Mark the incorrect difference between musical sound and noise
1. It is a periodic disturbance that repeats itself at regular intervals.
2. There is no sudden change in amplitude or loudness.
3. It is sufficiently rapid so that it can be ensured as a sense of continuity.
1. It is a non-periodic disturbance.
2. There are, very often, irregular sudden changes in amplitude or loudness, or both.
3. There is no sense of continuity.