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Aiding evacuation

EVAC-compliant voice alarm The Plena Voice Alarm System is designed for emergency evacuation in applications where compliance to internationally recognised standards like IEC60849 is required. All the essential EVAC functionality - such as system supervision, loudspeaker line surveillance, spare amplifier switching, digital message management and a fireman's panel - is built in.

Based on the six-zone LBB 1990/00 system controller with separate call and background music (BGM) channels, a Plena Voice Alarm System can be easily expanded to up to 60 zones using additional six-zone routers. It is completely compatible with Plena Public Address equipment and Bosch EVAC-compliant loudspeakers and accessories.

Schools and universities are typical examples of applications with a large number of zones each with a relatively low output power requirement per zone. The main priorities are speech intelligibility and compliance with IEC60849 standard (or equivalent).

In addition to mandatory voice alarm functionality for evacuating staff and students, EVAC systems for schools and universities should also include chime tones for notifying the start/finish of lessons, plus public address functionality for individually calling classrooms or public area. BGM is not essential. Since a classroom has a low ambient noise level, one loudspeaker is usually sufficient, keeping the total power requirement relatively low. Outside areas such as playgrounds and sportsfields will require weatherproof horn loudspeakers.

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