Fig. 1.

A, Scheme of a fixed pressure threshold model. Continuous lines represent the onset envelopes of three signals, all shaped with cosine-squared rise functions, but differing in plateau pressure and rise time. A fixed pressure threshold (horizontal dashed line) is reached at times (vertical dashed lines) that depend on signal level for a fixed rise time and on rise time for a fixed level.B, For one AN fiber of low spontaneous rate, first-spike latency is plotted against SPL with rise time as the parameter (seekey). Note the decrease of latency with increasing SPL and with decreasing rise time.