Abstract
The data reduction capabilities of our nearfield acoustic holography (NAH) system have been greatly enhanced through the development of efficient computer algorithms utilizing an array processor with a minicomputer. The array processor accelerates not only the FFT computation, but also the Green's function calculation, data windowing, graphics display generation, and zoom imaging. In this paper, the various techniques, which have reduced the NAH processing time by a factor of ∼ 20, will be discussed. This new processing system speeds data collection and processing and will permit measurement of radiation from wideband noise sources with a large number of frequency components. [Work supported by ONR and NASA.]
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