CNA Vocabulary Sheet

Questions
1. In air it's about 330 m/s.
2. A unit of frequency measured in waves per second.
3. A spiral-shaped, fluid-filled inner ear structure; it is lined with tiny hairs that move when vibrated and send a signal along the nerve.
4. Something that can be heard.
5. The range over which you can hear things.
6. The surrounding environment or material through which a wave travels.
7. Tiny bits that nake up matter.
8. Empty space that doesn't contain matter.
9. Where sounds comes from.
10. The ear drum, plus the hammer, anvil, and stirrup bones. These carry the vibrations from the ear drum to the cochlea.
11. Determining the location of something by measuring the time it takes for an echo to return from it.
12. Move from side to side in a regular way.
13.The number of waves passing in one second.
14.In hearing, it is the lowest sound that someone can hear.
15. A buzzing or ringing sound in the ear which isn't caused by actual sounds.
16. Electronic equipment that gives visual images of sound waves, etc.
17. Closely crowded together; describes something that's heavy for its size.
18. The process of pressing thngs together.
19. Another word for volume when describing sound.
20. A thin piece of tissue pulled tight like the cover of a drum. When sound waves hit it, it vibrates.
21. Vibrations whose frequency is too low for us to hear.
22. The amount of energy send out, as in thebrightness of light or the volume of sound.
23. How high or low a sound is.
24. Having frequencies above those of audible sound.
25. Curved outside part of the ear that collects sound waves; also called ear flap. 26. A compression wave which our ears sense.
27. Units used to measure the loudness or intensity of sound.
28. The height of a wave.

Answers
1. speed of sound
2. hertz
3. cochlea
4. audible
5. audible range
6. medium
7. particles
8. vacuum
9. sound source
10. middle ear
11. echolocation
12. vibrate
13.frequency
14. threshold
15. tinnitus
16. oscilloscope
17. dense
18. compression
19. loudness
20. ear drum
21. subsonic
22. intensity
23. pitch
24. ultrasonic
25. pinna
26. sound wave
27. decibels
28. amplitude