[Elecraft] Noise-cancelling headphones mystery

[David Woolley]

Noise cancelling headphones rely on the distance between microphone and 
ear being a small fraction of the audio wavelength.  At high 
frequencies, that will be impossible to achieve, and, even if you put in 
a compensating delay, the path to the  ear is going to depend on the 
direction of the source.

-- 
David Woolley
Owner K2 06123.

On 09/12/2018 16:40, CUTTER DAVID wrote:
> ncies.  If your hearing takes you higher, the noise-cancelling has finished by then.  This is probably not the ability of the sensing mic but the circuitry and/or room acoustics, echo, etc.  I'm a little out of date on the subject but that's probably the essence of it