.. 1 noise *plus* another equally loud noise on an opposite frequency still makes two noises.
The fact that you cant hear them doesnt mean they arent there (your ears are simply being tricked) yet you are still subjecting your ears to the now twice as loud noise hence the feeling of pressure.
Why does no one market noise cancelling crash helmets?
Actually, maybe I should have kept that to myself.
Why does no one market noise cancelling crash helmets?
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