We have a new peer reviewed publication in Trends in Hearing about “Amplitude Growth Functions of Auditory Nerve Responses to Electric Pulse Stimulation With Varied Interphase Gaps in Cochlear Implant Users With Ipsilateral Residual Hearing”, by Marina Imsiecke, Andreas Büchner, Thomas Lenarz and Waldo Nogueira.
The study investigates neural hearlth in EAS subjects, i.e. subjects with residual hearing in the apex of the cochlea. Using responses of the auditory nerve (IPG effect), this study indicates better neural health in the apex of the cochlea compared to the medial cochlear region in EAS users. Here the link: https://pubmed.ncbi.nlm.nih.gov/34181493/ .
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And another one!
Florian Langner, Andreas Büchner and Waldo Nogueira also recently published a paper about the adaptive dynamic compression algorithm Voice Guard from Oticon Medical and compared it to a standard front-end AGC in terms of speech understanding perfomance and various objective measures. Find the open access paper here: https://doi.org/10.1177/2331216520970349 We have a new paper in Hearing Research by Florian Langner, Colette McKay, Andreas Büchner and Waldo Nogueira about loudness perception with simulatenous stimulation including a practical model that can predict loudness from said form of stimulation.
Find the paper here: https://doi.org/10.1016/j.heares.2020.108091 Find the model on GitHub here: https://github.com/APGDHZ/LoudnessModel Together with Prof. Simon Doclo (University of Oldenburg) we are organizing a session on "Audio and Neural Signal Processing for Hearing Devices" at the ICASSP 2020 conference. The ICASSP will be organized as a virtual conference this year. [session]
Within the special session we have a contribution on "Toward Decoding Selective Attention from single trial EEG in Cochlear Implant Users based on Deep Neural Networks". [paper] [code] https://l.feathr.co/ICASSP-2020_Waldo-Nogueira We published two papers in JASA about electrocochleographic (ECochG) responses in cochlear implant users with residual acoustic hearing in the same ear. We used ECochG to investigate interaction effects between electric and acoustic hearing. Part of the interactions can be expained by peripheral mechanisms at the level of the cochlea. Morevover the interaction effects seem to be similar at loud and soft levels.
Here the links to the publicationss:
Next week from Monday until Wednesday (18th-20th of November) we are organizing a mini-symposim on Neural Interfaces wihtin the ICBT2019 conference in Hannover.
During the ICBT other super interesting mini-symposiums and keynote speakers related to Auditory Implants (Prof. T. Lenarz) and Mechanics of Hearing (Prof. H. Maier) will be organized. You are very welcome to attend! More information in the links below: http://www.icbt19.uni-hannover.de/mini-symposia/ Recent advances in engineering, computing and neuroscience are contributing to novel approaches to recover human senses and to treat neurological and mental disorders as well as understanding various function of the brain. These new approaches are based on the ability to stimulate and record neural activity with increased accuracy. New technologies including stimulation and recording devices as well as computational models permit the expansion and understanding of neural interfaces, devices that interact with the nervous system to restore or enable sensory and motor function. Examples of successful neural interfaces include cochlear implants for hearing impaired people, retinal implants for the blind, and devices for deep brain stimulation (DBS) for individuals with Parkinson’s disease, essential tremor and other motor symptoms. This session will include review studies and novel contributions in the field of retinal, cochlear and central auditory implants, deep brain stimulation implants as well as cortical stimulation and recording devices. Bringing researchers together from different disciplines working in different applications will bring synergistic effects and offer the opportunity to learn from each other’s field. Computational models may include:
We have a new publication (link) in our group by Marina Imsiecke investigating the interactions between electric and acoustic stimulation in cochlear implant subjects that retain residual hearing after implantation and its relation to speech outcomes. Moreover we designed a new EAS fitting map that was assessed in a chronic study in CI users.
Here the main conclusions from the study: 1) The study confirmed the interaction between electric and acoustic stimulation in a psychoacoustic masking experiment. (2) The overlap fitting yielded poorer speech reception performance in stationary noise especially in subjects with strong masking. (3) The newly developed UNMASKfit strategy yielded similar speech reception thresholds with an enhanced acoustic benefit, while at the same time reducing the electric stimulation. This could be beneficial in the long-term if applied as a standard fitting, as hair cells are exposed to less possibly adverse electric stimulation. In this study, the UNMASKfit allowed the participants a better use of their natural hearing even after 1 month of adaptation." Presentation at the instituto nacional de rehabilidation (INR) IN mexico city september 201928/9/2019 Waldo Nogueira gave three talks at the Insituto Nacional de Rehabilitación during the conference "Segundo curso internacional de atención con calidad al paciente con patología audiológica y vestibular" in Mexico City. The presentations in spanish language are listed below with corresponding links: 1) Introducción al centro alemán de la audición de Hannover; Estrategias de codificación y adaptación en implantes cocleares [pdf] 2) Evaluación de la inteligibilidad del habla con implante coclear bilateral y en pacientes bimodales [pdf] 3) Estimulación Eléctrico-Acústica: Evaluación de la inteligibilidad del habla y su relación con la interacción electrico-acústica [pdf] We have two new journal publications on decoding selective attention for CI users from high density EEG and using a mobile cEEGrid device.
The links to the publications can be found here:
We are presenting 1 talk and four posters at the conference.
The talk is about decoding selective attention in CI users. You can find the slides here. Posters from Tom Gajecki on Binaural NofM sound coding strategy, Benjamin Krüger on ECochG interaction, Florian Langner on automatic compression and Waldo Nogueira on contralateral masking. |
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