Midfielder speaks ahead of Bees clash
The Canaries have endured a poor run of form, slipping to eight defeats in the last ten games having initially started the campaign strongly.
Speaking to the media at Colney Training Centre on Friday, Tettey said: "The fans pay to see us and are allowed to have their opinions.
"The first ten games we were winning and the confidence was there. Since then we've played games where confidence has been low and haven't played well.
"We've made mistakes and not had much luck, so there's been a few things. We are working hard and trying different things to fix it; that's what we're doing now, together.
"I completely understand the fans and as players we have to make them happy by winning games."
The Norwegian international midfielder knows Alex Neil's side must improve quickly, but believes there is currently little separating the margins between success and failure.
"In the Premier League you know there will be runs where you don't win games," the 30-year-old explained.
"We didn't expect that in the Championship, we should be doing better. The manager isn't on the field; it's the players' jobs out there and we believe in him.
"It's about small things and if they turn in our favour we'll win a couple of games. There's nowhere to hide because we know we must play better, individually and collectively, to get out of this situation.
"Brentford will be a difficult game but we are hungry for the win. We're looking for that to help us turn things around."