Bosch Building Technologies has installed a digital public address and voice alarm system at Telford Shopping Centre in the United Kingdom. On 25 acres of commercial space, the IP-based Praesensa system from Bosch now provides music, announcements and emergency alerts for retail stores, restaurants, as well as hotels and a cinema. The shopping mall operator was looking to upgrade the existing public address system with a future-proof and IP-networked solution for retail environments with two key requirements: Heightening the centre’s sustainability and energy efficiency while keeping costs for the upgrade low.
Working with these requirements, Bosch partner North AVS refurbished all existing loudspeakers installed at Telford Centre across 16 zones via minor modifications on the end lines. As a result, system integrators merely needed to replace the obsolete control equipment – including a cumbersome call station with analog buttons – and amplifiers. Since the cost-effective upgrade, security staff at Telford Shopping Centre now control the public address system via an intuitive touch screen interface. Managed via OMNEO media networking technology, the software-based system combines live broadcasts and recordings from various media sources. The library includes background music in MP3 format, commercials from a message database, plus end-of-day mall closing messages on automated schedules. Automation also kicks in during an emergency, for instance in case of a fire: Targeted to specific zones on the property, the public address system integrates with the fire alarm system to play pre-recorded alerts and evacuation messages. Leaving full control to security, personnel can send live voice messages and manually trigger the evacuation protocol as needed at any time.
Sustainability and energy savings
The second main project parameter consisted of energy efficiency. As the latest in a long line of public address systems, Praesensa achieves a low energy footprint via smart power partitioning across amplifier channels. The software adapts intelligently to loudspeaker loads and divides the available output power across all channels to a maximum of 600 Watts. This built-in function significantly lowers overall power usage over the system’s lifetime, especially in the idle state where most systems spend most of their time. Requiring less battery standby, the system can run on only two batteries that need changing every four years according to British standards. Also contributing to the system’s low energy footprint is the minimized form factor: While the legacy system occupied two rack spaces in the server room, the new solution cuts the size in half. This is achieved by integrated standby amplifiers that reduce the cost – especially for cooling – and space of the rack housing. This also provides an effective redundancy measure. Praesensa also delivers automated fault notification to the control desk within 100 seconds, thereby meeting EN54-16 standards for public address systems.
Speaking of standards, the system meets the latest data protection guidelines as a fully secure IP solution: All control equipment is connected via Secure IP out of the box. Safeguards include encryption and authentication for complete protection against eavesdropping and hacking. With immediate cost savings in a future-proof, user-friendly, flexible and scalable package, the system is generating interest and positive user feedback from shopping mall operators.
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Media contact
Rebecca Morpeth Spayne,
Editor, Security Portfolio
Tel: +44 (0) 1622 823 922
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