Sound Waves

Waves have several characteristics including troughs, which are the highest points of a wave.

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A sound wave with a high pitch will have a low frequency.

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The larger the amplitude of a sound wave, then the less energy the wave has.

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Frequency is the height of a wave from its trough to its midpoint.

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The distance between wave crests is called amplitude.

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• False

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The medium in which a sound wave is traveling has no effect on its speed.

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• False

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An oscilloscope is a machine that gives a picture of a sound wave. Low-pitched sounds have long wavelengths, and high-pitched sounds have short wavelengths. Which sound shown has the highest pitch?

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Which part of the diagram below shows the wavelength?

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• b

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• d

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As the amplitude of a sound wave increases, its

• pitch increases

• volume increases

• pitch decreaeses

• volume decreases

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Which measure determines the pitch of a sound?

• frequency

• distance

• amplitude

• crest height

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