| Title | Examination of the low frequency limit for helicopter noise data in the Federal Aviation Administration's Aviation Environmental Design Tool and Integrated Noise Model |
|---|---|
| Record ID | 51026 |
| Personal Name Creator |
Boeker, Eric R.; Schulz, Noah E. |
| Source | 12p. in various pagings; Noise-Con 2010, Baltimore, MD, April 19-21, 2010 |
| Corporate Creator | John A. Volpe National Transportation Systems Center (U.S.) |
| Corporate Contributor |
United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy |
| Publisher | John A. Volpe National Transportation Systems Center (U.S.) |
| Publication Date | 20100419 |
| Language | English |
| 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. |
| Rosap ID | dot:12004 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/12004 |
| TRT Terms | Helicopters; Aircraft noise; Noise sources; Ambient noise; Sound level; Measurement of specific phenomena; Effective sound pressure |
| General Subjects | Noise prediction; Noise model; Helicopter noise; Integrated Noise Model; Helicopter noise data; Noise metrics; Low frequency noise |
| Classification | NTL - AVIATION - AVIATION; NTL - AVIATION - Aviation Energy and Environment; NTL - ENERGY AND ENVIRONMENT - Aviation Energy and Environment; NTL - ENERGY AND ENVIRONMENT - ENERGY AND ENVIRONMENT |
| Geographical Coverage |
United States |
| TRIS Online Accession No |
1518854 |
| Availability | Volpe National Transportation Systems Center, Technical Reference Center |
| Resource type | In Proceedings |
| URL | https://ntlrepository.blob.core.windows.net/lib/51000/51000/51026/Heli_LFN-NC10_010814.pdf |
| Format | |
| Database | NTL Digital Repository |