Which of the following is NOT an example of audible information relaying to responding units?

Audible information refers to sounds that convey messages or alerts to responding units, allowing them to quickly understand the situation and take appropriate action. The correct choice, which is a scrolling message board, does not qualify as audible information because it communicates through visual means rather than sound.

Options like a vocal alarm, station bell, and siren all produce sounds intended to alert or inform firefighting personnel of an emergency, enabling them to respond promptly. These methods rely on auditory cues, which are crucial in an environment where rapid situational awareness can be critical for safety and effectiveness during emergency response operations.