• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国政府科技报告 >Broadband Measurements of Underwater Acoustic Target Strengths of Panels of Tuna Nets.
【24h】

Broadband Measurements of Underwater Acoustic Target Strengths of Panels of Tuna Nets.

机译：金枪鱼网板水下声目标强度的宽带测量。

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Sample panels of tuna nets of three different mesh sizes (1-1/4,2 and 4-1/2 inches) and two twine types (twisted and braided) were placed in a nearly anechoic chamber, insonified with a broadband sound source, and the returns recorded and analyzed to determine target strength. Measurements were made with panels perpendicular to the source and with a 35-degree bend at the midline. Target strengths ranged from -21 dB to -4 dB for the perpendicular panels and from -23 dB to -16 dB for the bent panels. Two-inch braided net was the most reflective, though all panels produced sufficiently strong returns to allow porpoises to detect them acoustically. (Author)

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号