ABG is implemented with a low-power open source hardware single-board computer BealgeBoard [7] connected to a Speaker and a Wi-Fi Dongle. In this prototype of the system Beagleboard-xM C3 was used which carries 1 GHz ARM Cortex-A8 core processor and 512 MB RAM. The Bealge- Board runs a custom Ubuntu 11.4 operating system designed for the BealgeBoard. The system applications running in Ubuntu are programmed in C. X-Mini 2 Portable speakers with a frequency response up to 20 kHz were used for the audio playback. Belkin’s WLAN dongle is used in the ABGs as the WLAN interface. Our server application that controls the behaviour of the ABG listens for TCP connections via wireless ad-Hoc network for configuration and operational messages on port 9931. Each ABG’s IP address is manually configured so that they operate in the same subnet. This allows multiple ABGs to communicate with each other and the user interfacing with the ABG Configuration Console on a computer.