“隐声斗篷”是一种新型的隔音材料,它能使入射声波沿斗篷表面无反射地绕行,从而对斗篷保护下的物体产生“隐声”效果。美国杜克大学的Steven Cummer博士等人在研究中发现光学隐身的数学原理同样适用于声波,从而提出了隐声斗篷 “Hidden Cloak ” is a new type of sound insulation material that enables incident sound waves to bypass the surface of the cape without reflection and thus produces a “hidden sound” effect on objects protected by the cape. Steven Cummer, Ph.D., of the Duke University in the United States, found that the mathematical principle of optical stealth also applies to sound waves, so as to propose a hidden cloak