In the near future, the majority of unilateral cochlear implant (CI) users will have usable residual acoustic hearing in the non-implanted ear (Dorman et al., 2009a). For these patients, speech understanding is best when electric (E) and acoustic (A) stimulation (S) are combined (EAS). There is, however, a great deal of variability in the amount and time course of EAS benefit. The long-term goal of the proposed research is to maximize the speech performance of EAS patients with targeted auditory training.
The aim i s to investigate the effects of speech training in quiet on the EAS benefit. Twenty, adult, postlingually-deafened, CI users with a conventional CI in one ear and with a hearing aid (HA) in the non-implanted ear will be recruited. All subjects will be tested in baseline measures including speech recognition performance in quiet and in noise, and subjective hearing assessments ("baseline"). After completing measurement of baseline performance, the subjects will be equally divided into two groups: 1) training with E-only stimulation via CI and 2) training with EAS via HA+CI. Phonemic contrast training in quiet will be performed at home with minimal supervision using custom software loaded onto subjects'home computers. Subjects will be trained for a half-hour per day/5 days per week for 1 month. After training is completed, baseline performance will be re-measured again ("post-training") to see any effects of targeted training. One month after training is stopped, baseline performance will be re- measured again ("follow-up") to see whether any training benefits were retained. The proposed experiment will provide insight into the effects of speech training in EAS patients for a variety of listening conditions. More importantly, the training may directly benefit EAS patients who participate in the experiment and provide guidance for appropriate auditory rehabilitation techniques for all EAS patients.

Public Health Relevance

The proposed research is of theoretical interest as it will provide insight into the effects of speech training in EAS patients for a variety of listening conditions, both acutely and after an extended period of training. The research is also of great clinical interest as it will provide guidance to the most effective and efficient training approaches to improve EAS patients'performance. If there is a significant improvement in EAS performance with training, auditory training should be a necessary component of post implant aural habilitation.

Agency
National Institute of Health (NIH)
Institute
National Institute on Deafness and Other Communication Disorders (NIDCD)
Type
Postdoctoral Individual National Research Service Award (F32)
Project #
5F32DC010937-03
Application #
8321391
Study Section
Communication Disorders Review Committee (CDRC)
Program Officer
Sklare, Dan
Project Start
2010-09-01
Project End
2013-08-31
Budget Start
2012-09-01
Budget End
2013-08-31
Support Year
3
Fiscal Year
2012
Total Cost
$55,670
Indirect Cost
Name
Arizona State University-Tempe Campus
Department
Other Health Professions
Type
Schools of Allied Health Profes
DUNS #
943360412
City
Tempe
State
AZ
Country
United States
Zip Code
85287
Zhang, Ting; Dorman, Michael F; Gifford, Rene et al. (2014) Cochlear dead regions constrain the benefit of combining acoustic stimulation with electric stimulation. Ear Hear 35:410-7
Dorman, Michael F; Spahr, Anthony J; Loiselle, Louise et al. (2013) Localization and speech understanding by a patient with bilateral cochlear implants and bilateral hearing preservation. Ear Hear 34:245-8
Zhang, Ting; Spahr, Anthony J; Dorman, Michael F et al. (2013) Relationship between auditory function of nonimplanted ears and bimodal benefit. Ear Hear 34:133-41