Distinguish between the terms
(i) music and noise (ii) tone and note
(i) Music The sound which is pleasant to the ears is called music. It is produced by regular periodic vibrations. There is no sudden change in loudness, e.g. Sound produced from a tabla.
Noise The sound which is unpleasant to the ears, is called noise. It is produced at an irregular intervals. There is sudden change in its loudness, e.g. Sound produced in a market and the sound produced by an explosion.
(ii) Tone The sound of single frequency is called a tone.
Note The sound which is a mixture of several frequencies is called a note.