CAT Technical Skills 2

Question 1

What is the primary purpose of a high-pass filter (HPF) in a commercial audio system?

Accepted Answer

Remove frequencies below a set point

Answer

A high-pass filter attenuates frequencies below its cutoff point, allowing higher frequencies to pass through.

Question 2

In a balanced audio connection, which pin carries the negative (cold) signal in an XLR connector?

Accepted Answer

Pin 3

Answer

In standard XLR wiring, Pin 1 is ground, Pin 2 is positive (hot), and Pin 3 is negative (cold).

Question 3

What does 'SPL' stand for in commercial audio?

Accepted Answer

Sound Pressure Level

Answer

SPL stands for Sound Pressure Level, measured in decibels (dB), representing the intensity of sound.

Question 4

Which type of microphone uses an externally applied voltage (phantom power) to polarize its capsule?

Accepted Answer

Condenser microphone

Answer

Condenser microphones require phantom power (typically 48V) to polarize the capacitor capsule and power internal electronics.

Question 5

What is the standard impedance for professional audio line-level signals?

Accepted Answer

600 ohms

Answer

600 ohms is the traditional standard impedance for professional audio line-level signals, originating from telephone transmission systems.

(CAT) Commercial Audio Technician Practice Test