Noise

Broadly speaking, noise is the sound that does not like the nature of the resonance is always changing and can interfere with a person. Noise is a subjective line is the sound of an unwelcome or unexpected. In the environment, closely related to engine noise, vibration noise that is caused by a device or machine that can interfere with our hearing. Noise induced hearing loss as a result of exposure to noise is quite loud in a long time and is the type most commonly deafness sensorinueral dijupai after presbycusis. Noise intensity of 85 decibels (dB) or more can cause damage to hearing receptors of Corti in the inner ear. The nature of deafness is the cochlear nerve deafness and usually occurs in both ears. Many things are easier for a person became deaf due to exposure to loud noise such as a higher intensity, high-frequency, longer exposure to noise, the sensitivity of the individual and other factors that can cause deafness. Industrial noise has long been a problem that until now have not been able to overcome the well so that it can be a serious threat to the hearing of workers, because it can cause permanent hearing loss. As for the industrial, noise can cause economic losses because of the indemnity. It is therefore necessary to prevent oversight and inspection of the factory workers regularly hearing.