Projects

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Signal processing for hearing aids motivated by auditory perception. KU Leuven

Marc Moonen
ESAT - STADIUS, Stadius Centre for Dynamical Systems, Signal Processing and Data Analytics, Research Group Experimental Oto-rhino-laryngology
The major problems of hearing aid users are understanding speech in background noise, a reduced spatial hearing and the occurrence of acoustic feedback between the receiver and the microphone of the hearing aid. This project envisages the design of objective evaluation procedures and signal processing techniques that are based on models of auditory perception in normal hearing and hearing impaired subjects. In order to increase the robustness of ...

Distributed signal processing algorithms for auditory attention detection with chronic EEG sensor networks KU Leuven

Alexander Bertrand
ESAT - STADIUS, Stadius Centre for Dynamical Systems, Signal Processing and Data Analytics
Electroencephalography (EEG) is a non-invasive neuromonitoring technique, with potential use for chronic daily-life monitoring. A variety of miniature EEG devices have been proposed for chronic use, but these typically measure only a few EEG channels over a highly localized area, which is insufficient for many potential chronic-EEG applications. In this project, we aim to overcome this problem by deploying a multitude of such miniature EEG ...

Distributed signal processing algorithms for wireless EEG sensor networks with applications in auditory-based brain-computer interfaces. KU Leuven

Alexander Bertrand
ESAT - STADIUS, Stadius Centre for Dynamical Systems, Signal Processing and Data Analytics
Electroencephalography (EEG) is a cheap and non-invasive neuromonitoring technique to measure electrical potentials generated by the brain. Recently, the concept of a wireless EEG sensor network (WESN) has been proposed, in which the head is covered with a multitude of EEG nodes with facilities for local signal processing (SP) and wireless communication. Since they are amenable to extreme miniaturization and low-power system design, it is ...

Listening with age: disentangling peripheral and cortical processing in the aging auditory system. KU Leuven

Astrid van Wieringen
Research Group Experimental Oto-rhino-laryngology
In daily life most speech communication information has to be captured in non-optimal acoustical environments and in the presence of interfering sound sources. In the auditory system, the complex speech signal needs to be analyzed acoustically and neurally, separated from the noise, and mapped to phonemes and words. This processing is found to be significantly affected by age. The elderly have more difficulties to follow the rapid temporal ...

Development of a unified speech processing strategy for combined electric and acoustic auditory stimulation. KU Leuven

Jan Wouters
Research Group Experimental Oto-rhino-laryngology, ESAT - STADIUS, Stadius Centre for Dynamical Systems, Signal Processing and Data Analytics
Cochlear implants (CIs) can restore speech perception of deaf subjects by electrical stimulation of the auditory nerve. Because CI users sometimes perform better than severely hearing impaired subjects with a hearing aid (HA), implantation criteria are changing, leading to a steeply growing population of patients with a CI in one ear and residual hearing, used with a HA, in the other. This is called bimodal stimulation. Currently more than half ...

Development of a unified sound processing strategy for combined electric and acoustic auditory stimulation KU Leuven

Tom Francart
Research Group Experimental Oto-rhino-laryngology

A hearing aid restores hearing by sound amplification, while a cochlear implant is surgically implanted and restores hearing by electrical stimulation of the auditory nerve. An increasingly common solution to severe hearing loss is a "bimodal system": a cochlear implant in one ear and a hearing aid in the other. By giving the ability to hear with two ears – so-called "binaural hearing" – this set-up could in theory allow its users to figure ...

Auditory temporal processing deficits in dyslexia: detection and compensation KU Leuven

Jan Wouters
Research Group Experimental Oto-rhino-laryngology, Parenting and Special Education

The etiology of developmental dyslexia remains widely debated. One theory postulates that the reading and spelling problems in dyslexia originate from reduced sensitivity to temporal auditory information. This low-level deficit is thought to provoke a cascade of effects, including underspecified phonological representations and inaccurate speech perception. Until now, most studies focused on the psychophysical investigation of this deficit. ...

In search for neurophysiological markers for an auditory processing deficit in dyslexia. KU Leuven

Jan Wouters
Research Group Experimental Oto-rhino-laryngology, Parenting and Special Education
in het Engels (max. 15 regels): The etiology of developmental dyslexia remains widely debated. One theory postulates that the reading and spelling problems in dyslexia originate from reduced sensitivity to the temporal envelope of speech. This low-level auditory deficit is thought to provoke a cascade of effects, including underspecified phonological representations and inaccurate speech perception. However, neural evidence for the presence of ...

In search of neurophysiological markers for an auditory processing deficit in dyslexia. KU Leuven

Jan Wouters
Institute for International Law

The etiology of developmental dyslexia remains widely debated. One theory postulates that the reading and spelling problems in dyslexia originate from reduced sensitivity to temporal auditory information. This low-level deficit is thought to provoke a cascade of effects, including underspecified phonological representations and inaccurate speech perception. Until now, most studies focused on the psychophysical investigation of this deficit. ...

Distributed digital signal processing algorithms for highdensity wireless EEG sensor networks with application to ASSR based objective hearing thresholds estimation KU Leuven

Marc Moonen
ESAT - STADIUS, Stadius Centre for Dynamical Systems, Signal Processing and Data Analytics

Electroencephalography (EEG) is used to analyze brain activity and detect brain responses to specific stimuli. It offers a high temporal resolution versus a low spatial resolution. A higher spatial resolution may be obtained by adopting a higher electrodes density together with powerful digital signal processing (DSP) algorithms. However, hundreds of electrodes then have to be wired to an output device that collects and processes all ...