detector

Did you lie at any point during this lie detector test and we didn't catch you?

Come back on the lie detector test, please.

I'm doing a lie detector test.

So by comparing the time it takes for them to reach detectors around the world, geophysicists can slowly piece together a picture of structures incredibly far below our feet.

When this impulse reaches the fault, it causes an electrical arc which can be heard as a thump above the ground, usually aided by a handheld detector with a microphone and digital filters.