Case 1: Three ABGs in Three Different Rooms This scenario evaluates the system in an environment where there are multiple isolated rooms. We consider three connected rooms, each with its own dedicated ABG configured to broadcast the service code of the service available in its room. The ABGs are configured to operate in individual mode. Values of different parameters are recorded on selected locations in the floor. Case 2: Three ABGs in One Large Room We can easily isolate rooms and their respective services by installing one ABG in each room, but it is important to evaluate if the system can still work in a large room with different cubicles and section separated by small wooden walls or open spaces. As the sound waves reflect and diffract with the environment they can reach almost everywhere if there is a small gap to let the sound waves traverse through. For the system to work properly, it is important that the amplitude of the received signal on the client side is at least higher than a threshold value in the operating zone. To carry out the test, three ABGs were placed in our lab which has three sections separated by two half high plastic and metal walls. Fourteen spots were chosen in the room to evaluate the matrices, in group mode.