En Route Jet Aircraft Noise Analysis
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En Route Jet Aircraft Noise Analysis

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    • Alternative Title:
      Deliverable No. 3
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    • Abstract:
      Most research into commercial noise is primarily focused on reducing the community noise, noise that the local population near an airport experiences as aircraft takeoff and land. While this type of noise may be a main driver for the noise that communities experience, noise generated by an aircraft during climb, cruise, and descent segments of flight might also reach the ground and affect the noise level experienced by these communities. The noise from these sources can have the same annoying effects as those experienced during takeoff and landing. En route noise can become problematic and produce similar annoyance as that experienced near airports when aircraft are flying over rural areas. These areas have a lower ambient noise level than that of cites, and the noise generated by the aircraft will not be easily masked by that of other transportation modes. National Parks within rural areas are prime examples where the effects of en route noise may become significant. National Parks have an ambient noise level even lower than rural areas, and hence, the low frequency noise that is propagating from an aircraft overhead could have an adverse effect upon the wildlife within the park, as well as any visitors. There are numerous research efforts currently being funded to predict the propagation of en route noise to the ground, but the available prediction methods for the noise sources are unfortunately limited. This limitation exists because most noise prediction codes were created and validated on noise generated at low-altitude conditions, such as takeoff and landing. The research documented in this interim report will start to address the research gap in predicting en route noise sources by leveraging existing modeling capability. The objective of this research is to develop a prediction capability in Aircraft Environmental Design Tool (AEDT) for the far-field source noise generated by en route aircraft.
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