| 摘要 |
An electro-acoustic transducer comprises a cylindrical piezoelectric cell with two electrodes. A hollow cone, a tapered hollow cone and a metallic ring are introduced to the transducer. The hollow cone is fixed on the butt end of cylindrical piezoelectric cell; the tapered hollow cone is fixed on the top of cylindrical piezoelectric cell, the metallic ring is located in the minor base of the tapered cone. The vertices of cones are directed inside of the cylindrical piezoelectric cell. |
