[Code of Federal Regulations]

[Title 14, Volume 3]

[Revised as of January 1, 2006]

From the U.S. Government Printing Office via GPO Access

[CITE: 14CFR150.9]



[Page 76]

 

                     TITLE 14--AERONAUTICS AND SPACE

 

CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION 

                               (CONTINUED)

 

PART 150_AIRPORT NOISE COMPATIBILITY PLANNING--Table of Contents

 

                      Subpart A_General Provisions

 

Sec. 150.9  Designation of noise systems.



    For purposes of this part, the following designations apply:

    (a) The noise at an airport and surrounding areas covered by a noise 

exposure map must be measured in A-weighted sound pressure level 

(LA) in units of decibels (dBA) in accordance with the 

specifications and methods prescribed under appendix A of this part.

    (b) The exposure of individuals to noise resulting from the 

operation of an airport must be established in terms of yearly day-night 

average sound level (YDNL) calculated in accordance with the 

specifications and methods prescribed under appendix A of this part.

    (c) Uses of computer models to create noise contours must be in 

accordance with the criteria prescribed under appendix A of this part.