Q-sys Level One Training: Teleconference

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  • 1/23 Questions

    Multiple Choice: What does AEC stand for?

    • Acoustic Echo Canceler
    • Automatic Echo Cancellation
    • Automated Echo Cease
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About This Quiz

You are about to take the assessment for the Teleconferencing Training Module.
Please watch ALL videos in Teleconferencing before attempting this assessment. You must correctly answer 80% of the questions to complete this assessment.

Q-sys Level One Training: Teleconference - Quiz

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  • 2. 

    Check Boxes What are the AEC terms for the two sides of a telephone conversation? Check two.

    • Near End

    • Far End

    • Remote Caller

    • Conference Room

    Correct Answer(s)
    A. Near End
    A. Far End
    Explanation
    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 where the speaker is located, while the Far End refers to the side where the listener is located. These terms are commonly used in telecommunications to distinguish between the two ends of a conversation.

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  • 3. 

    Multiple Choice What is a common term for “acoustic reflections”?

    • Echoes

    • Speakers

    • Reverb

    Correct Answer
    A. Echoes
    Explanation
    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 hit a surface and are reflected back, they create a repetition of the original sound, which is perceived as an echo. Therefore, echoes are the correct answer for the common term used to describe acoustic reflections.

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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.

    • True

    • False

    Correct Answer
    A. False
    Explanation
    Different acoustic reflections do not take the same amount of time to travel from the near-end loudspeaker to the microphone because the speed of sound is not constant in all mediums. The speed of sound depends on factors such as temperature, humidity, and the medium through which it is traveling. Therefore, the time taken for each reflection to reach the microphone can vary depending on the distance and the medium through which it travels.

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  • 5. 

    Multiple ChoiceWhich sentence best describes what happens to acoustic reflections from the near-end loudspeaker that re-enter the microphone?

    • They are distorted and attenuated as different surfaces absorb various frequencies

    • They maintain perfect clarity along the entire path

    • 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 frequencies
    Explanation
    When acoustic reflections from the near-end loudspeaker re-enter the microphone, they are distorted and attenuated. This is because different surfaces in the environment absorb various frequencies of sound, causing the reflections to lose clarity and become weaker in intensity.

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  • 6. 

    Multiple Choice What is the average latency of telephone audio (one-way)?

    • 50 ms

    • 100 ms

    • 1 second

    Correct Answer
    A. 50 ms
    Explanation
    The average latency of telephone audio (one-way) is 50 ms. This means that there is a delay of 50 milliseconds between when the audio is transmitted from one end of the telephone call to the other end. This delay is considered to be relatively low and is generally not noticeable to the human ear.

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  • 7. 

    Multiple Choice What is the most effective way of avoiding acoustic reflections from reaching the far-end caller?

    • Use an AEC system to cancel the reflections

    • Turn off the microphone entirely while the far-end caller is speaking

    • Conduct all future business meetings via e-mail or text messaging

    Correct Answer
    A. Use an AEC system to cancel the reflections
    Explanation
    Using an AEC (Acoustic Echo Cancellation) system is the most effective way of avoiding acoustic reflections from reaching the far-end caller. Acoustic reflections can cause echo and distort the sound, making it difficult for the far-end caller to hear clearly. An AEC system cancels out these reflections by analyzing the incoming and outgoing audio signals and removing any echo or reverberation. This ensures that the far-end caller receives a clear and uninterrupted sound without any unwanted reflections. Turning off the microphone or conducting meetings via e-mail or text messaging are not effective solutions for avoiding acoustic reflections.

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  • 8. 

    Multiple Choice What is the main goal of an AEC system?

    • To eliminate any trace of the far-end caller’s voice from returning to them

    • To prevent the reflections of the far-end caller’s voice from re-entering the near-end microphone

    • 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 them
    Explanation
    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 echo or feedback caused by the far-end caller's voice being picked up by the near-end microphone and sent back to them. By doing so, the system ensures clear and uninterrupted communication by preventing the far-end caller from hearing their own voice echoed back to them.

