ADVANCED VOICE ALARM SYSTEM WITH SPECIALIZED TUNNEL LOUDSPEAKERS
ADVANCED DSP FOR BEST AUDIO TRANSMISSION IN HARSH ACOUSTIC CONDITIONS
COMMUNICATION REDUNDANCY BETWEEN CONTROL UNITS AND FIREMAN MICROPHONE
DISTRIBUTED INTELLIGENCE OF THE SYSTEM
FLEXIBLE AND SCALABLE CONFIGURATION
SPECIALLY DESIGNED FOR TUNNEL APPLICATIONS
HIGHLY DIRECTIONAL ASYMMETRIC HORN
EXCELLENT SPEECH INTELLIGIBILITY
STAINLESS STEEL CONSTRUCTION
In case of an emergency, the Voice Alarm System needs to guide people in the tunnel to safety so the audio transmission should be as clear as possible. In general, due to high levels of reverberation and noise, a tunnel is not an ideal environment for Voice Alarm System and therefore speech intelligibility becomes a critical parameter for any voice alarm application.
To establish a sufficient level of speech intelligibility, a highly directional speakers system is required. By reducing the energy emitted to other surfaces, reflective sound energy can be minimized which results in a better direct to reverberant ratio. This will improve the maximum feasible speech intelligibility. To minimize disturbing echo effects, resulting in a loss of speech intelligibility, each horn speaker is driven by an individual signal channel in a 100 V installation, which is equipped with audio DSP including EQ and delay. Our product S4T (Safety For Tunnel) offers the most effective solution which seamlessly combines a dedicated VES with tailored Tunnel Loudspeakers.