| 摘要 |
An air cycling fan unit silencer suitable to be placed at an outlet and/or inlet of a air cycling fan unit, wherein the silencer includes a first air flow changer. Furthermore, a second air flow changer may be spaced from the first air flow changer and arranged to create a plurality of substantially non-linear air flows. Although the non-linear air flows create turbulence, which is typically a source of noise generation at a frequency of around 500Hz - 2000Hz, advantageously it has been found that by forming one of the air flow changers and preferably both air flow changers from a sound absorbing material such as acoustic foam, the sound generated by air movement on the supply side of the unit can be substantially reduced. |
