Mathematic--History, Signal processing, Sound--Measurement
This document contains drafts of Richard C. Heyser's article, which he intended to publish in AUIDO magazine. Heyser chronicles the history and perceptions of Group Delay, which he calls "The Great Pretender."
Heyser, Richard C. "The Great Pretender" (1979). Richard C. Heyser Collection, College Archives & Special Collections, Columbia College Chicago. http://digitalcommons.colum.edu/cadc_heyser_unpublished/26
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