I. System Positioning
The public address system is the "sound nervous system" of parks, buildings, and residential communities. Its core mission isseamless in daily use, instant response in emergencies— playing background music and broadcasting announcements in daily operations to create a comfortable environment; switching to fire emergency broadcasting and security announcements within seconds during emergencies to guide evacuation and deter unlawful behavior. The system integrates "daily broadcasting + fire emergency + security linkage" into one, serving as a key information infrastructure for smart parks and smart communities.
II. Equipment Composition and Functions
| Equipment | Core Function | Selection Key Points |
|---|---|---|
| Power Amplifier | Amplifies audio signals to drive speakers | Selected based on power and zoning; supports constant voltage / constant impedance output; equipped with short-circuit and overload protection; networkable digital amplifiers available |
| Speaker (Loudspeaker) | Audio output terminal | Selected by scenario: wall-mounted speakers (indoor), column speakers (outdoor), ceiling speakers (ceiling), and landscape speakers (garden); waterproof and dustproof design |
| Microphone | Manual announcements and broadcast input | Desktop microphones, wireless microphones, and paging microphones; support priority broadcast preemption and one-key emergency announcements |
III. Core Functions
Daily background music and information broadcasting— Automatically plays background music at scheduled times in the morning, noon, and evening to create a relaxed and comfortable atmosphere; supports zoned broadcasting (e.g., different content in lobbies, corridors, conference rooms, and plazas), and broadcasts notices, paging, and courtesy reminders to enhance service quality
Emergency fire broadcasting— Linked with the fire alarm system; automatically switches to emergency broadcasting during a fire, broadcasting voice guidance such as "fire alarm, evacuate in an orderly manner" by zone according to evacuation plans, coordinating with emergency lighting to organize safe evacuation, and meeting fire safety regulations for emergency broadcasting
Security announcements and deterrence— Linked with video surveillance; duty personnel can make one-key announcements upon detecting anomalies, remotely warning and deterring suspicious individuals; during emergencies, real-time command and on-site order can be managed through broadcasting, achieving "see it, announce it, control it"
Priority preemption and emergency backup— Fire broadcasting and emergency announcements have the highest priority, automatically interrupting daily broadcasts; supports battery backup (UPS) and primary-backup switching to ensure reliable operation of the broadcasting system during emergencies
IV. Solution Advantages (Based on Yunzhi Company's Practice)
Leveraging its weak-current intelligent system integration capabilities, Yunzhi Company provides unified integration of public address systems with fire alarms, video surveillance, and security announcements, enabling integrated management of "fire-linked emergency broadcasting + surveillance-linked security announcements." This has been implemented in projects such as parks, residential communities, and office buildings, helping customers build a safe, comfortable, and efficient sound service and emergency response system.