well, a ford dealer mechanic said the nose comes from (he thinks) the AWD drive train, and that it is "normal."  I do not agree.  The service manager said they cant do anything unless it gets worse?!?!   
  
Is anybody with an AWD edge hear this sound?  a faint whistle like a bomb falling sound effect.  It seems to get louder with trip duration.  Suggestions?   
  
Thanks.