Exam: HT Adviser Certification

1
Which of these statements explains a symptom of bad sound?

The inability to understand some of the dialogue in a movie.
The system becomes harsh or unenjoyable at a less than satifying sound level.
Listeners can localize a surround speaker as a source of sound.
All statements contain symptoms of bad sound.

28 remaining

2
Which of these statements is true?

Front LCR speakers must have a clear line-of-sight from all listening locations.
Speakers can be blocked and still retain much clarity and focus.
The center channel is primarily for dialogue and little else.
All are true.

27 remaining

3
What is the correct range of angles from center for the front left and right speakers?

+/- 22 to 30 degrees.
+/- 45 to 60 degrees.
+/- 90 to 110 degrees.
The first and third are true.

26 remaining

4
Why do we correct time delay?

To correctly align the sound levels of speakers at various distances.
To correct the synchronization of video to audio; called lip-sync.
These controls have no effect and often confuse our customers.
To correct the phase alignment of the speakers caused by path differences..

25 remaining

5
Which sonic metric is considered the “prime” acoustical goal?

Clarity; because attaining it requires all metrics to be optimized.
Focus; because attaining it requires all metrics to be optimized.
Response; because attaining it requires all metrics to be optimized.
There is no "prime" acoustical goal.

24 remaining

6
Why is it incorrect to place any seats near walls or corners?

Actually, this statement is false; seats near walls and corners have the best bass.
Bass levels are unnaturally heavy close to walls and especially near corners.
Positions near walls are usually very close to side and rear speakers.
Answers 2 and 3 are both true.

23 remaining

7
What is the maximum viewing angle suggested for a video display from any seat?

Equal to or less than 10 degrees.
Equal to or less than 30 degress.
The viewer should always be looking straight ahead at 0 degrees.
Equal to or less than 15 degrees.

22 remaining

8
What is a “moderate zone”?

The space in the room farthest from the LCRs where the sound is quieter.
An area in the room where the temperature is perfect.
The areas in the room where modes are quietest (nulls).
The areas in the room where primary modal resonances are not peaking or nulling.

21 remaining

9
What phase during the overall calibration process do we check equipment for proper operation and connection?

Verification phase.
This is not part of the calibration process and is a waste of time.
Evaluation phase.
Calibration phase.
All of the above except 1.

20 remaining

10
The postion of the “sweet triangle” where best imaging is heard, depends on the separation of the front left and right speakers.

True
False

19 remaining

11
In a theater with two rows of seating, when is equi-distant placement of the side surrounds the best approach?

When there is just one row or one "money seat" in the theater.
If listeners are within 8 to 12 ft. (2.5 to 3.5 m) .
When the listeners are farther than 12 ft (3.5 m) from the side speaker.
All of the above.

18 remaining

12
Why is the center channel the most critical speaker in a home theater system?

Because it creates a wide "sweet triangle" of good focus to allow more good seats.
Because its proper placement exactly between and at the same hieght as the front left and right speakers preserves good stereo imaging for movies and music off axis.
Because it handles the most signal/power of any of the main speakers besides the subs.
Because it handles 99% of the dialogue; but thats not its main job.
All of the above.

17 remaining

13
What is the lowest height recommended for the front LCRs?.

There is no minimum height.
The ceiling is the best location so all listeners have a clear line-of-site to the speakers.
Placement at ear height or slightly higher is best.
No less than 3 ft. (1 m) from the floor.

16 remaining

14
What is bass management and why is it recommended?

It splits the signal of each channel with the subs and it allows the use of larger speakers.
It splits the signal of each channel with the subs and it allows the use of smaller speakers.
It splits the signal of each channel with the subs and makes bass calibration easier.
It sends the LFE signal to the subs and prevent the other speakers from playing too much bass.
Answers 2 and 3 are both correct.

15 remaining

15
What is Reference Level?

The loudest sound level the system can play without distorting.
The same sound level used in the studio; the artists intent for sound level.
It sets the loudest sound level the system can play to 75 dBC at the listening area.
It is always the 12 o'clock postion on the AVR volume control.

14 remaining

16
Room modes primarily distort low frequency response smoothness; what is the most effective way to reduce their effect?

