yeah .. in fact that is why the difference in shape of the woofer and the HF
speaker,.,.. i though it was doppler he was talking abt but what u say makes
more sense
Alok



> -----Original Message-----
> From: Kevin Blain [SMTP:kevinb@WOODANDDOUGLAS.CO.UK]
> Sent: Tuesday, April 11, 2000 9:26 PM
> To:   PICLIST@MITVMA.MIT.EDU
> Subject:      Re: Headphones changing pitch automagically [OT]
>
> High frequency sounds are more directional than low frequency ones.
> Therfore, when you hold the headphones STILL away from you, the low
> frequency sounds are the ones that you hear LOUDER than the HF ones. Point
> a
> cup at your ear from further away, and you should notice the HF pick up
> again.
> ----- Original Message -----
> From: Alok Dubey <adubey@WIPRO.CO.IN>
> To: <PICLIST@MITVMA.MIT.EDU>
> Sent: Monday, April 10, 2000 6:10 AM
> Subject: Re: Headphones changing pitch automagically [OT]
>
>
> > yeah in college we called it dopplers effect
> > alok
> >
> >
> > -----Original Message-----
> > From: David Thompson [mailto:ranma21@EISA.NET.AU]
> > Sent: 08 April, 2000 6:49 PM
> > To: PICLIST@MITVMA.MIT.EDU
> > Subject: Re: Headphones changing pitch automagically [OT]
> >
> >
> > Hi Richard,
> >
> > I have noticed this affect also. Being a curious sort, I often wondered
> why
> > this could be. Rest assured, you are not psycho. The only thing that I
> can
> > add that it seems more obvious with higher volumes, and seems
> independant
> on
> > speed (i.e taking them off quicker or slower). Hmmm, I have just
> realised
> > that I've only noticed it with my full-size headphones, not the tiny
> in-ear
> > ones... whatever...
> >
> > I will be interested in any theories that people might have.
> >
> > Dave
> >
> > ----- Original Message -----
> > From: M. Adam Davis <adavis@UBASICS.COM>
> > To: <PICLIST@MITVMA.MIT.EDU>
> > Sent: Saturday, April 08, 2000 12:43 AM
> > Subject: Re: Headphones changing pitch automagically [OT]
> >
> >
> > > Well, the act of moving the headphones away from you would cause a
> drop
> in
> > > pitch, but it would normallize once the headphones stopped moving away
> > from
> > > you.  The pitch would rise while you bring the headphones towards you,
> but
> > again
> > > the pitch would normalize when they stopped moving (relative to your
> > head).
> > > The faster you move them, the higher (or lower) the pitch goes.
> > >
> > > If the change does not follow this description, then you might be
> looking
> > at the
> > > inability for the headphones to send higher pitched notes very far, so
> > they
> > > become less-audible the further the headphones are away from you.
> This
> > would
> > > make the spectrum of the music sound lower, and you might percieve
> that
> > the
> > > pitches shifted instead of the top ones disappearing.
> > >
> > > Or your psycho.  Perhaps to gov't is beaming info into your head to
> make
> > you
> > > crazy.  You should try wearing an aluminum helmet (except in
> > thunderstorms!).
> > >
> > > -Adam
> > >
> > > I respect faith, but doubt is what gives you an education. -- Wilson
> > Mizner
> > >
> > > Rich Leggitt wrote:
> > > >
> > > > So I'm building this MP3 player, and I'm listening to the music
> through
> > > > headphones.
> > > >
> > > > Then I take the headphones off and hold them away so that I can
> still
> > > > faintly hear the music. And the strangest thing -- there's a very
> > dramatic
> > > > drop in apparent musical pitch. I put the headphones back on, and
> the
> > > > pitch goes back up. I take them off again and the pitch goes down
> again.
> > > >
> > > > Now, I don't think the frequency is actually changing (unless
> perhaps
> > the
> > > > bulb in the refrigerator is also staying on.)
> > > >
> > > > But I'm wondering what's going on? Is this a known phenomenon, i.e.
> > large
> > > > changes in apparent amplitude and/or apparent bandwidth translated
> by
> > some
> > > > psycho-acoustic process into changes in apparent frequency?
> > > >
> > > > Or perhaps I AM the psycho in 'psycho-acoustic'? :)
> > > >
> > > > -- Rich
> > >
> >