【摘要】 次声是频率小于20 Hz的声波,自然界中各种物理现象在孕育、发生、发展过程中均伴随有次声波的产生,并且不同物理现象所产生的次声波有着各自固有的频段,随着监测手段的逐步完善和CTBTO全球次声检测系统的逐步建立,次声波在灾害监测方面发挥着越来越重要的作用。介绍了次声监测的常用装置和定位方法,阐述了不同灾害在孕育阶段和发生阶段所产生的次声波的频率,并通过介绍多种灾害在孕育、发生阶段产生的次声波,分析了对于同种灾害在酝酿期和发生过程中所产生的次声波频率的不同。更多还原

【Abstract】 The infrasound is a sound wave with the frequency less than 20 Hz. Breeding,occurrence and development of various physical phenomena in the nature are accompanied with generation of infrasonic waves. Furthermore,infrasonic waves produced from different physical phenomena have their own natural frequency bands. As monitoring methods are gradually improved and the global infrasonic detection system of CTBTO is progressively established,the infrasonic wave plays a more and more important role in disaster monitoring. Common devices and positioning methods for infrasound monitoring are introduced. Frequencies of the infrasonic waves produced from different disasters in the breeding stage and at the occurrence are addressed. By introducing these infrasonic waves,the frequency difference between the infrasonic waves generated from the same disaster in the breeding stage and during its occurrence is analyzed.更多还原