What is one-way voice communication used for in a building?

One-way voice communication is specifically designed for making announcements to building occupants. This system enables the efficient dissemination of important information in real-time, especially during emergencies. For instance, in the event of a fire alarm or other urgent situations, staff can use this system to instruct occupants on evacuation procedures, provide updates, and convey critical alerts. The one-way nature ensures that the message is delivered clearly and is intended for occupants to receive information without needing to respond back, which is essential for maintaining order and ensuring safety during emergencies.

The other choices do not accurately reflect the primary purpose of one-way voice communication within a building. While background music can enhance ambiance, it does not serve the crucial function of delivering urgent messages. Recording messages for later playback implies a two-way communication system, which is not the purpose here. Monitoring emergencies from a distance involves a different set of tools and systems that focus on surveillance and real-time incident assessment, which is again distinct from the one-way communication used for direct announcements.