[Harp-L] re: weird harp effect

["dzeller@xxxxxxxxxxx" <dzeller@xxxxxxxxxxx>]

Garry,

This is why one should ALWAYS cover one's head with aluminum foil while
playing harmonica at the computer screen, particularly with D harps!
Zig
(Gary said:
"so i'm sitting at the computer yesterday, waiting for somethng to finish. 
there was a D harp on the desk, so i picked it up and starting futzing
around. 
and at some point i see, just for a moment, these wavy horizontal lines on 
the screen. not sharp, distinct lines, but a series of evenly spaced (1/2"
or 
so apart) horizontal bands of fuzziness. hard to describe. 

after a little experimenting, i find i can reliably repeat it. it happens
every 
time i play the 3 draw bend (i forget which one), and lasts for exactly the 
duration of the note. i didn't try it with the same hole/bend on another
harp, 
or playing the same note on a different harp. nor did i try a different
monitor. 

but i'm curious whether this is a physical or perceptual event. that is,
are the 
sound waves at some particular frequency interacting with the
electromagnetic 
fields near the screen? or is that note making my skull/eyeballs vibrate in
such 
a way that i see an odd visual effect? or am i just nuts? not that this
option 
would necessarily rule out the other two... 

insight, anyone? "


---- 
Garry Hodgson, Senior Software Geek, AT&T CSO 

--------------------------------------------------------------------
mail2web - Check your email from the web at
http://link.mail2web.com/mail2web