The Collaborative International Dictionary
Microbarograph
Microbarograph \Mi`cro*bar"o*graph\, n. [Micro- + barograph.] An instrument for recording minor fluctuations of atmospheric pressure, as opposed to general barometric surges.
Usage examples of "microbarograph".
Other officers told of detection methods used to judge the size and position of explosions, and how they intended to jam the Russian detection devices like the radar that detects changes in the electric charges in the ionosphere, and the recording barometers that record air and sound waves and produce microbarographs, and the radio signals that are picked up from the release of radio energy at the time of the explosion.