PAVA System

Representing the cutting edge of audio technology, voice alarm systems provide the highest quality audio equipment using the latest digital techniques for greater reliability, ease of operation and simplicity of configuration. Voice alarm systems are recommended for all public buildings and multi-story buildings over four floors. Voice Alarm (VA) systems are the quickest way to evacuate the public & staff from a building.Following fire detection, automated messages control the flow of people in stair wells and corridors allowing an orderly evacuation without panic. These messages are supplemented by spoken messages from the fire service or management suite confirming the validity and need to leave the building. This positive confirmation speeds evacuation and avoids the “false alarm” mentality reducing the risk of death from fire.

PAVA System
PAVA System

PAVA system – requirements

LOUDSPEAKER LINES

  • Supervising lines – controlled break and short circuit
  • Systems with high impedance speaker – 100 V technology
  • Long wire – less value of the electric current
  • Simple installation – (different types of speakers with various loads can be connected to the same line
  • Allowable voltage drop – 10%
  • Fireproof cables
  • Damage to a single circuit should not cause total loss of coverage (wiring redundancy)
  • Appropriately designed zones
  • Different speaker lines in fire zones and loudspeaker zones

DEVICES

  • Controlled all system components
  • Control units and amplifiers comply with the EN 54-16 requirements
  • Power supply units comply with the EN 54-4 requirements
  • Loudspeakers comply with the EN 54-24 requirements

MESSAGES

  • Ability to play different messages to different zones at the same time – sequences of announcements
  • EVAC, ALERT, CODED, and INFORMATION messages
  • The aim of the broadcast message is not to inform people about the problem threat, but to force them to take action related to the evacuation.

SPL (Sound Pressure Level)

  • Absolute minimum sound level – 65 dBA,
  • Absolute minimum sound level at bedtime – 75 dBA,
  • Audible sound alarm above background noise (the ratio of signal to noise ratio) of 6dB to 20dB – recommended 10 dB,
  • The maximum level of 120 dBAsound the alarm.

STI (Sound Transmission Index)

  • The quality of messages
  • Speech intelligibility throughout the coverage area should be greater than or equal to 0,5 STI.

Sound Transmission Index

The quality of messages

  • The quality of messages is affected by the following factors:
  • The level of background noise
  • Signal level
  • Features of the audio source,
  • The location of the sound source,
  • Location plane overflow
  • The acoustics of the room.

Acoustic simulations

  • Project support in the selection of speaker placement in the modeled rooms,
  • Input data – very difficult to define, precise definitions are necessary finishing materials,
  • Different methods of measurement and calculation programs,
  • Experience with the use of simulators guarantee to avoid the thick mistakes
LOUDSPEAKER LINES
public address and voice_alarm_system_pava_system_in_bangladesh

Benefits of Voice Alarm System (PAVA) System

In an age where safety and communication are paramount, a Voice Alarm System (PAVA) goes beyond the ordinary by offering unique advantages that can greatly benefit various environments. Here are ten rare benefits of PAVA systems and why people should consider adopting them:

1. Seamless Multilingual Support:
PAVA systems can broadcast emergency messages in multiple languages.  This inclusivity ensures that all individuals, regardless of language proficiency, can understand critical instructions during emergencies.

2. Disaster-Specific Alerts:

PAVA systems can provide customized disaster alerts (e.g., earthquakes, floods). Tailored alerts enable precise responses and can prevent panic in crises.

3. Advanced Speech Analytics:
PAVA systems analyze speech patterns to detect distress or abnormal behavior. This proactive feature can identify emergencies even before individuals may realize it, increasing response speed.

4. Live Crowd Monitoring: PAVA systems use crowd sensors to detect and monitor crowd movement and density. Ideal for large gatherings, this feature aids in crowd management and ensures safety during events.

5. Biometric Authentication: PAVA systems can use voice recognition for authentication during emergencies. Enhances security by preventing unauthorized access to secure areas during evacuations.

6. Environmental Monitoring : PAVA systems integrate with environmental sensors to detect pollutants or hazardous substances. Protects occupants by providing early warnings about potential health hazards.

PABX System

Private Automated Branch Exchange (PABX) is a phone switching system that widely used in offices and plants, allowing a single access number to offer multiple lines to outside callers while providing a range of external lines to internal callers or staff.

Aegis provides a full range of PABX systems including analog PABX, IP PABX and Hybrid PABX. The IP PABX uses “Voice over Internet Protocol” (VoIP) technology to transform high speed internet service into a phone line to convert voice into digitized packets and then put the digitized packets onto the data network. It can easily adapt to any business, helping clients increase employees’ productivity, improve customer service and reduce cost, bring long term benefits for scalability, manageability and enhanced features.

PABX System

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