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Created on 02.09

DY123 /130 Unmanned Aerial Vehicle Intense Sound Hailer

DY123 /130 Unmanned Aerial Vehicle Intense Sound Hailer
DY123 speaker: audio playback, TTS. DY130 horn: built-in audio, TTS, voice hailing, pan-tilt.
Technical Analysis and Integration Recommendations for Drone-Based Public Address (PA) Systems
Based on the technical specifications of two public address units — DY123 and DY130 — this document outlines a comprehensive solution tailored to drone operational requirements in scenarios such as routine patrol, emergency response, and crowd guidance. The proposal is structured across three key dimensions: device selection, integration design, and scenario-specific adaptation, aiming to ensure efficient, reliable, and mission-ready deployment of drone-mounted PA capabilities.

I. Comparative Technical Parameters and Scenario-Based Selection Logic

The two models exhibit significant differences in core specifications. Optimal selection must align with the drone’s payload capacity and mission-specific environmental demands.
Parameter
DY123
DY130
Scenario Adaptation Logic
Rated Power
15 W
25 W
Higher power delivers greater acoustic energy — ideal for noisy environments or long-range broadcasting. Lower power reduces weight and mechanical load on drones, supporting longer endurance.
Peak Sound Pressure Level (at 1 m)
123 dB ± 2 dB
132 dB ± 2 dB
A 9 dB increase corresponds to ~2× perceived loudness. DY130 offers superior noise-penetration capability — critical for urgent/emergency announcements.
Effective Broadcast Range (open field)
200 m
400 m
Doubling the radius quadruples coverage area (πr²). DY130 enables wide-area surveillance, inter-zonal communication, and large-scale event management.
Pitch Angle Adjustment
Not supported
0°–90° (motorized)
Enables directional sound projection: downward tilt during high-altitude flight minimizes upward sound dispersion and maximizes ground-level intelligibility and focus.
Dimensions & Weight
138 × 90 × 60 mm / 200 g
207 × 137 × 181 mm / 500 g
DY123 suits consumer-grade or compact drones; DY130 requires industrial-class platforms with ample payload margin and structural rigidity.
Ingress Protection (IP) Rating
IP55 (dust-resistant, splash-proof)
IP55
IP55 ensures basic outdoor resilience — suitable for light rain/snow. Heavy rain or strong winds necessitate flight suspension to prevent water ingress.
Power Input Requirement
DC 18 V – 26.4 V
DC 18 V – 26.4 V
Drone batteries must be compatible with this voltage range; dedicated DC-DC converters are required to regulate output and ensure stable supply.

Scenario-Based Device Selection Guidance:

  • Large-Scale Events, Emergency Rescue, Cross-Zone Communication DY130
  • Community Patrol, Agricultural Broadcasting, Small/Medium Area Crowd Guidance DY123

II. Drone Integration Design Considerations

Successful integration requires deep coupling between the PA unit and the drone’s power system, flight controller (FC), and video transmission (VTX) subsystems — enabling real-time voice broadcasting, precise acoustic targeting, and robust operational stability.

1. Power System Integration

Drone battery power is converted via a DC-DC regulator to meet the 18-26.4 V input requirement. Critical implementation points include:
  • Voltage Stability Assurance voltage monitoring module
  • Redundancy & Interfacing

2. Mechanical Mounting & Vibration Damping

The PA unit is mounted beneath the drone using a shock-absorbing gimbal — particularly essential for DY130 due to its motorized pitch mechanism:
  • Vibration Isolation Logic
  • Pitch Control Integration

3. Audio Signal & Control Coordination

The PA audio input is connected either to the drone’s video transmission system or an external audio processing module — enabling synchronized “video + voice” operations:
  • Real-Time Broadcasting Workflow
  • Intelligent Expansion Capability “Danger ahead — evacuate immediately.”

III. Key Operational Considerations

1. Payload–Endurance Trade-off

  • Example: DJI Matrice 300 RTK (baseline endurance ≈ 40 min) experiences 25% reduced flight time (
  • Lightweight platforms (e.g., DJI Mavic series) should exclusively use DY123 (200 g) to avoid overloading risks — including potential loss of control or crash.

2. Acoustic Safety & Environmental Adaptation

  • Hearing Safety Compliance
  • Extreme Environment Resilience
    • Low Temperature (< –10°C)
    • High Wind (> Beaufort Scale 3)

Summary & Strategic Recommendation

A robust drone-based PA solution must strike an optimal balance among device performance, mission context, and system integration reliability:
✅ For emergency response and wide-area operations, select DY130, leveraging its high power, extended range, and precise acoustic directionality.
✅ For routine patrol, lightweight platforms, and endurance-critical missions, prefer DY123, prioritizing efficiency and compatibility.
✅ During integration, prioritize three pillars:
 🔹 Power system stability (voltage regulation + fault protection),
 🔹 Acoustic precision (gimbal-controlled pitch + real-time targeting),
 🔹 Intelligent interoperability (AI-triggered alerts, video–audio synchronization).
✅ Proactively manage cross-cutting constraints: payload–endurance trade-offs, environmental resilience (cold/wind), and regulatory-compliant acoustic safety.
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