【實用工具app】InvasionPlan|最夯免費app-綠色工廠好玩App

"The invasion plan 3" interactive sound installationBY： ZHENG DAHear or not hear? Use the sound to disperse the crowd and animals.The high frequency sound waves which above the 15000Hz range, is on the verge of human hearing. It usually as a sound source which is meaningless,invalid,and imperceptible,but can delineate human and other creatures, as well as different people. This new iPad version of the "The invasion plan 3" interactive device visualized high frequency sound waves and by switching the sound quietly divided people into different ages,classes。。。This application is used to distinguish between professor and student.More information is available in the APPLE STORE.Zheng Da