Testing of Low Frequency Water and Air Sound Active ‎Cancellation Techniques: Problems and Preliminary Results

Belogubtsev E.S., Kirukhin A.V., Kuznetsov G.N., Mikhailov S.G., Pudovkin A.A., Smagin D.A.,  Fedorov V.A.

Active control of low frequency sound vibration is considered. The necessity of solving this problem by active ‎means in consequence of low cancellation effectiveness of passive techniques and means for signals on low ‎frequencies is concluded. The algorithms and techniques development results are discussed for active ‎cancellation of sound signals in water and air medium. The importance of solving this problem to ensure sea ‎objects stealth and maintenance staff environmental safety is concluded. The real opportunity to cancel low ‎frequency discreet components on not less then 8–15 dB and to reduce wide band level on not less then 6…8 ‎dB is demonstrated. It is denoted that discreet frequency components cancellation both increase objects ‎latency hiding and falsify objects classification characteristics.‎

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