Examination of the low frequency limit for helicopter noise data in the Federal Aviation Administration's Aviation Environmental Design Tool and Integrated Noise Model

Boeker, Eric R.; Schulz, Noah E.; John A. Volpe National Transportation Systems Center (U.S.)

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Examination of the low frequency limit for helicopter noise data in the Federal Aviation Administration's Aviation Environmental Design Tool and Integrated Noise Model

2010-04-19
By Boeker, Eric R. ; Schulz, Noah E.

[PDF-302.54 KB]

English

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Alternative Title:

Noise-Con 2010, Baltimore, MD, April 19-21, 2010
Creators:

Boeker, Eric R. ; Schulz, Noah E.

Boeker, Eric R. ; Schulz, Noah E. Less -
Corporate Creators:

John A. Volpe National Transportation Systems Center (U.S.)
Corporate Contributors:

United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy
Subject/TRT Terms:

[+]

Aircraft Noise Ambient Noise Effective Sound Pressure Helicopter Noise Helicopter Noise Data Helicopters Integrated Noise Model Low Frequency Noise Measurement Of Specific Phenomena Noise Metrics Noise Model Noise Prediction Noise Sources Sound Level
Resource Type:

In Proceedings
Geographical Coverage:

United States
Corporate Publisher:

John A. Volpe National Transportation Systems Center (U.S.)
Abstract:

The Federal Aviation Administration (FAA) aircraft noise modeling tools Aviation Environmental Design Tool (AEDTc) and Integrated Noise Model (INM) do not currently consider noise below 50 Hz in their computations. This paper describes a preliminary study to determine the effect of including low-frequency data on the accuracy of AEDT/INM results. Expanded aircraft noise spectra containing one-third octave band data to 12.5 Hz were analyzed using methods adapted from AEDT/INM. Results from expanded spectral data are compared with results from the historical AEDT/INM spectral data (one-third octave band data from 50 Hz to 10 kHz). This comparison showed a range of differences, from increases in overall un-weighted sound pressure levels (SPL), to negligible changes in A-weighted and Time Audible metrics. These changes may be particularly important for helicopters, with dominant low-frequency rotor noise below 50 Hz. Following the comparison, the potential implementation of expanded spectral data in AEDT is discussed.
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PDF
Collection(s):

Volpe Center
Main Document Checksum:

[+]

urn:sha256:c2b2255391e99fee927acbd991551d57e3a8644dce596d0e5504f1122714e0dc
Download URL:

https://rosap.ntl.bts.gov/view/dot/12004/dot_12004_DS1.pdf
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Examination of the low frequency limit for helicopter noise data in the Federal Aviation Administration's Aviation Environmental Design Tool and Integrated Noise Model

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