Hybrid Q-sys Training: Teleconference
You are about to take the assessment for the Q-Sys Teleconferencing Training Module. You must correctly answer 80% of the questions to successfully pass this assessment.
- 1.
Multiple Choice: What does AEC stand for?
- A.
Acoustic Echo Canceler
- B.
Automatic Echo Cancellation
- C.
Automated Echo Cease
Correct Answer
A. Acoustic Echo CancelerExplanation
The correct answer is Acoustic Echo Canceler. AEC stands for Acoustic Echo Canceler, which is a technology used to eliminate or reduce the echo effect in audio systems. It is commonly used in telecommunication devices, conference systems, and audio recording equipment to improve sound quality and prevent echo feedback. AEC works by analyzing the incoming audio signal, identifying the echo components, and subtracting them from the original signal to cancel out the echo.Rate this question:
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- 2.
Check Boxes What are the AEC terms for the two sides of a telephone conversation? Check two.
- A.
Near End
- B.
Far End
- C.
Remote Caller
- D.
Conference Room
Correct Answer(s)
A. Near End
B. Far EndExplanation
The AEC terms for the two sides of a telephone conversation are "Near End" and "Far End". The near end refers to the side of the conversation that is closer to the user or the person initiating the call, while the far end refers to the side of the conversation that is farther away from the user or the person receiving the call. These terms are commonly used in telecommunications to describe the different ends of a phone conversation.Rate this question:
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- 3.
Multiple Choice What is a common term for “acoustic reflections”?
- A.
Echoes
- B.
Speakers
- C.
Reverb
Correct Answer
A. EchoesExplanation
Acoustic reflections refer to the sound waves bouncing off surfaces and returning to the listener. This phenomenon is commonly known as "echoes." When sound waves encounter a reflective surface, such as a wall or a mountain, they bounce back and create a repetition of the original sound. This repetition is what we perceive as an echo. Therefore, "echoes" is the correct term for acoustic reflections.Rate this question:
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- 4.
True or False Because the speed of sound is constant, all different acoustic reflections take the same amount of time to travel from the near-end loudspeaker to the microphone.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The statement is false because the speed of sound is not constant in all situations. The speed of sound depends on various factors such as temperature, humidity, and the medium through which it is traveling. Therefore, different acoustic reflections can take different amounts of time to travel from the near-end loudspeaker to the microphone depending on the specific conditions in which the sound is traveling.Rate this question:
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- 5.
Multiple Choice Which sentence best describes what happens to acoustic reflections from the near-end loudspeaker that re-enter the microphone?
- A.
They are distorted and attenuated as different surfaces absorb various frequencies
- B.
They maintain perfect clarity along the entire path
- C.
They maintain perfect clarity along the entire path Only the direct path from the loudspeaker to the microphone is loud enough to be registered They maintain perfect clarity along the entire path Only the direct path from the loudspeaker to the microphone is loud enough to be registered Only the direct path from the loudspeaker to the microphone is loud enough to be registered
Correct Answer
A. They are distorted and attenuated as different surfaces absorb various frequenciesExplanation
Acoustic reflections from the near-end loudspeaker that re-enter the microphone are distorted and attenuated because different surfaces absorb various frequencies. This means that the sound waves bouncing off surfaces lose some of their energy and are altered in frequency. As a result, the reflections are not as clear or loud as the original sound.Rate this question:
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- 6.
Multiple Choice What is the average latency of telephone audio (one-way)?
- A.
50 ms
- B.
100 ms
- C.
1 second
Correct Answer
A. 50 msExplanation
The average latency of telephone audio (one-way) is 50 ms. Latency refers to the time delay between the transmission and reception of audio signals. In the case of telephone audio, a latency of 50 ms means that there is a 50 millisecond delay between when the audio is spoken into the phone and when it is heard by the recipient. This delay is generally considered to be minimal and not noticeable to the human ear, ensuring smooth and real-time communication.Rate this question:
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- 7.
Multiple Choice What is the most effective way of avoiding acoustic reflections from reaching the far-end caller?
