Helicopter noise survey for selected cities in the contiguous US

The remainder of this report (after the introduction) is organized as follows. Chapter 2 describes the methodology used in the noise measurement surveys. Chapter 3 describes the noise monitoring equipment used. Chapters 4 through 8 present the noise measurement data obtained from the standard sets of helicopter maneuvers and from in-service (not test) helicopter operations at each of five cities surveyed. Each of these chapters is divided into sections with the following headings: Overview of Helicopter Operations, Land Use and Helicopter Noise Abatement Procedures; Standardized Maneuver Tests, and Actual In-Service Helicopter Operations. In addition, Chapter 7 (Chicago, IL) also contains a section which presents the noise data measured for actual in-service operations at a public use heliport.