Low-frequency noise has been a long-standing issue in the context of a complex underwater environment. While theory related to low-frequency sound insulation in air has been developed, systematic research on underwater sound insulation has not yet been established. In our work, we used a chiral variable pitch spiral structure to study underwater low-frequency sound insulation and calculated the sound insulation effect using different parameters. Our results show that the fixed-pitch spiral structure has a better effect on underwater sound insulation and can achieve 3505 Hz–5355 Hz wide-band sound insulation. This spiral structure breaks through the limitation of appearance and can achieve sound insulation at the frequency of interest without changing the outer profile of the structure. Accordingly, it has potential in underwater low-frequency sound insulation applications.

中文翻译：

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具有手性螺旋结构的水下宽带隔音

在复杂的水下环境中，低频噪声一直是一个长期存在的问题。尽管已经开发出与空气中的低频隔音相关的理论，但尚未建立对水下隔音的系统研究。在我们的工作中，我们使用了手性可变螺距螺旋结构来研究水下低频隔音，并使用不同的参数计算了隔音效果。我们的结果表明，固定螺距螺旋结构对水下隔音效果更好，可以达到3505 Hz–5355 Hz的宽带隔音效果。这种螺旋结构突破了外观的限制，并且可以在不改变结构外形的情况下以感兴趣的频率实现隔音。因此，