What is the resultant noise level generated simultaneously from two sources with same intensity of 90 dB respectively?

What is the resultant noise level generated simultaneously from two sources with same intensity of 90 dB respectively?

Q. What is the resultant noise level generated simultaneously from two sources with same intensity of 90 dB respectively?

A.            95 dB

B.            90 dB

C.            91 dB

D.            93 dB

Answer: 93 dB

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