Fig. 1.

Typical ABR waveforms measured from a rat before and after noise exposure. ABR waveforms in response to 30 kHz tone pips (numbers indicate the attenuation of the tone) before (dashed grey line) and after (filled black line) the complete noise exposure protocol. Following the noise exposure protocol, a decrease in waveform amplitude can be seen at all tone pip attenuations compared to the pre-noise exposure ABR waveforms while no dramatic change in waveform component latencies were observed. Additionally, the ABR waveform could not be reliably identified at 40 dB attenuation following noise exposure.