aftereffects of auditory adaptation
The most well known sensory after effect illusion in the auditory system is probably the Zwicker tone (Zwicker, 1964).


  If a white noise with a half‐octave‐band suppression placed anywhere from 300 to 7000 Hz is presented at an over‐all sound‐pressure level of about 60 dB for 1 min and then switched off, a decaying, poststimulatory sound similar to a pure tone is heard for about 10 sec. The pitch of the post‐stimulatory tone corresponds to a frequency within the suppressed band.


Norena and Eggermont (2003) argue that compared to non Zwicker tone stimuli, Zwicker tone stimuli give rise to an increased firing rate and an increase in the between neuron correlation of spike trains (I think) in the primary auditory cortex.