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. Author manuscript; available in PMC: 2018 Aug 1.
Published in final edited form as: Hear Res. 2017 Jun 13;351:116–129. doi: 10.1016/j.heares.2017.06.004

Fig. 2.

Fig. 2

Schematic illustrating the modified forward-masking subtraction method used to resolve ECAP responses to each pulse in the pulse train. In all panels, probe pulses are labeled “P” and masker pulses are labeled “M.” MPI is the masker-probe interval. Left: the standard forward- masking technique is applied to obtain the response to the first pulse in the train (AT) and to derive a template of the probe artifact (BT - CT) to be applied to pulses 2–13. AT is the probe alone, BT is the forward-masked condition with the standard MPI of 400 μsec, CT is the masker alone, and DT is a recording of the switching artifact. The masker is set 10 CL above the probe to ensure adequate masking. Middle: the modified forward-masking technique [(BN-CN)-(BT-CT)] is used to resolve the response to the second pulse in the train. In this case, the masker and probe are equal in amplitude and the MPI is equal to the period of the pulse train. Right: the modified forward-masking technique [(BN-CN)-(BT-CT)] is used to resolve the response to pulses 3–13. In BN and CN, the masker and probe amplitudes are equal, and the number of maskers is systematically increased, keeping the MPI equal to the period of the masker pulse train.