1. A system for communicating between a building and a first responder, the system comprising: a plurality of sensors, each of the plurality of sensors being in a fixed position in the building and configured to sense sound within an environment of the building, and to transmit a sense signal representing the sensed sound, each of the plurality of sensors having a sensor processor to filter the sensed sound to determine a particular sound from the fixed position; one or more repeaters, configured to receive the sense signals from the sensors and to transmit repeated sense signals representing the sensed sound; a processor, configured to receive the repeated sense signals and determine that a predetermined amount of time has passed since the sense signal was generated, and to transmit an output signal based at least in part on one or more of the repeated sense signals and at least in part on the predetermined amount of time; and one or more output devices configured to receive the output signal and to communicate information associated with the sensed sound and fixed position based on the output signal.
