Voice is a 2005 South Korean horror film, and the fourth installment of the Whispering Corridors film series. The film was the debut film for its three young actresses, as well as director Choi Ik-Hwan, who had served as an assistant director on the first film of the series.

Whispering Corridors is a 1998 South Korean supernatural horror film directed and co-written by Park Ki-hyung. It was part of the explosion in South Korean cinema following the liberalization of censorship in the aftermath of the end of the country's military dictatorship. The film makes a social commentary on authoritarianism and conformity in the harsh South Korean education system.