Yes, subway cameras are typically live and active, allowing for real-time monitoring of the subway system. These cameras are used for security and surveillance purposes to help ensure the safety of passengers and to monitor for any potential security threats. The live feed from these cameras can be accessed by subway operators and law enforcement personnel to help them respond to any incidents or emergencies that may occur within the subway system. **

Active hearing protection refers to a type of hearing protection device that uses electronic components to actively monitor and adjust the level of noise entering the ear. These devices can detect loud noises and automatically reduce their intensity to protect the wearer's hearing. Active hearing protection also allows for normal conversation and ambient sounds to be heard, while still providing protection from harmful noise levels. **

Active capsule hearing protection is a type of hearing protection device that uses electronic technology to actively monitor and adjust the level of sound entering the ear. It is designed to provide protection from loud noises while still allowing the wearer to hear and communicate with others in their environment. Active capsule hearing protection can automatically reduce the volume of loud noises, while allowing softer sounds to be heard clearly. This type of hearing protection is often used in industrial settings, shooting ranges, and other environments where loud noises are present. **

Active sensors are devices that emit energy or radiation to scan the environment and detect objects, while passive sensors detect natural radiation emitted or reflected by objects in the environment without emitting any energy themselves. Active sensors include radar and lidar, which send out pulses of energy and measure the reflections, while passive sensors include cameras and infrared sensors, which detect light or heat emitted by objects. Both types of sensors are used in various applications such as remote sensing, surveillance, and monitoring. **

An active shooter alarm typically works by detecting gunshots or other loud noises associated with an active shooter situation. Once the alarm system detects these sounds, it triggers an alert to notify building occupants and authorities of the potential threat. This alert can include loud sirens, flashing lights, and automated messages instructing people on what actions to take, such as seeking shelter or evacuating the premises. The goal of an active shooter alarm is to quickly and effectively warn individuals of danger so they can take appropriate safety measures to protect themselves. **

The alarm on surveillance cameras should be loud in order to effectively alert individuals to potential security threats. A loud alarm can quickly grab the attention of nearby individuals and deter potential intruders or criminals. Additionally, a loud alarm can prompt a quicker response from security personnel or law enforcement, potentially preventing or minimizing the impact of a security breach. However, it is important to consider the potential impact of a loud alarm on nearby residents or businesses, and to ensure that it complies with local noise regulations. **

There are several ways to deactivate or manipulate motion sensors or surveillance cameras. One common method is to physically block the sensors or cameras with objects such as tape, paint, or clothing. Another approach is to use electronic devices like infrared LEDs to disrupt the sensors' functionality. Additionally, hacking into the camera system or cutting power to the cameras are other ways to disable surveillance equipment. However, it is important to note that tampering with surveillance equipment is illegal and can result in serious consequences. **

There are several ways to turn off or manipulate motion sensors or surveillance cameras. One common method is to physically block the camera's view or cover it with an object. Another way is to tamper with the power source or disconnect the camera from its power supply. Additionally, some advanced hackers may be able to access the camera's software or network to disable or manipulate its functionality. However, it is important to note that tampering with surveillance cameras or motion sensors is illegal and unethical. **