Product Details

Portable Long Range Directional Acoustic Device For Police Use

The powerful directional acoustic beam is widely used to disperse illegal crowds in the most humane way, so it is the best alternative for anti-illegal rally and invasion. In comparison with the traditional loudspeaker system, the long range directional acoustic device is a revolutionary technology of extended coverage, enabling broadcasts to be heard and understood clearly over long distances from hundreds of meters up to one kilometer, even across buildings. It has great deterrent power to force the audience to leave the forbidden area; besides, it has accurate orientation capacity, can be aimed at a certain angle to emit unbearable irritating voices, but brings no uncomfortable feelings at other angles.

Main Applications:

For anti-drug, anti-smuggling and anti-cross border at the frontiers, anti-smuggling at sea, public security and law enforcement, broadcasts and dispersion at airports and sea ports etc.

1. Issue prompt notifications and warnings to the people, vehicles in some far distance

2. Issue warnings for emergencies (illegal rallies, riots, unprovoked approach and invasion)

3. Issue unbearable noises to the illegal invasion ships at the territorial waters

4. To control the judicial detainees and prisoners, and to patrol

5. For communication and coordination at the site of severe natural disaster rescue

6. To prevent terrorists, hostages and organized terrorist activities

7. To prevent illegal entry or smuggling across borders

Key Technologies:

1. Energy transducer array: adopt the advanced technologies of finite element method, electromechanical coupling analysis, solid-fluid coupling analysis, build 2D mathematical model of coherent superposition, use nonlinear neural network compensation control, effectively forming the sound wave bunching angle, to achieve the best focus, orientation and penetration effect;

2. Energy transducer unit: use such new materials as piezoelectric elastic materials, NdFeB, and bending structure to achieve high sensitivity, good impact resistance, and vocal clarity;

3. Ultrasonic modulation: in contrast to the traditional loudspeakers using cylinder mechanism to stimulate air vibration, the directional acoustic device adopts ultrasonic sensor to produce highly oriented ultrasonic signal, which is demodulated to get high directional audible sound by the nonlinear effect of ultrasonic wave in the air.

4. Digital power amplifier: energy-efficient, compact and lightweight, reliable and durable;

5. Low power requirement

6. System integration: effective coupling between various levels of the system, effective impedance matching between the amplifier and transducer, dynamic range adjustment of digital signal processing and digital power amplifier, distortion correction etc.

Main Features:

Compact size and lightweight, portable with built-in battery and controller, all-in-one, low power requirement, simple to operate, safer alternative to non-lethal and kinetic measures

Technical Specifications:

Power consumption: 0.08KW

Max sound pressure level: 142dB @1M

Nominal beam angle: + /-15^o@2kHz

Frequency range: 500-10KHz

Work time: up to 4 hours

Input voltage: DC12-30V

Built-in battery charging time: 4 hours (fast charge), 12 hours (slow charge)

Dispelling distance: 50M

Broadcasting distance: 1000M

Hand-held microphone audio output

Recorded MP3 audio files output