Absolute frequency discrimination worsens as reference frequency increases

Evidence

Increasing FDL with frequency. Most strikingly, the FDL increased as the frequency of the reference tone increased. Thus, in absolute frequency, it was more difficult for the listeners to discriminate between pure tones of different frequencies when the frequency was high. — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 1261

Categorization

• XREF: Contrasts with the intuition that all frequencies are equally resolvable; dovetails with cochlear place-coding models.