Comparison of two acoustic waveguide methods for determining liner impedance

7th AIAA/CEAS Aeroacoustics Conference and Exhibit

Volumn , Issue , 2001, Pages

  Jones, Michael G ^a   Watson, Willie R ^a   Tracy, Maureen B ^a   Parrott, Tony L ^a  

^a NASA LANGLEY RESEARCH CENTER   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ACOUSTIC MEASUREMENTS; ACOUSTIC PRESSURES; ACOUSTIC WAVEGUIDES; IMPEDANCE EDUCTION; MEAN FLOW VELOCITIES; RELATIVE ACCURACY; SOUND PRESSURE LEVEL; UNIFORM MEAN FLOW;

ACOUSTIC VARIABLES MEASUREMENT; AEROACOUSTICS; CERAMIC MATERIALS; DECAY (ORGANIC); FINITE ELEMENT METHOD; PRESSURE; TUBES (COMPONENTS);

WAVEGUIDES;

EID: 84896691909     PISSN: None     EISSN: None     Source Type: Conference Proceeding    
DOI: None     Document Type: Conference Paper

References (8)

1. Phillips, B., Effects of High Value Wave Amplitude and Mean Flow on a Helmholtz Resonator, NASA TMX-1582, 1967.
2. Armstrong, D.L., Beckemeyer, R.J. and Olsen, R.F., Impedance Measurements of Acoustic Duct Liners With Grazing Flow, Paper presented at the 87th Meeting of the Acoustical Society of America, New York, NY, 1974.
3. 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.
4. Parrott, T.L. and Jones, M.G., Parallel-Element Liner Impedances for Improved Absorption of Broadband Sound in Ducts, Noise Control Engineering Journal, 1995.
5. Schroeder, M.R., Binaural Dissimilarity and Optimum Ceilings for Concert Halls: More Lateral Sound Diffusion, Journal of Acoustical Society of America Vol. 65, No. 4, 1979.
6. "Standard Test Method for Impedance and Absorption of Acoustical Materials Using a Tube, Two Microphones, and a Digital Frequency Analysis System, ASTM E1050-90, 1990.
7. Jones, M.G. and Stiede, P.E., Comparison of Methods for Determining Specific Acoustic Impedance, Journal of Acoustical Society of America, Vol. 101, No. 5, 1997.
8. Ju, H.B. and Fung, K.-Y., Time-Domain Impedance Boundary Conditions with Mean Flow Effects," AIAA-2000-2003, 2000.