Seismic and acoustic emissions of a booming dune. [in lunar, planetary and terrestrial sand motion]
Seismic and acoustic emissions of a booming dune. [in lunar, planetary and terrestrial sand motion]
复制标题
蓬勃发展的沙丘的地震和声发射。
DOI：
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发表时间：
1975
期刊：
影响因子：
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通讯作者：
D. L. Reasoner
中科院分区：
文献类型：
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作者：
D. Criswell;J. Lindsay;D. L. Reasoner
罕见的蓬勃发展的沙丘发出低频音乐般的声音，而他们正在下滑或受到强制剪切。这样的沙丘已经有1500多年的历史了。第一次定量记录的短时间（101秒）强制发射（获得在沙山附近的法伦，内华达州）揭示，地震频谱是由50和80赫兹之间的尖峰。50- 80-Hz的声波频谱类似于地震频谱，也显示出较低振幅的一次谐波分量（100-160 Hz）。大约0.1-1%的剪切能量转化为地震辐射。声能量的产生效率大约低200倍。总结了沙山沙丘发育的文献资料和同期沉积学调查的结果。
The sands of rare booming dunes emit low-frequency musiclike sounds while they are slumping or undergoing forced shearing. Such dunes have been known for more than 1500 years. The first quantitative recordings of the short-duration (≲1 s) forced emissions (obtained at Sand Mountain near Fallon, Nevada) reveal that the seismic spectrum is composed of sharp peaks between 50 and 80 Hz. The 50- to 80-Hz acoustic spectra, resemble the seismic spectra and also display a lower-amplitude first-harmonic component (100–160 Hz). Approximately 0.1–1% of the shearing energy is converted to seismic emissions. Generation of acoustic energy is approximately 200 times less efficient. The available literature on booming dunes and results of a concurrent sedimentology investigation of Sand Mountain are summarized.