Auditory-Visual Speech Processing (AVSP) 2010

Hakone, Kanagawa, Japan
September 30-October 3, 2010

Long-term Cochlear Implant Users Have Resistance to Noise, but Short-Term Users Don’t

Yori Kanekama (1), Satoko Hisanaga (2), Kaoru Sekiyama (1), Narihiro Kodama (3), Yasuhiro Samejima (3), Takao Yamada (3), Eiji Yumoto (4)

(1) Faculty of Letters, Kumamoto University, Japan
(2) Graduate School of Social and Cultural Sciences, Kumamoto University, Japan
(3) Department of Otolaryngology-Head and Neck Surgery, Kumamoto University
(4) Department of Otolaryngology-Head and Neck Surgery, Graduate School of Medicine, Kumamoto University

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

Full Paper

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 don’t", In AVSP-2010, paper S4-1.