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  • 9. 

    Check BoxesWhich of the following are processes that are a part of the AEC signal path? Check all that apply.

    • Adaptive Algorithm

    • Adaptive Filter

    • Non-Linear Processing

    Correct Answer(s)
    A. Adaptive Algorithm
    A. Adaptive Filter
    A. Non-Linear Processing
    Explanation
    The AEC signal path involves several processes to enhance the audio quality. The adaptive algorithm is used to adjust the parameters of the system based on the input signal characteristics. The adaptive filter is responsible for reducing echo and noise in the audio signal. Non-linear processing refers to techniques like compression and equalization that modify the signal in a non-linear manner. Therefore, all three options - adaptive algorithm, adaptive filter, and non-linear processing - are processes that are a part of the AEC signal path.

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  • 10. 

    Multiple Choice What is the Room Impulse Response?

    • A recording of a sharp noise broadcast from the loudspeaker to map its reflections throughout the room

    • A digital process in the AEC component that reacts to the changing environment of the near-end room

    • 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 room
    Explanation
    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, including the reflections and reverberations that occur when sound waves interact with the room's surfaces. By analyzing the Room Impulse Response, one can assess the room's acoustic characteristics and make adjustments to optimize sound quality and minimize unwanted reflections.

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  • 11. 

    Multiple ChoiceWhat are the best conditions for the Adaptive Algorithm to do its job?

    • When the far-end is speaking and the near-end is silent

    • When the far-end is silent and the near-end is speaking

    • When both the far-end and the near-end are silent

    • 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 silent
    Explanation
    In order for the Adaptive Algorithm to do its job effectively, it needs to be able to adapt to the environment and distinguish between the near-end and far-end speakers. When the far-end is speaking and the near-end is silent, it allows the algorithm to focus on and analyze the incoming speech from the far-end without interference from the near-end. This enables the algorithm to better adjust and optimize the audio quality for the listener, resulting in improved communication and understanding.

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  • 12. 

    Multiple ChoiceWhat does the Double-Talk Detector do?

    • Detects when each side is speaking and activates or deactivates the Adaptive Algorithm accordingly

    • Detects if two people in the near end are speaking at the same time and delays one after the other

    • 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 accordingly
    Explanation
    The Double-Talk Detector is a device that detects when each side is speaking and activates or deactivates the Adaptive Algorithm accordingly. This means that it can distinguish between when one side is speaking and when both sides are speaking simultaneously. When both sides are speaking, the Double-Talk Detector will deactivate the Adaptive Algorithm to prevent any interference or distortion in the audio signal. However, when only one side is speaking, it will activate the Adaptive Algorithm to enhance the audio quality.

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  • 13. 

    Multiple ChoiceWhat does the Non-Linear Processor do?

    • Analyzes the audio for any residual echoes and attenuates the appropriate sections

    • Removes random portions of the audio signal from the line entirely to conduct more time-consuming analysis

    • 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 sections
    Explanation
    The Non-Linear Processor is responsible for analyzing the audio to identify any residual echoes that may be present. Once identified, it attenuates or reduces the volume of these echoes in the appropriate sections of the audio. This helps to improve the overall audio quality by reducing any unwanted echoes that may be present.

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  • 14. 

    Multiple Choice What does Noise Reduction do?

    • Listens for steady sustained ambient noise and eliminates it

    • Attenuates all acoustic reflections and amplifies the near-end caller’s voice

    Correct Answer
    A. Listens for steady sustained ambient noise and eliminates it
    Explanation
    Noise Reduction is a feature that is designed to listen for and eliminate steady and sustained ambient noise. This means that it can identify and remove background noise such as humming, buzzing, or static, which can improve the overall sound quality and clarity of a conversation or audio recording. By eliminating this unwanted noise, Noise Reduction helps to enhance the audio experience and make it easier to hear and understand the intended sound or voice.

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  • 15. 

    Multiple Choice What does the Comfort Noise do?

