TagFAA(514)

This diagram explains the DNL (Day-Night Average Sound Level) metric used in airport noise policy, showing a bar chart of hourly LEQ sound levels (in dBA) over a 24-hour period labeled 'One Day of Events (DNL).' It highlights the 10-dB nighttime penalty applied to noise events occurring during nighttime hours, which is a standard FAA methodology for calculating community noise exposure.

An educational diagram illustrating acoustic measurement concepts including Sound Exposure Level (SEL), Lmax, LEQ, and energy, plotted as sound level (dB) over time (seconds). The graphic shows how SEL compresses a noise event's total energy into a normalized 1-second value, with Lmax appearing approximately 10dB above the LEQ reference line.

A speaker addresses the room from a podium bearing the Seal of the President of the United States, while a second man in a navy suit and pink tie stands to the right holding a green official folder. The setting appears to be the Roosevelt Room or a similar formal White House venue, with an American flag and painted portrait visible in the background.

A black-and-white photograph taken inside what appears to be the White House, showing three men in suits near a doorway. A sign on an easel prominently reads 'Largest Deregulation in U.S. History' and displays the Presidential Seal.