Manchester United goalkeeper Ben Foster says he struggled to communicate with his team-mates amid the noise in the Inonu Stadium.
United battled to a 1-0 away win over Besiktas in their opening UEFA Champions League game as Paul Scholes headed a second-half winner.
It was an unconvincing yet clinical performance from last season's finalists but Foster admits that communication was a problem as the home fans made Istanbul a fortress on the night.
"It was deafening," said the 26-year-old. "I have never played in an atmosphere like it.
"There was a point in the second half when the fans were chanting and I couldn't hear myself think.
"It is a bit of a frightening and disorientating experience. You cannot talk to your defenders and they cannot talk to each other.
"It is strange and hard. They were shouting things to me but I just told them there was no point because I couldn't hear a thing."
Sir Alex Ferguson's side have won four games on the spin and this weekend face Manchester City, who have won each of their four Premier League games this season.
City have been in the headlines this week after their controversial 4-2 defeat of Arsenal on Saturday, and face another huge task in taking on the champions this Sunday.
However, Foster insists this derby will be treated no differently to any of their previous meetings, despite City's new-found title hopes.
"It is always the way that United want to beat City and vice versa, so the situation this season is no different," said Foster.
"But with the money they have been spending it does add a little bit of spice to it all. They have got off to a good start so it will be tough but we seem to have come into a bit of form ourselves.
"Hopefully that will be good enough."