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Implementation and evaluation of auditory models for sound localization

Authors Egger, K.
Year 2011
Thesis Type Audio Engineering project
Topic Psychoacoustics
Abstract For sound localization the human auditory system uses binaural information like interaural time difference (ITD) and level difference (ILD) as well as spectral cues. The information can be described by individual head-related transfer-functions, HRTFs. They represent the spectral characteristics of the filtering process of an incoming soundwave by head, pinna and torso. The processing of this information in the auditory system still cannot be fully explained. Hence the influence of several parameters on human perception is studied with the help of psychoacoustic experiments. However, big variation in system parameters results in great expenses of time and money. Therefore auditory models which aim in modelling response patterns of human listeners are used. The aim of the project is to combine two existing auditory models (Langendijk and Bronkhorst, 2002 and Lopez-Poveda and Meddis, 2001) and integrate the resulting one in the Auditory Modelling Toolbox (AMT) for MATLAB. The resulting model has been evaluated with already existent data from various sound localization experiments.
Supervisors Majdak, P.