Hwang Yoha LEE JONG MIN KYUNGMOK KIM Kim Seung Jong LEE YONG BOK 2024-01-13T13:33:42Z 2024-01-13T13:33:42Z 2021-09-29 https://pubs.kist.re.kr/handle/201004/107458 English muffler New active muffler system using variable length bypass exhaust pipes and a very low back pressure muffler Conference 1 InterNoise 2001 (The 2001 International Congress and Exhibition on Noise control Engineering) InterNoise 2001 (The 2001 International Congress and Exhibition on Noise control Engineering) KO