A comparison of two independent measurements and analyses of jet aircraft flyover noise
Author: Robert N. Hosier
Publisher:
Published: 1977
Total Pages: 84
ISBN-13:
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Author: Robert N. Hosier
Publisher:
Published: 1977
Total Pages: 84
ISBN-13:
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Publisher:
Published: 1982
Total Pages: 310
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Publisher:
Published: 1992
Total Pages: 288
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DOWNLOAD EBOOKAuthor: J. Boettcher
Publisher:
Published: 1992
Total Pages: 12
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DOWNLOAD EBOOKFlyover noise measurements are evaluated for four different military jet aircraft types flying at low altitudes. Flight Mach numbers ranged from 0.5 to 0.9. The analysis shows that noise immission is caused by jet mixing and broadband shock associated noise. Based on the experimental results existing noise prediction schemes are extended toward higher subsonic flight Mach numbers. The novel prediction schemes describe the observed acoustic signatures quite accurately. This holds for the overall sound pressure level in dependence of the emission angle, for sound-pressure level time histories and for one-third-octave spectra.
Author: United States. Superintendent of Documents
Publisher:
Published: 1978
Total Pages: 1228
ISBN-13:
DOWNLOAD EBOOKFebruary issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index
Author: J. F. Wilby
Publisher:
Published: 1984
Total Pages: 137
ISBN-13:
DOWNLOAD EBOOKThe Federal Aviation Administration is currently reviewing noise certification procedures for general aviation propeller-driven aircraft. As part of this review noise measurements were made for take-offs and flyovers of several propeller-driven aircraft at Dulles International Airport. The data from the tests were analyzed by FAA in terms of the A-weighted sound level. This analysis indicated that there were general differences between take-off and flyover sound levels. The intent of this report is to present a review of the data without going into detailed analyses. Possible reasons for differences between take-off and flyover sound levels are explored and certain conclusions drawn. Recommendations are then made for future work in order to provide a more-detailed understanding of the physical phenomena involved.
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Published:
Total Pages: 1228
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Publisher:
Published: 1978
Total Pages: 1062
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DOWNLOAD EBOOKSections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
Author:
Publisher:
Published: 1980
Total Pages: 110
ISBN-13:
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