A binaural model that uses head-movements to evaluate acoustical spaces

Abstract

Binaural models have a long tradition in the instrumental analysis of acoustical spaces. Room acoustical parameters such as the Binaural Quality Index (BQI) are derived directly from the measured Binaural Room Impulse Response (BRIR) of a concert space. The BRIRs are measured using an artifical head with a fixed head position and consequently cannot show the effect of head movements, which are essential for human listening performance. Based on a novel model architecture that utilizes head movements [Braasch et al., 2011, J. Acoust. Soc. Am. 129, 2486 (A)] and psychoacoustic experiments, the effect of head movements on the perceptual judgment of room acoustical parameters will be discussed. In addition, BRIRs for different azimuth angles are calculated from higher-order ambisonic microphone data that were obtained in several concert halls in the Northeastern United States. [Clapp et al., 2011, J. Acoust. Soc. Am. 130, 2418 (A)]. It will be demonstrated how the standard acoustical parameters change with head orientation and how dynamic head-movement cues can be utilized to better predict the perceived quality of concert spaces.

Head tracking and source localization in reverberant cocktail party scenarios

“…Therefore, one goal of this study is to provide the psychophysical foundation for a binaural model that can account for head movements. Such work has already begun with the author in conjunction with Braasch on a model that can resolve front-back confusions [5], [6].…”