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18 - Aircraft Noise: Flight Trajectories

Published online by Cambridge University Press:  05 January 2013

Antonio Filippone
Antonio Filippone
Affiliation:
University of Manchester
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Summary

Overview

In Chapter 16 we discussed various methods that can be used for the rapid prediction of aircraft-noise sources. In Chapter 17 we described the effects of atmospheric propagation, interference and scattering. In this chapter we deal with aircraft-noise trajectories. In particular, we discuss noise certification (§ 18.1) and noise-abatement procedures (§ 18.2). The implementation of the various sub-models requires a flight mechanics integration (§ 18.3) and a data-handling structure, to process the large matrices produced by several noise sources. A noise sensitivity analysis is presented (§ 18.4) to show the relative importance of the various noise sources to explain the most useful strategies for noise reduction. We discuss two case studies: the ICAO/FAR noise trajectories of a jet-powered aircraft (§ 18.5) and the ICAO/FAR noise trajectories of a turboprop aircraft (§ 18.6). We also present a number of noise applications, such as steep descent and wind effects (§ 18.7). To complete our discussion of the noise modelling, we provide an example of verification with flight data (§ 18.8). The last item of investigation is the noise footprint around the airfield (§ 18.9).

KEY CONCEPTS: Aircraft Noise Certification, Noise-Abatement Procedures, Flight- Mechanics Integration, Noise Sensitivity, Noise Trajectories, Wind Effects, Footprints, Sonic Boom.

Aircraft Noise Certification

Unlike a Beethoven symphony, aircraft noise is not welcome music to the ear. The second movement of the Ninth Symphony does not start with a landing-gear deployment. Communities that live near large airports know this fact rather well. In fact, they have been making noise on their own by voicing their concern.

Type
Chapter
Information
Advanced Aircraft Flight Performance , pp. 553 - 588
Publisher: Cambridge University Press
Print publication year: 2012

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References

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