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        Definition 
        
        | The part of the sound vibration pattern with bunched-up particles. |  
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        Definition 
        
        | The part of the sound vibration pattern with spread-out particles. |  
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        Definition 
        
        | Any solid, liquid, or gas that carries the pattern of sound. |  
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        Definition 
        
        | The number of times an object vibrates in one second. |  
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        Definition 
        
        | A frequency of one vibration per second or one cycle per second. |  
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        Definition 
        
        | unit of relateive loudness |  
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        Term 
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        Definition 
        
        | The highness or lowness of the sound you hear. |  
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        Term 
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        Definition 
        
        | a sequence of events that is repeated again and again, especially a casual sequence |  
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        Term 
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        Definition 
        
        | Sounds which produce unorganized patterns of vibrations. |  
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        Term 
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        Definition 
        
        | The tendency for an object to vibrate at the same frequency as another sound source. |  
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        Definition 
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        Term 
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        Definition 
        
        | Sounds that generally produce organized vibration patterns. |  
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        Term 
        
        | Reticular Activating System (RAS) |  
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        Definition 
        
        | An area of the human brain that sorts out all the information provided by the senses.  This regulates a person's level of awareness by screening messages from the senses and passes on only the important or unusual ones. |  
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