AI Article Synopsis
- Small- and medium-scale scattering can significantly distort acoustic imaging due to frequency-dependent phase changes, making it difficult to interpret signals in multi-channel recordings.
- The proposed compensation methods involve two steps: creating a rough signal guide using extensive beamforming, and applying specialized time-frequency masking for each trace to restore the corrupted phase and amplitude information.
- The use of phase masks helps enhance the clarity of target events, while amplitude masks effectively eliminate unwanted background noise, ensuring clear signals without losing frequency resolution.
Article Abstract
Small- and medium-scale scattering can be extremely damaging for acoustic imaging. The mechanism for distortions is related to severe frequency-dependent phase perturbations making signals obscure on multi-channel records. Methods are proposed to compensate for such effects in seismic reflection imaging in two steps. First, the rough signal guide is constructed using massive beamforming. Second, trace-by-trace specialized time-frequency masking is employed to reconstruct the corrupted phase and amplitude spectra. Phase masks are of paramount importance to make target events coherent and visible. Amplitude masks remove scattered background noise from the amplitude spectra. Unlike beamforming itself, these methods avoid smearing of signals across channels and preserve full frequency bandwidth.
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| http://dx.doi.org/10.1121/10.0001330 | DOI Listing |
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