The present invention relates to a method, system and device for monitoring noise received by individuals operating in noisy environments.The device comprises a substantially credit card size housing and can be worn as a "badge". The device includes a monitoring means for monitoring sound, and a display for displaying various noise parameter values, including a percentage value of cumulative noise dose received by the device. The device includes an input key which enables a user to select one of a plurality types of hearing protection equipment, so the user can indicate to the device the hearing protection equipment they are wearing. This enables the device to monitor compliance. The device also includes an input key enabling the user to acknowledge when an unallowable noise dose level has been reached.