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Activities/Turtle Art/Using Turtle Art Sensors (view source)
Revision as of 00:14, 22 February 2011
, 00:14, 22 February 2011→Beat frequency
===Beat frequency===
===Beat frequency===
A beat is an interference between two sounds of slightly different frequencies, perceived as periodic variations in volume whose rate is the difference between the two frequencies. http://en.wikipedia.org/wiki/Beat_%28acoustics%29
Three laptops are required. Two emit audio tones of 1000Hz and 1002Hz. The third graphs the sound level its microphone receives.
[[http://en.wikipedia.org/wiki/Beat_%28acoustics%29]]
===Gliding tone===
===Gliding tone===