The ability to communicate clearly during a fire or emergency situation is just as important as detecting the fire or threat itself. Traditional tone-only sounders have served the industry well, but voice-enabled alarm devices are increasingly recognised as a more effective way to prompt a fast, controlled response. This is where C-TEC’s CAST powered open-protocol addressable voice sounders come into their own.
More than just an alarm
The greatest strength of a voice sounder is simple: people respond better to a clear instruction than an unfamiliar alarm tone.
C-TEC’s CAST-powered voice sounders combine high-performance audible alarms with clear pre-recorded messages, helping building occupants immediately understand what action to take. Instead of relying solely on a siren, people at risk receive an intelligible voice message directing them to evacuate safely and calmly.
In busy commercial buildings, schools, healthcare environments, public spaces and residential properties, C-TEC’s voice sounders help reduce confusion and support a more orderly evacuation process.
Many thousands of C-TEC voice sounders have been installed across the globe. Although most are used to boost the alarm capabilities of fire detection and alarm systems, the passing of Martyn’s Law in 2025 – officially known as The Terrorism (Protection of Premises) Act – has seen an increasing number being used as part of a ‘Lockdown’ system. Our HUSH-PRO voice variants (also powered by our CAST protocol) are also popular in residential settings such as student accommodation, flats and apartments.
Voice sounders are among the most safety-critical devices on a fire system and ensuring dependable operation is essential. As part of the wider CAST ecosystem, C-TEC’s voice sounders benefit from the same advanced hard-wired and reliable technology, providing specifiers and installers with confidence that the messages people hear during an emergency will be delivered clearly when it matters most.
Flexibility for modern buildings
No two projects are identical. Some require simple alarm signalling, others benefit from more sophisticated evacuation messaging. Our CAST protocol voice sounders provide a flexible solution that enables system designers to deliver enhanced occupant communication without introducing unnecessary complexity. As well as standard voice messages, custom or coded messages can be arranged to special order.
Multiple CAST protocol voice variants are available from ‘base‘ sounders that are designed to fit under our CAST fire detectors to stand-alone wall-mounting ‘hi-output’ devices for use in larger areas. Arguably our stand-out voice variants are the ones featured in our award-winning multiple EN-54 certified CAST-PRO range, which in 2025 won two major Innovation of the Year awards. These devices can combine the functions of not just a voice alarm, but also heat, smoke and CO fire detection plus a C-3-9.4 rated visual alarm device (VAD) in one attractive compact housing.
In a nutshell, C-TEC’s CAST-powered voice sounders represent the evolution of alarm notification. They provide clear voice instructions that help occupants react quickly and appropriately during an emergency.
Want to know more? Contact your account manager today!