Tehran Noise Pollution A whisper is 35 dB and a normal room has a sound intensity of 40 dB. At 45 dB, a person cannot sleep. At 85 dB, the ears are damaged, and at 120 dB, it can be explosive, the Persian-language newspaper ‘Salamat’ reported. Previous Next 1 2 3 4 5 6 7 8 2017-08-01 admin Share ! tweet