Study on Attenuation Properties of Surface Wave of AE Simulation Source Based on OPCM Sensor Element

Wang, Ziping; Xue, Xiao; Li, Xingjia; Jiang, Zhengxuan; Reddy, K. V.

doi:10.1155/2018/6926594

Cited by 3 publications

(2 citation statements)

References 15 publications

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“…Wild amplitude attenuation eliminates the high-amplitude noise which always appears on seismic data such as sonic wave, spike noise, noise burst or erratic noise, power-line noise (50Hz in Nigeria) [29,30]. WAA filter is based on the idea of "identifying noise on multi-traces and attenuating it from single trace".…”

Section: Wild Amplitude Attenuation (Waa) Methodsmentioning

confidence: 99%

“…Presented in Figure 29 is a representative of the noise removals from six raw shot gathers using frequency wavenumber number (FK) and wild amplitude attenuation (WAA) filters [30]. Figures 30 is a representative display of removing both linear and ambient noise from fourteen raw shot gathers using the combination of frequency wave number and wild amplitude filters.…”

Section: Noise Removal From Raw Shot Gathersmentioning

confidence: 99%

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Ambient Seismic Noise Footprints and Spectra in the Middle Benue Trough, Nigeria

Mbachi¹,

Uko²,

Eze³

et al. 2019

Earth sci. Malays.

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Ambient noise was analysed from a two-dimensional (2D) seismic data acquired in the Middle Benue Trough, Nigeria for the purpose of characterizing the ambient seismic noise. Sercel 428XL recording instrument was deployed on 3 traverse lines where dynamite explosive sources and geophone detectors were used. The acquired data was processed using frequency wavenumber (FK) and wild amplitude attenuation (WAA) algorithms. The dominant amplitude of the primary reflection ranges between -20dB and -10dB, while those of the ambient seismic noise varies between -42dB and -3dB. The primary reflections have dominant frequency varying from 6Hz to 75Hz while that of ambient seismic noise varies between 4Hz and 70Hz. Analysis of the noise shows two distinct ground roll modes with velocities between 400 ms -1 and 810 ms -1 both of which are dispersive with wavelength (λ) of 61.5m and peak frequency at 6.5Hz. Analysis of passive noise records acquired showed that ambient seismic (background) noise level excluding source-generated noise average of 91.56% are below 25µV, which is the tolerance noise level limit. The combination of frequency wavenumber FK and WAA filters effectively attenuated the surface waves especially ground rolls and other high amplitude noise making the primary reflection very visible and better enhanced. The filtered amplitude values estimated from signal-to-noise (SNR) analysis using cross correlation (XC) method are much higher than the values of the unfiltered amplitudes indicating that SNR are highest when noises are attenuated from the data than when noise algorithm is not applied to the data. The attributes of these seismic noises will provide further information and solution for their suppression during seismic data acquisition and processing.

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Section: Wild Amplitude Attenuation (Waa) Methodsmentioning

confidence: 99%

Section: Noise Removal From Raw Shot Gathersmentioning

confidence: 99%

Ambient Seismic Noise Footprints and Spectra in the Middle Benue Trough, Nigeria

Mbachi¹,

Uko²,

Eze³

et al. 2019

Earth sci. Malays.

View full text Add to dashboard Cite

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Applying the fuzzy comprehensive evaluation method in selection of non-destructive testing method of steel structure welds

et al. 2022

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Research on the Progress of Interdigital Transducer (IDT) for Structural Damage Monitoring

et al. 2021

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In the application of Structural Health Monitoring (SHM) methods and related technologies, the transducer used for electroacoustic conversion has gradually become a key component of SHM systems because of its unique function of transmitting structural safety information. By comparing and analyzing the health and safety of large-scale structures, the related theories and methods of Structural Health Monitoring (SHM) based on ultrasonic guided waves are studied. The key technologies and research status of the interdigital guided wave transducer arrays which used for structural damage detection are introduced. The application fields of interdigital transducers are summarized. The key technical and scientific problems solved by IDT for Structural Damage Monitoring (SHM) are presented. Finally, the development of IDT technology and this research project are summarised.

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Study on Attenuation Properties of Surface Wave of AE Simulation Source Based on OPCM Sensor Element

Cited by 3 publications

References 15 publications

Ambient Seismic Noise Footprints and Spectra in the Middle Benue Trough, Nigeria

Ambient Seismic Noise Footprints and Spectra in the Middle Benue Trough, Nigeria

Applying the fuzzy comprehensive evaluation method in selection of non-destructive testing method of steel structure welds

Research on the Progress of Interdigital Transducer (IDT) for Structural Damage Monitoring

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