Helmholtz’s nineteenth-century timbre rules anticipate the modern critical bandwidth and tristimulus analyses

Evidence

These general rules provide a basis for considering changes in timbre with respect to sound spectra, which link directly with today’s understanding of the nature of the critical bandwidth. His second and fourth general rules make a clear distinction between sounds in which partials higher than the sixth or seventh are distinct or not, and his first rule gives a particular importance to the f0 component. It is worth noting the similarity with the axes of the tristimulus diagram as well as axis (I) resulting from Grey’s multidimensional experiment. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1497

Categorization

• XREF: Connects Helmholtz’s foundation to my psychoacoustics reading list which already includes critical bands, tristimulus diagram, and Grey’s multidimensional scaling — useful as a single lineage thread.
• SEED: A possible essay on how a Victorian scientist’s listening-based taxonomy still maps onto modern spectral measures of timbre.