What is the range of loudness when sound becomes painful?
Step1:
Loudness is measured in decibels (dB).
The sound above 80dB causes damage to the ability of hearing.
Complete the following sentences :
(a) The pitch of sound increases if its frequency ......................................
(b) If the amplitude of a sound is halved, its loudness becomes ......................
(a) What is meant by the 'loudness' of sound ? On what factor does the loudness of a sound depend ?
(b) Draw labelled diagrams to represent (a) soft sound, and (b) loud sound, of the same frequency.