DEVICE METHOD AND GRID BATTERY FOR PROTECTION PREMISES AGAINST EXTERNAL NOISE Russian patent published in 1999 - IPC

FIELD: acoustic equipment. SUBSTANCE: method involves use of battery of acoustic detectors, which receive external noise E and spaced from premise under protection by distance A and spaced from battery of acoustic oscillation sources by distance B, which is less than distance A. Sources of acoustic oscillations receive signals S, which are designed as sums of double products of convolutions of function Ej(t) by two functions f_ij(t) and g_ik(-t), which are directly derived from pulse response signals, which are received simultaneously by two types of acoustic detectors. The first type of acoustic detectors receives acoustic pulses which are emitted by source which are located in substitute battery which embraces above-mentioned premise. Acoustic detectors of second type are located in same points in space as above-mentioned sources and receive acoustic signals which are emitted by above-mentioned sources. EFFECT: increased noise protection. 8 cl, 1 dwg