ASA S12.2-2019 PDF Download

Guidelines for assessing the noise levels in various types of rooms are provided by the ASA S12.2-2019 standard. The standard specifies three key approaches for assessing room noise. 

The first technique makes use of the A-weighted sound level and is known as the survey technique. With this technique, the noise levels in the room are measured using tools that account for the human ear's sensitivity to various frequencies. The room's compliance with the desired noise regulations is then determined by comparing the measured sound levels to the required norms.

The engineering method, which uses extended noise criteria (NC) curves, is the second technique. The allowable noise levels for various frequencies in various types of rooms are shown by these curves. Engineers can assess whether the space is within the permissible range or if additional noise control measures are required by comparing the measured noise levels to the NC curves.

The standard also contains a technique for assessing low-frequency fluctuation noise using RNC curves. Low-frequency noise can be annoying and call for extra attention. The RNC curves offer standards for assessing and managing low-frequency noise levels in enclosed spaces.