| 主权项 |
1. A barrel-shaped multidirectional loudspeaker enclosure structure, comprising:
a hollow housing of a barrel shape, the hollow housing forming a receiving space therein and having a front end and a rear end respectively formed with a front opening and a rear opening, both said openings being in communication with the receiving space, the hollow housing having a middle section whose outer diameter is greater than an outer diameter of the front opening and an outer diameter of the rear opening, the hollow housing having an outer surface concavely provided with a plurality of directional grooves, the directional grooves being evenly arranged along a circumferential direction of the hollow housing and each extending from the front end to the rear end of the hollow housing, wherein the directional grooves have a greater average depth in a part thereof that lies between a middle section of the directional grooves and the rear opening than in a part thereof that lies between the middle section of the directional grooves and the front opening; a loudspeaker fixed in the hollow housing so that a sound generated by the loudspeaker can propagate out of the front end of the hollow housing through the front opening; and a reflective cover formed as a disc-shaped element, the disc-shaped element having a front side concavely provided with an annular reflective groove adjacent to a periphery of the disc-shaped element, the front side of the disc-shaped element being fixed to the rear opening of the hollow housing such that the receiving space is in communication with each said directional groove through the reflective groove, allowing a sound generated in the receiving space by the loudspeaker to be transmitted in a directional manner, by reflection of the reflective groove and via the directional grooves, to a space surrounding but not in front of the hollow housing.
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