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Fig. 4. Temporary threshold shift (TTS) as a function of sound pressure differences (SPD) between the noise exposure sound pressure level (SPL) and goldfish baseline auditory threshold SPL. This relationship is shown at (A) different frequencies tested and (B) different noise SPL used. Colored lines in A represent separate linear regressions for each frequency tested, while in B they represent separate linear regressions for each of the four SPLs (130, 140, 160 or 170 dB re1 µPa) at all frequencies tested. Each data point is the mean TTS for a particular frequency (N=6 fish). The same data points are plotted in A and B, but the individual data points are not shown in A for clarity.





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