The Ravens are about to embark on a stretch of four road games in their next five contests.
The loudest of which may come this Sunday in Indianapolis, where the AFC South's first-place Colts play in Lucas Oil Stadium's dome.
Ravens Head Coach John Harbaugh joked on Monday that he'll be keeping an ear out to determine whether it's extra noisy.
"We'll have to work on the crowd noise," Harbaugh said.
"We had a loud stadium in Cleveland and it's only going to be louder in Indianapolis. Rumor has it they pipe crowd noise in there. We'll see if that's the case or not."
Harbaugh smiled when talking about the rumors.
Rumors began in 2007 when the Colts were playing in the RCA Dome. There was audio of the Indianapolis crowd being much louder when Patriots quarterback Tom Brady was at the line of scrimmage, but it died down once the play was completed. CBS-TV later took credit for the audio discrepancy.
Harbaugh was asked whether pumping artificial crowd noise into the stadium is illegal.
"Yes, it is," he said. "It's a rumor. It's a rumor."
Then Harbaugh smiled and looked into the cameras to deliver a message to former Ravens defensive coordinator and current Colts Head Coach Chuck Pagano.
"Sorry Chuck," Harbaugh said.
The Ravens won their only game on the road so far this year, beating the Browns in Cleveland, 23-21. It's more difficult for offenses, especially, to play on the road because crowd noise makes communication difficult.
Baltimore's offense has been impressive during the first quarter of the year, and they will face the road challenge as they travel to Indianapolis, Tampa Bay and Cincinnati.
"We're used to the traveling, we're used to the hotel rooms. All that's fine," Harbaugh said.
"The challenge is you have to go play another team in that environment, and that takes an incredible amount of discipline and poise. The more disciplined we are, the more able we are to execute and tune out the noise, so to speak."
