Other research projects

The Effect of Hearing Loss on Sound Texture Perception

Oliver Scheuregger, Research Assistant

Sound textures offer an ecologically valid means of probing the auditory system, whose statistics are shaped by auditory processes. Previous studies have already explored perception of sound textures in normal hearing listeners, however no work has investigated how hearing impaired listeners perceive textures. This project will be a direct extension of his master's project, in which Oliver measured sound texture identification and discrimination performance in normal, impaired and aged listeners. The goal is to investigate if sound textures may be used to better understand and diagnose differences between normal hearing and hearing impaired listeners, with the ultimate goal of aiding in the development of new compensation strategies.

New Frameworks for Communication and Virtual Reality Research

Alejandro Saurí Suárez, Research Assistant

Alex is working in two main streams:
One of the streams corresponds to building a new laboratory for studying communication behaviour. The increasing demand of virtual communication, and the general feeling that current video chat technologies do not transmit the same information as in “real” communication, require a better understanding of what “real” communication means. Thus, there is a need to understand what information are needed for successful communication. To define communication success/failure, outcome measures need to be developed. Such measures can include acoustic features of speech as well as head-motion or eye-gaze, when having a conversation.
The other stream corresponds to creating a general framework for perceptual research in virtual reality. Virtual reality is becoming more commonly used for auditory and multimodal perceptual research (e.g., sound source localization). Therefore, a standard application and protocol is required that allows researchers to easily integrate both visual information and interaction systems. This stream will extend on previous work carried out in the Audio-Visual Immersion Lab (AVIL).

Assessment of communication failure and success in realistic scenarios

Ingvi Örnólfsson, Research Assistant

"I got my master’s degree from Hearing Systems in February and started as a research assistant on April 1st. I will be working with Alex, Axel and others on designing and setting up a new lab for studying communication in realistic scenarios. My focus will be on coming up with measures of success in these scenarios and ensure that the lab is properly equipped to capture these measures. The project is set to finish by the end of the year."

 

Charlotte Sørensen, Research Assistant

Charlotte is primarily working with the audiological
and electrophysiological studies in UHEAL (Uncovering Hidden Hearing Loss)

 

                                                                                                                                                            Borgný Súsonnudóttir Hansen, Student Assistant

Borgný is a student assistant at Hearing Systems, collecting data on young normal-hearing, older normal-hearing and hearing-impaired participants. At the moment, Borgný works on Jonathan Regev’s PhD project ‘Measures and computational models of amplitude modulation processing and perception in hearing-impaired listeners’.

The Effects of Context for Speech Perception in Hearing-Impaired Listeners

Stine Bech Petersen, Research Assistant

From behavioral studies it has been argued that hearing-impaired listeners rely more on semantic or contextual cues than their normal hearing counterparts for successful speech perception.

These claims remain to be proven in electrophysiological investigations of speech perception and the underlying neural processes of the behavioral results are therefore not understood. Stine investigated these processes using EEG and regression-based modelling in her master’s thesis and achieved promising results. She is therefore now working on extending these results to uncover perspectives for future research within this field.  

Elisabeth Koert, research intern

Elisabeth is currently doing a research internship at Hearing Systems supervised by Bastian Epp with the goal to develop a PhD project proposal. The general idea is to investigate if a change in the stimulus shape can improve the performance of the electrical auditory nerve stimulation used in cochlear implants. The first step will be to find feasible alternative pulse shapes using computer simulations by taking the biophysical properties and dynamics of the auditory nerve into account. The neuronal responses to these shapes could later be investigated in mice via electrophysiological experiments and psychoacoustic tests with humans subjects could be used to determine changes in perception.