Department of Electronics and Communication Engineering, Khulna University of Engineering & Technology, Khulna, 9203, Bangladesh.
Sci Rep. 2020 Sep 28;10(1):15911. doi: 10.1038/s41598-020-73079-z.
Cross-correlation based fisheries stock assessment technique utilized array of multiple acoustic sensors which were equidistant pair. However, at practical implementation of this technique, equal distances among acoustic sensors is sometimes challenging due to different practical phenomenon. Therefore, in this study, we work on this issue and investigated the impact of unequal distances among the acoustic sensors. We found that cross-correlation based technique proved its effectiveness even for the unequal spacing among acoustic sensors. We considered chirp generating species of fish and mammals, i.e., damselfish (Dascyllus aruanus), humpback whales (Megaptera novaeangliae), dugongs (Dugong dugong), etc., species, and three acoustic sensors array for simulation purposes. Some limitations including negligence of multipath interference, assuming the delays to be integer were compromised during simulations.
基于互相关的渔业种群评估技术利用了多个声学传感器的阵列，这些传感器是等距对。然而，在该技术的实际实施中，由于不同的实际现象，声学传感器之间的等距有时具有挑战性。因此，在本研究中，我们研究了这个问题，并调查了声学传感器之间不等距的影响。我们发现，即使在声学传感器之间存在不等间距的情况下，基于互相关的技术也被证明是有效的。我们考虑了产生声纳的鱼类和哺乳动物物种，即雀鲷（Dascyllus aruanus）、座头鲸（Megaptera novaeangliae）、儒艮（Dugong dugong）等物种，并为模拟目的使用了三个声学传感器阵列。在模拟过程中，存在一些局限性，包括忽略多径干扰，假设延迟为整数。
