| Burley, C. L., Brooks, T. F., Charles, B. D., and McCluer, M., "Tiltrotor Aeroacoustic Code (TRAC) Prediction Assessment and Initial Comparisons with TRAM Test Data," 25th European Rotorcraft Forum (1999), Rome, Italy, 14 - 16 September, 1999. NTRS |
| Dunn, M. H., Tweed, J., and Farassat, F., "The Application nof a Boundary Integral Equation Method to the Prediction of Ducted Fan Engine Noise," Journal of Sound and Vibration, Vol. 227, No. 5, pp. 1019 - 1048, November, 1999. DOI NTRS |
| Farassat, F., and Dunn, M. H., "A Simple Derivation of the Acoustic Boundary Condition in the Presence of Flow," Journal of Sound and Vibration, Vol. 224, No. 2, pp. 384 - 386, July, 1999. DOI NTRS |
| Farassat, F., and Farris, M., "Acoustic energy estimates in inhomogeneous moving media," The Journal of the Acoustical Society of America, Vol. 105, No. 2 (Supplement), pp. 1142, February, 1999. DOI |
| Farassat, F., and Farris, M., "The Mean Curvature of the Influence Surface of Wave Equation with Sources on a Moving Surface," Mathematical Methods in the Applied Sciences, Vol. 22, No. 17, pp. 1485 - 1503, November, 1999. DOI NTRS |
| Farassat, F., and Farris, M., "Verification and Analysis of Formulation 4 of Langley for the Study of Noise From High Speed Surfaces," AIAA Paper 99-1881, 5th AIAA/CEAS Aeroacoustics Conference, Bellevue, Washington, 10 - 12 May, 1999. DOI NTRS |
| Santa Maria, O. L., "Two-Dimensional Fourier Transform Applied to Helicopter Flyover Noise," NASA/TM-1999-209114, March, 1999. NTRS |
| Santa Maria, O. L., Farassat, F., and Morris, P. J., "Two-Dimensional Fourier Transform Analysis of Helicopter Flyover Noise," AHS 55th Annual Forum, Montreal, Quebec, 25 - 27 May, 1999. NTRS |
| Thomas, R. H., Farassat, F., Clark, L. R., Gerhold, C. H., Kelly, J. J., and Becker, L. E., "A Mode Detection Method Using the Azimuthal Directivity of a Turbofan Model," AIAA Paper 99 - 1954, 5th AIAA/CEAS Aeroacoustics Conference, Bellevue, Washington, 10 - 12 May, 1999. DOI NTRS |