Frequency - The number of waves produced by a source each second measured in hertz (Hz), Crest/Peak - The highest point of a sound wave., Trough - The lowest point of a sound wave., Amplitude - The height of the top of a wave from its resting position., Wavelength - The size of a wave from one peak or trough to the next., Node - The middle point of a sound wave where the wave height is zero.,

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