| 摘要 |
1. A device for eliminating the effects of acoustic or mechanical vibrations on a zone to be protected, these vibrations coming from a source, the device comprising a first probe for receiving the vibrations to be eliminated, a second probe located on the source, a narrow filter connected to the output of the second probe, a transducer for generating vibrations which oppose themselves to the vibrations to be eliminated, and processing means for receiving the output signals of the first probe and of the filter, characterized in that the first probe (1, 1') is located upstream of the zone to be protected with respect to the source (AP, AP'), and that the processing means (8) include a group of narrow filters (3a to 3n) connected to the output of the second probe (2, 2'), a group of complex correlators (4a to 4n) for correlating the output signals of the first probe with the signals of each of the narrow filters respectively, and an adder (5) for adding the output signals of the correlators and for delivering the signal for controlling the transducer (HP, AM). |
