Not sure where to look.

But it is my understanding that the frequency of an impulse stimuli can
"lock" a person's alpha brain wave inducing trance-like states.  Guess at
around the 5Hz to 10Hz range.

In particularly susceptible people, certain pulsating frequencies can induce
epileptic seizures.

Recommend a search under "externally induced epileptic seizures"

                                  - Robert -

       Robert A. Macy, PE    [email protected]
       408 286 3985              fx 408 297 9121
       AJM International Electronics Consultants
       619 North First St,   San Jose, CA  95112


-----Original Message-----
From: Nick Williams <[email protected]>
To: [email protected] <[email protected]>
List-Post: [email protected]
Date: Wednesday, March 29, 2000 9:57 AM
Subject: Stroboscopic light sources


>
>Does anyone know of any good resources or actual requirements for the
>safe use of stroboscopic light sources? The application is a public
>science display. I recall rumors of stroboscopes operating at certain
>frequencies being capable of triggering fits, but whether this is
>just an old wive's tale or has some basis in reality I am unclear,
>not do I know of any other potential hazards (except the obvious
>dangers of syncronisation with moving machinery).
>
>All input gratefully received.
>
>Regards
>
>Nick.



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