Toward orthogonal non-individualised head-related transfer functions for forward and backward directional sound: cluster analysis and an experimental study
Individualised head-related transfer functions (HRTFs) have been shown to accurately simulate forward and backward directional sounds. This study explores directional simulation for non-individualised HRTFs by determining orthogonal HRTFs for listeners to choose between. Using spectral
features previously shown to aid forward-backward differentiation, 196 non-individualised HRTFs were clustered into six orthogonal groups and the centre HRTF of each group was selected as representative. An experiment with 15 listeners was conducted to evaluate the benefits of choosing between
six centre-front and six centre-back directional sounds rather than the single front/back sounds produced by MIT-KEMAR HRTFs. Sound localisation error was significantly reduced by 22% and 65% of listeners reduced their front-back confusion rates. The significant reduction was maintained when
the number of HRTFs was reduced from six to five. This represents a preliminary success in bridging the gap between individual and non-individual HRTFs for applications such as spatial surround sound systems. Statement of Relevance:Due to different pinna shapes, directional sound stimuli generated
by non-individualised HRTFs suffer from serious front-back confusion. The reported work demonstrates a way to reduce front-back confusion for centre-back sounds generated from non-individualised HRTFs.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
Document Type: Research Article
Department of Industrial Engineering and Logistics Management, Hong Kong University of Science and Technology, Hong Kong, PRC
Department of Computer Science and Engineering, Hong Kong University of Science and Technology, Hong Kong, PRC
Institut fur Kommunikationsakustik, Ruhr-Universitat Bochum, Bochum, Germany
Rehabilitation Engineering Center, Hong Kong Polytechnic University, Hong Kong, PRC
June 1, 2010
More about this publication?