"Word decibel was coined in honour of Alexander Graham Bell"

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The word `decibel' was coined in honour of Sir Alexander Graham Bell who invented the telephone.


The lightest sound - that of a butterfly landing - would register zero on the decibel scale. Leaves rustling in a breeze would show 10 decibels. A friend whispering from a few feet away would register 20 decibels.


An ordinary conversation in an office area would notch up 50, the general noise in a department store may touch 60 decibels.


A hi-fi equipment at 10 watts playing pop music would be very close to the limit where sound can hurt or damage your ears! Sound hurts when it registers 130 on the decibel scale.

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