On the windswept shores of Taiwan’s front-lying island of Kinmen, there are two huge walls of speakers which face the southern shore of China, several kilometers across the water. The concrete structures are each about three stories tall and have 48 holes, each containing a speaker. At one time, these were some of the largest and loudest speakers in the world… which could be heard up to 25 kilometers away.

I’m Andrew Ryan and in today’s Ear to the Ground, we turn back time to listen to what was once one of Taiwan’s most important propaganda tool in the cold war with China.