Abstract
In conformance with the Noise Control Act of 1972, the Environmental Protection Agency (EPA) has proposed to the Federal Aviation Administration (FAA) for promulgation eleven regulations for the control of aircraft noise and is considering several more. The EPA's proposed regulations logically fall into three categories defined by the segment of the aviation community that would be regulated, that is, manufacturers, aircraft operators, and airport operators. Those categories can be interpreted, with some liberties taken to suit the subject (aviation), to represent the source, path, and receiver noise control options which are commonly used in the discipline of acoustics as a technique for subdividing complex noise control problems into managable parts. Also, where noise control capability is highly dependent upon technology, which is always true for source control of aircraft noise, the EPA's proposed regulations are time-phased. That is, the noise requirements are based upon the results of past, present, and future programs of research, development, and demonstration which can be classified in terms of current, available, and future noise control technology. The concepts of abating aircraft noise by exercising the source, path, and receiver noise control options taken together as a system and by time-phased regulations are described. Regulations proposed by the EPA designed to implement those concepts are presented as examples. Specific regulations which are time-phased in terms of current, available, and future noise control technology are examined in more detail and the economic consequences discussed.
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