Topic 2.3- Sound and Ultrasound

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What type of waves are sound waves?
Sound waves are longitudinal waves
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What do sound waves cause?
Sound waves cause vibrations in a medium, which are detected as sound
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What is the range of human hearing?
The range of human hearing is between about 20Hz and 20,000Hz
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What is the pitch of a sound determined by?
The pitch of a sound is determined by it's frequency
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What is the loudness of a sound determined by?
The loudness of a sound is determined by it's amplitude
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What can sound waves be?
Sound waves can be reflected (causing echoes) and diffracted
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What is ultrasound?
Ultrasound is acoustic (sound) energy, in the form of waves with a frequency above the upper limit of hearing for humans
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What can ultrasound be produced by?
Electronic systems can be used to produce ultrasound waves
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What happens when ultrasound waves meet a boundary between two different media, and what can this be used for?
Ultrasound waves are partially reflected when they meet a boundary between two different media. The time taken for the reflections to reach a detector can be used to determine how far away such a boundary is
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How can the distance between interfaces in various media be calculated?
Distance = Wave Speed x Time Taken
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How can ultrasound waves be used?
Ultrasound waves can be used in medicine- for pre-natal scanning and the removal of kidney stones
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Other cards in this set

Card 2

Front

What do sound waves cause?

Back

Sound waves cause vibrations in a medium, which are detected as sound

Card 3

Front

What is the range of human hearing?

Back

Preview of the front of card 3

Card 4

Front

What is the pitch of a sound determined by?

Back

Preview of the front of card 4

Card 5

Front

What is the loudness of a sound determined by?

Back

Preview of the front of card 5
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