The decibel scale is useful because A   it can be used to represent the very large range of pressure differences that humans hear. B   it is a measure of loudness and not stimulus amplitude. C   loudness is related only to the frequency of the stimulus.  D   loudness is related only to the amplitude of the stimulus.

Physics for Scientists and Engineers: Foundations and Connections
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Chapter18: Superposition And Standing Waves
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Problem 54PQ: Dog whistles operate at frequencies above the range of human hearing. Explain how two such whistles...
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The decibel scale is useful because

A  

it can be used to represent the very large range of pressure differences that humans hear.

B  

it is a measure of loudness and not stimulus amplitude.

C  

loudness is related only to the frequency of the stimulus. 

D  

loudness is related only to the amplitude of the stimulus. 

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