| 摘要 |
<p>A silencer for silencing and also for filtering exhaust gases, contains at least one acoustic resonator chamber ( 13, 14, 15, 16 ) (Helmholtz frequency), at least one porous body ( 7, 8 ) the porous body ( 7, 8 ) occupying at least part of the chamber and at least one connecting passage ( 17 ) for leading gas from each one of the acoustic chamber wherein the connecting passage ( 17 ) extend along the outher surface of the porous body, so as to lead along a helical flow path ( 19 ).</p> |
