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Virtual Acoustics

Vorländer M.

Archives of Acoustics

2014

Vol. 39, No. 3

307--318

Virtual Reality (VR) systems are used in engineering, architecture, design and in applications of biomedical research. The component of acoustics in such VR systems enables the creation of audio-visual stimuli for applications in room acoustics, building acoustics, automotive acoustics, environmental noise control, machinery noise control, and hearing research. The basis is an appropriate acoustic simulation and auralization technique together with signal processing tools. Auralization is based on time-domain modelling of the components of sound source characterization, sound propagation, and on spatial audio technology. Whether the virtual environment is considered sufficiently accurate or not, depends on many perceptual factors, and on the pre-conditioning and immersion of the user in the virtual environment. In this paper the processing steps for creation of Virtual Acoustic Environments and the achievable degree of realism are briefly reviewed. Applications are discussed in examples of room acoustics, archeological acoustics, aircraft noise, and audiology.

Virtual acoustics : opportunities and limits of spatial sound reproduction

Vorländer M.

Archives of Acoustics

2008

Vol. 33, No. 4

413-422

Virtual Acoustics is part of the emerging field of "Virtual Reality". The technology for creating a Virtual Reality, VR, for wide variety of applications in university and industry has been developed in the last decade. Mostly VR is understood as a tool for 3D visualization, rather than for spatial audio or room acoustics. Nevertheless an important requirement of VR is the multimodal approach which includes vision, sound, tactile and haptic stimuli. The process of creating a physical stimulus based on computer data is called "rendering". The development of rendering and reproduction of acoustic stimuli in VR is now at a stage where integration of 3D sound is feasible by using PCs. This applies to multi-channel binaural synthesis as well as to full room-acoustic simulation algorithms and to various applications of 3D sound stimuli for audiology, neuropsychology or any other application in acoustics and noise control.