While cochlear implants (CIs) have proven to restore speech perception to a remarkable extent, access to music remains difficult for most CI users. The current findings also open new perspectives about how to enhance pitch perception capacities using visual cues. Overall, this assessment allows for the rapid detection of specific patterns of non-verbal auditory perception deficits. Similarly, the CI users had deficits for small differences in the pitch change detection task and emotion recognition, as well as a decreased streaming capacity. With the vocoded sounds, the NH participants had reduced scores for the detection of small pitch differences, and reduced emotion recognition and streaming abilities compared to the original sounds. We tested 10 normal-hearing (NH) participants with material being presented as original and vocoded sounds, and 10 post-lingually deaf CI users. In order to test the potential benefit of visual cues for pitch processing, the three pitch tests included half of the trials with visual indications to perform the task. These tests measure pitch change detection, pitch direction identification, pitch short-term memory, auditory stream segregation, and emotional prosody recognition, along with perceived intensity ratings. Aiming to assess non-verbal auditory perception in CI users, we developed five listening tests. Despite the advantages of CIs for speech perception, CI users still complain about their poor perception of their auditory environment. In the case of hearing loss, cochlear implants (CI) allow for the restoration of hearing. With fixed constraints on spectral resolution, such as occurs with hearing loss or an auditory prosthesis, training and experience can provide considerable improvements in music perception and appreciation. However, musically experienced CI users often performed as well as NH listeners, and MCI training in less-experienced subjects greatly improved performance. In general, CI users had great difficulty extracting melodic pitch from complex stimuli. CI users’ MCI performance was significantly affected by instrument timbre, as well as by the presence of a competing instrument. While normal-hearing (NH) listeners’ performance was consistently high across experiments, MCI performance was highly variable across CI users. In this paper, we present recent experiments that directly measure CI users’ melodic pitch perception using a melodic contour identification (MCI) task. Thus, temporal envelope cues are adequate for speech perception under optimal listening conditions, while spectral fine structure cues are needed for music perception. Melody recognition requires some capacity for complex pitch perception, which in turn depends strongly on access to spectral fine structure cues. This coarse representation provides enough information to support speech understanding in quiet and rhythmic perception in music, but not enough to support speech understanding in noise or melody recognition. CI devices typically transmit 16–22 spectral channels, each modulated slowly in time. Research and outcomes with cochlear implants (CIs) have revealed a dichotomy in the cues necessary for speech and music recognition.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |