REPORT DOCUMENTATION PAGE Form Approved OMB No. 0704-0188 Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Washington Headquarters Services, Directorate for information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302, and to the Office of Management and Budget, Paperwork Reduction Project (0704-0188), Washington, DC 20503. 1. AGENCY USE ONLY 2. REPORT DATE 3. REPORT TYPE AND DATES COVERED (Leave blank) January 2008 Final Jan 02 – Mar 08 4. TITLE AND SUBTITLE 5. FUNDING NUMBERS Integrated Noise Model (INM) Version 7.0 Technical Manual FA-4T/ES205 6. AUTHOR(S)1 2 1 DTFAAC-05-D-00075 Eric R. Boeker , Eric Dinges , Bill He (FAA Program Manager), Gregg Fleming , 1 4 1, 2 Task Orders 4, 6, 10 Christopher J. Roof , Paul J. Gerbi , Amanda S. Rapoza Justin Hemann 7. PERFORMING ORGANIZATION NAMES AND ADDRESSES 8. PERFORMING ORGANIZATION 1 U.S. Department of Transportation 2 ATAC Corporation REPORT NUMBER Research and Innovative Technology Administration 755 N. Mathilda Ave Ste 200 John A. Volpe National Transportation Systems Sunnyvale, CA 94085 Center Acoustics Facility, RTV-4F Kendall Square Cambridge, MA 02142-1093 9. SPONSORING/MONITORING AGENCY NAMES AND ADDRESS 10. SPONSORING/MONITORING 3 U.S. Department of Transportation AGENCY REPORT NUMBER Federal Aviation Administration Office of Environment and Energy 800 Independence Avenue, S.W. FAA-AEE-08-01 Washington, DC 20591 11. SUPPLEMENTARY NOTES 4 CSC Corporation Kendall Square Cambridge, MA 02142 12a. DISTRIBUTION/AVAILABILITY STATEMENT 12b. DISTRIBUTION CODE This report is part of the INM Version 7.0 software release. 13. ABSTRACT (Maximum 200 words) The Federal Aviation Administration, Office of Environment and Energy (FAA, AEE-100) has developed Version 7.0 of the Integrated Noise Model (INM) with support from the John A. Volpe National Transportation Systems Center, Acoustics Facility (Volpe Center) for development of the acoustic computation module, and from the ATAC Corporation for systems integration, development of the graphical interface, and methods for computing aircraft flight profiles and constructing flight paths, which are processed by the acoustics module. This Technical Manual describes the core technical components in INM Version 7.0, including the flight-path methodology (Chapter 2), along with the basic methodology employed by the INM to compute noise levels or time-based metrics at a single, user-specified observer, or at an evenly-spaced, regular grid of observers (Chapter 3). The noise/time computation methodology includes a description of: (1) computation of the flight-segment geometric and physical parameters; (2) flight-segment noise-level interpolation process; (3) atmospheric absorption adjustment; (4) acoustic impedance adjustment; (5) flight-segment noise-fraction adjustment for exposure-based metrics; (6) aircraft speed adjustment for exposure-based metrics; (7) updated lateral attenuation adjustment; (8) ground-based directivity adjustment for observers behind start-of-takeoff-roll, as well as for computing metrics associated with run-up operations; (9) new helicopter noise modeling capabilities and associated adjustments (including advancing tip mach number, lateral directivity, static directivity and static duration adjustments); (10) metric computation process; and (11) development of a recursively-subdivided irregular grid methodology, which is used for computing noise contours (Chapter 4). 14. SUBJECT TERMS 15. NUMBER OF PAGES Airport Noise, Computer Model, Noise Contours, Integrated Noise Model, 210 INM, Noise-Level Prediction, Noise-Level Metric, Day-Night Average Sound Level, Ldn, DNL, Heliport Noise Model, Helicopter Noise, FAR Part 16. PRICE CODE 150, Impact, Land Use Planning, SAE-AIR-1845, ECAC Doc 29, SAE-AIR-5662 17. SECURITY 18. SECURITY 19. SECURITY 20. LIMITATION OF CLASSIFICATION CLASSIFICATION CLASSIFICATION ABSTRACT OF REPORT OF THIS PAGE OF ABSTRACT Unclassified Unclassified Unclassified NSN 7540-01-280-550 Standard Form 298 (Rev. 2-89) Prescribed by ANSI Std. 239-18 298-102 INM 7.0 Technical Manual PREFACE This document is the Technical Manual for the FAA's Integrated Noise Model (INM) Version 7.0 computer software, which is designed to predict noise impact in the vicinity of airports. This is a full revision to the INM Version 6.0 Technical Manual. In addition to the algorithms for modeling helicopter noise, the INM Version 7.0 Technical Manual presents the methodology employed to design aircraft flight paths and to compute noise-level and time-based metrics based upon the finite flight-segment data. Those technical updates not only made INM Version 7.0 more compliant with the new international standards, but also prepared INM for integrated modeling of both noise and emission – the FAA’s ongoing development of Aviation Environmental Design Tool (AEDT). The ATAC Corporation, the John A. Volpe National Transportation Systems Center Acoustics Facility (Volpe Center), and the Federal Aviation Administration (FAA) Office of Environment and Energy Noise Division (FAA AEE-100) have jointly prepared this document DISCLAIMER This document was produced by ATAC Corporation and the John A. Volpe National Transportation Systems Center Acoustics Facility staff, who are responsible for the facts and accuracy of the material presented herein. The contents do not necessarily reflect the official views or policy of the U.S. Department of Transportation or the Federal Aviation Administration. This INM Technical Manual does not constitute a standard, specification, or regulation. i INM 7.0 Technical Manual ii INM 7.0 Technical Manual TABLE OF CONTENTS Chapter Page PREFACE…….. .................................................................................................................................... i DISCLAIMER … .................................................................................................................................... i TABLE OF CONTENTS .................................................................................................................... iii LIST OF FIGURES ............................................................................................................................ vii LIST OF TABLES ............................................................................................................................ viii 1 INTRODUCTION......................................................................................................................... 1 1.1 Terminology ............................................................................................................................ 2 1.2 Grid-Point Computations ...................................................................................................... 15 1.3 Metric Families ..................................................................................................................... 15 1.4 Metric Types ......................................................................................................................... 16 1.4.1 Exposure-Based Metrics ........................................................................... 18 1.4.2 Maximum Noise Level Metrics ................................................................. 19 1.4.3 Time-Based Metrics .................................................................................. 20 1.5 Abbreviations ........................................................................................................................ 21 2 FLIGHT-PATH COMPUTATION METHODOLOGY ........................................................... 23 2.1 Summary of Input Data for Noise Computation ................................................................... 23 2.1.1 Airport/Heliport Information ..................................................................... 23 2.1.2 Aircraft Information .................................................................................. 24 2.1.3 Observer Information ................................................................................ 24 2.1.4 Noise Metric Information .......................................................................... 25 2.2 Input Database ....................................................................................................................... 26 2.2.1 Noise-Power-Distance Data Sets............................................................... 26 2.2.2 Spectral Data Sets ...................................................................................... 27 2.2.3 Maximum Noise Level Approximation .................................................... 29 2.2.4 C-Weighted Metric Approximation .......................................................... 30 2.2.5 NPD Data Development Criteria ............................................................... 30 2.3 Civil and Military Fixed-Wing Aircraft Flight Profiles ........................................................ 31 2.3.1 Profile Point Input Data ............................................................................. 31 2.3.2 Procedure Step Input Data ........................................................................