초록

A sound absorbing pipe comprising a circumferential wall, open portions disposed at regular intervals in the circumferential wall having a predetermined area ratio and sound absorbing material disposed in a hollow formed in an interior portion of the pipe.

대표청구항 ▼

A sound absorbing pipe comprising: a cylindrical shaped substantially hollow body comprising one or more elements having an interior surface and two ends; open portions provided at generally regular intervals between said one or more elements and forming with said one or more elements a circumferent

A sound absorbing pipe comprising: a cylindrical shaped substantially hollow body comprising one or more elements having an interior surface and two ends; open portions provided at generally regular intervals between said one or more elements and forming with said one or more elements a circumferential wall, wherein a predetermined open area ratio exists between an area formed of said open portions with respect to an overall area of said circumferential wall; a plurality of rods disposed within an interior of said circumferential wall equidistantly so as to extend longitudinally of said body; a wire being coiled around an outer circumference of said plurality of rods and being welded thereto; and sound absorbing material disposed in a layer of generally uniform thickness adjacent to said circumferential wall, said interior surface of said circumferential wall being substantially entirely covered with said layer, an interior surface of said layer bounding a hollow area formed in an interior portion of said body, said hollow area being in communication with both of said two ends; wherein sound generated outside of said sound absorbing pipe passes through said open portions and is absorbed within said sound absorbing pipe.