jones_supa writes: North Korea has expanded its own loudspeaker broadcasts along the inter-Korean border as a counteraction to South Korea's retaliatory broadcasts critical of the communist nation, sources said Monday. In retaliation for North's nuclear test last Wednesday, South resumed its anti-Pyongyang broadcast campaign two days later, a form of psychological warfare detested by the communist country, where outside information is tightly blocked out. "The North initially operated its own loudspeakers at two locations and has now expanded to several locations," a government source said. "In fact, the anti-South loudspeaker broadcasts appear to be coming from every location where we are broadcasting." The North Korean broadcasts are not clearly audible from the South Korean side of the border, but mostly deal with internal propaganda messages and music promoting its leader Kim Jong-un. "We are not sure if it's an issue of electric power or the performance of the loudspeakers, but the sound is very weak," another government source said.