Reply-To: "Kevin Aylward"
From: "Kevin Aylward"
Subject: Re: Bullshit wins v. science
X-Newsreader: Microsoft Outlook Express 6.00.2800.1106
Date: Tue, 5 Nov 2002 18:30:15 -0000
NNTP-Posting-Date: Tue, 05 Nov 2002 18:30:47 GMT
"Mark Zenier" wrote in message
> In article ,
> Kevin Aylward wrote:
> >This is a misconception. The ear is *absolutly* *insensitive* to
> >A static phase shift is quite undetectable. It is a Fourier analyser.
> Er, are you deaf in one ear? Both ears combine to be sensitive to
> phase in some of the frequency range.
> Take a mono signal and feed it into headphones and you'll get a
> sound source that's small point in the center of your head. Swap the
> wires on one ear's speaker, and the perception changes to a diffuse
> sources outside your head, on either side.
Ahmmm. Again, This is a misunderstanding. As I *keep* pointing out, yes
is possible to detect phase difference by *comparison* of one signal
with another. I have made this quite clear that adding/subtracting *two*
signals will result in frequency response effects. It is the frequency
spectrum effect you detect, not the phase.
However, this is not relevant at all to the statement that the ear is
quite insensitive to static phase shifts. That is, take a signal. Pass
it through a phase shifter, either constant or phase varying with
frequency. Listen to the output *on its own*. You will simply not be
able to hear any difference.
SuperSpice, a very affordable Mixed-Mode
Windows Simulator with Schematic Capture,
Waveform Display, FFT's and Filter Design.