| 摘要 |
A sound deadening window ventilation apparatus (10) is disclosed wherein fresh air is drawn through an air inlet orifice into an upper plenum chamber (12) by means of an electric fan assembly (44), moved through a lower plenum chamber (14) and dispelled from an air outlet orifice (26) is disclosed. Air to be dispelled through the air outlet orifice (26) is moved through a filter (60) held in a filter frame (54). The upper plenum chamber (12) is slidably inserted into the lower plenum chamber (14) such that the outer dimensions of the unit can be varied to fit various sized window openings. Sound traveling through the sound deadening window ventilation apparatus (10) must travel an indirect path and is thereby disrupted. Additional interior baffle plates (580) further disrupt sound and cause it to lose energy. A sound deadening blanket (52, 552) absorbs sound energy as it travels through the plenum chambers (12, 14). |
