infrasonicWiktionary 原文英美构词拆解infrainfra-前缀sonicsonic词干infra-below, beneath, inferior词源说明From infra- + sonic.释义形容词adjective1(of sound waves, acoustics) Having frequencies below the human audible range2of a deviceGenerating or employing such sound waves同族词派生词 1infrasonically相关词 2