摘要
本文对不同介质的受击空气声(SABS)、界面固体声(SSBSB)和沙层固体声(SSBSS)进行了测量,并与某些动物的感觉特性相比较。脆硬介质(Ⅰ)的SABS的主峰频率和幅值都明显高于低硬介质(Ⅱ)和含断面的低硬介质(Ⅲ)。可见,震前宏观地声的音色和强度的地区差异和某些动物的听觉效应与局部地区的介质特性有关。冲击能量(SE)为3×10~5尔格时,介质Ⅰ的SSBSB和SSBSS可被鸽、猫和某些昆虫觉察到,但介质Ⅱ猫觉察不到,介质Ⅲ只有某些昆虫可觉察到。SE为1.6×10~6尔格时,介质Ⅱ和Ⅲ的SSBSB和SSBSS可被鸽、猫、鼠和某些昆虫觉察到。相当于某些强震前一级左右的小震能量传至地表衰减7个数量级所激起的SSBSB和SSBSS仍有可能被这些动物觉察到,并与局部地区的介质特性有关。
In this paper, in the different medium the shocked airborne sound(SARS), the shocked solid-borne sound on the boundary (SSBSB) and the shocked solid-borne sound in : and on the boundary (SSBSS) are measured, and are compared with the sense property in some animals.In the frangibilio-rigid medium (Ⅰ) , the main peak fraqueney and the amplitude of the SABS are obviously higher than that of the medium with low rigidity (Ⅱ) and the medium with low rigidity consisting of the sections (Ⅲ), This suggests that the geographic difference in the timbre and the intencity of the macroscopic geosound and the hearing effect in ome animals before earthquakes are related to the property of the medium at each local region.The shocked energy(SE) being 3×105 erg, the SSBSB and ihe SSBSS of the medium I may be sensed by pigeons, eats and some insects, but of the medium Ⅱ cats may not sense and of the medium Ⅲ only may be sensed by some insects. the SE being 1.6×106 erg, the SSBSB and the SSBSS of the medium Ⅱ and Ⅲ may be sensed by pigeons, eats, rats and some inseets. The SSBSB and the SSBSS can be caused correspondingly by the energy of small quakes at one magnitude or so before some strong earthquakes, which has travelled to ground surface and attenuated by seven order of magnitudes, and it still may be sensed by these animals, In addition they are related to the property of the medium at each local region.
出处
《地震研究》
CSCD
北大核心
1989年第1期52-60,共9页
Journal of Seismological Research
基金
地震科学联合基金
关键词
地震
动物
行为反应
声振动
Medium, Shocked air-borne sound, Shocked solid-home sound on the boundary, Shocked solid-borne sound in sand, Animal behavior response
