Most airlines also require passengers be at the boarding gate approximately 30 minutes before departure. As airport processing times vary, Delta's website suggests arriving at the airport three hours before international travel, while Virgin America recommends allowing two hours.
The film is projected with a movie projector onto a large projection screen at the front of the auditorium while the dialogue, sounds and music are played through a number of wall-mounted speakers. Since the 1970s, subwoofers have been used for low-pitched sounds.
The first trailer shown in a U.S. film theater was in November 1913, when Nils Granlund, the advertising manager for the Marcus Loew theater chain, produced a short promotional film for the musical The Pleasure Seekers, opening at the Winter Garden Theatre on Broadway.