AES San Francisco 2008
Paper Session P13
Saturday, October 4, 9:00 am — 10:30 amP13 - Spatial Perception
Chair: Richard Duda, San Jose State University - San Jose, CA, USA
P13-1 Individual Subjective Preferences for the Relationship between SPL and Different Cinema Shot Sizes—Roberto Munoz, U. Tecnológica de Chile INACAP - Santiago, Chile; Manuel Recuero, Universidad Politécnica de Madrid - Madrid, Spain; Manuel Gazzo, Diego Duran, U. Tecnológica de Chile INACAP - Santiago, Chile
The main motivation of this study was to find Individual Subjective Preferences (ISP) for the relationship between SPL and different cinema shot sizes. By means of the psychophysical method of Adjustment (MA), the preferred SPL for four of the most frequently used shot sizes, i.e., long shot, medium shot, medium close-up, and close-up, was subjectively quantified.
Convention Paper 7578 (Purchase now)
P13-2 Improvements to a Spherical Binaural Capture Model for Objective Measurement of Spatial Impression with Consideration of Head Movements—Chungeun Kim, Russell Mason, Tim Brookes, University of Surrey - Guildford, Surrey, UK
This research aims, ultimately, to develop a system for the objective evaluation of spatial impression, incorporating the finding from a previous study that head movements are naturally made in its subjective evaluation. A spherical binaural capture model, comprising a head-sized sphere with multiple attached microphones, has been proposed. Research already conducted found significant differences in interaural time and level differences, and cross-correlation coefficient, between this spherical model and a head and torso simulator. It is attempted to lessen these differences by adding to the sphere a torso and simplified pinnae. Further analysis of the head movements made by listeners in a range of listening situations determines the range of head positions that needs to be taken into account. Analysis of these results inform the optimum positioning of the microphones around the sphere model.
Convention Paper 7579 (Purchase now)
P13-3 Predicting Perceived Off-Center Sound Degradation in Surround Loudspeaker Setups for Various Multichannel Microphone Techniques—Nils Peters, Bruno Giordano, Sungyoung Kim, McGill University - Montreal, Quebec, Canada; Jonas Braasch, Rensselaer Polytechnic Institute - Troy, NY, USA; Stephen McAdams, McGill University - Montreal, Quebec, Canada
Multiple listening tests were conducted to examine the influence of microphone techniques on the quality of sound reproduction. Generally, testing focuses on the central listening position (CLP), and neglects off-center listening positions. Exploratory tests focusing on the degradation in sound quality at off-center listening positions were presented at the 123rd AES Convention. Results showed that the recording technique does influence the degree of sound degradation at off-center positions. This paper focuses on the analysis of the binaural re-recording at the different listening positions in order to interpret the results of the previous listening tests. Multiple linear regression is used to create a predictive model which accounts for 85% of the variance in the behavioral data. The primary successful predictors were spectral and the secondary predictors were spatial in nature.
Convention Paper 7580 (Purchase now)