| 摘要 |
PCT No. PCT/US96/14168 Sec. 371 Date May 29, 1998 Sec. 102(e) Date May 29, 1998 PCT Filed Sep. 5, 1996 PCT Pub. No. WO97/08948 PCT Pub. Date Mar. 13, 1997A device which functions to influence, either by attracting or repelling marine life includes a mechanism structured and arranged to shuttle a slug, i.e. an iron ball or other element having magnetic properties, between first and second positions in a manner which creates sound audible to marine life, such as fish, which it is desired to attract or repel. In one embodiment, an iron ball is shuttled between an electromagnet and a permanent magnet attached to an acoustic amplification plate. |
