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WANG Baoshan,Sun Daoyuan,LI Shengjie,Li Weidong,Shi Xingjue,Liu Bin
Author NameAffiliation
WANG Baoshan Department of Earth and Space Science, University of Science and Technology of China, Hefei 230026, China 
Sun Daoyuan Department of Earth and Space Science, University of Science and Technology of China, Hefei 230026, China 
LI Shengjie Department of Earth and Space Science, University of Science and Technology of China, Hefei 230026, China 
Li Weidong Department of Earth and Space Science, University of Science and Technology of China, Hefei 230026, China 
Shi Xingjue Department of Earth and Space Science, University of Science and Technology of China, Hefei 230026, China 
Liu Bin Department of Earth and Space Science, University of Science and Technology of China, Hefei 230026, China 
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基金项目:国家自然科学基金(49874043)%Joint Seismological Foundation of China(198090)
The Effect of Heterogeneity on Rock's Ultrasonic Attenuation and Its Correction
WANG Baoshan,Sun Daoyuan,LI Shengjie,Li Weidong,Shi Xingjue,Liu Bin
Abstract:
The effect of Rayleigh scatter caused by the heterogeneity of rocks, on attenuation measurement has been considered adequately. According to the related theory and calculation, we can distinguish the intrinsic attenuation from the scattering attenuation. And we amended the classic spectral ratio method, based on the homogeneous medium hypothesis. Using the improved spectral ratio method, we can obtain Q value within a wider frequency range, so we can eliminate the uncertainty condition in classic spectral ratio, where Q value depends on the frequency range. The frequency shift method has been introduced and improved. Those three methods on one set of data had been applied. The results obtained by using the classic and improved spectral ratio and frequency shift methods fit well.
Key words:  Scatter  Ultrasonic attenuation  Q value  Frequency shift  Spectral ratio