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Left: Perceived loudness of acoustic stimuli as measured by psychoacoustic loudness scaling. Percent signal change from baseline of those voxels in AB (middle) and PAC (right), for which the underlying BOLD‐signal as a function of bandwidth had a significant linear (AB and PAC) or nonlinear (quadratic, PAC) component. Note that the response in the auditory cortex reflects the perceived loudness to a larger extent than the response in the brainstem does.
