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Created on 02.05

Emergency Response Plan for Weather Disasters

📢 CT/HC720II Portable Emergency Broadcasting System

Portable emergency sound system for earthquake alerts with features and application diagram.
The CT/HC720II is a portable, mobile emergency early-warning broadcast system designed specifically for campus emergency hazard avoidance and safety precautions. It is characterized by its independence and mobility, featuring a compact size with high power output.

Key Features

  • Independence: Designed as an independent system, it can operate in "triple-outage" scenarios (loss of power, transportation, and communications). It features one-touch operation to play various alert audio files for natural disasters and emergencies, enabling efficient voice guidance and command.
  • High Coverage: Utilizes proprietary high-intensity transducer technology with a maximum peak sound pressure level of 138dB. The alarm sound has strong penetration and can reach over 1 kilometer in open areas, allowing a single device to cover an entire school campus.
  • Versatility: Pre-loaded with specific emergency alert audio files (e.g., fire alarms, public security incidents, disaster warnings) that can be triggered with a single button, differentiating it from standard campus PA systems.

High-intensity acoustic device with 70W power, 1,000m coverage, and peak SPL of 138dB.

🌍 Emergency Response and Handling Procedures

The reference materials also outline standardized emergency response mechanisms used in disaster management, which provide a framework for how systems like the CT/HC720II are utilized in broader scenarios.

1. Command Structure and Coordination

  • Hierarchical Command: A unified command structure is established, typically linking provincial, municipal, county, and on-site command centers to ensure smooth coordination between upper and lower levels.
  • "Normal-to-Emergency" Transition: Regular administrative bodies (e.g., disaster prevention committees) transition into emergency command mode during crises. On-site command posts are often named systematically (e.g., using date and location) to centralize authority.

2. Response Activation and Management

  • Tiered Activation: Emergency responses are categorized into four levels (I to IV) based on the severity of the disaster (e.g., earthquake magnitude, casualties). This ensures resources are scaled appropriately.
  • Rapid Action: Protocols emphasize rapid response, often prioritizing actions based on (magnitude) for speed. The process covers activation, command, execution, adjustment, and termination, forming a closed-loop management system.

3. Communication and Logistics

  • "Four Guarantees": Special emphasis is placed on solving the "Three Outages" problem — specifically, restoring road access, network connectivity, and power supply.
  • Satellite Communication: In remote or severely affected areas where terrestrial networks fail, satellite phones and satellite portable stations are deployed to ensure uninterrupted command and information reporting.

4. Public Alerting and Reconstruction

  • Early Warning: Systems (like the one described above) are used to broadcast weather warnings, earthquake alerts, and evacuation orders quickly and widely.
  • Recovery: Post-disaster, a formal assessment is conducted before a reconstruction plan is developed and implemented in a step-by-step manner.
  • PRODUCT SPECIFICATIONS
Audio playback modes with MP3 player interface, emergency alarms, and microphone inputs.
MODEL
CT/HC720II-DZ
Rated Power
80W
Peak Sound Pressure Level (@1m)
138dB±2dB
Audio Frequency Response
400Hz-10kHz
Directivity
20° @-3dB
Approximate Sound Transmission Distance (in Open Space)
1000m
Battery Endurance
≥ 8h
Ingress Protection Grade
IP56
Dimensions (L×W×H)
283x222x278mm
Weight
6kg
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