Aviation Safety and Noise Abatement Act (1979)
Congress passed a law directing the FAA to measure airport noise and set a threshold for significant exposure. The agency adopted 65 DNL as that line.
The FAA began mapping noise contours and funding mitigation for homes inside them.
The framework still governs how airports and the FAA address residential noise, including the standard at the center of the current grant.
This $22.8 million grant flows directly from that framework: the 65 DNL standard is the exact trigger for the funded work.
