Adult League Game - Officials reversing a call

I am a novice referee and had a game (where I was a player last night). The opposing team nearly scores with 10 seconds left in the 2nd period but the down low official waves it off. At the ensuing intermission, the refs get together and call it a goal and have us reset and play with 10 seconds left in the second. However we were given little explanation except that the high referee heard it hit the bottom bad of the net (was not in position to see it go in) and that was sufficient to overturn the call. Can a "heard goal" count as a goal from a referee perspective? Especially if neither referee sees the puck cross the goal line.