Exploring auditory emotion perception in cochlear implant users: Investigating the interplay of speech processing and affective signals

Abstract

Human emotions are intricately expressed through vocal sounds, encompassing affective prosody in speech and non-verbal cues such as screams and laughter. Recent evidence indicates that vocalizations take neurophysiological precedence over speech-embedded emotions and are generally easier to identify. However, Cochlear implant (CI) users still face challenges deciphering the subtle nuances in these primal signals. The implant's limited fidelity in transmitting acoustic information results in highly variable levels of emotion perception abilities among its users. Identifying the factors explaining this significant variability in abilities among CI users remains of great interest. Our recent investigations into CI users' abilities to perceive emotions and speaker sincerity have often incorporated diverse aspects of auditory proficiency, including pitch discrimination, music processing, and speech intelligibility. The combination of results from these different projects can help shed light on the intricate interplay between speech processing and emotional recognition in CI users. Surprisingly, even when presented with emotional musical stimuli, CI users' proficiency often leaned toward processes related to speech intelligibility, proposing common mechanisms underlying linguistic and affective processes in CI users that do not readily relate to musical skills or pitch sensitivity. Hence, maintaining a clinical focus on speech processing remains crucial, even when exploring affective skills in CI users.