1. A system for measuring evoked compound action potential (eCAP) artifact, the system comprising: an electrical-equivalent model, wherein in the model includes an ideal current source; and means for recording; wherein the electrical-equivalent model is configured to simulate a biphasic current pulse from the current source, and wherein the current source is left as an open circuit after the end of the biphasic current pulse, and wherein the means for recording measures the eCAP artifact after a response time.