1. n. [Formation Evaluation]

A log or a recording in which the complete signal received at an acoustic transducer is recorded. With full-waveform recording, it is possible to determine the slowness not only of the first arrival but also of later arrivals. In borehole sonic logging, these may be the shear, flexural and Stoneley waves. The waveforms are recorded by an array of receivers in an array-sonic tool, and processed with a suitable technique such as slowness-time coherence.

See: acoustic transducer,  array sonic,  flexural mode,  pulse echo,  shear wave,  Stoneley wave