CST Video and Audio Surveillance Technology 1

Question 1

What is the primary advantage of IP-based surveillance systems?

Accepted Answer

Better video quality, remote access, and scalability.

Answer

IP-based surveillance systems offer significant advantages, including higher resolution video for clearer images, the ability to access footage remotely from anywhere with an internet connection, and greater scalability to easily add or upgrade cameras as needs evolve.

Question 2

Which technology allows surveillance systems to provide night vision?

Accepted Answer

Infrared (IR) technology.

Answer

Infrared (IR) technology is commonly used in surveillance cameras to provide night vision capabilities. IR illuminators emit invisible infrared light, which the camera's sensor can detect, allowing it to capture clear images even in complete darkness for continuous monitoring.

Question 3

What type of cameras are best suited for wide area surveillance?

Accepted Answer

Pan-tilt-zoom (PTZ) cameras.

Answer

Pan-tilt-zoom (PTZ) cameras are best suited for wide area surveillance because they offer dynamic control over their field of view. Their ability to pan horizontally, tilt vertically, and zoom in on specific details allows a single camera to monitor large spaces and track subjects effectively, making them highly versatile for comprehensive coverage.

Question 4

Which audio surveillance technology is used to enhance audio clarity in noisy environments?

Accepted Answer

Directional microphones and noise-canceling technology.

Answer

Directional microphones are designed to pick up sound primarily from a specific direction, reducing unwanted background noise. When combined with noise-canceling technology, which actively filters out ambient sounds, audio clarity is significantly enhanced, making conversations and specific sounds more discernible in noisy environments.

Question 5

How does motion detection in surveillance systems work?

Accepted Answer

By analyzing changes in the camera's field of view.

Answer

Motion detection in surveillance systems works by continuously analyzing the video feed for changes in pixel data within the camera's field of view. When the system detects a significant difference between consecutive frames, indicating movement, it triggers an alert or begins recording, effectively identifying activity.

(CST) Certified Surveillance Technician Practice Test

(CST) Certified Surveillance Technician Practice Test

CST Video and Audio Surveillance Technology 1