| 摘要 |
<p>A loudspeaker (10) for projection sound over a listening area having a driver (22) and a horn (24) in which the horn has a coupling portion (42) communicating at an interface (47) with an outwardly flaring portion (44), the horn (24) forming an elongated slot (46) at the interface (47) and being provided with means (40, 42) for controlling the sound energy along the axis of elongation of the slot (46), namely a slot (46) which is narrower at one end (54) and flares outwardly to the other end (50) or a plurality of transverse veins (70, 80, 82) dividing the slot (46) and sound channel (36).</p> |
