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CAUTION:

At a concert, it is possible for the intensity of the sounds coming to your ears to become so loud that the force of the sound on your ear drum can damage your hearing. This can happen in other ways too.

• If you use headsets to listen to music, be careful not to turn the volume up too loud and cause damage to your hearing. Loud noises and sounds can cause permanent damage to the sensitive sound sensors in your ear.
• Also, if sounds are too loud, people cannot hear other sounds that may be important, like emergency warnings or a police siren or fire truck.

 

Using the relationship between speed, frequency and wavelength, solve the following problems.

1. The speed of sound is 330 m/s. If the wavelength of the wave is 1m, what is the frequency?

2. If the wavelength increases to 10 m, what happens to the frequency?

3. What is the speed of a radio wave that has a frequency of 3,000,000 Hz and a wavelength of 100 m?

4. What is the wavelength of sound with a frequency of 2,000 Hz?

5. What will you hear if the amplitude of a sound increases?

6. What will you hear if the frequency of the sound is decreased?

7. What happens when more than one sound source is present?

8. Some new cars have a sound system that cancels out road noises. What property of sound are they using?

9. Some people like to drive around with the sound systems in their cars turned up to full volume. Why is this dangerous?

Submit your work to the 3.03 Sound Dropbox.