| 1. |
A unit of frequency measured in cycles per second.
hertz |
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| 2. |
The form in which sound energy moves from one place to another.
_________________ |
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| 3. |
A sound that is repeated because the sound wave reflected or bounced back from a distant object.
_________________ |
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| 4. |
A large bang caused by an aircraft flying at or faster than the speed of sound.
_________________ |
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| 5. |
The part of the human body used for hearing.
_________________ |
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| 6. |
The bending of waves as they pass through an opening or around the edge of an object.
_________________ |
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| 7. |
The loudness of a sound depends on the ____ of the sound wave.
_________________ |
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| 8. |
The low point of a sound wave where the lowest air pressure occurs.
_________________ |
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| 9. |
Two or more sound waves that overlap.
_________________ |
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| 10. |
A machine that sends out sounds waves and uses the waves that are reflected back. This is used to help detect underwater objects.
_________________ |
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| 11. |
A measure of the amount of energy that sound waves carry.
_________________ |
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| 12. |
The pitch of a sound depends on the ____ of the sound wave.
_________________ |
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| 13. |
A form of energy that travels as waves through the air and some solids and liquids.
_________________ |
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| 14. |
A structure in humans that contains the vocal cords and vibrates to produce sounds.
_________________ |
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| 15. |
The peak of a sound wave where the greatest air pressure occurs.
_________________ |
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| 16. |
The unit used to express loudness.
_________________ |
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| 17. |
The distance between one crest or peak of a sound wave and the next crest or peak.
_________________ |
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| 18. |
The area where particles or air are pushed closer together as a result of being near something that is vibrating.
_________________ |
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| 19. |
The process of using reflected sound waves to find objects. Bats, dolphins, and some other animals use this to find food and avoid danger.
_________________ |
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| 20. |
A measure of the highness or lowness of a sound.
_________________ |
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| 21. |
A machine that converts an electrical signal into a sound wave with an increase in loudness.
_________________ |
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| 22. |
The bouncing back or change in direction of a wave after it strikes a barrier or an object. This may also be called an echo.
_________________ |
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