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soundwavesrock AJC

Science sound definitions

QuestionAnswer
decibel A unit used to measure the intensity of a sound or the power level of an electrical signal by comparing it with given level on a logarithmic scale.
compression The reduction in volume (causing an increase in pressure) of the fuel mixture in an internal combustion engine before ignition
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 the rate at which something occurs or is repeated over a particular period of time or in a given sample.
hertz the SI unit of frequency, equal to one cycle per second.
ultrasonic of or involving sound waves with a frequency above the upper limit of human hearing.
infrasonic relating to or 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 action of interfering or the process of being interfered with.
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 animals to eat or drink out of.
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: jdo1118
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