The long term goals of the research proposed here is to account for three aspects of speech recognition by patients who use a multichannel cochlear prosthesis: (1) Different initial (1 month) levels of performance; (2) different rates of improvement during the first year of implant use and (3) different terminal levels of performance. Preliminary studies suggest that two factors may account in large measure for the differences in terminal performance: the range of pitch sensation available through the prosthesis and the dynamic range of intensity available to the patient. We propose to assess the relationship between measures of auditory function (pitch scaling, frequency DLs, dynamic range and intensity DLs) and speech recognition (vowel and consonant recognition, spondee recognition, monosyllabic word recognition and recognition of words in sentences) in patients who use the Symbion 4-channel prosthesis. Two experiments are proposed. In one experiment, measures of auditory function and measures of speech recognition will be assessed for patients who have reached an asymptotic level of speech recognition. Four groups of 10 patients will be tested-- two groups with poor speech recognition scores, one group with average speech recognition scores and one group with good speech recognition scores. In the second experiment, the measures of performance will be taken at intervals of 1 month, 6 months and 1 year after patients (n =12) have been fit with a prosthesis. If we can relate differences in speech recognition to differences in auditory function, then we will have gained a major step in understanding speech recognition by patients who use cochlear prostheses.

Agency
National Institute of Health (NIH)
Institute
National Institute on Deafness and Other Communication Disorders (NIDCD)
Type
Research Project (R01)
Project #
1R01DC000654-01
Application #
3217273
Study Section
Hearing Research Study Section (HAR)
Project Start
1989-12-01
Project End
1992-11-30
Budget Start
1989-12-01
Budget End
1990-11-30
Support Year
1
Fiscal Year
1990
Total Cost
Indirect Cost
Name
Arizona State University-Tempe Campus
Department
Type
Schools of Arts and Sciences
DUNS #
188435911
City
Tempe
State
AZ
Country
United States
Zip Code
85287
Dorman, Michael F; Loiselle, Louise; Stohl, Josh et al. (2014) Interaural level differences and sound source localization for bilateral cochlear implant patients. Ear Hear 35:633-40
Spahr, Anthony J; Dorman, Michael F; Litvak, Leonid M et al. (2012) Development and validation of the AzBio sentence lists. Ear Hear 33:112-7
Gifford, Rene H; Dorman, Michael F (2012) THE PSYCHOPHYSICS OF LOW-FREQUENCY ACOUSTIC HEARING IN ELECTRIC AND ACOUSTIC STIMULATION (EAS) AND BIMODAL PATIENTS. J Hear Sci 2:33-44
Gifford, René H; Dorman, Michael F; Brown, Chris et al. (2012) HEARING, PSYCHOPHYSICS, AND COCHLEAR IMPLANTATION: EXPERIENCES OF OLDER INDIVIDUALS WITH MILD SLOPING TO PROFOUND SENSORY HEARING LOSS. J Hear Sci 2:9-17
Zhang, Ting; Dorman, Michael F; Spahr, Anthony J (2010) Information from the voice fundamental frequency (F0) region accounts for the majority of the benefit when acoustic stimulation is added to electric stimulation. Ear Hear 31:63-9
Zhang, Ting; Spahr, Anthony J; Dorman, Michael F (2010) Frequency overlap between electric and acoustic stimulation and speech-perception benefit in patients with combined electric and acoustic stimulation. Ear Hear 31:195-201
Gifford, René H; Dorman, Michael F; Shallop, Jon K et al. (2010) Evidence for the expansion of adult cochlear implant candidacy. Ear Hear 31:186-94
Gifford, Rene H; Dorman, Michael F; Brown, Christopher A (2010) Psychophysical properties of low-frequency hearing: implications for perceiving speech and music via electric and acoustic stimulation. Adv Otorhinolaryngol 67:51-60
Gilley, Phillip M; Sharma, Anu; Mitchell, Teresa V et al. (2010) The influence of a sensitive period for auditory-visual integration in children with cochlear implants. Restor Neurol Neurosci 28:207-18
Dorman, Michael F; Gifford, Rene H (2010) Combining acoustic and electric stimulation in the service of speech recognition. Int J Audiol 49:912-9

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