Active systems for room acoustics control in auditoria for music,for ezample reverberation enhancement systms,have bene sued for some decades and the number of installatiosn is increasing rapidly.subjective studies have shown that active sysktmes cna be efficient [1].However,the naturalness of the sound field in hals with such systems cna be questionable due to artifacts produced by tsystme,and this may seriously limit the efficiency.
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