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Sound Vocabulary
Science 8 Chap 16 Vocabulary
Term | Definition |
---|---|
sound | a type of wave that is produced by a vibrating object and that travels through matter |
vibration | a rapid, back and forth motion |
vacuum | a space containing few or no particles of matter |
pitch | how high or low a sound is |
hertz | the unit used to measure frequency (one hertz = one complete cycle/s) |
ultrasound | sound waves with frequencies about 20,000 hertz |
resonance | the strengthening of a sound wave when it combines with an object's natural vibration |
Doppler effect | the change in perceived pitch that occurs when the source of the one who hears the sound is moving |
intensity | the amount of energy of a wave, per wavelength |
decibel | unit used to measure the intensity of a sound wave |
amplification | the strengthening of an electrical signal often used to increase the intensity of a sound wave |
acoustics | the scientific study of sound - the behavior of sound waves inside a space |
echolocation | the sending out of high-pitched sound waves and the interpretation of the returning echoes |
sonar | instruments that use echolocation to locate objects underwater |