Fig. 5.

(A) Schematic spectra of harmonicity test stimuli (Exps. 3 and 4): Thick and thin lines depict spectra of harmonic and inharmonic tones, respectively. See Materials and Methods for details. (B) Beating stimuli (Exps. 3 and 5) were made of two pure tones close in frequency (0.75 or 1.5 semitones apart). They were presented diotically (both tones to both ears), resulting in the perception of beats, or dichotically (one tone to each ear), producing a substantial decrease in perceived beating. (C) Mean and individual preferences for the two groups of listeners. Preference measures, as in ref. 8, were differences in the average ratings for two groups of sounds. Consonance (dyads): mean rating (MR) for the four most consonant dyads minus MR for the four most dissonant dyads; Consonance (triads): MR for the major triad minus MR for the augmented triad; Harmonicity1: MR for the harmonic complexes minus MR for the inharmonic complexes; Harmonicity2: MR for the pure tones minus MR for the dichotic pairs of pure tones; Beating: MR for the dichotic pairs of pure tones minus MR for the diotic pairs of pure tones.