Jet noise source location via nearfield-farfield correlations
Ian R. McLean, Werner G. Richarz · The Journal of the Acoustical Society of America · 1980
Many source locating schemes require a considerable investment of hardware and software. The method due to Fisher et al. [M.J. Fisher, M. Harper-Bourne, and S. A. L. Glegg, J. Sound Vib. 51, 1 (1977)] appears to be the most readily implemented. The present procedure is an “economy” version of the former approach: time delays between signal reception by several observers are used in a generalized triangulation algorithm to yield estimates of virtual source positions of jet noise. The delays are measured by means of cross correlations of narrowband near- and farfield microphone signals. Source distributions computed therefrom are compatible with those derived from more elaborate source locating techniques. The method is well suited for a “quick-look” analysis [Work supported by NSERC, Canada.]