noise canceling headphones
On Wed, 25 Jan 2012 12:34:18 +1100, "Trevor" wrote:
"josephkk" wrote in message
.. .
Where does the energy for all that processing and mixing come from?
Most commonly, batteries.
Trevor.
And could you explain to me how all the battery power gets to headphone
sets that do not contain batteries, nor obtain such power from the base
device? They shrilly claim to be noise canceling headphones as well.
?-)
|