On August 10, 2009, the Transportation Research Board released ACRP Synthesis 16:  Compilation of Noise Programs in Areas Outside DNL 65, prepared by Mary Ellen Eagan and Robin Gardner of the noise consulting firm HMMH.  The Report examines the regulatory framework of measures to address noise below DNL 65 dB, presents the results of a survey of 35 airports, and describes case studies of two communities’ efforts to address noise beyond DNL 65 dB.