HomeОбразованиеRelated VideosMore From: Jeri Ellsworth

Sound to Light Magic Wand - Standing Waves

49 ratings | 9517 views
Jeri shows how to make a sound to light wand that can be used to visualize standing waves. The electret microphone and lamp are attached to a LM386 audio amplifier. This is recovered footage from 2008. Sorry the quality is low.
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Text Comments (7)
Jess Kriehn (4 years ago)
A SERIES OF LIGHTS IN LINEAR SUCCESSION - WITH SEPARATE MICROPHONES ON EACH MIGHT BE MORE 'GUI'
Jeri Ellsworth (8 years ago)
@630MillionGods. It was a sine wave. You would not capture standing waves with music.
Electricguy (8 years ago)
thats so cool jeri! :D i wanna try this out! :P
andyzweb (8 years ago)
more on standing waves please! this was super informative
kinglonewolf104 (8 years ago)
wow, really cool :) . &eB
John Wasser (8 years ago)
I found a more complete view of that Bell Labs experiment (Thanks, TinEye.com!): forum.phy.ntnu.edu.tw/demolab/phpBB/webdata/162_lrg_sound.jpg They use a neon bulb and the device takes ten minutes to do a scan.
Jeri Ellsworth (8 years ago)
@avsci Sorry I didn't mention that it was a simple audio amplifier LM386 chip.

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