An Australian university is studying underwater listening devices to help find the jet . Score: 7 ` ` It 's not certain if there was an impact we would detect it , '' says seismic acoustic analyst . Low frequency signals can travel thousands of kilometers through water under favorable circumstances , Duncan said . An re-examination of data relating to Air France 447 could not detect crash signals from under water .
An Australian university is studying underwater listening devices to help find the jet . Score: 7 `` It 's not certain if there was an impact we would detect it , '' says seismic acoustic analyst . An re-examination of data relating to Air France 447 could not detect crash signals from under water .