| 摘要 |
PURPOSE: A variable directional parabolic reflective speaker is provided to reduce the size of a speaker by obtaining a large radiative pattern using a reflection mirror having a small semi-diameter. CONSTITUTION: A fixing unit(310) fixes a position of a speaker to be installed. A fixing bar(320) having a predetermined length is connected to the fixing unit(310) through a first joint(350). A hemispherical inclined reflection mirror(330) is connected to a side of the fixing bar(320) through a second joint(360) and has a predetermined gradient. A speaker unit(340) is horizontally installed within the hemispherical inclined reflection mirror(330) to output an electrical signal as a sound signal. The first and second joints(350,360) are hinge structures capable of changing all directions.
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