| Title | Helicopter noise measurements repeatability program final report |
|---|---|
| Record ID | 47879 |
| Personal Name Creator |
Newman, J. Steven; Locke, Maryalice |
| Source | 251p. in various pagings |
| Corporate Creator | United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy |
| Publisher | United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy |
| Publication Date | 19870900 |
| Language | English |
| Abstract | This report summarizes the findings of the Helicopter Noise Measurement Repeatability Program (HNMRP), which was initiated by the International Civil Aviation Organization (ICAO) Committee on Aviation Environmental Protection (CAEP) Working Group II (WGII). The HNMRP was begun with the goal of further developing and refining international helicopter noise certification standards. This international effort has involved the active participation of Austrailia, Canada, the Federal Republic of Germany, France, Italy, Japan, the United Kingdom, and the United States. The participating ICAO CAEP WG II nations set out to investigate the degree of variability in test results of the existent helicopter noise certification rule by conducting a multinational noise measurement flight test program using a single, widely available helicopter, the Bell 206L-1 (or the acoustically equivalent 206L-3). The HNRMP has provided a large number of certificating authoritites and industry participants the opportunity to acquire experience in helicopter noise certification and the opportunity to thoroughly test and review the requiremtns of Charpet 8 and Appendix 4 of ICAO Annex 16 through implementation experience. As a result of this experience, recommendations for improvements and refinements to Annex 16 were developed, and subsequently adopted as proposed amendents at the CAEP/1 meeting in Montreal in June 1986. The HNMRP also provided ICAO WG II the chance to review the inherent repeatability of noise levels for a single helicopter model tested by differenct teams at different locations. This report contains: a history of the HNMRP, a summary of the multi-nation comparison data, and discussion of the results of the program, including the refinements proposed for the international helicopter noise certification standard. Future analytical opportunities using HNMRP data are also discussed at the end of the report. |
| Rosap ID | dot:10022 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/10022 |
| TRT Terms | Helicopters; Flight tests; Aircraft noise; Measurement; Standards; Standardization; Certification; Sound level; Test procedures |
| General Subjects | Noise repeatability; Noise certification; Noise measurement; International noise standards |
| Classification | AGR - IMPACTS - IMPACTS; NTL - AVIATION - Aviation Energy and Environment |
| Geographical Coverage |
Australia; Japan; Canada; United States; Federal Republic of Germany; France; Italy; United Kingdom |
| TRIS Online Accession No |
445728 |
| Report Number | FAA-EE-87-2 |
| Availability | Volpe National Transportation Systems Center, Technical Reference Center |
| Resource type | Tech Report |
| URL | https://ntlrepository.blob.core.windows.net/lib/47000/47800/47879/Repeatability.pdf |
| Format | |
| Database | NTL Digital Repository |