航船噪声引起的低频海洋环境噪声级发展趋势

海试验洋环境噪声是影试验响所有水下声探测系统性能的主要干扰源,了解海洋环境噪声长期的发展规律对顺利开展水声探测,进行新的理论和方法的试验室论证具有重要的意义和价值。该文通过对大量文献的概括总结,给出了上个世纪50年代至今由于航船噪声引起的低频海洋环境噪声级变化过程,分析了海洋噪声的变化趋势及其造成这种变化的原因,认为远处航船噪声已被公认为产生低频海洋环境噪声的主要噪声源。本文的研究为系统地了解低频海洋环境噪声级的变化规律提供了参考。

Noise Level Evolution of Low-frequency Ocean Ambient Noise Caused by Ship Sources

Ocean ambient noise is the main interference source on all underwater acoustic detection systems.This noise has changed significantly during the past decades,so the spectrum characteristics and rules obtained decades ago can not be used for present research.To better understand the evolution of ocean ambient noise,we summarize the changes of low-frequency ocean ambient noise level caused by ship noise sources over the period from 1950s to present on the basis of a large number of literatures,analyze the trend and cause of ocean ambient change,and draw a conclusion that the rapid increase in ships results in an increase in low-frequency ambient noise level.