| 摘要 |
PROBLEM TO BE SOLVED: To provide an acoustic generator capable of increasing sound pressure level in full bandwidth including a low frequency band.SOLUTION: An acoustic generator 1 includes: a case 2 having a case body 21 which has an opening and bottom plate 22 provided to cover the opening; and a laminated piezoelectric element 3 which is stored in the case 2 to vibrate the bottom plate 22 of the case 2. A spacer 4 is interposed between the bottom plate 22 and the laminated piezoelectric element 3. Viewing from a lamination direction of the laminated piezoelectric element 3, the outer edge of a plane side connecting with the bottom plate on the spacer 4 is positioned at the outer side than outer edge of end surface 30 of the laminated piezoelectric element 3.SELECTED DRAWING: Figure 1 |
