Cochlear implant testing used four pulse shapes favoring either cathodic or anodic stimulation

Evidence

The four pulse shapes illustrated in Fig. 1 were tested, including symmetric biphasic (SYM), reversed pseudomonophasic (RPS), reversed pseudomonophasic with an interphase gap of 6.5 ms (RPS-IPG) and triphasic (TRI) pulses. The top pulse shapes are assumed to favor cathodic stimulation, hence the “C” at the end of their acronyms while the bottom pulse shapes are assumed to favor anodic stimulation, hence the “A”. — Dijk, Pim van, Physiology, Psychoacoustics and…, 2279