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Activities/Turtle Art/Using Turtle Art Sensors (view source)
Revision as of 22:29, 8 October 2012
, 22:29, 8 October 2012→Wavelength and the speed of sound
http://www.youtube.com/embed/l3vKVTW1LQA
http://www.youtube.com/embed/l3vKVTW1LQA
One laptop running Turtleart is used to generate a 3kHz audio tone. The second laptop, XO-1.5 or higher, graphs the output of 2 microphones with Measure. If the 2 microphones are at equal distance from the source then the 2 traces are in phase. Move one microphone by half a wavelength and the 2 traces are opposite phase.
This experiment is best with a XO-1.5 or higher with stereo input. If you only have a mono XO-1 then you could parallel the 2 microphones to the mono input and see how the amplitude of the summed signal changes as you move one microphone
===Gliding tone===
===Gliding tone===