This sound modification replaces the original helicopter blade sound effects in the game with a low "hum/whine" like that of a real operating helicopter interior. For specific use with the First Person Mod to make helicopter flying a more immersive experience. Inspiration taken from numerous ridealong videos such as ones with the Los Angeles Police Department Air Support Division. Real-life sound is the interior of a Eurocopter AS350B2 helicopter in flight.
Video preview:
http://youtu.be/xLJW_Agl0Yk