At which level sound is painful -
Intensity

Whisper - 30 dB
Normal conversation - 60 dB
Shout - 90 dB
Discomfort of ear - 120 dB
Pain in ear -130 dB

Ref. Dhingra, 6/e, p 19
100-120dB
80-85dB
60-65dB
20-25dB