Reply to Comment on ‘On the correct use of stepped-sine excitations for the measurement and identification of time-varying bioimpedance'

摘要

Objective: The authors Lang and Zalka commented on our previous note (Louarroudi and Sanchez 2017 Physiol. Meas. 38 N73–80), indicating interpolation as a suitable method to estimate the instantaneous impedance of a time-varying impedance from stepped-sine excitations. Approach: Here, we briefly delve into the underlying assumptions of the interpolation scheme. Main results: We illustrate the approximation of the instantaneous impedance of a time-varying impedance from stepped-sine measurements conducting experiments on a phantom. Significance: We outline the technical challenges awaiting future research required to validate the accuracy of the instantaneous impedance approximation of a time-varying impedance using stepped-sine excitations.