Audiovisual, Digital Signage & Public-Address Integration

The audiovisual (AV), digital signage, and public-address (PA) layer is the set of low-voltage systems that move pictures, sound, and the spoken word through a hospital — from the conference-room display and the OR video-integration platform to the lobby wayfinding kiosk, the patient-room interactive TV, the code-blue overhead page, and the mass-notification announcement that has to reach every occupant in seconds. These systems sit on the structured-cabling and network backbone and increasingly run as software on the converged IP network, but they carry their own design rules, code obligations, and life-safety stakes that make them a distinct discipline from nurse call, security, and the data-center core.

Scope and how this differs from neighboring systems

AV / signage / PA is a broad family. The boundaries that matter for design and procurement:

In scope here: presentation and collaboration AV (conference rooms, boardrooms, auditoria, telemedicine/telehealth endpoints), clinical AV (OR video integration, procedural imaging routing, simulation labs, grand-rounds capture), patient-experience media (interactive patient TV, in-room education, entertainment, room-control tablets), digital signage and dynamic wayfinding, public-address and background-music/paging, mass notification and emergency communication systems (MNEC), and overhead clinical paging (code calls).
Adjacent — covered by sibling Articles, not here: nurse call and clinical-communications middleware (its own Article under UL 1069); RTLS, patient/infant elopement, and distributed antenna for cellular/public-safety coverage; access control, CCTV/video surveillance, and electronic security; and the structured cabling, telecom rooms, network core, and redundancy that all of the above depend on.

A recurring integration question is where one system ends and another begins — for example, an overhead "Code Blue, Room 4" announcement may originate in the nurse-call system, be brokered by clinical middleware, and be voiced through the public-address amplifiers. That hand-off is owned jointly, and the design must name the responsible system at each link so no announcement falls between vendors.

Governing codes, standards, and bodies

AV/signage/PA is not heavily code-driven the way fire alarm or medical gas is, except where it intersects life safety, accessibility, and emergency communication — and there it is governed tightly.

Authority / standard	What it governs for this Article
NFPA 72 — National Fire Alarm and Signaling Code	The controlling code for mass notification / emergency communication systems (MNEC) and any in-building emergency voice/alarm communication system (EVACS). Sets audibility and intelligibility requirements, risk-analysis basis for ECS, message priority, survivability of pathways, and how voice evacuation integrates with the fire alarm.
NFPA 101 — Life Safety Code & IBC	Occupancy-based requirements that drive where voice evacuation/ECS is required; coordination of signage, exit communication, and emergency messaging with the means of egress.
NFPA 99 — Health Care Facilities Code	Risk-category framework (Category 1–4) that influences which communication functions are mission-critical and how they are powered and backed up.
NFPA 110	Standards for the emergency power supply that backs life-safety-tied communication equipment.
NEC (NFPA 70), incl. Article 517 and Articles 725/760/770/800	Installation of low-voltage/limited-energy AV, signage, and PA cabling and power; Article 517 health-care electrical provisions; circuit classification (Class 2/3), fire-alarm circuits, optical fiber, and communications cabling.
ADA Standards for Accessible Design / ABA	Accessibility of signage (visual character sizing, contrast, mounting height, tactile/Braille for permanent room identification), assistive-listening systems in assembly areas, and accessible interactive kiosks/controls.
ANSI/TIA-568 / TIA-569 / TIA-862 / TIA-606	Structured cabling, pathways and spaces, intelligent-building/building-automation cabling, and administration/labeling that AV and signage ride on.
HIPAA / HITECH	Privacy and security obligations on any AV that captures, displays, transmits, or stores protected health information (PHI) — telemedicine recordings, OR video, in-room cameras, signage that displays patient names/queues.
CMS Conditions of Participation; TJC / DNV; FGI Guidelines	Accreditation and design-guideline expectations that touch communication reliability, emergency-management messaging, patient privacy, and patient-experience provisions.
AHJ (local fire marshal, building department) and, in some jurisdictions, state design-review bodies (e.g., HCAI/OSHPD in California)	Final acceptance of voice evacuation/ECS audibility and intelligibility; sign-off on emergency communication; jurisdiction-specific requirements.
UL listings (e.g., UL 864 for fire/ECS control units, UL 2572 for MNEC)	Equipment listing for life-safety-coupled communication systems.

The single most consequential point: any emergency communication, voice evacuation, or mass-notification function is a fire-alarm/life-safety system under NFPA 72 — not a "PA system" — and inherits that code's listing, survivability, power, and acceptance-testing regime. General music/paging is not, but the two often share speakers and zones, which forces careful design so that an emergency message always overrides background audio with correct priority.

Public-address, paging, and overhead clinical communication

Hospitals run several overlapping audio-distribution needs, and good design separates them by priority and zone rather than running one undifferentiated "PA."

Background music and general paging — lobbies, cafeterias, corridors, waiting areas. Low priority; provides ambiance and routine announcements ("Will the owner of vehicle…").
Overhead clinical paging / code calls — "Code Blue," "Code Red," "Rapid Response," "Dr. Strong," and similar. These are operationally critical and often plain-language per The Joint Commission's preference for plain-language emergency codes. They frequently originate from nurse call, telephony, or a code-call panel and are voiced through the paging amplifiers. Their priority must sit above background audio but be coordinated with emergency voice evacuation.
Emergency voice/alarm communication (EVACS) and mass notification (MNEC) — the highest priority. On fire alarm or an ECS event, these must seize the relevant zones, mute lower-priority audio, and deliver an intelligible live or recorded message.

Design implications:

Zoning is the core design act. Audio is divided into zones (by floor, department, building, exterior) so that a localized event pages only where needed and a global event reaches everyone. Zone boundaries should align with smoke compartments and fire-alarm notification zones where the system is life-safety-coupled.
Priority and override logic must be explicitly specified: emergency > code page > general page > background music. The matrix of who can override whom, from which input, into which zones, is a design deliverable, not an installer decision.
Intelligibility, not just audibility, governs any voice-evacuation/ECS speaker layout. NFPA 72 requires measurable speech intelligibility (commonly evaluated via STI/CIS metrics) in occupiable areas. This drives speaker spacing, tap settings, ceiling height assumptions, and acoustic treatment — and it is verified at acceptance, frequently with the fire marshal present.
Sensitive areas — operating rooms, NICUs, ICUs, sleep labs, behavioral-health units, imaging suites — often require paging suppression or visual-only signaling during procedures or quiet hours. The design must let these zones be excluded from non-emergency paging while never being excluded from true emergency notification.