Tedd

>>Psychoacoustics is a very interesting area.
>
>Okay, what's that?

Psychoacoustics is the study of how the brain processes sound. For instance
sounds help us to locate things in a 3D space. The ear collects the sound.
The brain processes it to localize the object. The eyes swivel to locate
the object. It's a Lion - RUN.

>>Also bear in mind that the integration time of the brain is about 30
>>milleseconds. Sometimes known as the Hass effect.
>
>Again, what's that?

The Haas (sp) effect is an example of where the integration time of the
brain plays tricks on our psychoacoustical perception of what is going on.
The brain, generally, cannot differentiate anything that happens within a
30mSec time period. ie it is one big blur. Cartoon animation _works_
because of this. Also Television. After about 30mSec the brain can divide
these events into individual episodes. Let me give an example using sound.
If you walk into a hall and clap your hands once. (No one hand clapping
here!). You will generally hear a reverberation or an echo. The physics of
both are identical. The sound from your hands propagates through the air,
reflects off the walls, floors and ceiling, and returns to your ears. If
the space is small, these reflections arrive back at your ears within 30
mSec and are heard as a continuous but diminshing sound. If the space is
large then then reflections will arrive back at your ears after 30mSec and
you will hear the reflected sound as distinct reflections ... echo, echo,
echo. Psychoacoustics in its most simplest form.

Peter           mailto:peter@...

"Through our efforts, oneness perfects itself" - William Gibson - Idoru