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Exploring Sound-SDY

Vocabulry

TermDefinition
Decibel Logarithmic unit used to express the ratio between two values of a physical quantity, often power or intensity.
Compression Reduction in the number of bits needed to represent data.
Rarefaction Diminution in the density of something, especially air or a gas.
Doppler Effect The change in frequency of a wave.
Vacuum A space entirely devoid of matter.
Frequency Rate at which a vibration occurs that constitutes a wave, either in a material.
Hertz Unit of frequency, equal to one cycle per second.
Ultrasonic Involving sound waves with a frequency above the upper limit of human hearing.
Infrasonic Denoting sound waves with a frequency below the lower limit of human audibility.
Echo A sound or series of sounds caused by the reflection of sound waves from a surface back to the listener.
Interference The combination of two or more electromagnetic wave forms to form a resultant wave in which the displacement is either reinforced or canceled.
Reverberation Prolongation of a sound; resonance.
Pitch The quality of a sound governed by the rate of vibrations producing it; the degree of highness or lowness of a tone.
Rhythm A strong, regular, repeated pattern of movement or sound.
Oscilloscope A device for viewing oscillations, as of electrical voltage or current, by a display on the screen of a cathode ray tube.
Wavelength The distance between successive crests of a wave, especially points in a sound wave or electromagnetic wave.
Crest A comb or tuft of feathers, fur, or skin on the head of a bird or other animal.
Trough A long, narrow, open container for growing plants or mixing chemicals.
Kilohertz A measure of frequency equivalent to 1,000 cycles per second.
Megahertz One million hertz, especially as a measure of the frequency of radio transmissions or the clock speed of a computer.
Echolocation The location of objects by reflected sound, in particular that used by animals such as dolphins and bats.
Created by: mcssdy0409
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