Abstract
Many studies have documented the benefits to speech understanding when cochlear implant (CI) patients can access low-frequency acoustic information from the ear opposite the implant. In this study we assessed the role of three factors in determining the magnitude of bimodal benefit - (i) the level of CI-only performance, (ii) the magnitude of the hearing loss in the ear with low-frequency acoustic hearing and (iii) the type of test material. The patients had low-frequency PTAs (average of 125, 250 and 500Hz) varying over a large range (<30dB HL to >70dB HL) in the ear contralateral to the implant. The patients were tested with (i) CNC words presented in quiet (. n=105) (ii) AzBio sentences presented in quiet (. n=102), (iii) AzBio sentences in noise at+10dB signal-to-noise ratio (SNR) (. n=69), and (iv) AzBio sentences at+5dB SNR (. n=64). We find maximum bimodal benefit when (i) CI scores are less than 60 percent correct, (ii) hearing loss is less than 60dB HL in low-frequencies and (iii) the test material is sentences presented against a noise background. When these criteria are met, some bimodal patients can gain 40-60 percentage points in performance relative to performance with a CI.This article is part of a Special Issue entitled <Lasker Award>.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 107-111 |
| Number of pages | 5 |
| Journal | Hearing Research |
| Volume | 322 |
| DOIs | |
| State | Published - Apr 1 2015 |
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ASJC Scopus subject areas
- Sensory Systems
Cite this
Factors constraining the benefit to speech understanding of combining information from low-frequency hearing and a cochlear implant. / Dorman, Michael; Cook, Sarah; Spahr, Anthony; Zhang, Ting; Loiselle, Louise; Schramm, David; Whittingham, JoAnne; Gifford, Rene.
In: Hearing Research, Vol. 322, 01.04.2015, p. 107-111.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Factors constraining the benefit to speech understanding of combining information from low-frequency hearing and a cochlear implant
AU - Dorman, Michael
AU - Cook, Sarah
AU - Spahr, Anthony
AU - Zhang, Ting
AU - Loiselle, Louise
AU - Schramm, David
AU - Whittingham, JoAnne
AU - Gifford, Rene
PY - 2015/4/1
Y1 - 2015/4/1
N2 - Many studies have documented the benefits to speech understanding when cochlear implant (CI) patients can access low-frequency acoustic information from the ear opposite the implant. In this study we assessed the role of three factors in determining the magnitude of bimodal benefit - (i) the level of CI-only performance, (ii) the magnitude of the hearing loss in the ear with low-frequency acoustic hearing and (iii) the type of test material. The patients had low-frequency PTAs (average of 125, 250 and 500Hz) varying over a large range (<30dB HL to >70dB HL) in the ear contralateral to the implant. The patients were tested with (i) CNC words presented in quiet (. n=105) (ii) AzBio sentences presented in quiet (. n=102), (iii) AzBio sentences in noise at+10dB signal-to-noise ratio (SNR) (. n=69), and (iv) AzBio sentences at+5dB SNR (. n=64). We find maximum bimodal benefit when (i) CI scores are less than 60 percent correct, (ii) hearing loss is less than 60dB HL in low-frequencies and (iii) the test material is sentences presented against a noise background. When these criteria are met, some bimodal patients can gain 40-60 percentage points in performance relative to performance with a CI.This article is part of a Special Issue entitled <Lasker Award>.
AB - Many studies have documented the benefits to speech understanding when cochlear implant (CI) patients can access low-frequency acoustic information from the ear opposite the implant. In this study we assessed the role of three factors in determining the magnitude of bimodal benefit - (i) the level of CI-only performance, (ii) the magnitude of the hearing loss in the ear with low-frequency acoustic hearing and (iii) the type of test material. The patients had low-frequency PTAs (average of 125, 250 and 500Hz) varying over a large range (<30dB HL to >70dB HL) in the ear contralateral to the implant. The patients were tested with (i) CNC words presented in quiet (. n=105) (ii) AzBio sentences presented in quiet (. n=102), (iii) AzBio sentences in noise at+10dB signal-to-noise ratio (SNR) (. n=69), and (iv) AzBio sentences at+5dB SNR (. n=64). We find maximum bimodal benefit when (i) CI scores are less than 60 percent correct, (ii) hearing loss is less than 60dB HL in low-frequencies and (iii) the test material is sentences presented against a noise background. When these criteria are met, some bimodal patients can gain 40-60 percentage points in performance relative to performance with a CI.This article is part of a Special Issue entitled <Lasker Award>.
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UR - http://www.scopus.com/inward/citedby.url?scp=84925399455&partnerID=8YFLogxK
U2 - 10.1016/j.heares.2014.09.010
DO - 10.1016/j.heares.2014.09.010
M3 - Article
VL - 322
SP - 107
EP - 111
JO - Hearing Research
JF - Hearing Research
SN - 0378-5955
ER -