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THE SPEED OF SOUND IN OTHER MATERIALS

After reading this section you will be able to do the following:

  • Explain whether or not the speed of sound is constant for all materials.
  • Describe what elasticity and density are and what relationship they have to the speed of sound.

You are in a long mining tunnel deep under the earth. You have a friend that is several thousands of feet away from you in the tunnel. You tell this person using a walkie talkie to yell and clang on the pipes on the tunnel floor at the same time. Press the play button below to find out what happens.

Speeds of Sound

Material
Speed of Sound
Rubber
60 m/s
Air at 40oC
355 m/s
Glass
4540 m/s
Lead
1210 m/s
Stone
5971 m/s
Copper
3100 m/s


Questions

  1. What happens when you change the material through which the sound travels?
  2. Through which material does sound move faster? Why do you think it is faster?