sonar - A system of detecting reflected sound waves., echolocation - The use of reflection of sound waves to navigate and locate prey., sonogram - An image formed by an ultrasound machine., ultrasound - Sound waves with frequencies above 20,000 Hz., Doppler effect - The apparent change in frequency of a sound as the source moves in relation to the listener., decibel (dB) - A unit of measurement of loudness., resonance - The increase in the amplitude of vibration that occurs when external vibrations match the object's natural frequency, Hertz (Hz) - Unit of measurement for frequency., frequency - The number of complete waves that pass a given point in a certain amount of time., rarefaction - The part of a longitudinal wave where the particles of the medium are far apart., compression - The part of a longitudinal wave where the particles of the medium are close together., longitudinal wave - A wave that moves the medium parallel to the direction in which the wave travels., vibration - A repeated back-and-forth or up-and-down motion., mechanical wave - A wave that requires a medium through which to travel., medium - Material through which a wave travels., wave - A disturbance that transfers energy from place to place.,

Sound Waves Vocabulary

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