Loudness growth is linear up to 80 dB then steepens near 90 dB

Evidence

All three curves are characterized by a nearly linear growth of categorical loudness with sound intensity between 20 and 80 dB SPL and an increase in the steepness of the slope around 90 dB SPL. There was virtually no difference in perceived loudness between left and right ear of entry. — Dijk, Pim van, Physiology, Psychoacoustics and…, 2625

Categorization

• DEFINE: Establishes the behavioral baseline against which the fMRI activity is interpreted.
• corroborated: 2 independent passages support this claim — Dijk, Pim van, Physiology, Psychoacoustics and…, 2625