| 摘要 |
A hybrid speaker is provided to improve a sound quality over the whole band by forming an aerogel layer on one surface of an element, and compensate a low band by using the element and a damper. An element(500) has an aerogel layer formed on one surface, and generates a sound pressure by using a piezoelectric effect. A printed circuit board(100) is electrically connected to the element, and is applied with an AC voltage from an exterior. A ring-type insulator(300) is interposed between the element and the printed circuit board, and has a receiving hole at a center portion. A case(700) accommodates the element, the printed circuit board, and the insulator, and at least one sound pressure discharging hole(700) is formed on a bottom surface of the case. |
