Ravi claims that turning up the volume on a radio makes the sound waves "bigger" but does not change the note you hear. Seema is not convinced. Resolve their argument by answering the questions below.
(i) Explain how an increase in amplitude of a sound wave affects its loudness.
(ii) State, with reason, whether a change in amplitude alters the pitch of the sound.
(iii) Give any two everyday situations in which the amplitude of sound is deliberately increased or decreased without changing its pitch.