Introduction to the noise control technology

Physics definition

Noise is the rules of a body does not sound.

Physiology to define

That interfere with the voice of the people to rest, study and work normal, as well as to the people to listen to the voice of the disturbance of noise. In this sense, the source of the noise a lot. On the streets of automobile sound, the voice of a quiet in the library, rolling on the construction site, and neighbors TV set is too large, is noise.

The whole vibration noise is object.