What determines the loudness of a sound? What is the unit of loudness?
1. Loudness is determined by the amplitude of vibration. [0.5 Mark] 2. Unit of loudness is decibel. [0.5 Mark]
(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.
What is the unit of loudness? What is approximate loudness of a whisper?
The ……………of the sound wave determines its loudness.