Exams: THX Home Theater Level 2 – CHINESE

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This is the Chinese version of the THX Home Theater Level 2 exam in Chinese

Welcome to the THX Home Theater Level 2 exam. This is a 30 question exam. You must receive an 80% to pass. You have three attempts to pass and it must be completed in 3 weeks.

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Congratulations! You passed the THX Home Theater Installer Level Two Chinese exam.

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You gave it a good effort, but you have to score an 85% or higher in order to pass. The good news is that you are allowed 3 attempts at this exam. So review your answers and give it another go when you’re ready.

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Exams: THX Home Theater Level 2 – CHINESE

THX Home Theater Level 2 Chinese

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Congratulations! You passed the THX Home Theater Installer Level Two Chinese exam.

1
Which is not a part of active listening?
以下哪个选项是聆听的一部分？

2
A quality home theater will have a background noise rating of _ or better.
高质量的家庭影院的背景噪音等级为_或更佳。

3
An excellent home theater will have a reflected sound decay of about _.
优秀的家庭影院的反射声衰减约为秒

4
In a high quality home theater, sound reflections are is best controlled by _____.
在高品质的家庭影院中，声音反射最好由什么控制？

5
What is the formula to calculate wavelength, where λ is wave length, c is speed of sound and f is frequency? 若λ是波长，c是声速，f是频率，计算波长的公式应为以下哪个选项？

6
What is the wavelength of a 60 Hz bass note?
60 Hz低音音符的波长是多少？

7
The resonant frequency of the first harmonic along the length axis of a 25 foot long room is ?
沿着长度为25英尺（约为7.62米）的房间的一次谐波的谐振频率是_？

8
The null of the second axial bass mode in a room will always be _.
房间内，第二次轴向低频波段的无效点始终位于_。

9
Poorly controlled bass modes are a problem because __.
控制不良的低音模式存在问题，因为

10
Slap echoes can be controlled by _________.
震颤回声可由以下哪个选项控制？

11
What absorber thickness should you use if you want to absorb down to 250 Hz?
如果要吸收250 Hz，应使用什么厚度的吸声板？

12
Acoustically transparent fabric which is hiding acoustic treatments should be acoustically transparent below at a minimum.
隐藏声学处理材料的透声织物至少应在以下透声。

13
In a high-performance home theater, what percentage (approximately) of the walls should be absorptive?
在一个高质量的家庭影院中，有多大比例（大约）的墙应该具备吸声性？

14
Speakers are easiest to aim and position when listening to ______.
扬声器在播放以下哪种内容时最容易指向和定位：

15
The center channel should be no more than degrees above/below left and right speakers.
中央声道相对左右扬声器不应超过上/下度。

16
True/False: Dipole surround speakers are not recommended in home theaters designed for immersive audio.
判断正误：在为沉浸式音频设计的家庭影院中，不建议使用偶极环绕扬声器。

17
The side surround speakers should be placed _degrees apart from the center speaker in a 7.1 configuration.
7.1配置中，侧面环绕扬声器应与中央扬声器分开_度

18
18. What is the recommended screen height a display or projector screen when using a Ultra HD/4K display?
使用UHD/ 4K显示器时，显示器或投影仪屏幕的推荐屏幕高度是多少？

19
What is the recommended number of subwoofers in a high-performance home theater?
高品质家庭影院中，低音扬声器推荐数量是多少？

20
The greatest angle a viewer should have to look up to the center of a screen is ______.
观众仰视屏幕中心的最大角度是

22
What are the benefits of using a 1.0 flat white screen (Lambertian diffuser)?
使用1.0白幕（朗伯扩散器）有什么好处？

23
The finish of the walls and ceiling around a projection screen _________.
投影屏幕周围的墙壁和天花板的处理：

24
Why are programmable controls desirable in a home theater?
为什么家庭影院需要可编程控件？

25
Sound isolation is best achieved by .
隔声最好通过实现

26
What is the latest version of HDCP copyright protection
以下哪个是HDCP版权保护的最新版本

28
Calculate the image brightness for a 16:9 screen with is 8.74 ft. wide and 4.91 ft. tall using a 1500 ANSI Lumen Projector and a 1.0 gain screen.
使用1500 ANSI流明投影仪和1.0增益屏幕，其宽度为8.74英尺，高度为4.91英尺，屏幕比例为16：9，请计算图像的亮度:

