The Unique Role of Remote Acoustic Devices as Non - Lethal Weapons in Police Equipment Compared with Other Equipment

In modern police work, non - lethal weapon equipment is a key tool to balance law enforcement efforts and humanistic care. Its core goal is to effectively control on - site order and stop illegal and criminal acts without causing fatal injuries to personnel. Although traditional police non - lethal equipment (such as tear gas, rubber bullets, and stun guns) can achieve control effects, they have shortcomings such as limited scope of action, easy secondary injuries, and weak environmental adaptability. Relying on the core advantages of directional sound transmission, non - contact deterrence, and low harmfulness, remote acoustic devices have become an important supplement to the police non - lethal equipment system and show unique value different from traditional equipment in multiple scenarios.

I. Police Scenarios Adapted to Remote Acoustic Devices

The application of remote acoustic devices in police work accurately matches the following four core scenarios to solve the operation pain points of traditional non - lethal equipment:

• Mass incident handling scenarios: When order chaos (such as pushing and shoving, rushing through the police line) occurs in activities such as assemblies and marches, remote acoustic devices can broadcast laws and regulations (such as "Please abide by public security management regulations and stop illegal acts immediately") and evacuation instructions (such as "Please evacuate to the safety passages on the east and west sides") from a long distance and in a directional manner, avoiding the impact of the diffusion of traditional tear gas on unrelated people. At the riot scene, they can form a deterrent through high - sound pressure level sound, suppress the chaotic sound on the scene, and help the police control the situation.
• Suspect control scenarios: In the process of pursuing suspects, if the suspect hides in a closed space (such as an abandoned factory building and a residential building), the remote acoustic device can play a surrender - persuasion voice in a directional manner (such as "You are surrounded, and giving up resistance is the only way out"), avoiding injuries to the police or the suspect caused by forced entry. In traffic interception scenarios, it can broadcast a stop instruction to the illegal vehicle that rushes through the checkpoint (such as "The vehicle ahead, please stop immediately for inspection, and further measures will be taken if you refuse to cooperate"), without the need for the police to intercept at a close distance, reducing the law enforcement risk.
• Key area security patrol scenarios: When patrolling in key areas such as airports, railway stations, and government agencies, remote acoustic devices can play safety tips in a loop (such as "Please do not carry prohibited items and cooperate with security checks"). At the same time, they can play warning voices in a directional manner to suspicious people (such as those who linger for a long time and try to climb over the wall). In border and port patrols, they can play warning information to illegal immigrants and smuggling vehicles to form a long - distance deterrence, which is easier to control the law enforcement scale compared with equipment such as rubber bullets.
• Emergency rescue and anti - terrorism auxiliary scenarios: At the scene of a terrorist attack (such as hostage taking), the remote acoustic device can transmit negotiation information and psychological counseling content to the hijacker, avoiding direct contact from triggering a conflict. When people are trapped due to disasters such as earthquakes and fires, it can broadcast the rescue progress and escape guidance to the trapped people and assist the police in determining the location of the trapped people, which has more rescue auxiliary value compared with equipment such as stun guns.

II. Core Customer Needs in Police Scenarios

In police application scenarios, the police's needs for remote acoustic devices revolve around "safety and controllability, high - efficiency deterrence, and low harmfulness", which are specifically manifested as follows:

• Non - contact and low - harm needs: The equipment is required to achieve long - distance deterrence through sound without the need for the police to contact the target at a close distance, reducing the law enforcement risk. At the same time, the sound intensity can be adjusted accurately (80dB - 140dB). While forming an effective deterrent, it avoids causing permanent hearing damage to the target. Compared with the irritation of tear gas and the physical damage of rubber bullets, it is more in line with the requirements of humanized law enforcement.
• Directional and precise coverage needs: Traditional non - lethal equipment (such as pepper spray) is easy to diffuse under the influence of wind direction. Therefore, the remote acoustic device is required to have the ability of narrow - angle directional sound transmission (with a sound coverage angle of 30°) to ensure that the sound only acts on the target area without interfering with the surrounding unrelated people and residents. In complex environments (such as between multiple buildings), it can accurately locate the target position to avoid sound waste.
• Long - distance and anti - interference needs: The device is required to have an effective action distance of not less than 500 meters in an unobstructed environment. Even in a noisy environment (such as traffic noise and crowd noise), the voice signal can still penetrate the interference to ensure that the target can clearly receive it. Compared with stun guns (with an effective distance of less than 10 meters) and rubber bullets (with an effective distance of less than 50 meters), the law enforcement radius is greatly increased.
• Quick response and coordination needs: It supports remote operation through the police handheld terminal and command platform, including volume adjustment, voice switching, and mode conversion. No complex settings are required to meet the quick response needs in emergency scenarios. At the same time, it can be linked with police UAVs and monitoring cameras. When the camera identifies an abnormal situation, it automatically triggers the device to work, improving the law enforcement efficiency.

