The ExitPoint directional sounder model PF24V has an integral audio
amplifier that produces a pulsating sound consisting of broadband low-, mid- and high-range sounds. The broadband noise makes it possible to determine the location of the sound. There are four pulse patterns that can be used to create an egress pathway out of a building and to mark perimeter exits. In addition to the broadband noise, the sounder is capable of playing an alert message in the form of a recorded voice message or other audible signals.