Moradi Vahid, Farahani Saeid, Fatahi Farzaneh, Mohebbi Saleh, Emamdjomeh Hessam
Department of Audiology, School of Rehabilitation Sciences, Tehran University of Medical Sciences, Tehran, IRN.
Skull Base Research Center, the Five Senses Institute, Iran University of Medical Sciences, Tehran, IRN.
Cureus. 2020 Sep 9;12(9):e10338. doi: 10.7759/cureus.10338.
Introduction Pitch mismatch is one of the most important problems of users of bimodal cochlear implants, which affects their life satisfaction. Children with acquired hearing loss cannot explain their pitch mismatch problems, as they have had no auditory experience. This study tries to diagnose pitch mismatch in these children through the sound-induced flash illusion test. Materials and methods In this study, 20 children with a bimodal cochlear implant and 20 children with normal hearing, within the age range of 8 to 13 years old, were examined using the sound-induced flash illusion test. In this test, participants received one flash with one to four beep sounds, and they were asked to indicate the number of perceived flashes. Results The results revealed that in the bimodal implantation group, when the flash was provided with one beep, at certain frequencies, children expressed that they saw two flashes. However, the results were not the same in children with normal hearing. Conclusion The results indicated that at frequencies where the auditory information of the hearing aids and those of the cochlear implants overlap, pitch mismatch develops, which can significantly affect the auditory performance of bimodal users.
引言
音调不匹配是双模式人工耳蜗使用者面临的最重要问题之一，这会影响他们的生活满意度。后天性听力损失的儿童无法解释他们的音调不匹配问题，因为他们没有听觉体验。本研究试图通过声音诱发闪光错觉测试来诊断这些儿童的音调不匹配情况。
材料与方法
在本研究中，对20名年龄在8至13岁之间的双模式人工耳蜗植入儿童和20名听力正常的儿童进行了声音诱发闪光错觉测试。在该测试中，参与者会听到一声伴有一到四声哔哔声的闪光，然后被要求指出所感知到的闪光次数。
结果
结果显示，在双模式植入组中，当闪光伴有一声哔哔声且在特定频率时，儿童表示他们看到了两次闪光。然而，听力正常的儿童结果却不一样。
结论
结果表明，在助听器和人工耳蜗的听觉信息重叠的频率处，会出现音调不匹配，这会显著影响双模式使用者的听觉表现。
