Subjective and Objective Results After Bilateral Cochlear Implantation in Adults

Laske, Roman D.; Veraguth, Dorothe; Dillier, Norbert; Binkert, Andrea; Holzmann, David; Huber, Alexander

doi:10.1097/mao.0b013e31819bd7e6

Cited by 95 publications

(111 citation statements)

References 35 publications

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“…In this configuration and in a sound-treated room, SRM reaches only 3 to 5 dB (e.g., Litovsky et al, 2009). However, three studies have tested CI users in the symmetrical situation where speech and noise sources are placed at equal and opposite azimuths (645 or 660 ) Laske et al, 2009;Laszig et al, 2004). These studies demonstrated that with speech and noise sources separated by 90 or 120 , a head orientated midway between the sound sources could lead to a significant head-shadow benefit of bilateral over unilateral implantation (10 to 18 dB).…”

Section: Introductionmentioning

confidence: 99%

Head orientation benefit to speech intelligibility in noise for cochlear implant users and in realistic listening conditions

Grange

Culling

2016

The Journal of the Acoustical Society of America

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Cochlear implant (CI) users suffer from elevated speech-reception thresholds and may rely on lip reading. Traditional measures of spatial release from masking quantify speech-reception-threshold improvement with azimuthal separation of target speaker and interferers and with the listener facing the target speaker. Substantial benefits of orienting the head away from the target speaker were predicted by a model of spatial release from masking. Audio-only and audio-visual speech-reception thresholds in normal-hearing (NH) listeners and bilateral and unilateral CI users confirmed model predictions of this head-orientation benefit. The benefit ranged 2–5 dB for a modest 30° orientation that did not affect the lip-reading benefit. NH listeners' and CI users' lip-reading benefit measured 3 and 5 dB, respectively. A head-orientation benefit of ∼2 dB was also both predicted and observed in NH listeners in realistic simulations of a restaurant listening environment. Exploiting the benefit of head orientation is thus a robust hearing tactic that would benefit both NH listeners and CI users in noisy listening conditions.

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Section: Introductionmentioning

confidence: 99%

Head orientation benefit to speech intelligibility in noise for cochlear implant users and in realistic listening conditions

Grange

Culling

2016

The Journal of the Acoustical Society of America

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“…The assessment of speech intelligibility in noise has been a key focus in a considerable number of studies with adult bilateral cochlear implantees (e.g., Schön et al, 1999;van Hoesel and Clark, 1999;Gantz et al, 2002;Müller et al, 2002;Schön et al, 2002;Stark et al, 2002;Tyler et al, 2002;van Hoesel et al, 2002;Au et al, 2003;van Hoesel and Tyler, 2003;Dormann and Dahlstrom, 2004;Laszig et al, 2004;Schleich et al, 2004;Ramsden et al, 2005;Senn et al, 2005;Litovsky et al, 2006Litovsky et al, , 2009Ricketts et al, 2006;Tyler et al, 2006Tyler et al, , 2007Buss et al, 2008;Chan et al, 2008;Dunn et al, 2008;Zeitler et al, 2008;Eapen et al, 2009;Laske et al, 2009;Loizou et al, 2009;Koch et al, 2009;Mosnier et al, 2009). Despite variation in methodology and materials, it is generally the case that the largest speech intelligibility benefit from having two implants derives from the monaural effect of the headshadow at each ear, which allows the listener to attend the ear with the better signal-to-noise ratio (SNR) when target and interferers are spatially separated.…”

Section: Introductionmentioning

confidence: 99%

Statistical bias in the assessment of binaural benefit relative to the better ear

Hoesel

Litovsky

2011

The Journal of the Acoustical Society of America

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The comparison of measured binaural performance with the better of two monaural measures (one from each ear) may lead to underestimated binaural benefit due to statistical sampling bias that favors the monaural condition. The mathematical basis of such bias is reviewed and applied to speech reception thresholds measured in 32 bilateral cochlear implant (CI) users for coincident and spatially separated speech and noise. It is shown that the bias increases with test-retest variation and is maximal for uncorrelated samples of identical underlying performance in each ear. When measured differences between ears were assumed to reflect actual underlying performance differences, the bias averaged across the CI users was about 0.2 dB for coincident target and noise, and 0.1 dB for spatially separated conditions. An upper-bound estimate of the bias, based on the assumption that both ears have the same underlying performance and observed differences were due to test-retest variation, was about 0.7 dB regardless of noise location. To the extent that the test-retest variation in these data is comparable to other studies, the results indicate that binaural benefits in bilateral cochlear implant users are not substantially underestimated (on for average) when binaural performance is compared with the better ear in each listening configuration.

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“…Thus, the SSQ scale explores aspects of hearing through 49 items organized into three subscales measuring: the capacity of the individual to listen to speech in different hearing contexts (Part 1 -speech hearing); localization of sound events for different directions, distances and movement (Part 2 -spatial hearing); and the listening experience in relation to segregating sounds, identification/ recognition, clarity and naturalness, musical perception and listening effort; (Part 3 -qualities of hearing) (5) . In the international literature, there are studies that apply the SSQ in different contexts investigating hearing loss and its impact (6,7,8,9) . Recently, in Brazil, SSQ 49 version 5.6 was translated and culturally adapted to Brazilian Portuguese and is currently undergoing the process of validation (10) .…”

Section: Introductionmentioning

confidence: 99%

Incapacidade auditiva medida por meio do questionário Speech, Spatial and Qualities of Hearing Scale (SSQ): estudo piloto da versão reduzida em Português Brasileiro

Miranda-Gonsalez

Almeida

2017

Audiol., Commun. Res.

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Introduction:The Speech, Spatial and Qualities of Hearing Scale (SSQ) is a questionnaire that assesses subjective experience and quantifies hearing disabilities in communication situations. Purpose: To carry out a pilot study of a short version of the SSQ questionnaire in Brazilian Portuguese to measure hearing disability resulting from hearing loss. Methods: We selected 30 individuals, 12 males and 18 females, aged 18 to 89 years, with average education of nine years. The subjects underwent pure tone audiometry, speech audiometry tests and immittance measurements. Participants were divided into two groups according to hearing threshold, comprising 15 with normal hearing (NL) and 15 with hearing loss (HL). All participants answered the SSQ questionnaire -short version (12 items) -in the form of an interview, rating their communication performance in all situations assessed with a score of 0 to 10. Results: The mean scores obtained were 6.68 and 4.13 for the NL and HL groups, respectively. Individuals with hearing loss had lower scores than subjects with normal hearing. A high Cronbach's alpha coefficient was found in both groups, demonstrating good internal consistency between the different items of the questionnaire. Conclusion: The short version of the SSQ in Brazilian Portuguese was sensitive in differentiating the performance of individuals with and without hearing loss, confirming its potential for assessing limitations in hearing and communication activities experienced by hearing-impaired individuals in their everyday lives.

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Subjective and Objective Results After Bilateral Cochlear Implantation in Adults

Cited by 95 publications

References 35 publications

Head orientation benefit to speech intelligibility in noise for cochlear implant users and in realistic listening conditions

Head orientation benefit to speech intelligibility in noise for cochlear implant users and in realistic listening conditions

Statistical bias in the assessment of binaural benefit relative to the better ear

Incapacidade auditiva medida por meio do questionário Speech, Spatial and Qualities of Hearing Scale (SSQ): estudo piloto da versão reduzida em Português Brasileiro

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