The U.S. Navy acknowledged on Wednesday that the pings they got in the past seven weeks are not from the missing Malaysian Airlines Flight 370's black box.
Michael Dean, deputy director of ocean engineering of the Navy, said the pings came from other man-made sources not related to the jet that mysteriously disappeared on March 8 and until now remains without a trace.
If indeed the pings are from the black box, the searchers would by now have found the source after scanning 329 square miles of the southern Indian Ocean floor. He said other countries share the same conclusions about the source of the pings.
"Our best theory at this point is that (the pings were) likely some sound produced by the ship ... or within the electronics of the Yowed Pinger Locator," Dean told CNN.
He said that when water seeps into electronic equipment and grounds or shorts something within, the device starts producing sound.
However, U.S. Navy spokesman Chris Johnson belied Dean's statement and called them speculative and premature, reported The Telegraph. Johnson said, "We continue to work with our partners to more thoroughly understand the data acquired by the Towed Pinger Locator."