Aircraft Taxi Noise Database for Airport Noise Modeling

The Federal Aviation Administration's (FAA's) Integrated Noise Model (INM) is the agency's required tool for NEPA-related studies and FAR Part 150 studies. The transition of INM into the Aviation Environmental Design Tool (AEDT) is a prime example of the commitment of FAA to improving aviation environmental assessment computational capabilities. The AEDT program will achieve an important milestone in integrating FAA legacy tools and improving on their accuracy and functional capability to assess airport noise. For instance, improvements include changes in acoustic, emissions, and performance modeling capabilities, as well as improvements to noise-power-distance (NPD) curves, lateral attenuation algorithms, and relative-humidity absorption. ACRP recently contributed a key improvement to the noise modeling tools through Project 11-02/Task 8, "Enhanced Modeling of Aircraft Taxiway Noise." The objective of this scoping project was to determine the best way to model airport noise from aircraft taxi operations and to create a plan for implementing a taxi noise prediction capability into INM in the short term and AEDT in the longer term. One of the outcomes of the project revealed that the primary weakness for taxi noise modeling is related to a definition of engine source noise characteristics--level, spectra, and directivity. Currently, there is no direct noise database for taxiing operations--within the current INM/ AEDT models; source noise is obtained through an approximate extrapolation of NPD data. For long-term requirements it was suggested that additional measurements be made for taxi operations where synchronized noise and engine operating parameters can be obtained, so as to determine the noise sensitivity at low thrust settings and allow a realistic evaluation of breakaway thrust impact. This would require a considerable field measurement effort with extensive coordination with cooperating airlines. A short-term solution to the problem, suggested in the ACRP Project 11-02/Task 8 report, is to develop a noise, spectral class, and directivity database for a nominal taxi state by processing existing measurement data from a study conducted at Madrid Barajas International Airport. Although comprehensive, this measured dataset does not address all aircraft in common use at U.S. airports and needs to be supplemented with additional measurements for specific aircraft types. These measurements will record a sufficient number of taxi operations in order to develop statistically valid nominal taxi operating state source characteristics. The resulting database will remove the weakness in the current INM noise database and allow for much improved taxi noise estimates. The objective of this research is to use existing measured data, supplemented by a modest measurement program, to develop a comprehensive database of Noise/Spectral Class/Directivity characteristics for commercial aircraft operating at U.S. airports.</font></div>


  • English


  • Status: Proposed
  • Contract Numbers:

    Project 2-27

  • Sponsor Organizations:

    Federal Aviation Administration

    800 Independence Avenue, SW
    Washington, DC  USA  20591

    Airport Cooperative Research Program

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC    20001
  • Project Managers:

    Goldstein, Lawrence

  • Start Date: 20100710
  • Source Data: RiP Project 24420

Subject/Index Terms

Filing Info

  • Accession Number: 01461809
  • Record Type: Research project
  • Source Agency: Transportation Research Board
  • Contract Numbers: Project 2-27
  • Files: TRB, RiP, USDOT
  • Created Date: Jan 3 2013 1:52PM