Jn. Guo et J. Pan, FURTHER INVESTIGATION ON ACTIVELY CREATED QUIET ZONES BY MULTIPLE CONTROL SOURCES IN FREE-SPACE, The Journal of the Acoustical Society of America, 102(5), 1997, pp. 3050-3053
Further research on the quiet zones created in the free space, using m
ultiple control sources and error microphones located in two parallel
planes, indicated that there also exists a range of optimal spacing fo
r the control sources and error microphones. Both the computer simulat
ions and experimental results show that the control system can create
the largest quiet zone and suffer the least increase of total sound po
wer output when the control actuators and sensors are arranged within
this optimal range. (C) 1997 Acoustical Society of America.