A low-power FM transmitter broadcasts the audio for a film directly to the car radios of patrons. This allows viewers to enjoy the movie’s soundtrack with optimal sound quality from the privacy and comfort of their vehicles. For example, a designated frequency, such as 88.1 FM, might be advertised on the screen or announced upon arrival, enabling attendees to tune their car radios accordingly.
This technology is essential to the drive-in cinema experience. It provides a superior alternative to older, less effective methods of sound delivery, such as speakers mounted on individual posts, which often suffered from poor sound quality and uneven distribution. Historically, these dedicated audio broadcasts became commonplace as car radios became increasingly prevalent, contributing significantly to the popularity and longevity of drive-in theaters. The system facilitates a collective viewing experience while respecting the individual space of each vehicle.