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18. Waves & Sound - Part 1 of 3
18. Waves & Sound / Sound Intensity / Problem 11

An online tune generator creates sine sound waves in the air with a displacement amplitude of 0.04 mm at f1 = 200 Hz and f2 = 20 kHz. What is the pressure amplitude (pmax) at each frequency?  Specify, under these conditions, if these sound frequencies are harmful to human hearing. The pressure variation that corresponds to the harm threshold is 30 Pa. 

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