A comprehensive workplace noise survey is crucial for identifying noise hazards, assessing employee exposure, and implementing effective noise control measures. This process involves several key procedures and steps, starting with the selection and calibration of appropriate measuring equipment.
The first step in conducting a noise survey is to select the right equipment. A sound level meter (SLM) is the primary instrument used for measuring noise levels. SLMs come in different classes, with Class 1 instruments being the most accurate and suitable for research and high precision work, and Class 2 instruments being more commonly used for general industrial hygiene surveys. The selection of the SLM should be guided by the relevant occupational health and safety standards and requirements of the specific survey. Additionally, a noise dosimeter is often used for measuring the personal noise exposure of individual employees over a work shift. Dosimeters are small, body-worn devices that capture the noise exposure at a worker's ear. When selecting a dosimeter, factors such as the user-friendliness, the measurement range, battery life, and data logging capabilities should be considered. It’s also important to ensure that the measurement range of the equipment is sufficient for the noise levels expected in the workplace, and the frequency response is appropriate. For example, if there is substantial low-frequency noise, a C-weighted measurement should also be taken in addition to the A-weighted measurement. If impulsive noise is expected, the device should have the capability to capture the peak noise level.
Before any measurements are taken, the sound level meter and noise dosimeter must be calibrated. Calibration ensures the accuracy of the measurement and involves using a sound level calibrator. This calibrator generates a stable, known sound pressure level at a specific frequency. The SL....
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