engineering recuitment OSSC Combined Technical Services (ଓଡିଶା) Mock Test 2023-24 Environmental Engineering Air and Noise Pollution
According to the world health organisation, what is the recommended range of the audiometric sound values for moderate hearing impairment?
1
26-40 dB
2
61-80 dB
3
81 dB and above
4
41-60 dB