The optimum sound level for human being is:

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Submitted by examrobotsa on

Q: 48 (RAS/2012)
The optimum sound level for human being is:
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question_subject: 

Science

question_exam: 

RAS

stats: 

0,4,10,5,4,5,0

keywords: 

{'optimum sound level': [0, 0, 0, 1], 'db': [0, 0, 0, 1], 'human being': [1, 0, 0, 6]}