engineering recuitment TNPSC AE Civil 2024 Test series Environmental Engineering Air and Noise Pollution
What will be the resultant decibel level when two sources make noise of equal decibels?
1
Decibel level will be the same
2
Decibel level will increase by 3 decibels
3
Decibel level will decrease by 3 decibels
4
Decibel level will be equal to the sum of decibels of the two sources