Change the room shaped to have no parallel walls.
Reduce the gain on the subwoofer and adjust phase to minimize peaks.
Thoughtful listener and subwoofer location and also electronic equalization.
Placement of the sub in the corner has been shown to reduce modal issues.

13 remaining

17
What are the best techniques to promote good seat-to-seat consistency?

Approximate the sweet triangle and make sure all listeners are inside it.
Keep listeners in moderate modal zones.
Keep listeners away from walls and speakers.
All of the above.

12 remaining

18
What are the acoustical goals or metrics?

Clarity.
Focus
Envelopment
Smooth Response
Wide Dynamic Range
Seat to seat consistency
All of above.

11 remaining

19
Reverberation is necessary to enhance envelopment.

True
False

10 remaining

20
Sub position can mitigate modal peaks and nulls.

True
False

9 remaining

21
Reverberation is reduced to enhance focus.

True
False

8 remaining

22
Which of these are NOT an advantage of resilient channel.

Cost effective way to provide isolation.
Helps reduce low frequency resonance.
Available through many outlets.
Is foolproof to install.

7 remaining

23
Select where its acceptable to align Atmos “top” speakers widthwise?

Always place them 10 ft ( 3 m) apart.
Aligned widthwise in line with the front left and right speakers.
If the side/rear surrounds are too high, it might be good to narrow the width slightly inside the left and right speaker alignment.
Directly over the heads of the listeners.

6 remaining

24
What effect does adding treatment have on Focus?

Improves focus by absorbing the early reflections on the side walls.
It has no effect; adding treatment enhances envelopment.
It improves focus only if the entire side walls are treated.
It improves seat to seat consistency.

5 remaining

25
Why is it important not to overtreat the walls with absorption beyond 25% of the surface area?

This is false, its important to treat at least 50% of the room with absorption.
Because over-treating the room reduces focus.
Because we need good reflections to enhance envelopment.
Because our clients will be angry about the extra cost of more treatment.

4 remaining

26
What is the recommended minimum thickness for acoustical absorption treatments?

1" (25mm).
2" (50 mm) or (3" to 4") if possible.
1 ft (.3 m).
Acoustical absorbers are never recommended to small rooms..

3 remaining

27
Which of these is not an acoustical difference in small rooms from large rooms?

Bass resonance (room modes) causes massive distortion and must be dealt with.
Acoustical framework does not translate well from THX Theater Standards.
Traditional calculation of Reverberation Time (RT) doesn’t work.
Listeners are closer to speakers which reduces the good listening area (sweet spot)

2 remaining

28
What are the main components of the acoustical framework?

Primary Seat Location, Subwoofer Locations, LCR Placement, Surround Placement.
Primary Seat Location, Subwoofer Locations, Center channel Placement, Surround Placement.
Primary Seat Location, Subwoofer Locations, LCR Placement.
Primary Seat Location, Secondary seat locations, LCR Placement, Surround Placement.

1 remaining

29
What is the most effective way to increase the dynamic range of a home theater system?

Sell your client huge amps and efficient speakers and convince them that loud is better.
Calibrate at a lower reference level setting.
Turn the volume up.
Make the room quieter.

0 remaining

Questions?

Quiz-summary

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Results

Categories

Congratulations! You passed the THX-HAA Home Theater Advisor exam.

Close, but not quite.

1
Which of these statements explains a symptom of bad sound?

2
Which of these statements is true?

3
What is the correct range of angles from center for the front left and right speakers?

4
Why do we correct time delay?

5
Which sonic metric is considered the “prime” acoustical goal?

6
Why is it incorrect to place any seats near walls or corners?

7
What is the maximum viewing angle suggested for a video display from any seat?

8
What is a “moderate zone”?

9
What phase during the overall calibration process do we check equipment for proper operation and connection?

10
The postion of the “sweet triangle” where best imaging is heard, depends on the separation of the front left and right speakers.

11
In a theater with two rows of seating, when is equi-distant placement of the side surrounds the best approach?

12
Why is the center channel the most critical speaker in a home theater system?

13
What is the lowest height recommended for the front LCRs?.

14
What is bass management and why is it recommended?

15
What is Reference Level?

16
Room modes primarily distort low frequency response smoothness; what is the most effective way to reduce their effect?

