When all was said and done Sunday, the scoreboard read Saints 23, Falcons 13.

But on this Christmas Eve, it should have read Who Dat Nation 105, Saints 23, Falcons 13.

The 105 represents the decibel level at kickoff, which is the threshold of pain for the human ear.

It's the sound equivalent of standing near a buzzsaw — which, incidentally, is what the Saints resembled as they beat their nemesis from the ATL for the first time since 2015.

In other words, Saints fans were loooooud.

"It's been a long time since it has sounded like that," said Saints punter Thomas Morstead, a Saint since 2009. "It felt like old times. Hopefully we can keep handling business next week and get a home playoff game and get another shot to play here in the playoffs."

All week long, the Saints urged their fans to cheer the whole game long.

The fans gave the Saints what they wanted.

And in return, the Saints gave the fans what they wanted: a win over the Falcons in what was one of the most anticipated and meaningful games in the Mercedes-Benz Superdome in the past few seasons.

"The crowd gave us exactly what we needed from them," said Cam Jordan, whose two sacks revved up the crowd even more. "That's probably as loud as you're going to get here. I think maybe one time other than this I've heard it louder. Maybe. We were able to feed off their energy."

Saints fans cheered just as loud on first and second down as they've always done on third. They waved the white towels that said "Let's Go Saints," too, long before the fourth quarter when the Falcons had to wave their own white flag and postpone their playoff hopes for at least another week.   

Saints fans forced the Falcons into committing two false starts in the first half.

But the crowd got into this one before the game even started — especially right after the coin toss.

That's when Drew Brees and Steve Gleason met at around the 30-yard line.

No player who's ever worn the black and gold gets the fans as loud for a Falcons game as Gleason, whose blocked punt in 2006 almost brought down the house.

So when Brees held up Gleason's arm, then dropped it down to start off the traditional pregame Who Dat chant, the place went nuts.

The crowd never let up.

Brees, who has been with the Saints since 2006, ranks the noise pretty high on the list of games he's played in his 11 seasons in New Orleans.  

"I thought this was top-three," Brees said. "Loud atmosphere, and it was just electric from the very first series and consistent the whole game."

Wide receiver Ted Ginn Jr., in his first year with the Saints, added: "It's the first time I've ever seen this stadium like that. I've always heard about how loud this stadium gets. I've played on the other side here and it wasn't really that effective. But I saw today that if you don't have your things right, coming in this Dome is going to be tough."

And it was tough all game long for the Falcons, who didn't find the end zone until there were just 2 minutes and 40 seconds left.

On the outside of the Dome, fans got into this one, too.

An airplane flew overhead with a sign that read 28-3. Merry Christmas — a reminder to Falcons fans of their team's collapse 10 months ago in Super Bowl LI.

The 610 Stompers, a local all-male dance group, did their part as well, dancing in a "28-3" formation during halftime, drawing a loud cheer from the crowd.

Having not defeated the Falcons in their previous three tries, Saints fans had very little trash-talk for the Falcons other than 28-3.  

But now they do.

A win over Atlanta to secure the team's first playoff berth since 2013, which is the last time Morstead remembers the Dome being this loud.

"It was a great Christmas present," Morstead said.

A present from the Saints to their fans.

And a present from the fans to the Saints.

"Our fans deserved this win," Brees said. "They got this one for us."

Follow Rod Walker on Twitter, @rwalkeradvocate.