Stealth rubber coating could make submarines nearly invisible to sonar

Computer simulations found that a material made from three layers of rubber could absorb most frequencies used for sonar, which if affixed to a submarine would make it difficult to detect

Stealth rubber coating could make submarines nearly invisible to sonar
Computer simulations found that a material made from three layers of rubber could absorb most frequencies used for sonar, which if affixed to a submarine would make it difficult to detect