Democratic Public Address (DPA) systemis
Chalie DeTar

The Democratic Public Address system is a distributed mesh network of decidedly inexpensive speaker nodes that play audio messages. Each node contains a microphone and speaker, and can be used to program the message that will be rebroadcast by the network. With the DPA, it is possible to easily and quickly deploy a freely accessible messaging platform in public spaces. Nodes are cheap enough that the deployments can be considered disposable, and usable in spaces where authoritarian presences restrict democratic speech.