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An inventor claims to invented Polasound, a material that works for sound waves the same way polaroid sunglass?
work for light. He says that putting a sheet of Polasound in front of your speaker system will eliminate all the "noise" just as polaroid eliminates glare. He wants me to invest all my savings to help him market the product. I turn him down. Why?
A.The effect will depend on frequency, so it will distort the music.
B. In order to reduce the noise, the Polasound layer will also absorb half the volume, making the music too soft.
C. Sound is a longitudinal wave, so it has no polarization.
D.The polarization of the sound will be random so the film will have no effect.
C
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