- A.
Use an AEC system to cancel the reflections
- B.
Turn off the microphone entirely while the far-end caller is speaking
- C.
Conduct all future business meetings via e-mail or text messaging
Correct Answer
A. Use an AEC system to cancel the reflectionsExplanation
Using an AEC (Acoustic Echo Cancellation) system is the most effective way of avoiding acoustic reflections from reaching the far-end caller. This system is designed to identify and cancel out any echoes or reflections that occur during a conversation, ensuring clear and uninterrupted audio for both parties involved. By implementing an AEC system, the unwanted reflections can be minimized, resulting in improved audio quality and a better communication experience.Rate this question:
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- 8.
Multiple Choice What is the main goal of an AEC system?
- A.
To eliminate any trace of the far-end caller’s voice from returning to them
- B.
To prevent the reflections of the far-end caller’s voice from re-entering the near-end microphone
- C.
To amplify the near-end caller’s voice to drown out the sound of any far-end caller’s echoes
Correct Answer
A. To eliminate any trace of the far-end caller’s voice from returning to themExplanation
The main goal of an AEC (Acoustic Echo Cancellation) system is to eliminate any trace of the far-end caller's voice from returning to them. This means that the system aims to remove any echoes or feedback that may occur during a call, ensuring that the far-end caller does not hear their own voice coming back to them. By eliminating these echoes, the system can improve the clarity and quality of the call for both parties involved.Rate this question:
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- 9.
Check Boxes Which of the following are processes that are a part of the AEC signal path? Check all that apply.
- A.
Adaptive Algorithm
- B.
Adaptive Filter
- C.
Double-Talk Detection
- D.
Non-Linear Processing
Correct Answer(s)
A. Adaptive Algorithm
B. Adaptive Filter
C. Double-Talk Detection
D. Non-Linear ProcessingExplanation
The AEC signal path involves several processes to enhance audio quality. The adaptive algorithm is used to adjust the filter parameters based on the input signal. The adaptive filter is responsible for reducing echo and background noise. Double-talk detection helps in detecting when both the near-end and far-end speakers are talking simultaneously. Non-linear processing is used to handle non-linearities in the audio signal. Therefore, all of the given options (Adaptive Algorithm, Adaptive Filter, Double-Talk Detection, Non-Linear Processing) are processes that are a part of the AEC signal path.Rate this question:
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- 10.
Multiple Choice What is the Room Impulse Response?
- A.
A recording of a sharp noise broadcast from the loudspeaker to map its reflections throughout the room
- B.
A digital process in the AEC component that reacts to the changing environment of the near-end room
- C.
The term for the remaining audio in the AEC signal path after all echoes have been subtracted
Correct Answer
A. A recording of a sharp noise broadcast from the loudspeaker to map its reflections throughout the roomExplanation
The Room Impulse Response refers to a recording of a sharp noise broadcast from the loudspeaker to map its reflections throughout the room. This recording helps in understanding the acoustic properties of the room and is used in audio processing techniques such as room correction and acoustic simulation.Rate this question:
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- 11.
Multiple Choice What does FIR stand for?
- A.
Finite Impulse Response
- B.
Final Impulse Reduction
- C.
Filtered Impulse Reaction
Correct Answer
A. Finite Impulse ResponseExplanation
FIR stands for Finite Impulse Response. This term is commonly used in signal processing and refers to a type of filter that has a finite duration of its impulse response. In other words, the output of an FIR filter is determined only by a finite number of input samples. This is in contrast to an Infinite Impulse Response (IIR) filter, which has an impulse response that extends infinitely in time. The correct answer, "Finite Impulse Response," accurately reflects the definition and usage of FIR in signal processing.Rate this question:
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- 12.
Multiple Choice What are the best conditions for the Adaptive Algorithm to do its job?
- A.
When the far-end is speaking and the near-end is silent
- B.
When the far-end is silent and the near-end is speaking
- C.
When both the far-end and the near-end are silent
- D.
