Sentence examples for direct arrival from inspiring English sources

They also allowed investigating the respective amount of "direct arrival" surface-wave energy (surface waves with a back-azimuth propagation direction within a ±20° angle around the source back-azimuth) and of the "diffracted" surface-wave energy (surface waves coming from other directions).

Intimacy, for example, was defined as the time delay between the direct arrival of the sound from the stage and that of the very first reflections, which have presumably bounced off protruding side balconies.

In the experimental investigation, only direct arrival signals are considered.

(Delta t) equals zero if the correlation coefficient of the direct arrival is the largest.

In contrast, if the threshold is too small, the peak in front of the direct arrival may be detected.

The pasteupped correlograms after the reprocessing showed that both new methods accurately identified the peak around the direct arrival.

They interfere with the direct arrivals and hence reduce the reliability of direct-arrival traveltimes and amplitudes.

Therefore, parallel processing using these methods will help verify the reliability of the identification of direct arrivals.

This indicates that a large threshold (0.30) makes the result unstable due to overlooking peaks around direct arrivals with a smaller coefficient than the threshold so that the smaller threshold definitely picks peaks in the first envelope.

This is not evident in the seismograms for the mainshock because the direct arrivals had very large amplitudes at periods slightly larger than the site resonance period of approximately 4 s (see the next section) as a result of the strong pulse-like input ground motions with periods of 6 7 s at the base of the sediments (e.g., Galetzka et al. 2015; Takai et al. 2016).

Secondly, some large travel-time residuals of ~ 60 s could, in fact, indicate a seismic phase miss-interpretation when, for example, a near-source surface reflection (pP or sP) is erroneously interpreted as the direct P arrival or when a PKPab arrival is miss-interpreted as either the PKPbc or PKPdf.