Click-response latency in NM is level- and BF-dependent. A, PSTHs obtained at four different levels of click stimuli from an extracellularly recorded single NM unit. Each PSTH is a summary of responses to many clicks. At the top of each panel, we show two voltage traces from example trials with spike times marked by vertical bars, indicating the low number of spikes in each single trial and the high variability across trials, as expected (Köppl, 1997a; Fontaine et al., 2015). Bin width: 50 μs. The arrow-heads mark the click-response latency at each level. B, Click-response latency decreased with increasing stimulus level and with increasing BF. The examples in A are marked with filled diamonds. Dashed line: −19 ± 3 μs/dB · level + 3.3 ± 0.2 ms (the GLM for the mean BF =5.58 kHz). 32 NM units, with 1–4 stimulus levels each, resulting in N = 91 click-response latencies.