Noise canx headphones - just the base unit, not the earpieces?

BreatheEasy

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Sep 17, 2007
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Most of the noise cancelling 'phones seem to use a little box of tricks dangling around your neck - is there any reason why makers couldn't just do this unit but allow you to plug your own choice of headphones into the unit, or am I been a bit naive here? Unless someone could suggest said product to me already in existence. I was thinking of some Sony MDRNC6 or 11 phones for regular long haul flights I go on if not....
 
[quote user="BreatheEasy"]is there any reason why makers couldn't just do this unit but allow you to plug your own choice of headphones into the unit, or am I been a bit naive here?[/quote]

Only that the noise-cancelling uses little microphones built into the earpieces to grab the noise being received at your ears and deliver the anti-noise (inverted phase) to cancel it. If the microphones were some way away from your ears, you wouldn't get the same cancellation effect.
 
Hmmmmmmmmm, thinks...

Couldn't you use the signal induced on the actual driver to the same effect? Possibly too hard to actually achieve I suppose as it's likely completely insignificant compared to the input signal, so maybe not in practice? Shouldn't be beyond the wit of man though...
 

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