【摘要】 次声监测台阵结构的合理设计是抑制环境噪声及增强目标次声信号的一种有效手段。结合目标次声信号的特性,假设了次声监测台阵的几种阵列结构,对于不同频率成分、不同信噪比和不同时间长度声信号的响应情况,采用F-K分析法进行阵列响应计算。计算结果表明五边形六元阵适用于频率较低的次声信号;对于既有低频成分又有高频成分的信号,九元阵的响应较好,因此对于目前所关注的大多数次声信号,九元阵是理想的阵列结构。更多还原

【Abstract】 Proper structure design of the infrasonic monitoring arrays is an effective means to restrain the environment noise and enhance the target infrasonic signal. Some kinds of array structure were supposed for the infrasonic monitoring station on the foundation of the characteristic of the target infrasound. Each array response of these array structures was calculated based on F-K analysis for different frequency,different signal-to-noise ratio (SNR) and different period length of sound signal. The results indicate that the pentagon array of six elements is appropriate to the infrasound signal which frequency is lower. On the other hand,the nine elements array has better response for the sound signal which is consisted of low frequencies and high frequencies. Consequently,the nine elements array is the perfect array structure for most infrasonic signal which is paid attention to at present.更多还原