Across
- 4. The sound produced as a result of an object traveling at or above Mach 1
- 6. Thin layer of tissue tightly stretched across the ear canal that vibrates when sound waves hit it; also called the eardrum
- 8. When relating to sound waves, how loud a sound is; corresponds to the amplitude of a sound wave
- 12. A wave with a direction of propagation that is parallel to its direction of oscillation
- 13. An application using ultrasonic sound waves in which sensors detect the reflection of emitted sound waves, creating an image
- 14. A wave with a direction of propagation that is perpendicular to its direction of oscillation
- 15. The commonly used unit for the loudness of a sound wave
- 17. Any speed that is faster than the speed of sound in the substance of interest
- 18. An indication of how high or low a sound is, which is primarily determined by the frequency of the sound wave
Down
- 1. Sound waves with frequencies lower than 20 Hz
- 2. Sound waves with frequencies higher than 20,000Hz
- 3. Tells how long you can listen to sounds of a given decibel before you risk damage to your ears
- 5. A type of wave; visible light is a type of electromagnetic wave
- 7. The unit for frequency, or 1/sec
- 9. A scale for measuring the intensity of a sound wave
- 10. The phenomenon that happens when you hear the pitch of a sound change if it is moving with enough speed relative to your position
- 11. Sound waves with frequencies between 20 and 20,000Hz; humans can hear sounds of these frequencies
- 16. The movement up and down or back and forth in a substance as a wave travels through it