Sentence examples for echoes were present from inspiring English sources

But the music students struggled more often when trying to ferret out words when background noise or echoes were present.

The look-up mode is a more or less conventional radar mode with a low pulse-repetition-frequency (prf) that is used when the target is at medium or high altitude and no ground-clutter echoes are present to mask target detection.

For typical LMS incidences, strong echoes are present for the null resolution resulting in high and punctual biases visible from 40 to 60 m in Figure 12.

Figure 7b shows that once the 40-ns correction has been applied, a single population of echoes is present whose elevation monotonically decreases with range and whose virtual height lies near 280 km.

Current models of bat echolocation typically break down when fed signals in which many overlapping echoes are present simultaneously, e.g. SCAT model [37].

Here we only plot the result of the block in which the target echo is present.

The target echo is present at an approximated BRS of 4,600 m.

If an echo is present then the corresponding time is taken as the starting time, and then it looks for an echo absence.

We add weighted adjacent block without target echoes into the block in which target echo is present to obtain data with different SRRs.

And approximates to the number of target echoes since for target echoes in the matrix, if the transmitted signal is CW, and the target echo is present in the block.

One was at the onset of the echo; the other, after the offset of the direct (leading) sound, when only the echo was present.