Fig. 3. Amplitude of every wave component as a function of impedance. (A—C)
Resistive loads. Superimposed traces from five fish of different lengths (key
in D) were normalised to their respective value in the absence of the object
for each wave component. Note the differences in modulation of the different
waves. Arrows indicate the resistance causing a 50% modulation of the peak of
each wave component. (D—F) Capacitive loads. Superimposed traces from
five fish of different lengths (key in D) were normalised to the open- and
short-circuit respective values for each wave component. Note that the 50%
point occurs at 20 nF for sV1, at 7 nF for sV3 and 2 nF
for sV4. Note also that the curve corresponding to sV4
has a maximum at 10 nF.