CTS Conducting AV Site Surveys 3

Question 1

According to AVIXA standards, what is the maximum distance a viewer should sit from a display, expressed as a multiple of screen height?

Accepted Answer

6 times the screen height

Answer

AVIXA's DISCAS standard recommends a maximum viewing distance of 6 times the screen height for HD content to preserve image detail.

Question 2

What does measuring RT60 during an AV site survey tell you about a space?

Accepted Answer

How long it takes for sound to decay by 60 dB, indicating the room's reverberation characteristics

Answer

RT60 measures sound decay time, directly affecting speech intelligibility and determining whether acoustic treatment is needed.

Question 3

What is the maximum horizontal off-axis viewing angle from a display's centerline that AVIXA recommends for acceptable image quality?

Accepted Answer

45 degrees

Answer

AVIXA standards set a maximum horizontal off-axis viewing angle of 45° from the display centerline before image quality degrades unacceptably.

Question 4

When surveying a room with a coffered ceiling for speaker placement, what is the primary acoustic concern?

Accepted Answer

Uneven acoustic coverage due to recessed cavities creating dead spots and additional reflections

Answer

Coffered ceiling recesses create uneven sound distribution and additional reflections that complicate speaker coverage planning.

Question 5

What is throw ratio, and why is it measured during an AV site survey?

Accepted Answer

The ratio of projector distance to image width, used to determine projector placement

Answer

Throw ratio (distance ÷ image width) determines how far a projector must be placed from the screen to achieve the desired image size.

(CTS) Certified Technology Specialist Practice Test