New kind of sound equipment for square dancing promises less noise

In an effort to maintain square dancing as a positive exercise in urban communities, China's social sports governing body on Wednesday introduced a set of less-disturbing audio equipment specially designed for the activity.

The equipment package, called an "intelligent dancing solution" by its designer, Gongwu Sports, was unveiled by the Social Sports Instruction Center of China at the launch ceremony of the National Square Dance Championship on Wednesday.

At the core of the package is a set of directional loudspeakers that limit the transmission of sound waves to a finite space. The speakers are heard only by dancers inside the acoustic zone, without spreading noise all around.