| 摘要 |
<p>The problem is to reduce variations of sound pressure in the sound pressure frequency characteristics. To solve the problem, an acoustic generator includes a film (3) that is a supporting plate; a frame member (5) that is provided on the outer circumference of the film (3); a piezoelectric element (1) that is provided on the film (3) within a frame of the frame member (5); and a resin layer (20) that is provided on the film (3) within the frame of the frame member (5), and the resin layer (20) including an air bubble (8). By the air bubble (8), a decrease in the sound pressure is prevented, peaks and dips in the frequency characteristics of sound pressure are reduced, and high-quality sounds are generated.</p> |
