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| Term | Definition |
|---|---|
| sound | vibrations that travel through the air or another medium |
| pitch | how high or low something can go |
| infrasonic | relating to or denoting sound waves with a frequency below the lower limit of human audibility |
| ultrasonic | human ear cant hear the sound |
| doppler | he change in the frequency or, equivalently, the period of a wave |
| acousticts | the properties or qualities of a room or building that determine how sound is transmitted in it |