Which of the following is NOT part of an audio or visual notification device?

The correct answer highlights that a pull station is not part of an audio or visual notification device. Audio and visual notification devices are designed to alert occupants of a building about fire alarms or other emergency situations through sound and light signals.

A strobe light serves as a visual alert by emitting bright flashes of light, ensuring individuals, including those who may be hearing impaired, can recognize an emergency situation. A speaker is used to broadcast audible alerts, providing important information regarding safety protocols or instructions during emergencies. An alarm bell also functions as a sound-based notification, indicating an emergency.

In contrast, a pull station is a manual device used to trigger the fire alarm system rather than to notify individuals of an existing alarm. Its purpose is to allow occupants to initiate the alarm when they detect a fire or emergency situation. Thus, it does not fit into the category of notification devices that are designed to communicate alerts to occupants during an emergency.