Speech perception with interaction-compensated simultaneous stimulation and long pulse durations in cochlear implant users

Schatzer, Reinhold; Королева, И. В.; Griessner, Andreas; Levin, Sergey V.; Kusovkov, V E; Yanov, Yu. K.; Zierhofer, Clemens

doi:10.1016/j.heares.2014.11.002

Cited by 4 publications

(4 citation statements)

References 33 publications

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“…Med-El has attempted to address the issue of TFS by introducing “fine structure processing” (FSP) that complements the conventional CIS strategy with TFS by introducing variable pulse rates on the apical electrodes. However, like SpecRes, the results obtained with FSP and related fine structure strategies have been mixed: while some studies found significant improvements of speech understanding in noise (Arnoldner et al 2007 ; Riss et al 2009 ; Vermeire et al 2010 ; Müller et al 2012 ), others did not (Magnusson 2011 ; Qi et al 2012 ; Schatzer et al 2015 ).…”

Section: Introductionmentioning

confidence: 99%

The Temporal Fine Structure of Background Noise Determines the Benefit of Bimodal Hearing for Recognizing Speech

Stronks

Briaire

Frijns

2020

JARO

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Cochlear implant (CI) users have more difficulty understanding speech in temporally modulated noise than in steady-state (SS) noise. This is thought to be caused by the limited low-frequency information that CIs provide, as well as by the envelope coding in CIs that discards the temporal fine structure (TFS). Contralateral amplification with a hearing aid, referred to as bimodal hearing, can potentially provide CI users with TFS cues to complement the envelope cues provided by the CI signal. In this study, we investigated whether the use of a CI alone provides access to only envelope cues and whether acoustic amplification can provide additional access to TFS cues. To this end, we evaluated speech recognition in bimodal listeners, using SS noise and two amplitude-modulated noise types, namely babble noise and amplitude-modulated steady-state (AMSS) noise. We hypothesized that speech recognition in noise depends on the envelope of the noise, but not on its TFS when listening with a CI. Secondly, we hypothesized that the amount of benefit gained by the addition of a contralateral hearing aid depends on both the envelope and TFS of the noise. The two amplitude-modulated noise types decreased speech recognition more effectively than SS noise. Against expectations, however, we found that babble noise decreased speech recognition more effectively than AMSS noise in the CI-only condition. Therefore, we rejected our hypothesis that TFS is not available to CI users. In line with expectations, we found that the bimodal benefit was highest in babble noise. However, there was no significant difference between the bimodal benefit obtained in SS and AMSS noise. Our results suggest that a CI alone can provide TFS cues and that bimodal benefits in noise depend on TFS, but not on the envelope of the noise.

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Section: Introductionmentioning

confidence: 99%

The Temporal Fine Structure of Background Noise Determines the Benefit of Bimodal Hearing for Recognizing Speech

Stronks

Briaire

Frijns

2020

JARO

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“…Pfingst et al, 2015 present human and animal studies on not only the importance of cochlear health for implant function but also tissue-engineering procedures for improving or even replacing the implant function. Other researchers present various approaches to further improve cochlear implant function and expand its utilities, including reducing or exploiting channel interaction (Kalkman et al, 2015;Schatzer et al, 2015); coordinated electro-acoustic stimulation (Dorman et al, 2015;Tillein et al, 2015); bilateral implantation (Kan and Litovsky, 2015;Laback et al, 2015); learning or training (Chatterjee et al, 2015;Svirsky et al, 2015;van Wieringen and Wouters, 2015); audio-visual integration and brain imaging (Strelnikova et al, 2015); and lowering the cost (Zeng et al, 2015).…”

Section: Recent Research and Developmentmentioning

confidence: 99%

Recognizing the journey and celebrating the achievement of cochlear implants

Zeng

Canlon²

2015

Hearing Research

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“…The finding that alternating polarity conditions reduced current suggests alternating polarity across pulses could potentially be used to improve power efficiency of cochlear implants (e.g., Schatzer et al, 2015). However, there are a number of reasons that the present implementation of alternating polarities may not adequately convey speech information.…”

Section: Discussionmentioning

confidence: 97%

“…Because cochlear implant stimulation makes use of high pulse rates, pulses in some cases, occur contiguously in time. Thus, the facilitative effect of alternating polarity across pulses could potentially be used to improve power efficiency of cochlear implants due to lower current amplitude requirements (e.g., Schatzer et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

The effect of polarity order and electrode-activation order on loudness in cochlear implant users

Todd

Landsberger

2018

The Journal of the Acoustical Society of America

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This study examined the interaction between polarity and electrode-activation order on loudness in cochlear implant users. Pulses were presented with the polarity of the leading phase alternating or constant across channels. Electrode-activation order was either consecutive or staggered. Staggered electrode-activation orders required less current for equal loudness than consecutive orders with constant polarity. Consecutive electrode-activation orders required less current than staggered orders with alternating polarity. The results support the hypothesis that crosstalk between channels can interfere with or facilitate neuronal activation depending on polarity.

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Speech perception with interaction-compensated simultaneous stimulation and long pulse durations in cochlear implant users

Cited by 4 publications

References 33 publications

The Temporal Fine Structure of Background Noise Determines the Benefit of Bimodal Hearing for Recognizing Speech

The Temporal Fine Structure of Background Noise Determines the Benefit of Bimodal Hearing for Recognizing Speech

Recognizing the journey and celebrating the achievement of cochlear implants

The effect of polarity order and electrode-activation order on loudness in cochlear implant users

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