Hawk Cyril Rioli marked a moment before the final siren sounded but, amid intense crowd noise, was allowed to play on by umpire Brett Rosebury before the game was officially called to an end.
Umpires also had trouble hearing audio from their earpieces when trying to conduct score reviews during the game.
MCC communications manager Shane Brown told AFL.com.au the siren worked effectively in the lead-up to Friday night's game, but officials would investigate on Monday whether it had been set to the wrong volume.
"There's nothing to suggest we had a malfunction in the system so the next test for us is to discuss with the operators of the system about the volume levels that were set during the game just to make sure that they are at the levels we want them to be," Brown said.
"We're going to have to discuss all that with the experts tomorrow and then if we have to reassess the levels, [we will].
"At certain stages throughout the night people did refer to the weak sound of the siren, so it was working.
"Whether it was working to the right level for a noisy crowd, maybe that's something we need to tick off with those who are in charge of setting that volume."
AFL spokesperson Patrick Keane confirmed there was nothing wrong with the volume of the siren when it was tested in the lead up to the game.
He also said the League was satisfied with its backup plan, whereby each on-field umpire is linked to the emergency umpire via earpiece.
The emergency umpire has access to the official match clock and alerts the on-field umpires when each quarter has ended.
"That's the failsafe that's operated for a couple of years," Keane told AFL.com.au.
"There are parts of the ground where, depending on the noise at times in the stands, [the siren] can be really hard to hear, but for the umpires they're just automatically linked into the emergency umpire.
"In terms of large games where crowd noise could potentially be an issue, it's an automatic instruction to them that the emergency umpire just tracks the clock."
St Kilda captain Nick Riewoldt said it would be an "absolute travesty" if the outcome of a match was influenced by umpires failing to hear the final siren.
Riewoldt was involved in the famous 2006 clash against Fremantle in Launceston when play continued 20 seconds longer than it should have because the siren wasn't heard by the officials.
During those extra seconds, St Kilda tied the game – robbing the Dockers of victory.
The match was eventually awarded to Fremantle. It was just the second time in VFL/AFL history that the score and result was changed on protest.
"I've been in a situation where the siren went off and the players didn't know and the umpires didn’t know and we had the whole 'siren-gate' debacle down in Tasmania," Riewoldt said on Channel Seven's Game Day.
"You do play in games and the crowd is so loud that it's difficult to hear.
"That would be an absolute travesty if it affected the outcome of the game."
Twitter: @AFL_Harry
