English version

black box in Measurement topic

From Longman Dictionary of Contemporary Englishblack boxˌblack ˈbox noun [countable] informal  TTATMa piece of equipment on an aircraft that records what happens on a flight and can be used to discover the cause of accidents syn flight recorder
Examples from the Corpus
black boxThey're still looking for his black box.The briefcase-sized black box contained a keyword selection computer.It was a small black box, rather like the Thing, mounted on little treads.A second later there was a loud click and buzz which could only be the black box alarm being activated.Accident investigators have found the black box flight recorder.New investigative techniques have opened up the black box of the brain and have begun to shed light on its inner workings.