Event-related potentials (ERPs) elicited by transient and periodic auditory stimulation at different stimulus intensities (I1–I3).

<p>Waveforms (recorded at electrode Fz) obtained following both transient and periodic auditory stimulation at stimulus intensities of I1, I2, and I3 are shown in black, yellow, and cyan respectively. Amplitudes of late latency responses (LLRs, for S1, S2, and S3) and SSRs (40-Hz for S2 and 60-Hz for S3) were significantly different across different stimulus intensities (I1–I3; P<0.05 for all comparisons), while amplitudes of middle latency responses (MLRs, between 35 and 45 Hz and between 55 and 65 Hz for S1) were not significantly different across different stimulus intensities (I1–I3; P>0.05 for both comparisons).