When both the far-end and the near-end are speaking
Correct Answer
A. When the far-end is speaking and the near-end is silentExplanation
The best conditions for the Adaptive Algorithm to do its job is when the far-end is speaking and the near-end is silent. This is because the algorithm is designed to adapt and adjust the audio signals based on the input it receives. When the far-end is speaking and the near-end is silent, the algorithm can focus on enhancing and optimizing the far-end audio, reducing any background noise or interference, and improving the overall clarity and quality of the audio transmission.Rate this question:
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- 13.
Multiple Choice What does the Double-Talk Detector do?
- A.
Detects when each side is speaking and activates or deactivates the Adaptive Algorithm accordingly
- B.
Detects if two people in the near end are speaking at the same time and delays one after the other
- C.
Listens for a repetition of the same noises to determine if an echo is still present in the signal
Correct Answer
A. Detects when each side is speaking and activates or deactivates the Adaptive Algorithm accordinglyExplanation
The Double-Talk Detector is designed to detect when each side is speaking and then activate or deactivate the Adaptive Algorithm accordingly. This means that it can determine when both parties are speaking simultaneously and adjust the algorithm to accommodate for this double talk. This feature helps to ensure clear and effective communication by managing and minimizing any interference caused by simultaneous speech.Rate this question:
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- 14.
Multiple Choice What does the Non-Linear Processor do?
- A.
Analyzes the audio for any residual echoes and attenuates the appropriate sections
- B.
Removes random portions of the audio signal from the line entirely to conduct more time-consuming analysis
- C.
Constantly optimizes the amount of computer processing power that must be allocated to the AEC component
Correct Answer
A. Analyzes the audio for any residual echoes and attenuates the appropriate sectionsExplanation
The Non-Linear Processor analyzes the audio for any residual echoes and attenuates the appropriate sections. This means that it identifies any lingering echoes in the audio signal and reduces their intensity or eliminates them completely. This helps to improve the overall audio quality by reducing any unwanted echoes that may be present.Rate this question:
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- 15.
Multiple Choice What does Noise Reduction do?
- A.
Listens for steady sustained ambient noise and eliminates it
- B.
Attenuates all acoustic reflections and amplifies the near-end caller’s voice
Correct Answer
A. Listens for steady sustained ambient noise and eliminates itExplanation
Noise Reduction is a feature that listens for steady sustained ambient noise and eliminates it. This means that it can identify and remove background noise that may be present during a call or recording, improving the overall sound quality. By eliminating the ambient noise, the near-end caller's voice becomes clearer and more audible to the listener.Rate this question:
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- 16.
Multiple Choice What does the Comfort Noise do?
- A.
Adds a small amount of artificial noise that helps indicate that the phone connection is still active
- B.
Lets the user select from a variety of relaxing soundscapes to add to the background of the audio
- C.
Automatically inserts a short period of silence between the far-end caller’s sentences to allow the near end time to think
Correct Answer
A. Adds a small amount of artificial noise that helps indicate that the phone connection is still activeExplanation
Comfort Noise is a feature that adds a small amount of artificial noise to indicate that the phone connection is still active. This artificial noise helps prevent the perception of complete silence, which can make users think that the call has been dropped. By adding this noise, it assures users that the call is still connected and reduces the chances of them hanging up or experiencing anxiety due to silence on the line.Rate this question:
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- 17.
Multiple Choice What does the Echo Return Loss Enhancement meter represent?
- A.
The amount, in decibels, that the far-end caller’s echoes have been successfully attenuated
- B.
The amount, in percentage, of far-end caller signal still present in the return signal path
- C.
The amount, in milliseconds, that the entire phone call has been delayed due to signal processing
Correct Answer
A. The amount, in decibels, that the far-end caller’s echoes have been successfully attenuatedExplanation
The Echo Return Loss Enhancement meter represents the amount, in decibels, that the far-end caller's echoes have been successfully attenuated. This means that it measures the reduction in the strength of the echoes that the far-end caller hears, indicating how well the system is able to suppress these echoes and provide clearer communication.Rate this question:
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- 18.
