Acoustic simulation of cochlear implant hearing: Effect of manipulating various acoustic parameters on intelligibility of speech

Jain, Saransh; Ghosh, P.

doi:10.1080/14670100.2017.1386384

Cited by 4 publications

(5 citation statements)

References 34 publications

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“…Part of the success of cochlear implants seems to be related to the development of sophisticated signal-processing techniques and bioinspired coding strategies developed over the years (Clark, 2015;Boulet et al, 2016;Jain and Vipin Ghosh, 2018). Despite these encouraging results, most visual prosthesis devices only try to emulate the phototransducer aspects of the retina and do not consider the complex processes that are found in the mammalian visual system.…”

Section: Delivery Of Information To Implantsmentioning

confidence: 99%

Toward Long-Term Communication With the Brain in the Blind by Intracortical Stimulation: Challenges and Future Prospects

2020

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The restoration of a useful visual sense in a profoundly blind person by direct electrical stimulation of the visual cortex has been a subject of study for many years. However, the field of cortically based sight restoration has made few advances in the last few decades, and many problems remain. In this context, the scientific and technological problems associated with safe and effective communication with the brain are very complex, and there are still many unresolved issues delaying its development. In this work, we review some of the biological and technical issues that still remain to be solved, including longterm biotolerability, the number of electrodes required to provide useful vision, and the delivery of information to the implants. Furthermore, we emphasize the possible role of the neuroplastic changes that follow vision loss in the success of this approach. We propose that increased collaborations among clinicians, basic researchers, and neural engineers will enhance our ability to send meaningful information to the brain and restore a limited but useful sense of vision to many blind individuals.

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Section: Delivery Of Information To Implantsmentioning

confidence: 99%

Toward Long-Term Communication With the Brain in the Blind by Intracortical Stimulation: Challenges and Future Prospects

2020

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“…If we compare the current status of visual prostheses with that of cochlear implants (hearing restoration prostheses), there are some interesting observations. Thus, much of the recent successes of cochlear implants has been due to the advancement of signal processing techniques developed over the years and to the development of state-of-the-art multi-channel implants (Boulet et al, 2016;Jain & Vipin Ghosh, 2018;Clark, 2015). However, present visual prostheses only emulate the phototransducer aspect of the retina and lack most of the processing functionality that is found in the visual system.…”

Section: Delivering Of Information To Implantsmentioning

confidence: 99%

Development of visual Neuroprostheses: trends and challenges

Fernández

2018

Bioelectron Med

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Visual prostheses are implantable medical devices that are able to provide some degree of vision to individuals who are blind. This research field is a challenging subject in both ophthalmology and basic science that has progressed to a point where there are already several commercially available devices. However, at present, these devices are only able to restore a very limited vision, with relatively low spatial resolution. Furthermore, there are still many other open scientific and technical challenges that need to be solved to achieve the therapeutic benefits envisioned by these new technologies. This paper provides a brief overview of significant developments in this field and introduces some of the technical and biological challenges that still need to be overcome to optimize their therapeutic success, including long-term viability and biocompatibility of stimulating electrodes, the selection of appropriate patients for each artificial vision approach, a better understanding of brain plasticity and the development of rehabilitative strategies specifically tailored for each patient.

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“…Acoustic parameters (e.g., number of electrodes, pulse rate, etc.) are adjusted to adapt electric stimulation of the impaired ear using acoustic stimulation of the unimpaired ear [13]. The implantation of a single CI was previously recommended in cases of bilateral hearing loss, but indications were extended.…”

Section: Introductionmentioning

confidence: 99%

Factors Predictive of Binaural Hearing Restoration by Cochlear Implant in Single-Sided Deafness

Gersdorff,

Péan,

Camby

et al. 2024

Audiol Neurotol

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Introduction: Cochlear implants (CIs) can restore binaural hearing in cases of single-sided deafness (SSD). However, studies with a high level of evidence in support of this phenomenon are lacking. The aim of this study is to analyze the effectiveness of CIs using several spatialized speech-in-noise tests and to identify potential predictors of successful surgery. Methods: Ten cases underwent standard CI surgery (MEDEL-Flex24). The speech-in-noise test was used in three different spatial configurations. The noise was presented from the front (N0), toward the CI (NCI), and toward the ear (Near), while the speech was always from the front (S0). For each test, the speech-to-noise ratio at 50% intelligibility (SNR50) was evaluated. Seven different effects were assessed (summation, head shadow [HS], speech released of masking [SRM], and squelch for the CI and for the ear). Results: A significant summation effect of 1.5 dB was observed. Contralateral PTA was positively correlated with S0N0-B and S0NCI-B (CIon and unplugged ear). S0N0-B results were positively correlated with S0N0-CIoff (p < 0.0001) and with S0Near-CIoff results (p = 0.004). A significant positive correlation was found between delay post-activation and HS gain for the CI (p = 0.005). Finally, the HS was negatively correlated with the squelch effect for the ear. Conclusion: CI benefits patients with SSD in noise and can improve the threshold for detecting low-level noise. Contralateral PTA could predict good postoperative results. Simple tests performed preoperatively can predict the likelihood of surgical success in reversing SSD.

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Acoustic simulation of cochlear implant hearing: Effect of manipulating various acoustic parameters on intelligibility of speech

Abstract: Pulse rate/channel and 'n of m' contribute maximally to speech intelligibility, at least in simulations of electric hearing.

Cited by 4 publications

References 34 publications

Toward Long-Term Communication With the Brain in the Blind by Intracortical Stimulation: Challenges and Future Prospects

Toward Long-Term Communication With the Brain in the Blind by Intracortical Stimulation: Challenges and Future Prospects

Development of visual Neuroprostheses: trends and challenges

Factors Predictive of Binaural Hearing Restoration by Cochlear Implant in Single-Sided Deafness

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