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25 Cards in this Set
- Front
- Back
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Sound
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A series of vibrations that can be heard
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Compression
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An area where air is pushed together by vibrations
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Sound wave
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A moving pattern of high and low pressure that you can hear
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Amplitude
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Measure of energy a wave carries
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wavelength
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The distance from one compression to the next in a sound wave
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loudness
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measure of sound energy reaching your ear
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pitch
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measure of how high or low a sound is
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speed of sound
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rate of travel of a sound wave
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echo
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reflection of sound waves
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sonic boom
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Sound wave made by an object moving faster than the speed of sound
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Your brain gets signals from...
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tiny hairs that affect nerve cells as sound
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The length of the strings on a guitar affect...
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the pitch
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If a sound pitch is too high,
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its source is vibrating quickly
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An echo will sound most like the original sound...
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if you shout in a long hallway
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Sound waves travel away from the source...
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and in all directions
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A sonic boom is caused by an object moving faster than....
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the speed of sound
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Sound traveling through a Brick (SOLID)
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3,650 meters per second
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Sound traveling through Water (LIQUID)
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1,497 meters per second
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Sound traveling through air (GAS)
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340 meters per second
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The faster the vibration...
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the higher the pitch
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The pitch of a stringed instrument is affected by the...
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length of its string
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The sound's pitch is high so its source is...
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vibrating high (high frequency)
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What does cupping your hands around your mouth when you shout make the sound travel further?
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Because the sound waves have no where to go and bounce off your hand right back to your ear.
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Why do you think you often can see a plane in the air before you can hear it?
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There are two reasons why we can see a plane in the air before we hear it. The first reason is the fact that light moves faster than sound. Everything we see is the result of light reflecting off of an object and into our eyes, producing an image. Second, the plane might be too far. So, with that in mind, we might not even be able to hear the plane in the first place.
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Compare speaking softly to speaking loudly
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Neither is correct. The voice that is too loud hurts the listeners' ears -- the voice that is too soft is not being heard. In both cases, the message is being lost because listeners are unable to focus and it all boils down to volume.
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