Quantification of changes to song following deafening.

(A) Spectrograms from before (Pre), two weeks, and six weeks post deafening for three zebra finches demonstrate typical disruption to the spectral content of song due to deafening. (B) Song DKL values for post deafening songs relative to baseline reference songs for nine birds at two, four, six, and eight weeks following deafening. Song DKL values indicated by ‘Pre’ were calculated by separating the baseline reference data into two groups and comparing one group to the second group. Colors indicate bird identity, with green, yellow and blue in panels A and B illustrating data from birds that had small, intermediate and large changes to song spectral structure following deafening.