Auditory-Visual Speech Processing (AVSP) 2010
Hakone, Kanagawa, Japan
Hearing impaired people who received cochlear implants (CI) typically need some adaptation period over several years to maximize the benefit of CI. During the adaptation period, visual speech should play an important role. Although such a role of visual speech has been largely investigated for child CI users, it is not clear for adults. Here we investigated audiovisual speech perception in people who received CI as adults. Thirteen Japanese adult CI users were tested with Japanese meaningful word lists presented in auditory-visual (AV), auditory-only (AO), and visual-only (VO) conditions. The AV and AO conditions consisted of both quiet and noisy conditions. Percent correct responses showed that the resistance to noise is developed in 4 years of CI use for AV speech perception, and in about 8 years for AO speech perception. Results also showed that AO and AV performances were generally poor when the length of hearing loss was longer than 5 years. The performance in the VO condition was not related to that in AV condition, indicating that the AV benefit is a combining effect.
Index Terms: cochlear implant, speech perception in noise, adult
Bibliographic reference. Kanekama, Yori / Hisanaga, Satoko / Sekiyama, Kaoru / Kodama, Narihiro / Samejima, Yasuhiro / Yamada, Takao / Yumoto, Eiji (2010): "Long-term cochlear implant users have resistance to noise, but short-term users dont", In AVSP-2010, paper S4-1.