Hydrophysics

Hydrophysics

Sonar Designing with the Ability of Acoustical Noise Canceller by Using Adaptive Filter

Document Type : Original Article

Authors
Hamid Amiri Ara 1
Mohammad Akhondi 1
Abolfazl Akbarnia 2
1 Babol Noshirvani University of Technology
2 Malek Ashtar University of Technology
Abstract
Ocean environmental noises are a significant and specific acoustic feature that influence sonar performance. These noises are affected by surface state (like wavy state of the sea, wind speed, etc.), above space of surface, aquatic animals and specially shipping noises. To improve the performance of sonars (acoustic targets detection), use of beam-forming for noise cancelling is not suitable. Because the system can only cover a specific range of environment while all acoustical waves are essential for targets detection. The proposed solution of this paper is utilizing adaptive filter for cancelling acoustical noise from sonar targets echoes. Since environmental noise is very effective on sonar systems, using the proposed method is very essential to improve the performance of the system. Simulation results show that the proposed sonar system can completely discriminate received acoustical waves and environmental noise and increase probability of detection.
Keywords
acoustical active noise canceller
adaptive filter
sonar system
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  • Receive Date 17 March 2019
  • Revise Date 16 June 2019
  • Accept Date 16 June 2019