Just-noticeable frequency shifts map to constant basilar distances

Evidence

The frequency shift, ilf, which corresponds to a change of 0.2 min of the place of maximal stimulation along the basilar membrane, is about 4 times larger than 2ilf but a factor of 6.3 times smaller than the width of the critical band. This means that a frequency shift of a sinusoidal tone by 2ilf produces a shift of constant distance along the basilar membrane of about 0.05 mm. The shift is independent of the frequency of the tone and constant along the basilar membrane (the small difference between frequency and frequency pitch as described in Sect. — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 929

Categorization

• XREF: Constant physical displacement for a just-noticeable difference strongly parallels Weber’s law and place-coding tonotopy in the cochlea. — connects to: Basilar membrane stiffness gradients create a frequency-to-place mapping; Frequency discrimination depends on basilar membrane displacement separation — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 573; Auditory sensitivity varies nonuniformly across the frequency range — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 648 (+4 more)
• SEED: A candidate essay angle: the ear’s resolution is uniform in place, not in frequency — a counterintuitive ‘every note gets equal room’ framing.
• corroborated: 2 independent passages support this claim — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 929

Broader Connections

• Frequency discrimination depends on basilar membrane displacement separation #expands (0.80) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 573
• Basilar membrane stiffness gradients create a frequency-to-place mapping #expands (0.75)
• Auditory sensitivity varies nonuniformly across the frequency range #expands (0.70) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 648
• Tonotopic frequency ordering persists from cochlea to auditory cortex #expands (0.70)