III. Core Characteristics of Remote Acoustic Devices in Police Scenarios

To meet the police's needs, police remote acoustic devices need to have the following targeted characteristics to ensure that they form a differentiated advantage with traditional non - lethal equipment:

• Directional sound transmission and wide frequency band output: Equipped with a professional directional loudspeaker, it can realize 30° narrow - angle directional sound transmission to avoid sound diffusion. It covers the human ear - sensitive frequency band of 200Hz - 20000Hz to ensure that the voice is clearly distinguishable even in a noisy environment, which is more accurate than the "indiscriminate effect" of tear gas.
• Multi - gear intensity adjustment and safety protection: It supports more than 5 gears of sound intensity adjustment. 80dB - 100dB is used for voice broadcasting, 110dB - 120dB is used for general warning, and 130dB - 150dB is used for strong deterrence. Each gear intensity has passed the acoustic safety certification to ensure safe use. It has built - in overheating protection and overload protection functions to avoid the sound intensity being out of control due to equipment failure, which is safer than the "uncontrollable single trigger" of rubber bullets.
• Portable and environment - adaptive design: The equipment is divided into handheld models (with a weight of less than 5 kilograms), vehicle - mounted models (which can be installed on the roof of police cars), and fixed models (used in key areas) to meet the needs of different law enforcement scenarios. The shell meets the IP65 protection level and can resist rain and sand dust intrusion. It adapts to a temperature range of - 40°C to 60°C and can work stably in bad weather (such as heavy rain and high temperature), which has better environmental adaptability than the "fear of moisture" characteristic of pepper spray.
• Quick deployment and voice pre - setting: It supports equipment erection and startup within 3 minutes to meet the needs of emergency law enforcement. It has a built - in library of common law enforcement voices (such as laws and regulations, surrender - persuasion words, and evacuation instructions), and the police can play them with one click without on - site recording. At the same time, it supports real - time voice input to facilitate the transmission of personalized instructions (such as negotiation information), which is more flexible than the "single function" of stun guns.

IV. Integration Solutions of Remote Acoustic Devices with Other Police Equipment

In the police equipment system, remote acoustic devices need to be integrated with a variety of equipment to form a "perception - decision - execution" collaborative system. The specific integration solutions are as follows:

• Integration with perception equipment: It is linked with police cameras, UAVs, and thermal imagers. When the camera identifies a mass incident or a suspect, it automatically triggers the remote acoustic device to play the corresponding voice (such as "Do not gather, evacuate immediately"). After the UAV is equipped with the device, it can realize large - scale directional sound transmission from the air to cover areas that are difficult for ground equipment to reach (such as the top of high - rise buildings and valleys). After the thermal imager detects the suspect's position in a closed space, it assists the device in transmitting sound accurately in a directional manner.
• Integration with communication equipment: It is connected to the police walkie - talkie and the command center communication system. The police can remotely control the device (such as adjusting the volume and switching the voice) through the walkie - talkie without approaching the device for operation. The command center can send commands to the device in real - time and update the voice content (such as adjusting the negotiation words) synchronously to ensure the unity of law enforcement commands, which has better coordination than the "independent operation" of traditional non - lethal equipment.
• Integration with warning equipment: It is linked with police strobe lights and sirens to form a "sound and light coordination" effect. When the remote acoustic device starts the warning mode, the strobe light is turned on synchronously (red/blue alternating flashing) and the siren is switched to the low - frequency mode. Through the dual stimulation of vision and hearing, the deterrence effect is enhanced. In night law enforcement scenarios, "sound and light coordination" can help the police quickly lock the target position and improve the law enforcement efficiency, which has better comprehensive deterrence than the "single physical effect" of rubber bullets.
• Integration with positioning and navigation equipment: Combined with the police GPS/Beidou positioning system, when the device is deployed at the border and key areas, it can automatically match the law enforcement voice corresponding to the area (such as playing "Illegal immigration is prohibited" at the border). When the police carry the handheld device to move, the system can adjust the sound coverage angle according to the position change to avoid the sound acting on non - target areas (such as residential areas), which has better controllability than the "indiscriminate diffusion" of tear gas.

