To investigate the perceptual effects of simplified acoustic room representations in position-dynamic binaural synthesis, a set of acoustic impulse responses has been measured in a relatively dry listening laboratory and a considerably more reverberant seminar room of similar size. The same arrangement of nine listening positions in equal distances of 25 cm, forming a 2 m-line for listener translation was realized in both rooms, allowing for comparison. A loudspeaker was placed in front and at the side of the translation line, facing towards it and rotated by 180°, facing away from the line. Binaural room impulse responses (BRIRs) were measured with a Kemar 45b head-and-torso-simulator for each of the source-receiver constellations for a full 360° rotation with an azimuth resolution of 4°. This new data set revises and extends a previously published data set by repeating the previous measurements, additionally considering listening positions behind the directional sound sources and providing spatial room impulse responses (SRIRs) to allow for detailed physical analysis of the local physical properties at each of the listening positions for each of the source constellations. This paper documents the measurement process, presents the results of the physical analysis and discusses them in relation to perceptual effects observed in previous psychoacoustic studies.
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