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Describe how hearing varies with frequency and amplitude.

What is the question?What is the definition of an equal-loudness contour?
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OK	Value	Feedback
	A graph that shows how our hearing varies over frequency and amplitude.	Excellent!
	Fletcher-Munson curves.	This is a type of equal-loudness contour, not the definition.
	We perceive some frequencies as louder than others.	This is the principle, but not the actual object.
	A graph that shows how our hearing varies over phase and amplitude.	The graph does not involve phase.

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