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20 Cards in this Set
- Front
- Back
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Sound Energy |
Energy that comes from vibrating particles |
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Wave |
Disturbance that carries energy through matter or through empty space |
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Vibration |
Small, rapid back-and-forth movement |
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Medium |
Any matter that waves travel through |
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Compression wave |
Waves in which the particles of the medium vibrate back and forth along the same direction as the wave blows |
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Compression |
Areas where the particles of a longitudinal wave bunch up |
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Rarefaction |
The areas where the particles of a longitudinal waves are sparse |
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Wavelength |
Distance from one compression to the next compression, or the distance from one direction to the next rarefaction |
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Wave speed |
How fast the wave travels |
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Frequency |
The number of waves in a certain period of time, for instance, 20 waves per second |
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Hertz |
Units we used to measure frequency - 20 waves per second would be 20 Hearts because one Hertz is equal to one wave per second |
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Pitch |
How high or low a sound is, and music, a baritone has a lower pitch than soprano |
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Amplitude |
In sound, this determines how loud the sound is |
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Decibel |
The units we use to measure how wide the sound is, it is abbreviated DB, a whisper is about 20 decibels, normal talking is about 60 decibels in a chainsaw is about 100 decibels |
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Reflection |
The bouncing back of a sound wave after it hits a surface |
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Sonar |
Machine that uses reflected sound to locate things |
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Ultrasonography |
You might know this as ultrasounds. These are machines use reflected sound waves to see inside a person's body. Often used to look at growing fetuses in to look at internal organs |
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Resonance |
When the vibrations of one object causes another object to also vibrate |
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Constructive interference |
When the compression of one wave overlap the compression of another way for waves |
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Deconstructive interference |
Compression of one wave overlaps the rarefaction of another wave. The resulting wave has a smaller amplitude that's the original waves had |
