While seismic reflection amplitudes are generally dominated by acoustical impedance contrasts, there is recent interest in reflections due to contrasts in seismic absorption coefficients (or reciprocal-Q values). In this note, we compare the anelastic reflection coefficient computations with ultrasonic laboratory measurements for such reflections, showing that the laboratory measurements produce reflections, as predicted by the anelastic models. While theory, modeling and experiments produce reflections from Q contrasts, the experimental data produce amplitudes that are larger than our theories predict.

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