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The amount of SPS observed as a function of stimulus bandwidth, for the entire population of 37 cells. Light gray curves show sigmoid fits for individual cells (n = 37), heavy dashed curve represents a composite %SPS curve calculated by fitting the entire data set (n = 420 samples) with a single sigmoid; the intersection of the horizontal and vertical heavy lines indicates the 50% maximum suppression level (27%SPS) at 3.1 kHz.
