FERC 55 dBA Ldn Compliance
Ldn adds 10 dBA penalty to nighttime noise
Understand sound propagation, distance attenuation, and FERC noise requirements
FERC requires that compressor stations and gas facilities not exceed a day-night sound level (Ldn) of 55 dBA at the nearest noise-sensitive area.
It calculates the sound level at a given distance from a noise source to determine FERC Ldn compliance at the property line for compressor stations and gas facilities.
Ldn (day-night average sound level) is a 24-hour noise metric that adds a 10 dB penalty to nighttime sound levels to account for increased sensitivity during sleeping hours.