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Some acoustic results from the Pratt and Whitney Advanced Ducted Propulsor [microform] : Fan 1 / James H. Dittmar and David M. Elliott, Lawrence A. Bock (NASA/TM ; 1999-209049)

Some acoustic results from the Pratt and Whitney Advanced Ducted Propulsor [microform] : Fan 1 / James H. Dittmar and David M. Elliott, Lawrence A. Bock (NASA/TM ; 1999-209049)
Microform図書
1999<YCA-NAS 1.15:209049>
National Diet Library
  • Subject HeadingNoise measurement Engine design Noise reduction Nacelles Effective perceived noise levels Ducts

Comparison of the performance of noise metrics as predictors of the annoyance of stage II and stage III aircraft overflights [microform] / Karl S. Pearsons ... [et al.] (NASA contractor report ; 198348)

Comparison of the performance of noise metrics as predictors of the annoyance of stage II and stage III aircraft overflights [microform] / Karl S. Pearsons ... [et al.] (NASA contractor report ; 198348)
Microform図書
1996<YCA-NAS 1.26:198348>
National Diet Library
  • Subject HeadingAircraft noise Anechoic chambers Judgments Effective perceived noise levels Physiological effects

Benefits of swept and leaned stators for fan noise reduction [microform] / Richard P. Woodward ... [et al.] (NASA/TM ; 1998-208661)

Benefits of swept and leaned stators for fan noise reduction [microform] / Richard P. Woodward ... [et al.] (NASA/TM ; 1998-208661)
Microform図書
1998<YCA-NAS 1.15:208661>
National Diet Library
  • Subject Heading...e Sweep effect Effective perceived noise levels Fans

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