Re: Fwd: Re: apparent increase in loudness

[Ross Alexander Hendler <rah232@xxxxxxx>]

Ah yes, but the trick is that it could be any number
combination of pure tones some of which could be infra/
ultrasonic.

Ross A. Hendler

----- Original Message -----
From: Brian Gygi <bgygi@EBIRE.ORG>
Date: Friday, January 30, 2004 12:50 pm
Subject: Re: Fwd: Re: apparent increase in loudness

> I sent a posting to auditory list last year about this:
>
> "In the New York Times magazine of March 23, 2003, there
was a
> piece on
> Woody Norris who works with highly directed sounds.
Apparently, the
> military has interest in these as weapons.  It seems that the
sound
> of a
> baby crying played backwards mixed with some pure tones
is actually
> debilitating.  The author of the piece tries and it out and
finds
> it to be
> the case."
>
> I have been doing some studies with time-reversed
environmental
> sounds, one
> of which is a baby crying, and none of my subjects has
come
> screaming out
> of the booth yet (in fact, it deson't that much different from
the
> soundplayed forward).   I have tried mixing the baby-
crying-
> backwards-sound with
> various pure tones (only on myself) and it sounded like a
baby
> crying mixed
> with a pure tone, not Bach, but hardly debilitating.
>
> Brian Gygi
>
> At 11:23 AM 1/30/2004 -0800, Ross Alexander Hendler
wrote:
>
> >Some studies have shown that the sound of a baby crying
can
> >actually be quite debilitating. I remember reading about
these
> >studies performed by the American Technology
Corporation
> >which incorporated the sound of a baby crying played
> >backwards and mixed with some pure tones.
> >
> >I tried to find out more about what tones were used but
got
> >the reply that "Unfortunately, the recording in question is
the
> >the property of U.S. government and it is not a good idea
for
> >ATC to disclose their full contents."
> >
> >Ross A. Hendler
>