Today, sound is one of the detrimental factors in the workplace and its harmful impact has been so important that scientists have named it "Noise Pollutions".Hearing is one of the five senses of human being which is also a medium for communicating with other s and enjoying the pleasant feeling of listening to a piece of music. In spite of this, changes in the intensity and frequency of sound can make it annoying. Using Sound Level Meter to measure the dB of noise in the workplace and noise control principles will be discussed here.