If you manage safety and public address systems for a station, platform, depot or transport hub, you’re likely dealing with a problem directional audio was built to solve : announcements and safety messages need to reach the right zone clearly, without adding to the general noise of a busy environment or becoming unintelligible as they echo across open platforms and concourses.

Most safety managers have never been told this technology exists as an option. It isn’t a niche product — it’s a proven way to deliver critical announcements to a specific platform, gate or zone without the audio spreading, distorting or clashing with announcements in an adjacent area. We have installed speakers in Eurostar’s St Pancras station and are currently testing across several UK airports.

Why directional audio matters for transit safety

• Zone-specific announcements. A platform, gate or concourse zone can receive its own announcement without it overlapping with the next platform’s message — critical when different platforms need different instructions simultaneously (e.g. an evacuation on one platform while normal service continues on another).
• Better intelligibility in noisy, reverberant spaces. Open stations and platforms are acoustically difficult — sound reflects off hard surfaces and glazing. Directional audio reduces the reflected, overlapping sound that makes announcements hard to understand.
• Reduced overall noise footprint. Concentrating sound where it’s needed, rather than broadcasting it across an entire concourse, lowers the ambient noise level for staff and passengers not in the target zone.
• Works alongside existing PA/VA systems. Directional speakers can supplement an existing voice alarm or public address system for specific problem zones rather than requiring a full system replacement.

Which technology fits a transit environment

• Beamforming (phased array) speakers are generally the best fit for platforms and concourses — they cover a defined zone with natural, intelligible sound and can often be adjusted electronically to fine-tune coverage after installation, which matters in spaces where layouts and platform use can change.
• Ultrasonic speakers suit gate areas, ticket halls and corridors where an unobtrusive mounted speaker is needed alongside signage or architecture to provide safety warnings or specific instructions.
• Dome/localizer speakers suit waiting areas, information points and ticket counters where a fixed zone of coverage is sufficient.

See our full directional speaker technology guide for how each technology performs in reverberant, high-noise environments specifically.

A different kind of specification problem

Transit and safety installations typically involve compliance requirements, integration with existing voice alarm systems, and sign-off from multiple stakeholders — this isn’t a like-for-like swap of one speaker for another. Because we test every directional speaker that comes to market and hold the largest product list in the category, we can help identify which specific models meet the acoustic performance and intelligibility standards your project requires, rather than starting from a single manufacturer’s catalogue.

Frequently asked questions

What is directional audio and why hasn’t our current system used it? Directional audio focuses sound into a defined zone rather than broadcasting it in all directions. Most PA/VA systems installed to date have used conventional speakers because directional technology is still not widely known outside specialist audio circles — it’s a genuine option, not an emerging or unproven one.

Can directional speakers integrate with our existing voice alarm system? In many cases, yes — directional speakers can supplement problem zones within an existing VA/PA system rather than requiring full replacement. Compatibility depends on your existing system and should be assessed project by project.

Will directional audio meet public safety announcement intelligibility standards? Directional audio is generally used specifically to improve intelligibility in reverberant spaces where conventional speakers struggle. Any installation for safety-critical announcements should still be tested and verified against the relevant standard for your site.

Can different platforms or zones receive different announcements at the same time without overlap? Yes — this is one of the core strengths of directional audio, and a common reason transit operators adopt it: adjacent zones can run independent announcements without audible clash.

Is this suitable for outdoor or semi-covered platforms? Yes, though technology choice matters — beamforming systems generally handle outdoor and semi-outdoor environments better than more wind- and air-sensitive formats. We can advise on the right choice for your specific platform conditions.