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Exams: THX Home Theater Level 2 – CHINESE

THX Home Theater Level 2 Chinese

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Congratulations! You passed the THX Home Theater Installer Level Two Chinese exam.

1 Which is not a part of active listening? 以下哪个选项是聆听的一部分？

2 A quality home theater will have a background noise rating of _____ or better. 高质量的家庭影院的背景噪音等级为_____或更佳。

3 An excellent home theater will have a reflected sound decay of about _____. 优秀的家庭影院的反射声衰减约为____秒

4 In a high quality home theater, sound reflections are is best controlled by _____. 在高品质的家庭影院中，声音反射最好由什么控制？

5 What is the formula to calculate wavelength, where λ is wave length, c is speed of sound and f is frequency? 若λ是波长，c是声速，f是频率，计算波长的公式应为以下哪个选项？

6 What is the wavelength of a 60 Hz bass note? 60 Hz低音音符的波长是多少？

7 The resonant frequency of the first harmonic along the length axis of a 25 foot long room is________ ? 沿着长度为25英尺（约为7.62米）的房间的一次谐波的谐振频率是_________？

8 The null of the second axial bass mode in a room will always be _________. 房间内，第二次轴向低频波段的无效点始终位于_________。

9 Poorly controlled bass modes are a problem because __________. 控制不良的低音模式存在问题，因为________

10 Slap echoes can be controlled by _________. 震颤回声可由以下哪个选项控制？

11 What absorber thickness should you use if you want to absorb down to 250 Hz? 如果要吸收250 Hz，应使用什么厚度的吸声板？

12 Acoustically transparent fabric which is hiding acoustic treatments should be acoustically transparent below ________ at a minimum. 隐藏声学处理材料的透声织物至少应在________以下透声。

13 In a high-performance home theater, what percentage (approximately) of the walls should be absorptive? 在一个高质量的家庭影院中，有多大比例（大约）的墙应该具备吸声性？

14 Speakers are easiest to aim and position when listening to ______. 扬声器在播放以下哪种内容时最容易指向和定位：

15 The center channel should be no more than ____ degrees above/below left and right speakers. 中央声道相对左右扬声器不应超过上/下____度。

16 True/False: Dipole surround speakers are not recommended in home theaters designed for immersive audio. 判断正误：在为沉浸式音频设计的家庭影院中，不建议使用偶极环绕扬声器。

17 The side surround speakers should be placed _____degrees apart from the center speaker in a 7.1 configuration. 7.1配置中，侧面环绕扬声器应与中央扬声器分开_____度

18 18. What is the recommended screen height a display or projector screen when using a Ultra HD/4K display? 使用UHD/ 4K显示器时，显示器或投影仪屏幕的推荐屏幕高度是多少？

19 What is the recommended number of subwoofers in a high-performance home theater? 高品质家庭影院中，低音扬声器推荐数量是多少？

20 The greatest angle a viewer should have to look up to the center of a screen is ______. 观众仰视屏幕中心的最大角度是

22 What are the benefits of using a 1.0 flat white screen (Lambertian diffuser)? 使用1.0白幕（朗伯扩散器）有什么好处？

23 The finish of the walls and ceiling around a projection screen _________. 投影屏幕周围的墙壁和天花板的处理：

24 Why are programmable controls desirable in a home theater? 为什么家庭影院需要可编程控件？

25 Sound isolation is best achieved by ________. 隔声最好通过________实现

26 What is the latest version of HDCP copyright protection 以下哪个是HDCP版权保护的最新版本

28 Calculate the image brightness for a 16:9 screen with is 8.74 ft. wide and 4.91 ft. tall using a 1500 ANSI Lumen Projector and a 1.0 gain screen. 使用1500 ANSI流明投影仪和1.0增益屏幕，其宽度为8.74英尺，高度为4.91英尺，屏幕比例为16：9，请计算图像的亮度:

