EN 54 Certified Voice Alarm Emergency Evacuation System
This TOA VM-3000 series voice alarm system is an integrated general announcement and emergency broadcast system. The voice alarm system amplifier that plays the central role in the system is the 240W version, VM-3240VA. Using this amplifier in conjunction with the VM-3240E (240W) extension amplifiers allows larger systems to be built for sizable applications.
Distributing Clear Paging and BGM Sound
For paging to be effective, announcements must be audible. Broadcasting at the proper volume (about 15 dB higher than the ambient noise level) and frequency range (bandwidth of approx. 200 to 7kHz, which distinguishes the consonants and vowels) ensures that the announcements can be heard clearly. The key considerations of designing a good system are clear sound, correct functions, ease of installation and maintenance, durability and reliability, and flexibility for future expansion and changes.
Paging Functions and BGM (Background Music) Functions
The purpose of announcements is to quickly and accurately relay information and messages needed in particular locations. Large facilities like factories are divided into functional areas, each with its required announcements needed. In order for different announcements to be made simultaneously in multiple areas, the sound system needs a matrix function of voice inputs and outputs, including a separate speaker zone for each area and microphones that allow broadcasting zone selection. Background music (BGM), much like architecture, design, lighting, and space, is used to create a comfortable atmosphere in line with the particular needs of the facility. In factories and offices, the productivity can be increased by background music. BGM must also automatically decrease in volume to give priority to important announcements and emergency messages.
Broadcasting an Effective Voice Alarm in an Emergency
Human life is the most important issue in any case. Therefore, the method of risk management and safety control must be considered and provided. Facilities with safety systems give people a sense of security. This voice alarm system provides comfort and reduces the loss of life and property in a disaster. In case of a disaster such as a fire, the sound system will give instructions for emergency evacuation. Such an emergency notice must interrupt other announcements and be given at a volume loud enough to be heard. A good voice alarm system functions effectively under various contingencies. Circuits are protected against breakdown, the system is automatically monitored at all times, and backup functions are in place. Since disasters are often accompanied by power failures, the system can be operated with emergency power sources, such as batteries. In the event of a disaster, the system can deliver pre-recorded emergency announcements in accordance with smoke detectors and other warning systems.
