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TitleBeamforming synthesis of binaural responses from computer simulations of acoustic spaces
Publication TypeJournal Article
Year of Publication2008
AuthorsPoletti, M.A., and Svensson U.P.
JournalJournal of the Acoustical Society of America
Pagination301 - 315
Date Published2008
ISSN00014966 (ISSN)
KeywordsAccuracy, Acoustic arrays, Acoustic fields, Acoustical Society of America (ASA), acoustics, Amplifiers, article, Audio bandwidth, Auralization, Axisymmetric, Beam forming, Beamforming synthesis, binaural hearing, Computational methods, computer model, computer simulation, Curve fitting, data base, Data sets, Grid points, head, Head-Related Transfer Function (HRTF), Hearing, High accuracy, Humans, Individual (PSS 544-7), Interference suppression, Least squares (LS), Least squares approximations, Low frequency (LF), microphone, Models, Theoretical, Numerical modelling, priority journal, Psychophysics, Rectangular grids, Set theory, Solid spheres, Sound fields, sound pressure, Sound pressures, Spherical array, Subjective assessments, Transfer functions, Ultrasonics
AbstractAuditorium designs can be evaluated prior to construction by numerical modeling of the design. High-accuracy numerical modeling produces the sound pressure on a rectangular grid, and subjective assessment of the design requires auralization of the sampled sound field at a desired listener position. This paper investigates the production of binaural outputs from the sound pressure at a selected number of grid points by using a least squares beam forming approach. Low-frequency axisymmetric emulations are derived by assuming a solid sphere model of the head, and a spherical array of 640 microphones is used to emulate ten measured head-related transfer function (HRTF) data sets from the CIPIC database for half the audio bandwidth. The spherical array can produce high-accuracy band-limited emulation of any human subject's measured HRTFs for a fixed listener position by using individual sets of beam forming impulse responses. © 2008 Acoustical Society of America.

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