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Underwater drone Bluefin-21 has completed its scouring of the zone off the West Australian coast where the man-made sounds were picked up, and come up with nothing.
A massive broadening of the search area is now expected, based on a fresh analysis of data that led British satellite firm Inmarsat to conclude the plane crashed in the southern Indian Ocean.
New Zealander Danica Weeks, whose mechanical engineer husband Paul had boarded MH370 on his way to start a new job in Mongolia, remains in Perth, where their family moved after the Christchurch earthquakes in 2011.
"When your child cries for their father, it just breaks your heart and I can't tell them the truth because I don't know," Ms Weeks told the Seven Network.
"I still haven't reconciled that he's not coming back, because I've had nothing.
"When you don't have anything - not even a piece of the plane, just nothing, and so many different stories - how can you not have a little piece of hope?"
The couple have two boys, Lincoln, 3, and 13-month-old Jack.