Figure 5

Numbers of APs triggered per response for a range of pressure amplitudes (2.5; 4.0; 5.2; 6.6; 7.1; 7.3 MPa). Each black triangle represents a stimulus, including those which did not trigger any nervous response. Each chart (A–F) corresponds to a different number of cycles per pulse (175; 350; 525; 800; 975; 1150). The white-grey boundaries indicate the threshold under which no nervous response could be triggered. All sequences shared the same harmonic frequency (f = 1.1 MHz) and number of pulses (Npulses = 20).