    • Adds a small amount of artificial noise that helps indicate that the phone connection is still active

    • Lets the user select from a variety of relaxing soundscapes to add to the background of the audio

    • 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 active
    Explanation
    Comfort Noise is a feature in telecommunications 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 dead air or silence on the line, ensuring that the user knows the call is still connected. It is designed to provide a more natural and comfortable experience during phone conversations by simulating the background noise typically present in a conversation.

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  • 16. 

    Multiple ChoiceWhat does the Echo Return Loss Enhancement meter represent?

    • The amount, in decibels, that the far-end caller’s echoes have been successfully attenuated

    • The amount, in percentage, of far-end caller signal still present in the return signal path

    • 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 attenuated
    Explanation
    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 from the far-end caller, indicating how well the system is able to suppress these echoes.

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  • 17. 

    True or FalseThe AEC component is part of the Q-SYS Designer software for no additional cost, and does not require any additional hardware.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    The AEC component is included in the Q-SYS Designer software without any extra charges, and it does not need any additional hardware to function. This implies that users can access the AEC feature within the software without incurring any additional expenses or needing to purchase separate hardware.

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  • 18. 

    Multiple Choice What does VoIP stand for?

    • Voice over Internet Protocol

    • Virtual or Internet Phone

    • Video on Internet Paradigm

    Correct Answer
    A. Voice over Internet Protocol
    Explanation
    VoIP stands for Voice over Internet Protocol. It is a technology that allows voice communication and multimedia sessions to be transmitted over the internet rather than traditional telephone lines. This enables users to make phone calls using an internet connection, eliminating the need for a dedicated telephone line. VoIP has become increasingly popular due to its cost-effectiveness and flexibility, as it can be used on various devices such as computers, smartphones, and tablets.

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  • 19. 

    Multiple ChoiceHow do you add a Softphone to your design?

    • Click the Plus Icon in the Inventory section, and under “Streaming I/O", click the component.

    • Drag the component from Audio Component in the Right Side Pane

    • 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.

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  • 20. 

    Multiple ChoiceWhere do you select the proper network (ie. LAN A, LAN B, AUX A, AUX B) for your Softphone components?

    • In Q-SYS Administrator after loading your design to the Core (or Emulation Mode)

    • In the Properties Panel of the Softphone

    • In the Inventory Panel

    Correct Answer
    A. In Q-SYS Administrator 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. This means that the network selection for the Softphone components is done in the Q-SYS Administrator software after the design has been loaded onto the Core or in Emulation Mode.

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  • 21. 

    True or FalseYou must load your Softphone settings, such as User Name, Proxy, Authentication ID, and Password, using Q-SYS Administrator.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    In order to configure and load Softphone settings such as User Name, Proxy, Authentication ID, and Password, one must use Q-SYS Administrator. This implies that the statement "You must load your Softphone settings, such as User Name, Proxy, Authentication ID, and Password, using Q-SYS Administrator" is true.

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  • 22. 

    Multiple ChoiceOn the Softphone component, what does DND stand for?

    • Do Not Disturb

    • Dungeons 'N Dragons

    • Drop Node Distribution

    Correct Answer
    A. Do Not Disturb
    Explanation
    DND stands for "Do Not Disturb." This feature is commonly found on softphone components and allows users to indicate that they do not want to be disturbed or receive any incoming calls or notifications. It is often used when the user is busy or needs uninterrupted focus. The option "Dungeons 'N Dragons" is a common phrase associated with a popular role-playing game and is unrelated to the softphone component. "Drop Node Distribution" is not a recognized term in the context of softphones.

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  • 23. 

    True or FalseYou can have multiple Softphones in a single Q-SYS Design.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    It is possible to have multiple Softphones in a single Q-SYS Design. Softphones are software applications that allow users to make 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 calls simultaneously. This allows for flexibility and scalability in communication systems.

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Quiz Review Timeline (Updated): May 11, 2023 +

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  • Current Version
  • May 11, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Jan 20, 2013
    Quiz Created by
    Patrick Heyn

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