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Published byWill Trott Modified over 10 years ago
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Review of Sound Waves Waves move and carry energy Waves travel in a medium Waves are created when a source of energy causes a medium to vibrate Waves spread out as they move Waves have different sizes and shapes Waves pass through each other Waves continue in the medium until they reach a barrier Waves do not disappear at barriers (waves diffract around corners) Waves move and carry energy Waves travel in a medium Waves are created when a source of energy causes a medium to vibrate Waves spread out as they move Waves have different sizes and shapes Waves pass through each other Waves continue in the medium until they reach a barrier Waves do not disappear at barriers (waves diffract around corners)
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Sound Sound is produced when objects vibrate It is a compression wave (or longitudinal wave) It needs something to travel through It travels through matter Sound is produced when objects vibrate It is a compression wave (or longitudinal wave) It needs something to travel through It travels through matter
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Sound Waves Molecules in the air vibrate about some average position creating the compressions and rarefactions.
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Longitudinal Wave wave particles vibrate back and forth along the path that the wave travels. Compressional Wave
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Waves transfer energy without transferring matter. Frequency= waves/time
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Frequency – How many wavelengths pass a point in a unit of time (the shorter the wavelength, the higher the frequency.) Image: scanned from Multimedia Concepts – James Schuman Sound Hz (Hertz) – 1 wavelength/sec. We hear it as pitch High frequency – high pitch Low frequency – low pitch
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