1
Which is not a part of active listening?
以下哪个选项是聆听的一部分？

2
A quality home theater will have a background noise rating of _ or better.
高质量的家庭影院的背景噪音等级为_或更佳。

3
An excellent home theater will have a reflected sound decay of about _.
优秀的家庭影院的反射声衰减约为秒

4
In a high quality home theater, sound reflections are is best controlled by _____.
在高品质的家庭影院中，声音反射最好由什么控制？

5
What is the formula to calculate wavelength, where λ is wave length, c is speed of sound and f is frequency? 若λ是波长，c是声速，f是频率，计算波长的公式应为以下哪个选项？

6
What is the wavelength of a 60 Hz bass note?
60 Hz低音音符的波长是多少？

7
The resonant frequency of the first harmonic along the length axis of a 25 foot long room is ?
沿着长度为25英尺（约为7.62米）的房间的一次谐波的谐振频率是_？

8
The null of the second axial bass mode in a room will always be _.
房间内，第二次轴向低频波段的无效点始终位于_。

9
Poorly controlled bass modes are a problem because __.
控制不良的低音模式存在问题，因为

10
Slap echoes can be controlled by _________.
震颤回声可由以下哪个选项控制？

11
What absorber thickness should you use if you want to absorb down to 250 Hz?
如果要吸收250 Hz，应使用什么厚度的吸声板？

12
Acoustically transparent fabric which is hiding acoustic treatments should be acoustically transparent below at a minimum.
隐藏声学处理材料的透声织物至少应在以下透声。

13
In a high-performance home theater, what percentage (approximately) of the walls should be absorptive?
在一个高质量的家庭影院中，有多大比例（大约）的墙应该具备吸声性？

14
Speakers are easiest to aim and position when listening to ______.
扬声器在播放以下哪种内容时最容易指向和定位：

15
The center channel should be no more than degrees above/below left and right speakers.
中央声道相对左右扬声器不应超过上/下度。

16
True/False: Dipole surround speakers are not recommended in home theaters designed for immersive audio.
判断正误：在为沉浸式音频设计的家庭影院中，不建议使用偶极环绕扬声器。

17
The side surround speakers should be placed _degrees apart from the center speaker in a 7.1 configuration.
7.1配置中，侧面环绕扬声器应与中央扬声器分开_度

18
18. What is the recommended screen height a display or projector screen when using a Ultra HD/4K display?
使用UHD/ 4K显示器时，显示器或投影仪屏幕的推荐屏幕高度是多少？

19
What is the recommended number of subwoofers in a high-performance home theater?
高品质家庭影院中，低音扬声器推荐数量是多少？

20
The greatest angle a viewer should have to look up to the center of a screen is ______.
观众仰视屏幕中心的最大角度是

22
What are the benefits of using a 1.0 flat white screen (Lambertian diffuser)?
使用1.0白幕（朗伯扩散器）有什么好处？

23
The finish of the walls and ceiling around a projection screen _________.
投影屏幕周围的墙壁和天花板的处理：

24
Why are programmable controls desirable in a home theater?
为什么家庭影院需要可编程控件？

25
Sound isolation is best achieved by .
隔声最好通过实现

26
What is the latest version of HDCP copyright protection
以下哪个是HDCP版权保护的最新版本

28
Calculate the image brightness for a 16:9 screen with is 8.74 ft. wide and 4.91 ft. tall using a 1500 ANSI Lumen Projector and a 1.0 gain screen.
使用1500 ANSI流明投影仪和1.0增益屏幕，其宽度为8.74英尺，高度为4.91英尺，屏幕比例为16：9，请计算图像的亮度: