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"That their main business was not put into the mind knowledge which was not there before, but to turn the mind's eye towards light so that it might see for itself." ...Plato's advice to educators(429-347BC)
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Author Topic: request for applet2  (Read 6422 times)
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peacenlove
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on: November 19, 2009, 07:18:53 am » posted from:,,New Zealand

hi again an new question Sad
 Smiley

is it possible to calculate opposite phase or ? of any given frequency

and will that opposite phase fequency cancell the sound of its original

sorry i bet these sound (scuse the pun) like stupid questionss
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peacenlove
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Reply #1 on: November 19, 2009, 07:48:05 am » posted from:,,New Zealand

i found this
  The movie at left shows how a standing wave may be created from two travelling waves. If two sinusoidal waves having the same frequency (wavelength) and the same amplitude are travelling in opposite directions in the same medium then, using superposition, the net displacement of the medium is the sum of the two waves. As the movie shows, when the two waves are 180° out-of-phase with each other they cancel, and when they are in-phase with each other they add together. As the two waves pass through each other, the net result alternates between zero and some maximum amplitude. However, this pattern simply oscillates; it does not travel to the right or the left. I have placed two dots on the string, one at an antinode and one at a node.  http://paws.kettering.edu/~drussell/Demos/superposition/superposition.html

is it possible to make an applet showing this with a frequency and opposite phase calculator
sine wave within normal hearing range
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peacenlove
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Reply #2 on: November 19, 2009, 08:49:49 am » posted from:,,New Zealand

(100 Hz – 11000 Hz).
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Fu-Kwun Hwang
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Reply #3 on: November 19, 2009, 12:28:28 pm » posted from:Taipei,T'ai-pei,Taiwan

Please check out Superposition of two waves or Suposition of Two Waves (with different phases)
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peacenlove
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Reply #4 on: November 20, 2009, 03:53:12 am » posted from:,,New Zealand

thanks so much Smiley
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"That their main business was not put into the mind knowledge which was not there before, but to turn the mind's eye towards light so that it might see for itself." ...Plato's advice to educators(429-347BC)
 
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