| 摘要 |
An acoustic transducer for providing large displacement particularly at low acoustic frequencies is formed from a minimum of three curved shells (22A-22D) which are attached to each other at their ends (24). The shells are driven by a ring or corresponding number of attached piezoelectric or magnetostrictive type rod or bar drivers (20A-20D) which take the form of a regular polygon. The curved shells are attached to the ends of the driver and vibrate with a magnified motion as the rods execute extensional motion. As the polygon expands the curved shells deform and produce additional motion in the same radial direction resulting in a large total displacement and corresponding large acoustic output. |
