Music and noise in music are two different sounds, and they have different functions and meanings in music.

1. Musical sound refers to regular, rhythmic and harmonious sounds, usually produced by musical instruments or human voices. Musical sound has obvious elements such as pitch, length and intensity, and can form melody, harmony and other musical forms. It is one of the most basic and important elements in music.

2. Noise refers to sounds with no rules, no rhythm, and no harmony, which are usually emitted by mechanical, electronic and other equipment. Noise has elements such as uncertain pitch, length, and intensity, and cannot form musical forms such as melody and harmony. However, it also has its unique value and role in certain musical works.

3. In music, tones and noises can exist. While sound is one of the most basic and important elements of music, noise can also add unique colors and effects to music. For example, in some modern music works, noise is widely used and has become an indispensable part of music.

4. In some traditional music works, noise is also used skillfully, adding more layers and changes to the music. Therefore, tones and noises can exist in music. Each of them has different characteristics and functions, complementing and setting off each other, and together constitute a rich and colorful music world.

Causes of noise

1. Mechanical movement: Many machines and equipment produce noise when they are running. For example, when mechanical equipment such as motors, engines, and grinders are running, they will produce noise due to mechanical friction, vibration, and other reasons.

2. Air movement: Air movement also produces noise. For example, the air flow movement of fans and air compressors will produce noise. Electromagnetic fields: Changes in electromagnetic fields can also produce noise. For example, when electrical appliances such as induction cookers and microwave ovens are working, they will produce changes in the electromagnetic field, thereby producing noise.

3. Vehicles: Vehicles also produce noise when driving. For example, when cars, trains, airplanes, etc. are driving, they will produce noise due to friction between tires and the ground, engine operation, etc.