Cluster of Excellence
CASA for Hearing Devices
In everyday life we are exposed to situations where a multiple number of sound sources reach our ears simultaneously. Normal-hearing persons are able to focus on a single sound source and supress the others. Bregman termed this ability as "Auditory Scene Analysis." Computational Auditory Scene Analysis (CASA) refers to a field of research focused on the development of algorithms to solve the problem computationally. CASA achieves to extract the signal of interest from a mixture of various signals in the output signal from a microphone while ignoring the other signals. Since hearing-impaired persons find it often more difficult to handle scenes with a multiple number of sound sources, we want to use CASA to facilitate managing such scenes for hearing aid users.
DFG COLLABORATIVE RESEARCH CENTER - SFB 1330
Project B2 - Computational Auditory Scene Analysis algorithms for improving speech communication in complex acoustic environments
The long-term goal of this project is to achieve a breakthrough in the theoretical foundation and realization of auditory-inspired algorithms for analysing and processing speech in complex acoustic conditions, in order to fundamentally improve speech communication in these conditions for people with hearing difficulties.
Main research questions are to determine the most promising auditory-inspired and technical processing principles, to identify the possibilities of exploiting machine learning techniques, to optimally integrate the different processing principles and to realize demonstrators that optimally support specific applications such as hearing aids, cochlear implants and assistive listening devices.
Audio content is commonly reproduced over loudspeakers in reverberant and noisy environments. This often leads to non-optimal reproduction conditions. Impairments can both be with respect to the spatial and timbre fidelity of the reproduction as well as with respect to speech intelligibility. This project will focus on robust methods for compensating for the non-optimal acoustical conditions and hearing capabilities of the listeners that can be applied in multiple scenarios.
Subproject - WP3 Human response to Sonic Boom
Task 3.3: Indoor human response to sonic boom
In this EU-funded H2020-project, the perception of new sonic boom signatures is investigated which can be used as a basis to derive guidelines for acceptable levels of sonic booms.
AiF / iGF Project
Project - Perceptional NVH-Aspects of Downspeeding
(Empfindungsgrößen Niedertouriges Fahren)
This iGF/BMWi funded project, NVH-aspects of downspeeding in combustion engines are investigated with a focus on R-Roughness. This also includes the influence of simultaneous vibrations on the perceived sound quality.
AiF / iGF Project
Project - The characterization of the acoustic quality of fans with the preference equivalent level – development of a psycho-acoustically motivated calculation method
(Die Kennzeichnung der akustische Güte von Ventilatoren mit dem guteäquivalenten Pegel – Entwicklung eines psychoakustisch motivierten Berechnungsverfahrens)
In this iGF/BMWi funded project, the perception of ventilator and fan noise is investigated and an algorithm for the prediction of quality equivalent levels is developed.
DFG Research Unit
Subproject - Models of room acoustical perception
The aim of this project is to survey the connection of physical room acoustical parameters and the attributes of room acoustical perception.
DFG Collaborative Research Center - Transregio 31
Subproject - Binaural Cocktail-Party processing: the role of perceptual organisation and release from masking
The main goal of this project is to investigate the role of top-down and bottom-up processing in binaural cocktail party settings. Bottom-up processing of binaural cues relates to the well-known binaural release from masking. Top-down processing relates to the contribution of binaural localization cues to auditory stream segregation which allows for selectively attending to one target only. Up till now there is little research that directly compares the contributions of these two aspects to binaural cocktail party processing. This project will use a new stimulus paradigm to get a better understanding of the contribution of both cues to the cocktail-party effect.