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Unformatted text preview: 1 Problem Set 08 P ROBLEM S ET 8 G ENERAL S CIENCE 121 S UMMER 2011 7. Match the sound stimulus to a humans perception: Amplitude Timbre Frequency Pitch W a v e S h a p e L o u d n e s s 8. What percent change is necessary in loudness before humans can perceive it? What percentage of frequency difference is necessary before humans perceive it? 9. On a foggy night you hear a ship horn with a pitch of 450 Hz. The horn normally has a pitch of 440 Hz. Should you worry? Calculate the ships speed if the temperature is 20 C. Note: You must convert the frequencies to wavelengths using the sound speed you calculate. 10. Compute the speed of the ship in the previous example if it is instead 10 C. 11. A car has a horn that produces a pitch of 300 hz. On a 20 C day, the car is speeding away from you at 35 m/s. What pitch would you hear the horn? Summer 2011 2 Problem Set 08...
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This note was uploaded on 06/02/2011 for the course GSCI 121 taught by Professor Niculescu,m during the Spring '08 term at James Madison University.
- Spring '08