A comparison of two independent measurements and analyses of jet aircraft flyover noise
National Aeronautics and Space Administration, 1977 - Transportation - 70 pages
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DATA ACQUISITION PROCEDURES
RESULTS AND DISCUSSION
2 other sections not shown
ac ac ac LU acoustic data acoustic descriptors airplane Analysis Procedures atmospheric absorption correction atmospheric correction CM CM computed controlled flyovers corrected descriptors corrected PNLTM spectra cutback and take-off difference EPNdB Federal Aviation Regulations flap landing approach FLYOVER NOISE LEVELS Group A)ay group B calibrations group B data group B PNL landing approach correction Langley Research Center LU _ LU a ac LU ac LU LU LU Q LU UJ LU Z LU magnetic tape measured and corrected microphone NASA O O CM pistonphone PNdB PNL values PNLT PNLTM spectrum preamplifier preemphasis Q LU Refan sound pressure level Source Noise Measurements speed correction table XII take-off with cutback thrust correction tone band Tone correction U.S. Customary Units UJ LU UNCONTROLLED SOURCE variable-gain amplifier windscreen