Klarinet Archive - Posting 000262.txt from 1999/11

From: "Mark Charette" <charette@-----.org>
Subj: Re: [kl] KEYS
Date: Mon, 8 Nov 1999 14:32:57 -0500

From: Dodgshun family <dodgshun@-----.nz>
It took an electrical engineer (my father) to come up with the
> answer to what this was; fluorescents cycle at 100Hz, and the G is at
102Hz,
> so what Andrew was seeing was the sound beating against the light. It was
> pretty weird, but also very interesting. Has anybody ever come across
this
> kind of thing before?

All the time. Except here in the US the fluorescent light flickers at 120
Hz. Also, I have 2 computer screen on at home, each using a different
vertical frequency. When I practice I can watch the screens "flicker" on
different notes.

Mark Charette@-----.org
Webmaster, http://www.clarinet.org

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