1A faint copy heard just before an actual sound in a recording, caused by the accidental transfer of signals.
（唱片的）前回声
very faint pre-echoes do not really mar the recording
Example sentencesExamples
Mackerras gets the brasher engineering, and there is some pre-echo here as well.
One only mildly irritating curiosity worth mentioning here is a little bit of what sounds like pre-echo.
2A foreshadowing.
预示，预兆
one can detect pre-echoes of both the later works
后来的两部作品都可以看出预兆。
Example sentencesExamples
It is not a surprise, then, that echoes and pre-echoes of all three composers - with all of the charm but without much of the genius - can be heard in his work.
It featured some striking visual images, and Graham Greene's story, set against a background of racetrack racketeers, offers intriguing pre-echoes of Brighton Rock (which he published in 1938).
A curious pre-echo of Brecht's sardonic wit in East Germany 30 years later when the citizenry was rioting against the autocratic Communist rulers: ‘The government will have to dissolve the people and elect a new one.’
In a kind of pre-echo of Kant and Wittgenstein, Nicolas of Cusa argued that wisdom consists in an awareness of the limits of one's knowledge.
There are some fascinating pre-echoes here of present-day events, but it would be foolish to try to draw ‘lessons’ from them.