부산대학교 도서관

Introduction: The results of cochlear implant (CI) is individual but in everyday listening situations, the combination of reverberation, background noise and speaker distance results in poor listening conditions and the impact is even greater for the hearing impaired. The Roger system is an adaptive multichannel remote microphone technology with a digital modulation that is indicate for use in difficult communications. Objective: The purpose of the study is to evaluate the benefits of the Roger system in CI users. Method: It is a prospective cross-sectional study in which 13 adults post-lingual deafness, Medel recipients were randomly chosen. For the evaluation of the benefit of the Roger system, the participant was positioned in the center of a room with eight speakers, with reverberation time (T60) measured at 429.40ms. Words or sentences recognition was evaluated at zero azimuth at one meter of the subject's head at 65 dB SPL, and the multi-talker babble noise was presented in the other speakers at 55 dB SPL. The contribution of Roger to reverberant environments was evaluated in silence (S0) and Roger's contribution to noise in 2 positioning situations (S0N0-signal and noise at zero azimuth and S0N315-signal at zero azimuth and noise at all directions). The difficulty of the speech material was chosen according to the performance in the silence. The percentage of correct answers in each test was compared between the test situations. Results: Roger's contribution to reverberant environments was identified in 46% of patients with a 26% improvement in performance. Roger's contribution to noise with zero azimuth positioning was identified in 30% of patients with a 9% improvement in performance. Roger's contribution to noise from all directions was identified in 61% of patients with a 20% improvement in performance. Conclusion: The Roger system contributed to speech recognition in reverberant environments and when noise is surrounding. [ABSTRACT FROM AUTHOR]