Hz. Age correction factors can be applied to the change in order to compensate for hearing loss that is age-related rather than work-related. If an STS is found, OSHA requires that the employee be notified of this change within 21 days. Furthermore, any employee that is not currently wearing HPD is now required to wear protection. If the employee is already wearing protection, they should be refit with a new device and retrained on appropriate use. Another determination that is made includes whether an STS is “recordable” under OSHA standards, meaning the workplace must report the change to OSHA. In order to be recordable the employee’s new thresholds at 2000, 3000, and 4000 Hz must exceed an average of 25 dB HL. MSHA standard differs slightly in terms of calculation and terminology. MSHA considers whether an STS is “reportable” by determining if the average amount of change that occurs exceeds 25 dB HL. The various measures that are used in occupational audiometric testing allow consistency in standards within workplaces. Completing baseline and follow-up audiograms allows workplaces to detect hearing loss as early as possible and determine whether changes need to be made to provide a safe working environment for their employees. Employee training and education Proper training and education of those exposed to noise is the key to preventing noise-induced hearing loss. If employees are properly trained on how to follow a hearing conservation program, then the risk of noise-induced hearing loss is reduced. By providing information on the physiological effects of noise exposure, the importance of obtaining baseline and annual audiograms, and use of appropriate hearing protection, the program will provide a thorough knowledge base for employees involved. Providing a refresher training when appropriate will support retention of this information. OSHA requires this training to be completed on an annual basis. Proper training is imperative since "even with a very modest amount of instruction attenuation performance can be significantly improved." Resources needed to carry out a hearing conservation program To carry out a hearing conservation training, the program may utilize a variety of materials to relay the necessary information. An assortment of written, video, audio, and hands on experience may make the training more interactive and meaningful to employees. It is recommended that materials also be translated into languages other than English so all employees can attend and benefit from the training. Pre- and post-assessments, a safe and secure