When should dosimetry monitoring be conducted in relation to noise levels?

Dosimetry monitoring should be conducted when sound level meter (SLM) measurements exceed 85 dBA, as this level is significant for the assessment of potential hearing loss due to occupational noise exposure. The 85 dBA threshold is a key standard set by organizations such as the Occupational Safety and Health Administration (OSHA) and the National Institute for Occupational Safety and Health (NIOSH), which indicates that at or above this level, there is an increased risk of hearing damage over time with prolonged exposure.

Monitoring at this level allows for the implementation of necessary hearing conservation measures, such as the use of hearing protection devices or modifications to work practices, to prevent hearing loss among workers frequently exposed to high noise levels. It acts as an early warning signal to evaluate the noise exposure contributions and to take remedial actions to protect workers' auditory health effectively.

The other levels presented in the choices either do not align with the established guidelines on managing hearing risks in occupational settings or do not trigger the recommended response actions related to hearing conservation programs. Thus, monitoring at levels below 85 dBA does not prompt the same level of urgency for intervention and is not typically part of standard dosimetry practices.