ध्वनि तीव्रता की डेसीवल मे – McqOptions

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1.	ध्वनि तीव्रता की डेसीवल मे वह अधिकतम सीमा जिसके ऊपर व्यक्ति सुन नही सकता है
A.	95DB
B.	70DB
C.	50DB
D.	85DB
Answer» B. 70DB

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