CEA Audio Engineering Principles 4

Question 1

What is the standard operating level for professional audio equipment in dBu?

Accepted Answer

+4 dBu

Answer

Professional audio gear typically operates at +4 dBu nominal level, providing more headroom and better noise performance than consumer -10 dBV.

Question 2

What does 'bit depth' in digital audio primarily affect?

Accepted Answer

Dynamic range and noise floor

Answer

Each additional bit of depth adds approximately 6 dB of dynamic range, so 16-bit audio provides ~96 dB and 24-bit provides ~144 dB of theoretical dynamic range.

Question 3

Which type of equalization uses a fixed bandwidth that widens proportionally at lower frequencies?

Accepted Answer

Proportional-Q (reciprocal) EQ

Answer

Proportional-Q EQ has a Q that automatically narrows at higher boost/cut amounts and widens at lower amounts, common in many console-style EQ designs.

Question 4

When using a figure-8 microphone, what is the rejection at 90° (directly to the side)?

Accepted Answer

Complete rejection (null)

Answer

A figure-8 microphone has a complete null (theoretically infinite rejection) at 90° and 270° to the capsule axis.

Question 5

What is 'headroom' in audio engineering?

Accepted Answer

The amount of gain available above nominal operating level before clipping occurs

Answer

Headroom is the margin between a system's nominal operating level and its clipping point, allowing transients to pass without distortion.

(CEA) Certified Audio Engineer Practice Test

(CEA) Certified Audio Engineer Practice Test

CEA Audio Engineering Principles 4