History of DNL 65

Tue Sep 8th, 2015 02:13 AM

This noise measurement standard is the most important arsenal the FAA uses against people. It is important to understand it. This is a history of the Day Night average sound level (DNL), which the FAA uses as their model for noise thresholds. Things were different in the 60s and most of the studies were done in dense urban areas near airports.

The History of DNL 65