Evaluation of a new stereophonic reproduction method with moving “sweet spot” using a binaural localization model

Authors

  • Sebastian Merchel Chair of Communication Acoustics, Dresden University of Technology, 01062 Dresden, Germany
  • Stephan Groth Chair of Communication Acoustics, Dresden University of Technology, 01062 Dresden, Germany

Abstract

This paper describes the use of a binaural localization model to evaluate the utility of a new stereophonic play back system. The system is designed to adjust the “sweet spot” to a moving listener position in real time. This is done by adaptively manipulating time delay and level differences between the loudspeaker signals in reference to the center of the listeners head. The localization in such a system is one of the most important quality parameters. It is investigated on the basis of a binaural model after Braasch [Communication Acoustics ed. J. Blauert, pp. 75-103 (2005)]. The modeled localization angle is compared to the target angle for different phantom source and listener positions. The absolute value of the difference between modeled localization angle and target angle to phantom source is plotted and discussed using “vector maps” and “quality maps”. The results indicate that an adjustment of signals corresponding to the center of the listener’s head improves the localization over the whole listening area. Some localization error remains, which can be estimated and compensated for using the binaural model. A real time implementation of the system con rms the modeled results.

References

Bauer, B. (1960). “Broadening the Area of Stereophonic Perception,” J Audio Eng Soc 8, 91-94.

Braasch, J. (2005). “Modelling of binaural hearing,” in Communication Acoustics edited by J. Blauert (Springer Verlag), pp. 75-103.

Kyriakakis, C., Holman, T., Lim, J. S., Hong, H., and Neven, H. (1998). “Signal Processing, Acoustics, and Psychoacoustics for High Quality Desktop Audio,” J Vis Commun Image Represent 9, 51-61.

Lipshitz, S. P. (1986). “Stereo Microphone Techniques: Are the Purists Wrong?,” J Audio Eng Soc 34, 716-744.

Merchel, S., and Groth, S. (2009). “Analysis and Implementation of a Stereophonic Play Back System for Adjusting the ‘Sweet Spot’ to the Listener’s Position,” in Proceedings of 126th AES Convention (Munich, Germany).

Additional Files

Published

2009-12-15

How to Cite

Merchel, S., & Groth, S. (2009). Evaluation of a new stereophonic reproduction method with moving “sweet spot” using a binaural localization model. Proceedings of the International Symposium on Auditory and Audiological Research, 2, 223–232. Retrieved from https://proceedings.isaar.eu/index.php/isaarproc/article/view/2009-23

Issue

Vol. 2 (2009): Binaural Processing and Spatial Hearing

Section

2009/2. Perceptual measures and models of spatial hearing

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