Electric resistance, Energy level densities, Reactance (Electricity)
Rather than explaining the meanings behind the phases of sound measurement, Richard C. Heyser explains the relationships between these phases, which he calls the Pattern of Twos.
Heyser, Richard C. "The Pattern of Twos" (1980). Richard C. Heyser Collection, College Archives & Special Collections, Columbia College Chicago. http://digitalcommons.colum.edu/cadc_heyser_unpublished/42
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