What type of security system sensing device detects sound frequencies?

What type of security system sensing device detects sound frequencies?

• A. Acoustic glass break detector
• B. Stress sensor
• C. Interface device
• D. Voice verification

Answer: (A)

The question is about how security systems detect environmental sounds by analyzing frequencies. An acoustic glass break detector uses a microphone to pick up the sound and then analyzes the frequency content and temporal pattern to identify the distinctive signature of glass breaking. This often involves spectrum analysis and pattern recognition to distinguish breaking glass from normal ambient noise, then triggering an alarm when the signature is detected. Other sensing options don’t fit this purpose: a stress sensor measures physical pressure or strain, not sound; an interface device is a connection or control unit rather than a sensing element; and voice verification checks a person’s spoken voice for authentication, not the environment’s sounds.

The question is about how security systems detect environmental sounds by analyzing frequencies. An acoustic glass break detector uses a microphone to pick up the sound and then analyzes the frequency content and temporal pattern to identify the distinctive signature of glass breaking. This often involves spectrum analysis and pattern recognition to distinguish breaking glass from normal ambient noise, then triggering an alarm when the signature is detected.

Other sensing options don’t fit this purpose: a stress sensor measures physical pressure or strain, not sound; an interface device is a connection or control unit rather than a sensing element; and voice verification checks a person’s spoken voice for authentication, not the environment’s sounds.