17
What are the best techniques to promote good seat-to-seat consistency?

18
What are the acoustical goals or metrics?

19
Reverberation is necessary to enhance envelopment.

20
Sub position can mitigate modal peaks and nulls.

21
Reverberation is reduced to enhance focus.

22
Which of these are NOT an advantage of resilient channel.

23
Select where its acceptable to align Atmos “top” speakers widthwise?

24
What effect does adding treatment have on Focus?

25
Why is it important not to overtreat the walls with absorption beyond 25% of the surface area?

26
What is the recommended minimum thickness for acoustical absorption treatments?

27
Which of these is not an acoustical difference in small rooms from large rooms?

28
What are the main components of the acoustical framework?

29
What is the most effective way to increase the dynamic range of a home theater system?

Questions?

Exam: HT Adviser Certification

Quiz-summary

Information

Results

Categories

Congratulations! You passed the THX-HAA Home Theater Advisor exam.

Close, but not quite.

1 Which of these statements explains a symptom of bad sound?

2 Which of these statements is true?

3 What is the correct range of angles from center for the front left and right speakers?

4 Why do we correct time delay?

5 Which sonic metric is considered the “prime” acoustical goal?

6 Why is it incorrect to place any seats near walls or corners?

7 What is the maximum viewing angle suggested for a video display from any seat?

8 What is a “moderate zone”?

9 What phase during the overall calibration process do we check equipment for proper operation and connection?

10 The postion of the “sweet triangle” where best imaging is heard, depends on the separation of the front left and right speakers.

11 In a theater with two rows of seating, when is equi-distant placement of the side surrounds the best approach?

12 Why is the center channel the most critical speaker in a home theater system?

13 What is the lowest height recommended for the front LCRs?.

14 What is bass management and why is it recommended?

15 What is Reference Level?

16 Room modes primarily distort low frequency response smoothness; what is the most effective way to reduce their effect?

17 What are the best techniques to promote good seat-to-seat consistency?

18 What are the acoustical goals or metrics?

19 Reverberation is necessary to enhance envelopment.

20 Sub position can mitigate modal peaks and nulls.

21 Reverberation is reduced to enhance focus.

22 Which of these are NOT an advantage of resilient channel.

23 Select where its acceptable to align Atmos “top” speakers widthwise?

24 What effect does adding treatment have on Focus?

25 Why is it important not to overtreat the walls with absorption beyond 25% of the surface area?

26 What is the recommended minimum thickness for acoustical absorption treatments?

27 Which of these is not an acoustical difference in small rooms from large rooms?

28 What are the main components of the acoustical framework?

29 What is the most effective way to increase the dynamic range of a home theater system?

1
Which of these statements explains a symptom of bad sound?

2
Which of these statements is true?

3
What is the correct range of angles from center for the front left and right speakers?

4
Why do we correct time delay?

5
Which sonic metric is considered the “prime” acoustical goal?

6
Why is it incorrect to place any seats near walls or corners?

7
What is the maximum viewing angle suggested for a video display from any seat?

8
What is a “moderate zone”?

9
What phase during the overall calibration process do we check equipment for proper operation and connection?

10
The postion of the “sweet triangle” where best imaging is heard, depends on the separation of the front left and right speakers.

11
In a theater with two rows of seating, when is equi-distant placement of the side surrounds the best approach?

12
Why is the center channel the most critical speaker in a home theater system?

13
What is the lowest height recommended for the front LCRs?.

14
What is bass management and why is it recommended?

15
What is Reference Level?

16
Room modes primarily distort low frequency response smoothness; what is the most effective way to reduce their effect?

17
What are the best techniques to promote good seat-to-seat consistency?

18
What are the acoustical goals or metrics?

19
Reverberation is necessary to enhance envelopment.

20
Sub position can mitigate modal peaks and nulls.

21
Reverberation is reduced to enhance focus.

22
Which of these are NOT an advantage of resilient channel.

23
Select where its acceptable to align Atmos “top” speakers widthwise?

24
What effect does adding treatment have on Focus?

25
Why is it important not to overtreat the walls with absorption beyond 25% of the surface area?

26
What is the recommended minimum thickness for acoustical absorption treatments?

27
Which of these is not an acoustical difference in small rooms from large rooms?

28
What are the main components of the acoustical framework?

29
What is the most effective way to increase the dynamic range of a home theater system?