What device is worn by employees to measure their average noise dose over time?

The device used by employees to measure their average noise dose over time is a noise dosimeter. This instrument is specifically designed to record the noise exposure an employee receives throughout their work shift. It provides an integrated measurement, taking into account both the intensity and duration of the noise they are exposed to.

A noise dosimeter often clips onto an employee's clothing and monitors the sound levels in their environment continuously, ensuring accurate measurement of noise exposure in real-world working conditions. The recording includes variations in noise levels, allowing for a comprehensive assessment of whether an employee's exposure exceeds permissible levels set by safety regulations.

In contrast, a sound level meter measures the sound level at a specific moment in time but does not account for duration, while a decibel meter typically serves similar functions as the sound level meter. A vibration analyzer is unrelated to noise exposure, focusing instead on vibrations within equipment and structures. Thus, the noise dosimeter is the appropriate choice for assessing cumulative noise exposure in employees.