| 摘要 |
<p>A low-profile speaker assembly comprises a substrate (310) and a substantially plan piezoelectric element (300, 500) disposed in a plane substantially parallel to the substrate (310) and mechanically connected to the substrate (310) at one or more edges. A tuning mass (330, 550) is attached to a face of the piezoelectric element (300, 500), to improve low-frequency performance of the speaker assembly. In some embodiments, the tuning mass (330, 550) is disposed on the surface of the piezoelectric element (300, 500) facing the substrate (310). The substrate (310), which may comprise a printed circuit board, may include a cut-out region (315) arranged to allow movement of the tuning mass (330, 550) within the cut-out region (315).</p> |
