Sound intensity of whispering is-: (A) 30 dB, (B) 90 dB, (C) 2 dB, (D) 120 dB
Answer is A. Ans. is 'a' i.e., 30 dB o Intensity is the strength of sound which determines its loudness. It is usually measured in decibels (dB).o Following are intensities when a person is at a distance of one meter from sound source.Intensity WhisperNormal conversationShoutDiscomfort of earPain in ear30 dB60 dB90 dB120dB130 dB