Construction equipment including compressors, saws, nail guns, and pile drivers generate high noise levels that can cause permanent hearing loss. Hearing conservation programs must be implemented when employee noise exposure reaches 85 decibels (dB) as an 8-hour time-weighted average. Noise levels must be measured using sound level meters or dosimeters. Engineering controls such as equipment with reduced noise ratings or enclosures around noise sources must be the primary noise reduction method. Substituting quieter equipment or processes can significantly reduce noise. Acoustic barriers can block noise from spreading. Administrative controls such as scheduling noisy work during periods when fewer workers are present can reduce overall exposure. Personal protective equipment including earplugs and earmuffs must be used when noise levels exceed 85 dB. Hearing protection must be properly inserted or fitted to be effective. Training must cover proper use and care of hearing protection. Annual audiometric testing must document hearing levels and identify workers showing signs of hearing loss. Workers with hearing loss must be notified and provided additional hearing protection. Information about hearing loss and prevention methods must be shared with employees. Hearing protection devices must be selected for the noise frequency and intensity of the job. Double protection (earplugs and earmuffs) may be necessary in very loud environments.