Section A - Principles
Section A deals with the basics of speech perception. It comprises five sub-projects, ranging from speech intelligibility and speech perception in complex situations to diagnosis and hearing aid fitting.
In many situations human speech communication is considerably affected due to hearing impairment and interfering sounds. This project will assess speech intelligibility and listening effort and will compare the perceptual data to model predictions for evaluating sound presentation and speech enhancement methods developed in the CRC.
In complex realistic auditory scenes it can be expected that listeners are only able to sub-optimally extract and compare information of multiple sound sources depending on factors like duration, spectral content, spatial position, and reverberation. This project aims at developing a generalized model for auditory perception and quality in complex scenes taking into account a perceptual decomposition of the scene into auditory objects.
The goal of this project is to provide a software tool to simulate, i.e., virtually perform, speech recognition of listeners with impaired hearing in complex communication environments. For this, a robust automatic speech recognition system is employed that does not require prior information about empirical speech recognition performance.
This project aims at understanding and controlling the key factors in acoustic stimulation and simulation techniques relevant for naturally sounding presentation to humans in a way that avoids any mismatch be-tween the intended and the psychoacoustically determined impression of sound quality, loudness, and other attributes.
The long-term goal of this project is to establish a model-based theory-driven framework for internationally compatible hearing diagnostics and rehabilitation in real life-matched scenarios. In order to close the gap between the laboratory and real life conditions this project will focus on the extension of patient performance measurements by including audio and audio-visual measurements in acoustically complex scenes simulating dynamic real life scenarios.