The government of the People's Republic of China disrupts shortwave radio communications through this method, typically by broadcasting music, drumming, or other noise.
[1] On shortwave, the jamming sound is usually composed of Chinese folk music, specifically a composition known as The Firedrake, running one hour in duration.
[5] In 2002, the Broadcasting Board of Governors reported that "virtually all of VOA's and RFA's shortwave radio transmissions directed to China [...] are jammed," including their Mandarin, Cantonese, Tibetan, and Uyghur language services.
[6] In 2008, the Oslo-based Voice of Tibet reported that jamming of its radio communications intensified during the 2008 Tibetan unrest, as authorities increased the number of disrupted signals it employed to block outside transmissions.
[7] In 2011, some international radio broadcasters, including both the BBC and VOA, announced plans to scale down or close their Mandarin shortwave services for China due to spending cuts and frustrations caused by jamming efforts.