Low-frequency muffler

For the purpose of muffling low-frequency sound waves such as occur in components of fluid-flow engines, the muffler proposed here consists of a feed pipe (1) through which (3) and around which (4) a medium flows. At its end in the direction of flow, the feed pipe (1) has a row of muffling bore holes (2) distributed over the periphery, via which the medium (4) flowing around the feed pipe (1) flows into the interior of the feed pipe (1). The effective length L of the feed pipe (1), the cross-sectional area A of the feed pipe (1) and the total cross-sectional area B of the muffling bore holes form the geometric parameters for calculating an optimum muffling of the low-frequency sound waves.