Directional Microphone Contralateral Routing of Signals in Cochlear Implant Users: A Within-Subjects Comparison.

Wimmer, Wilhelm; Kompis, Martin; Stieger, Christof; Caversaccio, Marco; Weder, Stefan (2017). Directional Microphone Contralateral Routing of Signals in Cochlear Implant Users: A Within-Subjects Comparison. Ear and hearing, 38(3), pp. 368-373. Lippincott Williams & Wilkins 10.1097/AUD.0000000000000412

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OBJECTIVES For medical or financial reasons, bilateral cochlear implantation is not always possible in bilaterally deafened patients. In such cases, a contralateral routing of signals (CROS) device could complement the monaural implant. The goal of our study was to compare the benefit of three different conditions: (1) unilateral cochlear implant (CI) alone, (2) unilateral CI complemented with a directional CROS microphone, and (3) bilateral CIs. DESIGN Twelve bilateral experienced CI users were tested. Speech reception in noise and sound localization were measured in the three above-mentioned conditions. Patients evaluated which condition they presumed to be activated and the subjective benefit on a hearing scale. RESULTS Compared with the unilateral CI condition, the additional CROS device provided significantly better speech intelligibility in noise when speech signals came from the front or side of the CROS microphone. Only small subjective improvement was observed. Bilateral-activated CIs further improved the hearing performance. This was the only condition where sound localization was possible. Subjective evaluation showed a clear preference for the bilateral CI treatment. CONCLUSIONS In bilateral deafened patients, bilateral implantation is the most preferable form of treatment. However, patients with one implant only could benefit from an additional directional microphone CROS device.

Item Type:

Journal Article (Original Article)


04 Faculty of Medicine > Department of Head Organs and Neurology (DKNS) > Clinic of Ear, Nose and Throat Disorders (ENT)
10 Strategic Research Centers > ARTORG Center for Biomedical Engineering Research > ARTORG Center - Hearing Research Laboratory

UniBE Contributor:

Wimmer, Wilhelm; Kompis, Martin; Caversaccio, Marco and Weder, Stefan


600 Technology > 610 Medicine & health




Lippincott Williams & Wilkins


[67] Burgergemeinde Bern




Wilhelm Wimmer

Date Deposited:

29 May 2017 07:35

Last Modified:

01 Apr 2020 09:52

Publisher DOI:


PubMed ID:





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