Sound intensity of whispering
Ans. is 'a' i.e., 30 dB * Following are intensities when a person is at a distance of one meter from sound source.Whisper30 dBNormal conversation60 dBShout90 dBDiscomfort of ear120 dBPain in ear130 dB
30 dB
60 dB
90 dB
120 dB
Environment and Health