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Physics of Waves
What is sound?
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Physics of Sound
I. Basics of soundTerms and word wall
II. What is a wave?III. Ultrasound
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Sound word wall
• Wave• Crest• Trough• Amplitude• Frequency• Hertz• Pitch• Doppler effect• Noise
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What is a wave?
http://www.fearofphysics.com/Sound/dist.html
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What is a wave?
1. The wavelength of the wave in the diagram above is given by letter ______. 2. The amplitude of the wave in the diagram above is given by letter _____.
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What is a wave?
3. Indicate the interval that represents one full wavelength.
http://www.fearofphysics.com/Sound/dist.html
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Waves
• What is sound?– Pitch– Frequency– Noise
• What is noise?– How do noise differ from sound?
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Ultrasound
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Ultrasound
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UltrasoundUltrasound imaging: imaging the heart
heart valves
atrium
ventricle
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UltrasoundUltrasound imaging: carotid artery
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UltrasoundUltrasound imaging: carotid artery
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UltrasoundUltrasound imaging: carotid artery
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• Speed = Wavelength • Frequency• Using the symbols v, , and f, the equation can
be rewritten as• v = f •