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Article

Free-Field Evoked Auditory Brainstem Responses in Cochlear Implant Users

by
Erik Schebsdat
1,
Manuel C. Kohl
1,
Farah I. Corona-Strauss
1,2,
Harald Seidler
3 and
Daniel J. Strauss
1,2,*
1
Systems Neuroscience & Neurotechnology Unit, Saarland University, Faculty of Medicine, Homburg/Saar and Saarland University of Applied Sciences, Saarbruecken, Germany
2
Key Numerics GmbH, Saarbruecken, Germany
3
MediClin Bosenberg Kliniken, St. Wendel, Germany
*
Author to whom correspondence should be addressed.
Audiol. Res. 2018, 8(2), 216; https://doi.org/10.4081/audiores.2018.216
Submission received: 5 September 2018 / Revised: 5 September 2018 / Accepted: 31 October 2018 / Published: 7 December 2018

Abstract

The importance of binaural cues in auditory stream formation and sound source segregation is widely accepted. When treating one ear with a cochlear implant (CI) the peripheral auditory system gets partially replaced and processing delays get added potentially, thus important interaural time differences get altered. However, these effects are not fully understood, leaving a lack of systematic binaural fitting strategies with respect to an optimal binaural fusion. To get new insights into such alterations, we suggest a novel method of free-field auditory brainstem evoked responses (ABRs) analysis in CI users. This method does not bypass the technically induced intrinsic delays of the sound processor while leaving the whole electrode array active, thus the most natural way of stimulation is provided. We compared the ABRs collected of 12 CI users and 12 normal hearing listeners using two different stimuli (chirp, click) at four different intensities each. We analyzed the ABRs using the average of 2000 trials as well as a single trial analysis and found consistent results in the ABRs’ amplitudes and latencies, as well as in single trial relationships between both groups. This method provides a new perspective into the natural CI users’ ABRs and can be useful in future research regarding binaural interaction and fusion.
Keywords: Cochlear Implants; Sensorineural Hearing Loss; Neurology; Auditory Brainstem Response; Interaural-Time-Difference Cochlear Implants; Sensorineural Hearing Loss; Neurology; Auditory Brainstem Response; Interaural-Time-Difference

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MDPI and ACS Style

Schebsdat, E.; Kohl, M.C.; Corona-Strauss, F.I.; Seidler, H.; Strauss, D.J. Free-Field Evoked Auditory Brainstem Responses in Cochlear Implant Users. Audiol. Res. 2018, 8, 216. https://doi.org/10.4081/audiores.2018.216

AMA Style

Schebsdat E, Kohl MC, Corona-Strauss FI, Seidler H, Strauss DJ. Free-Field Evoked Auditory Brainstem Responses in Cochlear Implant Users. Audiology Research. 2018; 8(2):216. https://doi.org/10.4081/audiores.2018.216

Chicago/Turabian Style

Schebsdat, Erik, Manuel C. Kohl, Farah I. Corona-Strauss, Harald Seidler, and Daniel J. Strauss. 2018. "Free-Field Evoked Auditory Brainstem Responses in Cochlear Implant Users" Audiology Research 8, no. 2: 216. https://doi.org/10.4081/audiores.2018.216

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