Adaptively Adjusting the Stereophonic Sweet Spot to the Listener’s Position
Sebastian Merchel, Stephan Groth · Journal of the Audio Engineering Society · 2010
A stereophonic playback system designed to adjust the sweet spot to the listener's position is presented. The system includes an optical face tracker, which provides information about the listener's x―y position. The loudspeaker signals are manipulated in real time in order to move the sweet spot. The stereophonic perception with an adjusted sweet spot is theoretically investigated on the basis of several models of binaural hearing. The results indicate that an adjustment of signals corresponding to the center of the listener's head does improve localization over the entire listening area. Nevertheless, some localization error remains because of asymmetric signal paths for off-center listening positions, which can be estimated and compensated for.