Re: Burroughs, Strobes (was Re: monitor refresh rates & epilepsy)


Subject: Re: Burroughs, Strobes (was Re: monitor refresh rates & epilepsy)
From: miriam clinton (iriXx) (iriXx@iriXx.org)
Date: Mon Jan 17 2005 - 18:12:11 EST


Richard Wentk wrote:

> At 00:58 18/01/2005, you wrote:
>
>> jan.larsson wrote:
>>
>>>
>>> If I remember this now the Burroughs/Gysin Dream Machine had a
>>> frequency between 8-12Hz (intended to correspond to the alpha waves
>>> of the brain).
>>>
>>> I think you can find DIY instructions on the net, but it is *not*
>>> receommended for anyone having epilepsy or similar problems.
>>
>>
>> It's been a whiole since I read about Burroughs but I doubt that it
>> was merely alpha -- I recall
>> 72hz as being the frequency of the strobe penlight (whatever it's
>> called) in eye triggering
>> hallucinations
>
>
> I find this hard to believe because persistence of vision effects make
> it unlikely that anything faster than 25Hz will be seen as separate
> flickers.
>
> Don't forget that movies, TVs and monitors flicker at these rates all
> the time and people aren't for the most part rolling around of the
> floor bleeding from their mouths because they've bitten off their own
> tongues after seeing them. Some of that is due to phosphor/LCD
> persistence, but even if you strobe with short pulses and hard edges
> the eye seems to smooth out anything much faster than this.
>
> None of the strobe designs I've seen go much above 20Hz. And lo -
> Google says this:
>
> http://www.davidwoodard.com/dream-index.html
>
> Richard

i must be unusual then... i see strobes at 60 - 75Hz...

then again, i hear whistles on tv sets when they're on stand-by.... and
i can hear high frequencies above average...

mC~

>
>
>
>

-- 
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