Tones with lower partials up to the sixth sound rich yet sweet
Evidence
If only the unevenly numbered partials are present (as in narrow stopped organ pipes, pianoforte strings struck in their middle points and clarinets), the quality of the tone is hollow, and, when a large number of such partials are present, nasal. When the prime tone predominates, the quality of the tone is rich; but when the prime tone is not sufficiently superior in strength to the upper partials, the quality of tone is poor.
— David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1495 (#expands, via linked claim)
Categorization
XREF: connects to: Distinct high partials make tones sound cutting or rough and powerful — David Howard, Jamie Angus, coustics and Psychoacoustics, 1520; Rich complex tones can contain internally dissonant partials without sounding dissonant; Suppressing dissonant 7th and 11th partials does not measurably improve tone quality (+1 more)