V. Advantage Comparison between Remote Acoustic Devices and Other Police Non - Lethal Equipment

Compared with traditional police non - lethal equipment, remote acoustic devices show unique advantages in many aspects. The specific comparison is as follows:

• Wider scope of action and lower law enforcement risk: The effective action distance of remote acoustic devices is more than 500 meters, which is much longer than that of stun guns (10 meters) and rubber bullets (50 meters). The police do not need to contact the target at a close distance, reducing the risk of being attacked. In mass incidents, the situation can be controlled from a long distance, avoiding the police injuries caused by the "close - range delivery" of traditional equipment.
• More accurate mode of action and less irrelevant impact: The directional sound transmission technology ensures that the sound only acts on the target area, avoiding the secondary injury to the surrounding people and the police caused by the diffusion of tear gas and pepper spray under the influence of wind direction. In law enforcement in residential areas and commercial areas, the target can be deterred accurately without interfering with normal life and commercial activities, which is more in line with the requirements of humanized law enforcement.
• Lower harmfulness and easier control of law enforcement scale: The sound intensity can be adjusted as needed. The maximum intensity (140dB) only causes temporary discomfort without permanent harm. Compared with the possible fractures and internal organ injuries caused by rubber bullets, it is easier to control the law enforcement scale. In surrender - persuasion and persuasion scenarios, information is transmitted through voice, which can avoid the escalation of confrontation caused by the "force - based control" of traditional equipment.
• More flexible functions and both deterrence and rescue: In addition to the deterrence function, it can also be used for the promotion of laws and regulations, rescue guidance, and psychological counseling. Compared with traditional equipment with a single control function (such as stun guns), it has a wider range of applicable scenarios. In emergency rescue, it can assist the police in carrying out rescue work and improve the comprehensive value of the equipment.

VI. Application Cases of Remote Acoustic Devices in Police Scenarios

Case 1: Application Case of Mass Incident Handling

During a large - scale event in a city, some people rushed through the police line and threw debris, causing chaos. The police quickly deployed 8 vehicle - mounted remote acoustic devices and set them up around the scene. The devices broadcast the relevant provisions of the Public Security Administration Punishments Law (such as "Rushing through the police line is an illegal act, and legal responsibility will be pursued according to law") and evacuation instructions (such as "Please evacuate to the safety passages 50 meters north and south. If you refuse to evacuate, mandatory measures will be taken") to the chaotic area in a directional manner. At the same time, the sound intensity was adjusted to 120dB to suppress the chaotic noise on the scene. During this period, no police approached the chaotic crowd. Compared with the traditional tear gas scheme, no unrelated people felt unwell, and the on - site order was restored to normal within 1 hour. A follow - up survey showed that 90% of the participants said "they heard the instructions clearly and were willing to cooperate with the evacuation".

Case 2: Application Case of Border Patrol

In the daily patrol of a border area, the police introduced 4 fixed remote acoustic devices and installed them in key sections of the border (such as valleys and rivers where illegal immigration is easy to occur). The devices played the border management regulations in a loop (such as "Illegal immigration will be pursued for legal responsibility according to law, please return to your country of origin immediately"). At the same time, they were linked with the border monitoring camera. When the camera identified a suspicious person approaching, the device automatically switched to the directional warning mode and increased the sound intensity to 130dB. Within half a year of implementation, the number of illegal immigration incidents in this area decreased by 65%. Compared with the traditional rubber bullet patrol scheme, no personal injury occurred, and the police patrol frequency was reduced, with the law enforcement cost reduced by 40%.