Two organizations promote volleyball for individuals with hearing impairments: The United States Deaf Volleyball Association (USDVA) and the American Deaf Volleyball Association (ADVA). The USDVA is a governing body of the United States Deaf Sports Federation and is responsible for player development and tournament play. The ADVA is a volunteer organization, which serves a dedicated membership consisting of recreational and competitive volleyball players who are hearing-impaired.
Both groups play under FIVB rules and use a red flag as a signaling device instead of a whistle.
For more information, contact the United States Deaf Sports Federation (USADSF) or the American Deaf Volleyball Association (ADVA).