Radio jamming in China

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Radio jamming in the China is a form of media censorship that involves deliberate attempts by state or Communist Party organs to interfere with radio broadcasts. In most instances, radio jamming targets foreign broadcasters, including (but not limited to) Voice of America, Radio Free Asia and the BBC World Service, as well as stations based in Taiwan.

Methods[edit]

The Firedrake shortwave jammer, finishing its broadcast over Radio Free Asia on 13675 kHz.

Radio jamming is achieved by transmitting radio signals on the same frequency as the intended target. 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 composed of Chinese folk music, specifically a composition known as The Firedrake, running about 1 hour in duration. The 60 min audio clip is broadcast over spread spectrum throughout almost the entire shortwave radio band. It is being streamed though the "Sat 6B" that was launched in 2007. There are also Highquality recordings (mono) existing on the internet. [2]

The French defense electronics company Thales Group has been accused of aiding Chinese censorship efforts by selling shortwave broadcasting equipment to Chinese authorities. The firm has responded that the sale of equipment was intended for civil purposes.[3]

Targets[edit]

Since broadcasting began in 1996, Chinese authorities have consistently jammed Radio Free Asia broadcasts.[4] In 2002, the Broadcasting Board of Governors reported that "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.[5]

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.[1]

Other targets for jamming include the BBC World Service, and Sound of Hope radio network.[6]

Response[edit]

In 2011, some international radio broadcasters, including the BBC and VOA, announced plans to scale down or close their Mandarin shortwave service for China due to spending cuts and frustrations caused by jamming efforts[7][8] BBC and VOA instead chose to invest more heavily in internet radio; both received financial support from the U.S. Department of State to fund and research internet censorship-circumvention software, such as Freegate and Ultrasurf, to enable their Chinese audience to access their programs online.[9][10]

Broadcasters have also sought to educate their audiences on the use of anti-jamming technology.[11]

Selection songs[edit]

  • Feng Shou Luo Gu - Drum & Gong for Harvest - Harvest Festival music, being orchestrated with Chinese Flute, Gong, Erhu Fiddle, Drums . Duration : about 1 hour per set (often repeated).

See also[edit]

References[edit]