PAVA System

Representing the cutting edge of audio technology, public address and 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.

In the case of fire-incident detection, automated messages regulate people’s movement in stairwells and hallways. Hence, the public address system relieves a calm and systematic evacuation. 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.

Public Address and Voice Alarm Systems (PAVA) System
PAVA System

Public address solutions – requirements


  • 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


  • 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


  • Ability to play different messages to different zones at the same time – sequences of announcements
  • 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
public address and voice_alarm_system_pava_system_in_bangladesh

Benefits of Voice Alarm System (PAVA) System

Voice Alarm Systems (PAVA) are becoming increasingly important today, where safety and communication are critical. PAVA systems offer unique benefits that can significantly improve various environments.

The public alarm system for schools, cars, churches, factories, buildings, homes, or offices is a blessing for performing urgent addresses. Here are some amazing advantages of PAVA systems and why people should consider implementing them:

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

2. Customized Disaster Alerts:
PAVA systems can provide tailored disaster alerts (e.g., earthquakes, floods). This feature helps to provide precise responses and 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 before individuals realize it, increasing response speed.

4. Live Crowd Monitoring:
PAVA systems use crowd sensors to detect and monitor crowd movement and density. This feature is ideal for large gatherings, aids crowd management, and ensures event safety.

5. Biometric Authentication:
PAVA systems can use voice recognition for authentication during emergencies. This feature 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.

Therefore, we serve the best brand’s PAVA solution in Bangladesh.

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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