Measurement of the Frequency Characteristics of the Scattering Amplitude Using the Dolphin's Sonar Signal
Measurement of the Frequency Characteristics of the Scattering Amplitude Using the Dolphin's Sonar Signal
复制标题
利用海豚声纳信号测量散射幅度的频率特性
DOI：
10.3135/jmasj.33.143
复制
发表时间：
2006
期刊：
影响因子：
--
通讯作者：
T. Akamatsu
中科院分区：
文献类型：
--
作者：
T. Imaizumi;M. Furusawa;T. Akamatsu
海豚利用其出色的声纳能力来探测、追踪和捕食鱼类作为食物。如果将其声纳的一些优点（例如目标识别能力）引入我们的渔业回声测深仪中，应该可以进行改进，因为目的相似。在本研究中，我们重点关注海豚声纳的宽带特性。我们利用海豚的声纳信号测量了金属球和金鱼的散射幅度的频率特性。我们利用宽吻海豚和江豚的声纳信号测量了入射波和反射波对金属球的绝对散射幅度。测量的散射幅度与宽带的理论值相当吻合。在宽带中获得的金鱼散射幅度几乎是合理的。这些观察结果表明，海豚可能利用宽带散射幅度来识别物体，该幅度比回波频谱更清晰地显示物体的特征。
Dolphins detect, pursuit, and prey fish as their food by using their excellent sonar ability. If some advantages of their sonar such as object identification ability are introduced to our fisheries echo sounder, improvement should be possible because the purposes are similar. We focus on the wideband characteristics of dolphin's sonar in this study. We measured the frequency characteristics of the scattering amplitude of metal spheres and goldfish using the dolphin's sonar signal. We measured the absolute scattering amplitude of the metal spheres by the incident wave and the reflected wave by using sonar signals of bottlenose dolphin and finless porpoise. The measured scattering amplitudes agreed fairly well with the theoretical values in wideband. The scattering amplitudes of goldfish obtained in wideband were almost reasonable. These observations suggested that the dolphin possibly use the wideband scattering amplitude, which exhibits features of objects clearer than the echo spectrum, for the object identification.