0 0 votes The equivalent sound power level (in dB) of the four sources with the noise levels of $60$ dB, $69$ dB, $70$ dB and $79$ dB is ______ Noise Pollution gate2017-ce-1 numerical-answers noise-pollution environmental-engineering measurement-of-noise + – Milicevic3306 1.1k points answer Follow 0 reply
