It has been demonstrated that acoustic contrast control is one of effective means to maximize the acoustic energy ratio between acoustically bright zone (listener region) and dark zone (elsewhere)1. The control requires to measure transfer functions between input and output of the system. The input can be any signals that feed into the speaker array, and the output is sound pressures at the locations that we want to make bright or dark. However, if there are errors in measuring transfer function due to measurement noises, measurement position offset, or any kinds of disturbances in measurement, the desired performance might be poor. These errors degrade the system performance whose measure is brightness error and contrast error. In this paper, the errors are expressed in terms of magnitudes and phases in general, and we have formulated the performance variation of acoustic brightness/contrast control due to the errors in measuring transfer functions mathematically and evaluated its validity through the simulation results.
|Title of host publication||Proceedings of 16th International Congress on Sound and Vibration 2009, ICSV 2009|
|Publisher||International Institute of Acoustics and Vibrations|
|Publication status||Published - 2009|
|Event||16th International Congress on Sound and Vibration 2009 (ICSV16) - Krakow, Poland|
Duration: 5 Jul 2009 → 9 Jul 2009
|Conference||16th International Congress on Sound and Vibration 2009 (ICSV16)|
|Period||05/07/2009 → 09/07/2009|