Averaged normalized STRFs (each STRF is normalized on its own maximum) in multi-peaked neurons (first and second rows) and single-peaked neurons (third and fourth rows) derived from MUA (first and third rows) and LFPs (second and fourth rows), obtained from single-tone stimulation (first column, 65 dB SPL; second column, 35–15 dB SPL), moderate-density multi-tone stimulation (20 stimuli/s; third column, 65 dB SPL), and high-density multi-tone stimulation (120 stimuli/s; fourth row, 65 dB SPL).