A filtering model for efficient rendering of the spatial image of an occluded virtual sound source
- Rendering realistic spatial sound imagery for complex virtual environments must take into account the effects of obstructions such as reflectors and occluders. It is relatively well understood how to calculate the acoustical consequence that would be observed at a given observation point when an acoustically opaque object occludes a sound source. But the interference patterns generated by occluders of various geometries and orientations relative to the virtual source and receiver are computationally intense if accurate results are required. In many applications, however, it is sufficient to create a spatial image that is recognizable by the human listener as the sound of an occluded source. In the interest of improving audio rendering efficiency, a simplified filtering model was developed and its audio output submitted to psychophysical evaluation. Two perceptually salient components of occluder acoustics were identified that could be directly related to the geometry and orientation ofRendering realistic spatial sound imagery for complex virtual environments must take into account the effects of obstructions such as reflectors and occluders. It is relatively well understood how to calculate the acoustical consequence that would be observed at a given observation point when an acoustically opaque object occludes a sound source. But the interference patterns generated by occluders of various geometries and orientations relative to the virtual source and receiver are computationally intense if accurate results are required. In many applications, however, it is sufficient to create a spatial image that is recognizable by the human listener as the sound of an occluded source. In the interest of improving audio rendering efficiency, a simplified filtering model was developed and its audio output submitted to psychophysical evaluation. Two perceptually salient components of occluder acoustics were identified that could be directly related to the geometry and orientation of a simple occluder. Actual occluder impulse responses measured in an anechoic chamber resembled the responses of a model incorporating only a variable duration delay line and a low-pass filter with variable cutoff frequenc…
Author: | William L. Martens, Jens HerderORCiDGND, Yoshiki Shiba |
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Fachbereich/Einrichtung: | Hochschule Düsseldorf / Fachbereich - Medien |
Hochschule Düsseldorf / Fachbereich - Medien / Sound and Vibration Engineering | |
Hochschule Düsseldorf / Fachbereich - Medien / Creative Media Production and Entertainment Computing | |
Document Type: | Conference Proceeding |
Year of Completion: | 1999 |
Language of Publication: | English |
Publisher: | Acoustical Society of America, European Acoustics Association |
Place of publication: | Berlin |
Parent Title (English): | 137th Regular Meeting of the Acoustical Society of America and the 2nd Convention of the European Acoustics Association |
Tag: | audio rendering; first-order reflection; human perception; occluder |
Licence (German): | keine Lizenz - nur Metadaten |
Release Date: | 2019/02/15 |