Land Use and Average Noise Level Compatibility

Noise conditions are characterized in terms of A-weighted decibels (dBA), using the following common descriptors: (1) equivalent sound level for twenty-four-hour periods, Leq(24), and (2) day-night sound level, Ldn. The former is a time-weighted average; the latter is weighted more heavily for noise during the night (for more detail, refer to Chapter 6).

In general, local ordinances regulate noise outside the workplace, usually as a nuisance, and normally do not have applicable standards. Similarly in most situations, no federal or state noise standards apply. Regulatory agencies have developed guidelines to assist in land use planning and in situating major facilities that generate significant

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