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REFRACTION OF SOUND

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

• Define sound refraction and why it occurs.
• Describe what occurs when a sound wave reaches the critical angle.

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Questions

1. What happens to sound traveling in one material when it enters another material at an angle normal to surface between the two materials (90 degrees to the surface)?
2. What happens to sound traveling in one material when it enters another material at an angle other than normal to surface between the two materials?
3. What happens to the sound as the incident angle approaches being parallel to the surface?