Posted 2012-03-19 1:22 PM (#452098 - in reply to #452095) Subject: Re: OT, but Very Cool: The Shape of Sound ...
Joined: August 2009 Posts: 1137
Location: Germany, where delicious wine is growing (Rheinh)
Willa, I hope your parrot isn't reproducing this sound, so you will get a problem to get the dog back ..... LOL!
But interesting: With higher frequency the "circles" get smaler, but more.
Posted 2012-03-19 2:34 PM (#452100 - in reply to #452095) Subject: Re: OT, but Very Cool: The Shape of Sound ...
Joined: January 2006 Posts: 5881
Location: Colorado Rocky Mountains
Old timers like me will remember the phoney light bars we installed in our cars in the 1960's. We sent a speaker signal through the device which supposedly controlled how the lights in the device illuminated. It was a gimmick, at best.
Posted 2012-03-19 4:55 PM (#452105 - in reply to #452100) Subject: Re: OT, but Very Cool: The Shape of Sound ...
Joined: December 2001 Posts: 7229
Location: The Great Pacific Northwest
boltonb - 2012-03-19 12:34 PM
Old timers like me will remember the phoney light bars we installed in our cars in the 1960's. We sent a speaker signal through the device which supposedly controlled how the lights in the device illuminated. It was a gimmick, at best.
You'd think at first glance that this would be "off topic" but in fact Ovation made a very cool light controlled device. Someone sold one on here recently...
I also remember building a "color organ" from a kit that was essentially a speaker box with a frosted glass/plastic front instead of a grill. On the inside were three rows of bulbs in red green and blue. The circuit divided the high's mids and lows to the three sets of lights. It worked best on tunes with a heavy beat. I may still have it somewhere. fun stuff.
Posted 2012-03-21 10:40 PM (#452174 - in reply to #452106) Subject: Re: OT, but Very Cool: The Shape of Sound ...
Joined: December 2001 Posts: 57
Location: Jersey near NYC
Yup, you are looking at the node characteristics of the base material, whatever it is. This is exactly what the laser vibrometer does at Ovation when we look at top movement at different frequencies, but the LV measures it with a laser and gives you a real-time picture of the entire top.
You can do the same thing with your own guitar. Make sure it's level and pour a bit of fine sand on the top and hit a string. The sand will migrate to the nulls where the top is vibrating less and away from the nodes where the top is flexing. Now repeat at every frequency from 42Hz to about 15K and you get an idea of how cool the vibrometer actually is.
Posted 2012-03-22 12:16 AM (#452176 - in reply to #452095) Subject: Re: OT, but Very Cool: The Shape of Sound ...
Joined: March 2005 Posts: 5567
Location: Blue Ridge Mountains
Miles I sold one of those to T n T several years ago..had the box and paperwork: Tim has had several of these. Just add incense, dry ice fog and there ya go...
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OT, but Very Cool: The Shape of Sound ...
