Voice Alarm Systems (EN54)

Safety that saves lives. Clear communication in critical situations.

Voice Alarm Systems

Voice Alarm Systems are sound transmission systems whose main purpose is to alert, in an unequivocal way and in the shortest possible time, the occupants of a building or venue to an emergency situation, enabling an orderly and safe evacuation.

Safety and Compliance EN 54

At InteliAV, we design, supply, and install voice evacuation systems in full accordance with the  European Standard EN 54, ensuring maximum reliability, intelligibility, and safety.

What is a Voice Alarm System?

A Voice Alarm System (EVAC) is a professional audio infrastructure that broadcasts alert and guidance messages in emergency situations such as fires, bomb threats, or other critical events. These systems can also be used to broadcast commercial messages, paging, and background music under normal operating conditions.

Why a Voice Evacuation System?

Clarity and Intelligibility

Unlike traditional sirens, voice evacuation systems deliver clear and specific messages, reducing panic and guiding people effectively.

Legal Compliance

Mandatory in highoccupancy buildings such as shopping centres, hospitals, hotels, airports, transport hubs, and corporate buildings.

Fast and Coordinated Response

Allows different zones of the building to be alerted independently and in a coordinated way, optimising the evacuation process.

MultiFunctionality

Beyond the emergency function, the system can be used for internal communication, background music, and commercial announcements.

Essential Technical Characteristics

Emergency Microphone

The microphone must have absolute priority over all audio inputs, including prerecorded messages. As soon as the microphone is activated, all other audio sources are muted. Where more than one emergency microphone exists, a priority rule must be defined.

Redundant Amplifiers

In the event of a control system failure, there must be amplifier redundancy to ensure continuous system operation.

Redundant Loudspeaker Lines

Loudspeaker lines must always be in perfect working condition. Regular preventive maintenance is recommended to ensure there are no failures in an emergency.

Autonomous Power Supplies

In the event of a power failure, the power supplies ensure system continuity for a minimum period of 24 hours in standby mode and 30 minutes in evacuation mode.

Intelligibility and Sound Pressure

Intelligibility is a critical factor for system effectiveness. Voice evacuation systems should achieve a minimum  0.50 STIPA (Speech Transmission Index – Public Address), ensuring that messages are understood even in noisy environments.

In areas with high background noise, the sound pressure level must be at least  6 dB above  the ambient noise level so that the sound remains audible. Visual signalling can be used as a complement to audible signalling in areas where occupants may not be able to hear the alerts.

Compliance with the EN 54 Standard

The  European Standard EN 54  defines the technical and performance requirements for fire detection and fire alarm systems, including voice evacuation systems. Compliance with this standard is mandatory in publicuse buildings and guarantees:

Reliability: Tested and certified equipment.

Safety: Guaranteed operation under critical conditions.

Legal Compliance: Fulfilment of national and European regulatory requirements.

What InteliAV delivers

As specialists in voice evacuation systems,  InteliAV  ensures a complete implementation in full compliance with the  EN 54 Standard :

Consultancy and Design

We analyse the space, architecture, ambient noise levels, and legal requirements to design the ideal system, ensuring full coverage and intelligibility in every zone.

Commissioning and Testing

We carry out full functional tests, intelligibility tests (STIPA), and sound pressure measurements to ensure the system meets all regulatory requirements.

Supply of Certified Equipment

We work exclusively with  EN 54certified manufacturers, guaranteeing quality, reliability, and legal compliance.

Training

We ensure that operators and safety managers fully understand how to use the system, from zone management to triggering emergency messages.

Professional Installation

Our specialised teams ensure precise installation: structured cabling, secure mounting, audio calibration, and intelligibility testing.

Preventive Maintenance and Periodic Inspections

We offer preventive maintenance contracts and annual inspections to guarantee longterm system reliability and performance.

Benefits for Your Organisation

People Safety: Protection of lives in emergency situations.

Legal Compliance: Fulfilment of national and European regulatory requirements.

Orderly Evacuation: Clear messages reduce panic and guide people effectively.

Multi-Purpose Use: Can be used for background music, announcements, and internal communication under normal conditions.

Proven Reliability: Systems tested and certified according to the EN 54 Standard.

Where are Voice Evacuation Systems Used?

Shopping Centres and Retail: Safe evacuation of large numbers of people.

Hospitals and Clinics: Protection of patients, visitors, and staff.

Hotels and Resorts: Guest safety and legal compliance.

Airports and Transport Stations: Emergency management in high-traffic environments.

Corporate Buildings: Protection of employees and visitors.

Schools and Universities: Safety for students, teachers, and staff.

Stadiums and Arenas: Coordinated evacuation of large crowds.

Churches and Cultural Venues: Protection of worshippers and visitors.

Protect people in your spaces. Ensure legal compliance.