An effective hearing conservation program must be implemented by employers in general industry whenever worker noise exposure is equal to or greater than 85 dBA for an 8 hour exposure or in the construction industry when exposures exceed 90 dBA for an 8 hour exposure. This program strives to prevent initial occupational hearing loss, preserve and protect remaining hearing, and equip workers with the knowledge and hearing protection devices necessary to protect them. Key elements of an effective hearing conservation program include: (1) Workplace noise sampling including personal noise monitoring which identifies which employees are at risk from hazardous levels of noise. (2) Informing workers at risk from hazardous levels of noise exposure of the results of their noise monitoring. (3) Providing affected workers or their authorized representatives with an opportunity to observe any noise measurements conducted. (4) Maintaining a worker audiometric testing program (hearing tests) which is a professional evaluation of the health effects of noise upon individual worker's hearing.(5) Implementing comprehensive hearing protection follow-up procedures for workers who show a loss of hearing (standard threshold shift) after completing baseline (first) and yearly audiometric testing. (6) Proper selection of hearing protection based upon individual fit and manufacturer's quality testing indicating the likely protection that they will provide to a properly trained wearer. (7) Evaluate the hearing protectors attenuation and effectiveness for the specific workplace noise. (8) Training and information that ensures the workers are aware of the hazard from excessive noise exposures and how to properly use the protective equipment that has been provided. (9) Data management of and worker access to records regarding monitoring and noise sampling. Each of these elements is critical to ensure that workers are being protected where noise levels are unable to be reduced below the OSHA required levels. See more from topic source: https://www.osha.gov/html/a-z-index.html