Physiological recordings of a type 2 phasic acoustic afferent. A, Response to synthetic cricket song (50 pps, 4 kHz, 50% duty cycle, 95 dB SPL). Calibration: 2 mV, 10 msec. B, Phasic response to a 100 msec sound pulse at the BF of the cell, 5 kHz at 85 dB SPL. C, Raster and PST histogram of a type 2 afferent in response to the repetition of the 100 msec stimulus at 1 Hz. Four distinct clusters of spikes are seen in the response to this 100 msec sound pulse (bin width, 20 μsec).