The correct acoustical localization of a signal source in delayed sound-reinforcement systems is often a problem because high-sound energy and high-frequency contents in the signal lead to localization to the nearest loudspeaker despite the existence of the precedence effects. By reducing the high frequencies for the delayed loudspeakers, localization of the sound source will be improved without affecting intelligibility. With modern digital signal-processing equipment, the required delay and equalization is done easily and is cost effective. The performance of the system, measurement, and the result of listening tests in the theater room are presented.
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https://aes2.org/publications/elibrary-page/?id=6304
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