in order to control the level of noise in the workplace, a noise dosimeter which is a device that is used to measure the amount of noise in a workplace over time is used. these devices can be worn on the body of a worker to record the level of sound they hear throughout their whole work day as they move to different areas of the workplace. they can also be used to measure the level of noise in a large specific area of the workplace. how the device is used depends on the work environment. some workers will be walking to different areas of a workplace throughout the whole day and hear different levels of sound but some will only be staying in one area. if the noise dosimeter shows that the level of noise reaches the exposure action value, the employer needs to start using the program they have created to stop any future damage to their worker's hearing health.