William F. Waite
Myung W. Lee
2011
<p><span>Acoustic transmission </span>measurements<span> of compressional, P, and shear, S, </span>wave<span> </span>velocities<span> rely on correctly identifying the P- and S-body </span>wave<span> arrivals in the </span>measured<span> waveform. In cylindrical samples for which the sample is much longer than the acoustic wavelength, these body </span>waves<span> can be obscured by high-amplitude waveform features arriving just after the relatively small-amplitude P-body </span>wave.<span> In this study, a </span>normal mode<span> approach is used to analyze this type of waveform, observed in sediment containing gas hydrate or </span>ice.<span> This analysis extends an existing normal-mode waveform propagation theory by including the effects of the confining medium surrounding the sample, and provides guidelines for estimating S-wave </span>velocities<span> from waveforms containing multiple large-amplitude arrivals.</span></p>
application/pdf
10.1121/1.3552877
en
Acoustical Society of America
Anomalous waveforms observed in laboratory-formed gas hydrate-bearing and ice-bearing sediments
article