Sound waves ccp
description
Transcript of Sound waves ccp
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Sound Waves
October 20, 2014
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Objectives
1. Understand that a sound wave is a compressional wave
2. Label compression, rarefaction, wavelength,
3. Recognize how sound moves and the related terms, loudness, pitch, frequency, and acoustics
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Waves transfer energy not matter.
Waves can only exist as they have energy to carry.
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• Compressional Waves
matter in the wave moves back and forth
parallel to the direction of the wave
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Sound Waves
Compressional wave
travels as vibrations moving through the air
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Compressional Longitudinal wave
the area squeezed together - compression.
area spread out –rarefaction.
The wavelength - one compression next
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What is sound?
Sound - compressional wave which travels through the air through a series of compressions and rarefactions.
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Sound travels through different media.
We hear sound which usually travels through air.
travels through other media and at different speeds
travels faster in a solid than a liquid and a gas.
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The denser the medium, the faster sound will travel.
The higher the temperature, the faster the sound travels.
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How is frequency related to pitch?
The pitch of a sound wave is directly related to frequency.
A high-pitched sound has a high frequency (a screaming girl).
A low-pitched sound has a low frequency (a fog-horn).
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Using Sound
What is Acoustics?
Acoustics is the study of sound and ways to optimize the hearing of sound inside various structures.