Q. What will be the resultant decibel level when there are 4 sources making noise of equal levels?
A. Decibel level will increase by 4 decibels.
B. Decibel levels will remain the same
C. Decibel level will increase by 8 decibels
D. Decibel level will increase by 6 decibels
Answer: Decibel level will increase by 6 decibels
