A logarithmic ratio between a measured quantity and a reference quantity

[Solved] The decibel is

Q.	The decibel is
A.	Unit of noise level
B.	A logarithmic ratio between a measured quantity and a reference quantity
C.	Quantity of noise per unit area
D.	A logarithmic ratio between a measured quantity and 100
E.	None of the above
Answer» B. A logarithmic ratio between a measured quantity and a reference quantity

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