noise canceling headphones
On 20/01/2012 3:20 PM, RichD wrote:
A noise canceling headphone consists of a headphone,
plus an external microphone fed to an inverting input,
right?
Why does that cost $40 extra?
--
Rich
Does it? I think you probably mean that its price is $40 more than the
price of otherwise similar non-noise cancelling headphones.
Why is its price that much higher? Because the vendors think that that
price is the one that maximises their profit.
Sylvia.
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