True or False The AEC component is part of the Q-Sys Designer software for no additional cost, and does not require any additional hardware.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The AEC component is included in the Q-Sys Designer software at no extra cost and does not need any additional hardware. This means that users can access the AEC feature without having to pay extra or purchase any additional equipment.Rate this question:
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- 19.
Multiple Choice What does VoIP stand for?
- A.
Voice over Internet Protocol
- B.
Virtual or Internet Phone
- C.
Video on Internet Paradigm
Correct Answer
A. Voice over Internet ProtocolExplanation
VoIP stands for Voice over Internet Protocol, which refers to the technology that allows voice communication over the internet. It enables users to make phone calls using the internet instead of traditional phone lines. This technology converts voice signals into digital packets and transmits them over an IP network, making it a cost-effective and flexible alternative to traditional phone systems. VoIP has become increasingly popular due to its convenience, scalability, and ability to integrate with other communication services.Rate this question:
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- 20.
Multiple Choice How do you add a Softphone to your design?
- A.
Click the Plus Icon in the Inventory section, and under “Streaming I/O", click the component.
- B.
Drag the component from Audio Component in the Right Side Pane
- C.
Drag the component from Control Components in the Right Side Pane
Correct Answer
A. Click the Plus Icon in the Inventory section, and under “Streaming I/O", click the component.Explanation
To add a Softphone to your design, you need to click the Plus Icon in the Inventory section and then select the component under "Streaming I/O". This action will add the Softphone component to your design.Rate this question:
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- 21.
Multiple Choice Where do you select the proper network (ie. LAN A, LAN B, AUX A, AUX B) for your Softphone components?
- A.
In Q-Sys Adminstrator after loading your design to the Core (or Emulation Mode)
- B.
In the Properties Panel of the Softphone
- C.
In the Inventory Panel
Correct Answer
A. In Q-Sys Adminstrator after loading your design to the Core (or Emulation Mode)Explanation
After loading your design to the Core (or Emulation Mode) in Q-Sys Administrator, you can select the proper network (LAN A, LAN B, AUX A, AUX B) for your Softphone components.Rate this question:
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- 22.
True or False You must load your Softphone settings, such as User Name, Proxy, Authentication ID, and Password, using Q-Sys Administrator.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
To properly configure and use a Softphone, it is necessary to load the settings such as User Name, Proxy, Authentication ID, and Password. This can be done using Q-Sys Administrator, which is a software application designed for managing and configuring Q-Sys devices and systems. By using Q-Sys Administrator, users can easily input and save the required settings for their Softphone, ensuring that it is properly set up and ready for use. Therefore, the statement "You must load your Softphone settings, such as User Name, Proxy, Authentication ID, and Password, using Q-Sys Administrator" is true.Rate this question:
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- 23.
Multiple ChoiceOn the Softphone component, what does DND stand for?
- A.
Do Not Disturb
- B.
Dungeons 'N Dragons
- C.
Drop Node Distribution
Correct Answer
A. Do Not DisturbExplanation
DND stands for "Do Not Disturb". This feature is commonly found on softphone components, allowing users to indicate that they do not want to be disturbed or receive any incoming calls. It is often used when the user is busy or needs uninterrupted focus. The other options, "Dungeons 'N Dragons" and "Drop Node Distribution", are unrelated and incorrect.Rate this question:
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- 24.
True or False You can have multiple Softphones in a single Q-Sys Design.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
It is possible to have multiple Softphones in a single Q-Sys Design. Softphones are software applications that allow users to make phone calls over the internet using a computer or mobile device. In a Q-Sys Design, which is a software-based audio, video, and control platform, multiple Softphones can be integrated to enable multiple users to make phone calls simultaneously. This allows for flexibility and scalability in communication systems.Rate this question:
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Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.
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Current Version
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Mar 21, 2023Quiz Edited by
ProProfs Editorial Team -
Feb 04, 2016Quiz Created by
Patrick Heyn
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