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. 2011 Apr 13;73(5):1562–1578. doi: 10.3758/s13414-011-0097-7

Fig. 8.

Fig. 8

An amplifier with a negative feedback loop. Power at the output of the signal is used to modulate the gain on the amplifier. As the power at the output increases, the amplifier’s gain is reduced. The amount of compression is governed by the value of q, which is assumed to be under top-down control (see the text)