Certified Videoconferencing Engineer
Questions, Answers, Braindumps (1K0-001)
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What correctly describes the term "half duplex"
as it refers to audio in a videoconference?
A. Only one site of a conference is heard at any given
B. Only one person at a time is heard speaking from
any given room.
C. Only one site of a conference is allowed to speak
at any given time.
D. Only one person at a time is allowed to speak in
a given room attending a conference.
Which device connects to mic-level input?
A. an amplifier
B. a microphone
C. an audio mixer
D. a sound pressure meter
Which describes frequency response?
A. The ability to determine frequency content of a signal.
B. The ability of a device to respond to amplitude changes.
C. The ability of a circuit to define operating frequency
D. The ability of a device to operate within defined
Which describe the role room acoustics play regarding
acoustic echo cancellation? (Select 2 answers.)
A. People moving around in a room change the acoustic
paths presented to a microphone.
B. Fans, heaters, and air conditioners add background
noise to the room, changing the room acoustic paths.
C. Hard room surfaces act as reflectors for sound, causing
multiple acoustic paths from loudspeaker to microphone.
D. Heavy drapes and acoustic absorbers remove acoustic
paths and therefore cause problems for acoustic echo
Which describe training as it applies to Acoustic Echo
Cancellers (AEC)? (Select 2 answers.)
A. Training occurs regardless of the events occurring
in a given room.
B. Training is independent of room audio components
and gain settings.
C. Training is the process by which an AEC adapts to
the room acoustic system.
D. Training can be accomplished through an explicit
process such as white noise or pink noise.
Which correctly describes reverberation and echo? (Select
A. Echo is a coherent, distinct carry-on of sound.
B. Reverberation is irrelevant to conferencing audio.
C. Reverberation is long, distinct acoustic reflections.
D. Reverberation is an incoherent, diffuse carry-on
E. Echo is short, diffuse acoustic reflections that
linger after the original sound has stopped.
What does Automatic Gain Control (AGC) do? (Select 2
A. It turns up the volume to the far-end.
B. It selects among multiple microphones.
C. It turns down the volume to the far-end.
D. It builds the volume to the near-end microphone.
What correctly describes echo as it relates to acoustic
A. The sound one hears when the far-end is talking and
one tries to talk at the same time.
B. The sound of the room reverberation as picked up
by the local microphones, amplified and returned to
C. The result of sound bouncing off the walls in the
room caused by the person speaking in that room being
picked up by the microphones.
D. The sound of the far-end being returned to themselves,
caused by the room microphones picking up the audio
from the room loudspeakers.
What allows you to detect audio distortion? (Select
A. audible sound quality
B. measured audio signal level
C. measured background noise level
D. digital signal processor clock level
How is noise measured? (Select 2 answers.)
A. by volume
B. by distance
C. by amplitude
D. by impedance
Which describe sub-band and wideband Acoustic Echo Cancellers
(AECs)? (Select 3 answers.)
A. Wideband AECs treat the audio as one continuous segment.
B. Sub-band AECs treat the audio as a single 3.1 kHz
C. Wideband AECs require additional processing to reduce
D. Sub-band AECs divide the audio into small segments
and process each segment independently.
How many bits make up frames in T1 framing?