| 摘要 |
<p>The present invention relates to a speaker with enhanced directivity and, more particularly, to a directional speaker with a plurality of piezoelectric ceramic cells, wherein a output direction of a sound is controlled by a control unit which is formed on each piezoelectric ceramic cell and controls the output direction of a sound wave motion generated in the corresponding piezoelectric cell. According to the present invention, the sound wave motion with the enhanced directivity is outputted by preventing interference on the wave motion output part of the existing piezoelectric ceramic cells when the sound wave motion of each piezoelectric ceramic cell is outputted. Therefore, costs are reduced by decreasing the installation number of the piezoelectric ceramic cells according to the output of the improved sound quality by the small number of the piezoelectric ceramic cells in comparison with the existing piezoelectric ceramic cell.</p> |
