Abstract: An electroacoustic device includes a top cover, an electro-acoustic unit and a circuit-board end cover. One end surface of the top cover is formed with a sunken portion and a first coupling portion. The electro-acoustic unit is fixed within the sunken portion. The circuit-board end cover completely covers the sunken portion. The circuit-board end cover includes a wiring board module, an elastic conductive member and a second coupling portion. The elastic conductive member is electrically connected the wiring board module and the electro-acoustic unit. The second coupling portion is located on the wiring board module and connected to the first coupling portion.

Abstract: A piezoelectric ceramic composition includes a top-layer, a bottom-layer and at least one intermediate-layer ceramic sheets stacked to each other for sintering. An alloy layer of silver and palladium is interposed between every two ceramic sheets, and a sliver layer is coated on each exposed surface of the top-layer and the bottom-layer ceramic sheets, so as to form a positive and a negative electrode circuit therein. The piezoelectric ceramic composition with the silver layer is attached to at least one surface of a metal plate to make a piezoelectric element which is used to make a piezoelectric actuator, loudspeaker or buzzer.