Electroacoustic Emergency Warning System (ENS)/Voice Alarm System (SAA):
The first step is to determine whether the system is an electroacoustic emergency warning system (AT: ENS, DE: SAA) that complies with current standards or a standard public address system.
The ENS/SAA is connected to the building's safety systems (fire alarm system) and serves as an alarm and notification device for the fire alarm control panel in the event of an alarm, while the public address system is part of the multimedia system and is used for music playback. The ENS/SAA can also be used for music playback.
If an ENS/SAA system is installed, it is controlled by the fire alarm system via the fire control panel (FCP) for automatic evacuation, among other functions.
The ENS control panel should comply with EN 60849 and EN 54-16 (fail-safe amplifiers, emergency power supply, line monitoring, ...), the loudspeakers to EN 54-24, and the cabling to TRVB S 158, Section 8 (E 30, alternating, ...).
The EASE Evac program is used for the sound reinforcement calculation.
The floor plan is imported into the EASE Evac program in DXF format (DXF export from Revit), and the rooms are created. The actual heights and wall materials are specified for each room, and then a speaker grid is defined with the actual specifications, depending on the type and manufacturer.
- Import floor plan in DXF format
- Create rooms, including actual heights and wall materials
- Define speaker grid
The speaker grid is configured to meet the specified volume levels in decibels and the Speech Transmission Index (STI). If these values are met, the resulting grid is generated in Revit.
The design of the speakers in the individual planning phases is similar to that described in the article on communication.