EVS-EN ISO 9612:2025

ISO 9612 specifies a method for measuring workers’ exposure to noise in a working environment and calculating the noise exposure level. ISO 9612 deals with A-weighted levels but also applies to C-weighted levels. Three different measurement strategies are specified. The method applies for detailed noise exposure studies or epidemiological studies of hearing damage or other adverse effects.

The measuring process requires observation and analysis of the noise exposure conditions so that the quality of the measurements can be controlled. ISO 9612 provides methods for estimating the uncertainty of the results. Results of the measurements performed in accordance with ISO 9612 can provide useful information when defining priorities for noise control measures.

This standard is not intended for assessment of masking of oral communication or assessment of infrasound, ultrasound and non-auditory effects of noise. It does not apply to the measurement of the noise exposure of the ear when hearing protectors are worn.

ISO 9612:2025 text has been approved in Europe as EN ISO 9612:2025 without any changes.