records used in radio stations can suffer cue burn, which results from disc jockeys placing the needle at the beginning of a track, turning the record back and forth to find the exact start of the music, then backing up about a quarter turn, so that when it is released the music will start immediately after the fraction of a second needed for the disc to come up to full speed. when this is done repeatedly, the affected part of the groove is heavily worn and a hissing sound will be noticeable at the start of the track.