Explicit language is heard with greater, albeit varying, frequency on cable television, the Internet, and satellite radio, which do not use public airwaves.

CNN: High court rules for broadcasters on TV 'indecency'

At the time, prosecutors allege, Mrs Heidrun was sitting in her study in front of a wireless transmitter that was receiving encoded messages on a shortwave frequency and was hooked up by cable to a computer, reports the German news website Spiegel Online.

BBC: Russia 'spies' go on trial in Germany