Comparison of Two Waveguide Methods for Educing Liner Impedance in Grazing Flow

AIAA Journal

Volumn 42, Issue 2, 2004, Pages 232-240

  Jones, M G ^a,b   Watson, W R ^a,c   Tracy, M B ^a,d   Parrott, T L ^a,b  

^a NASA LANGLEY RESEARCH CENTER   (United States)

^b Structural Acoustics Branch   (United States)

^c NONE   (United States)

^d Aeroacoustics Branch   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ACCELEROMETERS; ACOUSTIC PROPERTIES; BANDWIDTH; COMPUTER AIDED ANALYSIS; DATA PROCESSING; FINITE ELEMENT METHOD; SIGNAL TO NOISE RATIO;

ACOUSTIC WAVEGUIDE METHODS; EDUCING LINER IMPEDANCE; GRAZING FLOW; SINGLE MODE METHHOD (SMM); SOUND PRESSURE;

WAVEGUIDES;

EID: 1542501726     PISSN: 00011452     EISSN: None     Source Type: Journal    
DOI: 10.2514/1.9092     Document Type: Article

References (16)

1. Phillips, B., "Effects of High Wave Amplitude and Mean Flow on a Helmholtz Resonator," NASA TMX-1582, May 1968.
2. Dean, P. D., "An In Situ Method of Wall Acoustic Impedance Measurement in Flow Ducts," Journal of Sound and Vibration, Vol. 34, No. 1, 1974, pp. 97-130.
3. Malmary, C., Carbonne, S., Auregan, Y., and Pagneux, V., "Acoustic Impedance Measurement with Grazing Flow," AIAA Paper 2001-2193, May 2001.
4. Feder, E., and Dean, L. W., III, "Analytical and Experimental Studies for Predicting Noise Attenuation in Acoustically Treated Ducts for Turbofan Engines," NASA CR-1373, Sept. 1969.
5. Armstrong, D. L., "Acoustic Grazing Flow Impedance Using Waveguide Principles," NASA CR-120848, Dec. 1971.
6. Eversman, W., Nelsen, M. D., Armstrong, D., and Hall, O. J., Jr., "Theoretical and Experimental Analysis of Acoustic Linings for Ducts with Flow," AIAA Paper 71-731, June 1971.
7. Tester, B. J., "The Propagation and Attenuation of Sound in Lined Ducts Containing Uniform or Plug Flow," Journal of Sound and Vibration, Vol. 28, No. 2, 1973, pp. 151-203.
8. Tester, B. J., "Acoustic Energy Flow in Lined Ducts Containing Uniform or Plug Flow," Journal of Sound and Vibration, Vol. 28, No. 2, 1973, pp. 205-215.
9. Watson, W. R., Tanner, S. E., and Parrott, T. L., "Optimization Method for Educing Variable-Impedance Liner Properties," AIAA Journal, Vol. 36, No. 1, 1998, pp. 18-23.
10. Watson, W. R., Jones, M. G., and Parrott, T. L., "Validation of an Impedance Eduction Method in Flow," AIAA Journal, Vol. 37, No. 7, 1999, pp. 818-824.
11. Parrott, T. L., and Jones, M. G., "Parallel-Element Liner Impedances for Improved Absorption of Broadband Sound in Ducts," Noise Control Engineering Journal, Vol. 43, No. 6, 1995, pp. 183-195.
12. "Standard Test Method for Impedance and Absorption of Acoustical Materials Using a Tube, Two Microphones, and a Digital Frequency Analysis System," Annual Book of ASTM Standards, ASTM E1050-98, American Society for Testing and Materials, West Conshohocken, PA, 2000.
13. Schroeder, M. R., "Binaural Dissimilarity and Optimum Ceilings for Concert Halls: More Lateral Sound Diffusion," Journal of the Acoustical Society of America, Vol. 65, No. 4, 1979, pp. 958-963.
14. Jones, M. G., and Stiede, P. E., "Comparison of Methods for Determining Specific Acoustic Impedance," Journal of the Acoustical Society of America, Vol. 101, No. 5, 1997, pp. 2694-2704.
15. Jones, M. G., "A Comparison of Signal Enhancement Methods for Extracting Tonal Acoustic Signals," NASA TM-1998-208426, May 1998.
16. Ju, H. B., and Fung, K. Y., "Time-Domain Impedance Boundary Conditions with Mean Flow Effects," AIAA Paper 2000-2003, June 2000.