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. 2022 Jul 22;16:915302. doi: 10.3389/fnins.2022.915302

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Copyright © 2022 Walia, Shew, Lefler, Kallogjeri, Wick, Holden, Durakovic, Ortmann, Herzog and Buchman.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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ECochG recording (difference curves) using the most apical electrode at the start of the insertion and at the end of insertion. Stimulus parameters were sequential, alternating phase presentations of 250- and 500-Hz tone bursts, with a single repetition per phase. Fast Fourier transformations are also shown. The noise floor was measured with the sound tube clamped. The signal-to-noise ratio (SNR) for 250-Hz was larger than 500-Hz at the start of the insertion but was similar at the end of insertion. (A) 250-Hz stimulus at the start of insertion. (B) 500-Hz stimulus at the start of insertion. (C) 250-Hz stimulus at the end of insertion. (D) 500-Hz stimulus at the end of insertion.