The impulse must be short for comfort. If we
reduce our theory to the rectangular impulses, that is true. But this conclusion
is false in the majority of cases
Let us take an example:
We superimposed two impulses, the first
rectangular one of 500 µs, peak amplitude 5,44 mA and the second hemi sinusoidal
of 1 000 µs, peak amplitude 5,77 mA. These intensities were sought,
by simulation, to obtain the response of a sensitive fibre (300 µs of chronaxy).
Is it more comfortable to support 5,44 mA
rectangular impulse or to undergo, for the same effects, the sinusoidal impulse
of 5,77 mA.
Those which understood, will have
preferred the second.
The short duration of an impulse is not a
sufficient criterion to qualify the comfort of a signal.
