황요하 2024-01-12T05:34:24Z 2024-01-12T05:34:24Z 1995-06-08 https://pubs.kist.re.kr/handle/201004/78682 소음전달　파이프의　경로차이를　이용한능동소음　제어방법　및　그　장치 Patent 1995-06-08 1992-04-15 85545 92-6305 KO 특허 한국과학기술연구원