structural wave through the metal and go much faster. work was done whether you could tell the difference between the noise of the bomb versus structural failure. after a international committee and funding with the fbi and another agency over a long period and a united kingdom expert who did ha anecdoe toral thesis on this, they say it is a low random noise. we used a door blowing off and compare that to lockerbie. we had the inventories from these explosives of the past as well as decompression and from the international committee, so we tried to analyze all of those sounds to see if we could tell the difference and the team of experts from many countries was unable to. so the end of the research concluded that you cannot differentiate between a bomb and explosive decompression using sound on a recorder.