*NBC’s “The Sing Off” is the lone music competition series on television where contestants are required to sing a cappella, and that aspect was a huge selling point for judge Shawn Stockman, who knows a thing or two about the importance of vocals.

He’s currently in his third season on the judging panel – alongside fellow vocalists Ben Folds and new judge Sara Bareilles – and says their collective experience lets contestants know that their comments – whether praise or criticism – are not just for show.

“A lot of the artists that are on the show, they recognize who we are and so it’s an automatic connection,” Stockman tells EURweb. “Not because of us being in the industry or being famous, but knowing that our story and where we’re speaking from is from a real place. So when we speak and when we give certain advice, they know that it’s from experienced eyes, ears and bodies.

“Knowing where we come from, they give their 100 percent. So when we give them additions to what can make their harmony better, they really take it to heart, and we always see them better and better with each week.”

Fresh from performing with his group Boyz II Men on Tuesday’s live “Dancing With the Stars,” Stockman 39, says there is no greater aural experience than hearing a chorus of voices harmonizing without the distraction of musical instruments. he explains below.

Shawn Stockman on the intangible power of a cappella by CherieNic