In modern society, public safety and riot control have become indispensable links in urban management and emergency response. Traditional riot - control means such as batons, tear gas sprays, and stun guns are effective in a short time, but they have...
In large public places, ports, and industrial parks, emergencies may occur at any time. An effective early warning system can promptly remind personnel at critical moments and reduce accident risks. As an important means of information transmission, ...
In emergency communications, the clarity of information transmission directly affects rescue efficiency and safety assurance. In complex environments, factors such as noise, wind, and distance will reduce the effect of voice transmission. High-perfor...
In the fields of public safety, emergency response, and environmental protection, acoustic deterrence devices are playing an increasingly important role. Such devices use high-intensity directional or omnidirectional sound waves to achieve long-dista...
