Download or read book Atmospheric absorption Adjustment Procedure for Aircraft Flyover Noise Measurements written by Alan H. Marsh and published by . This book was released on 1977 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of alternative procedures for atmospheric absorption adjustments during noise certification written by Alan H. Marsh and published by . This book was released on 1980 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental Atmospheric Absorption Values from Aircraft Flyover Noise Signals written by Dwight E. Bishop and published by . This book was released on 1971 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A comparison of two independent measurements and analyses of jet aircraft flyover noise written by Robert N. Hosier and published by . This book was released on 1977 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Recommended Procedures for Measuring Aircraft Noise and Associated Parameters written by and published by . This book was released on 1977 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Statistical Comparisons of Aircraft Flyover Noise Adjustment Procedures for Different Weather Conditions written by Arnold W. Mueller and published by . This book was released on 1979 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book STANDARD VALUES OF ATMOSPHERIC ABSORPTION AS A FUNCTION OF TEMPERATURE AND HUMIDITY FOR USE IN EVALUATING AIRCRAFT FLYOVER NOISE written by A-21 Aircraft Noise Measurement Aviation Emission Modeling and published by . This book was released on 1964 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Technical Paper written by United States. National Aeronautics and Space Administration and published by . This book was released on 1979 with total page 1076 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Technical Paper written by and published by . This book was released on 1979 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Review of Current Procedures for Normalizing Aircraft Flyover Noise Data to Reference Meteorological Conditions written by Richard DeLoach and published by . This book was released on 1977 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Correction Procedures for Aircraft Noise Data written by and published by . This book was released on 1980 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Noise Certification Test and Analysis Procedures written by United States. Federal Aviation Administration and published by . This book was released on 1986 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Alternative Procedures for Atmospheric Absorption Adjustments During Noise Certification Volume III Tables of Atmospheric Absorption Losses written by Alan H. Marsh and published by . This book was released on 1980 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: The work reported here extends that in FAA-RD-77-167, December 1977, to the problem of adjusting actual aircraft noise 1/3-octave-band spectra measured at 0.5-s intervals. Test-day spectra are used to calculate, PNL, PNLT, EPNL, AL, and SEL. The test-day spectrum at the time of PNLTM and at the time of ALM are adjusted to acoustical-reference conditions using the atmospheric-absorption method in American National Standard ANS S1.26-1978 and applied, using measurements of air temperature and relative humidity at various heights above the ground, by integrating over the frequency range of the passband of ideal filters and by calculating the absorption at the exact band center frequencies only. SAE ARP866A is also used with the vertical-profile temperature/humidity data and with data at 10.0 m to determine adjustments from test to reference conditions. The adjustment methods are applied to noise data from 9 aircraft. Volume I describes the analyses and results of the study. Volume II presents the computer program that was developed and illustrates its use with a test case. Volume III presents tables of attenuation due to atmospheric absorption over a 300-m path. Attenuatons were calculated using ANS S1.26-1978 for pure tones at band center frequencies and for 3 noise spectral slopes by a band-integration method, and using SAE ARP866A. For each of the 5 methods, the tables cover 34 air temperatures from 2 to 35C, 10 relative humidities from 10 to 100 percent, and 24 nominal band center frequencies from 50 to 10,000 Hz. (Author).
Download or read book Evaluation of Alternative Procedures for Atmospheric Absorption Adjustments During Noise Certification Volume I Analyses and Results written by and published by . This book was released on 1980 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: The work reported here extends that in FAA-RD-77-167, December 1977 to the problem of adjusting actual aircraft noise 1/3-octave-band spectra measured at 0.5-s intervals. Test-day spectra are used to calculate PNL, PNLT, EPNL, AL, and SEL. The test-day spectrum at the time of PNLTM and at the time of ALM are adjusted to acoustical-reference conditions using the atmospheric- absorption method in American National Standard ANSI S1.26-1978 and applied, using measurements of air temperature and relative humidity at various heights above the ground, by integrating over the frequency range of the passband of ideal filters and by calculating the absorption at the exact band-center frequencies only. SAE ARP866A is also used with the vertical-profile temperature/humidity data and with data at 10 m to determine adjustments from test-to-reference conditions. The adjustment methods are applied to noise data from nine aircraft. Volume I describes the analyses and results of the study. Volume II presents the computer program that was developed and illustrates its use with a test case. Volume III presents tables of attenuation due to atmospheric absorption over a 300-m path. Attenuations were calculated using ANSI S1.26-1978 for pure tones at band-center frequencies and for three noise spectral slopes by a band-integration method, and using SAE ARP866A. For each of the five methods, the tables cover 34 air temperatures from 2 to 35 C, 10 relative humidities from 10 to 100 percent, and 24 nominal band-center frequencies from 50 to 10,000 Hz. (Author).
Download or read book Noise Certification Handbook written by United States. Federal Aviation Administration and published by . This book was released on 1988 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Correction Procedures for Aircraft Noise Data written by and published by . This book was released on 1980 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1990 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
