 |
|
 |
3.7 Rotorcraft Noise ReductionCurrently, noise pollution is a topic of considerable interest, especially near airports and vertiports. Construction of a new airport or vertiport--or even the introduction of a new aircraft type at an existing facility--requires that an Environmental Impact Study be performed. To assess the impact on a nearby community, Environmental Impact Studies and Land Use Planning Assessments require estimates of the noise footprints that will be generated by aircraft using a facility. Measuring the noise footprints directly for every aircraft under numerous operating conditions would be extremely expensive.
A tiltrotor aircraft is used in tests that compare noise "footprints" predicted using the Rotorcraft Noise Model with measured values. Comparisons show good agreement, helping to validate the prediction model. The Rotorcraft Noise Model (RNM), developed by Wyle Laboratories under contract to NASA, was tested and validated in FY 1999. It is a tool for predicting ground noise footprints generated by rotorcraft. RNM can predict the ground noise footprint for complex flight profiles if given the noise characteristics of a vehicle under a variety of operating conditions. The input noise characteristics can be acquired from existing databases; measured in a simpler, less costly flight test; or generated using an aeroacoustic prediction code. RNM can also be used as a research tool to design flight procedures for noise abatement. The adverse impact on a community adjacent to a facility can be reduced by tailoring flight procedures to minimize the noise exposure at given locations around the facility. These noise abatement or "fly neighborly" flight procedures can improve the quality of life for people living near airports/vertiports by reducing their exposure to high noise levels.
NASA POC:
|
 |
|
 |
NASA Headquarters Responsible Official: Code R
Curator: SAIC Information Services http://www.aerospace.nasa.gov |
