Term
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Definition
| area of bunched-up air pariticles created by an object's vibrations, which push the air particles in front of its movements closer together; compressions and rarefactions spread out from the vibrating object in all directions and pass through a medium to provide sound |
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Definition
| area of spread out air particles created by an object's vibrations that occurs opposite an are of compression and rarefaction traveling through a medium |
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Definition
| any sound conducting liquid, solid, or gas; for example, you hear most sounds through the medium of air, which conducts the sound produced by a vibrating object to your ears |
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| number of times an object vibrates in 1 second; frequency is measured in hertz and is recognized by your ears as differences in pitch |
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| unit that measures frequency of 1 vibration/second or cycle/second; for example, dolphins hear sounds up to about 155,000 hertz (hz) |
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Definition
| the highness of lowness of a sound; the slower the vibration of an object the lower its itch, and the faster its vibration, the higher its pitch |
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| Explain how a vibrating object that is some distance away from you causes your eardrums to vibrate. |
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Definition
| it creates a pattern of compression and rarefaction in the particles in the air which is carried to your ear |
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Term
| Why can you identify different musical instruments just by listening, even when they are playing the same pitch? |
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Definition
| instruments have different sound qualities depending on their shape, size and material |
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Term
| All sounds are produced by ____________. |
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Definition
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| _________ is made up of particles so tiny you cannot see them. |
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Definition
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| ________ produce sound by creating patterns of compression and rarefaction. |
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Definition
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Term
| Your ears give you ________ about things you can't see. |
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Definition
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Term
| The number of times an object moves back and forth in one second is one way to keep track of an objects _________. |
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Definition
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| Your ears recognize differences in sound __________ ad differences in pitch. |
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Definition
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Term
| Both music and noise are ________. |
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Definition
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Term
| ________ are visual records of sound vibrations. |
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Definition
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| Objects that create noise in contrast to music produce _______________. |
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| The type of material from whch an object is made and the object's shape also affect the frequency at which an object _________. |
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Definition
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| __________ produce the lowest notes, while _________ produce higher notes. |
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Definition
| longer pipes, shorter pipes |
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Term
| A ________ vibrating alone sets some particles of air in motion. |
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Definition
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Term
| What must you know inorder to determine the frequency or pitch of a sound source? |
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Definition
| how many times the sound source vibrates |
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Term
| What creates the pattern of sound that travels to your ear when an object vibrates? |
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Definition
| compression and rarefaction |
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Term
| In what unit is frequency measured? |
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Definition
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Term
| How does sound travel in air compared to water? |
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Definition
| sound travels faster in water than in air |
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