Neural entrainment to speech modulates speech intelligibility ?
Date: 23 June 2017, 15:00
Location: UMCG, Panoramazaal, U4.123
Broadcasting link: https://tinyurl.com/23-06-2017-Auditory-Seminar2
Dr. Lars Riecke
Department of Cognitive Neuroscience
Faculty of Psychology and Neuroscience
University of Maastricht
Speech entrainment, the alignment of neural activity to the slow temporal fluctuations (envelope) of acoustic speech input, is ubiquitous in current theories of speech processing. Associations between speech entrainment and acoustic speech signal, behavioral listening task, and speech intelligibility have been observed repeatedly. However, a methodological bottleneck has prevented clarifying whether speech entrainment functionally contributes to speech intelligibility. Here, we addressed this issue by experimentally manipulating speech entrainment in the absence of systematic acoustic and task-related changes with a novel approach that involves stimulating listeners with transcranial currents carrying speech-envelope information. Results from two experiments involving a cocktail party-like scenario and a listening situation devoid of acoustic envelope information show consistently an effect on listeners’ speech-recognition performance, demonstrating a causal role of speech entrainment for speech intelligibility. This finding supports entrainment-based theories of speech comprehension and suggests that transcranial stimulation with speech envelope-shaped currents can be utilized to modulate speech comprehension.
Jeanne Clarke’s submission, “Top-Down Repair of Interrupted Speech in Electro-Acoustic Stimulation,” co-authored with Etienne Gaudrain, is upgraded to a talk at CIAP 2017.
Nawal El Boghdady received a travel grant from CIAP 2017 organization. She will present our collaborative work with Waldo Nogueira and Florian Langner from Hannover Medical Center and co-funded by Advanced Bionics, “Improving speech perception in cocktail-party situations for cochlear implants.”
Leanne Nagels’s submission “Lexical access in cochlear implant users” to AMLaP 2017 is upgraded to a podium talk. The work was supervised by Dr. Anita Wagner and conducted in collaboration with Prof. Roelien Bastiaanse (Neurolinguistics). Congratulations!
Assessment of audiovisual speech recognition in cochlear implant recipients- why and how?
Date: 9 June 2017, 14:00
Location: P3.270 (near KNO Department)
Broadcasting link: https://tinyurl.com/09-06-2017-Auditory-Seminar
Prof. dr. Hartmut Meister
Head Audiology Research
Jean Uhrmacher Institute for Clinical ENT-Research
University of Cologne
In their early days, cochlear implants (CI) served as aids for lip-reading. Due to technical and medical progress and the development of elaborated rehabilitation programs many CI users show near perfect speech understanding without visual cues these days. Nevertheless, audiovisual (AV) speech is still important since visual cues are generally helpful in every-day communication. Thus, assessing different CI-processing schemes or fittings using AV speech reveals high ecological validity. Moreover, CI recipients typically show better lip-reading abilities than their normal-hearing peers and AV integration might be different in these populations.
However, assessing AV speech recognition is not a simple matter since validated speech material is scarce and establishing an AV speech corpus is costly and time-consuming. An alternative approach is using common speech-audiometric material and supplementing the visual modality by applying an avatar.
I will give an overview of our experience with the use of avatars during AV speech assessment, discuss opportunities and limitations and give examples for the implementation in cochlear implant research.
Christina Fuller has won the 2016 Best PhD Thesis Prize from KNO Vereniging (Dutch ENT Society). Congratulations!
Sam van KNO, our NAO robot, joined the lab! Sam is making friends fast with everyone inside and outside the lab.
Our VICI proposal “It takes two to communicate: Voice perception and linguistic content” is accepted! Since it was a group effort a huge congratulations is in order for the entire group. The project will have a fundamental science part where we will study the interactive connection between voice perception and speech communication, and an applied part where we will do so in the context of hearing impairment. We will take advantage of our existing tools, combined under PICKA (Perception of Indexical Cues in Kids and Adults). To top it all, we will also other tools, potentially very much fun and effective, such as using a NAO robot. Stay tuned for exciting new details!
Our symposium proposed in collaboration with Dr. David Landsberger (NYU) was accepted at ARO 2017. The title is “Symposium: Auditory implants: Improving auditory function from pre-processing to peripheral and central mechanisms.”
Dr. Christina Fuller has recently completed her PhD work on music and cochlear implants. Part of her research was on providing music training to cochlear-implant users, to explore what hearing benefits different training approaches may provide to this group. This also lead to a wonderful collaboration with the Prins Claus Conservatorium, where Dr. Robert Harris provided a pilot training to a small group of implant users.
These efforts are featured on De Kennis van Nu: