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    • 23. 发明申请
    • SOUND ATTENUATION BOX
    • 声音衰减箱
    • WO1986004668A1
    • 1986-08-14
    • PCT/EP1986000039
    • 1986-01-30
    • FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ...FUCHS, Helmut, V.Ackermann, UlrichRAMBAUSEK, Norbert
    • FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ...
    • F24F13/00
    • F16L55/033
    • A sound attenuation box (1) has in its preferred embodiment a plurality of cavities (2) each covered by one outer vibrating plate (3) and each containing an inner plate (4) pierced with one hole (7) and forming with the cavity (2) a Helmholtz resonator. The gap (S) between the inner plate (4) and the outer plate (3) is so reduced that the vibrations of the outer plate (3) of the Helmholtz resonator are forcibly coupled by air or gas streams induced by the vibrations in the space (5) between the outer plate (3) and the inner plate (4), as well as in the hole (7). The preferred embodiment comprises a plurality of adjacent cavities (2) of which the inner plates (4) are formed by a single common perforated plate (12) and of which the outer plates (3) are formed by a single common cover plate (11).
    • 声音衰减箱(1)在其优选实施例中具有多个空腔(2),每个空腔(2)均由一个外部振动板(3)覆盖,并且每个都包含一个穿过一个孔(7)的内板(4) (2)亥姆霍兹共振器。 内板(4)和外板(3)之间的间隙(S)被减小,使得亥姆霍兹共振器的外板(3)的振动被强制地耦合在空气或气流中 在外板(3)和内板(4)之间的空间(5)以及孔(7)中。 优选实施例包括多个相邻的空腔(2),其中内板(4)由单个公共多孔板(12)形成,并且其中外板(3)由单个公共盖板(11)形成 )。