ArticleEuropean archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery2026
The effect of unilateral and bimodal auditory stimulation on auditory perception and reaction time.
Article in European archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
purposeThis study aimed to evaluate the differences between unilateral cochlear implant (CI) use and bimodal auditory stimulation regarding speech perception in noise and auditory reaction times.
methodsThis cross-sectional study included 26 adults (aged 18-53 years) with a unilateral CI and a contralateral hearing aid. Participants underwent free-field audiometry (FFA), Speech Reception Threshold (SRT) testing, the Turkish Matrix Test (TMT) in quiet and noise, and the Auditory Reaction Time Test (ARTT). Measurements were compared between unilateral (CI only) and bimodal (CI plus hearing aid) conditions.
resultsBimodal stimulation yielded significantly better free-field and speech reception thresholds compared to the unilateral condition (p < 0.001). In the TMT, speech perception thresholds improved with bimodal stimulation in both quiet (44.9 ± 8.7 vs. 53.7 ± 9.3 dB SPL) and noise (1.1 ± 3.1 vs. 4.3 ± 3.1 dB SNR) (p < 0.001). Additionally, simple auditory reaction times were significantly shorter in the bimodal condition (518.5 ± 51.9 ms) than in the unilateral condition (559.6 ± 54.6 ms) (p < 0.001). Similar improvements were observed in choice reaction times (p < 0.001).
conclusionBimodal auditory stimulation significantly enhances auditory performance and reaction speed compared to unilateral CI use. These findings suggest that bimodal fitting improves binaural integration and processing efficiency, which is beneficial for speech intelligibility in challenging listening environments.
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