Upgrade to remove ads
Only $35.99/year

PTG AVIXA

Terms in this set (99)

To capture an analog signal accurately, the sampling rate must be at least ________ the frequency ?
Twice
What is the advantage of lossless compression ?
Files can be opened and recompressed repeatedly without data loss
What is an advantage for using IPv6 over IPv4?
more available addresses than IPv4
Type of environment most likely to produce acoustic reverberations
large rooms with many hard surfaces
The quality of digital recordings will _____ as more copies are made.
remain the same
What is throw distance?
the distance between the screen and the projector
Frequencies in the spectrum of human hearing can be divided into ten bands, each representing _____.
1 octave
What type of microphone polar pattern picks up sound primarily from the front?
cardiod
What can most affect the success of a projection system in a room?
room lighting, ambient light, projector brightness
What is a mix-minus system?
A sound reinforcement system where each listener hears a mix of the microphone signals, minus the closest microphone(s).
The _____ model is a guide that assists with conforming network communications and their processes to ISO standards.
OSI
What type of wave has the highest frequency in the range of the electromagnetic spectrum?
ultraviolet
What type of connectors are pictured below?
Euroblock connectors designed with screws to secure the conductors (also called phoenix)
Which type of loudspeaker is typically used to reproduce mid to high frequency sounds?
horn
What type of connector is pictured below?
HDMI connector, used to carry high definition video, multi-channel digital audio, and control signals
Which of these AV experiences achieves goals and meets expectations?
excellent space, content and technology
Audio signals may be purposely delayed in sound reinforcement applications to ensure that _____.
multiple sound sources will reach listeners at the same time
Lower sensitivity microphones may be used in order to _____.
capture high sound pressure level sources, such as a singer
RF wireless microphones typically allow the user to change _____ in order to avoid interference from outside sources or other wireless microphones.
frequency
What type of microphone polar pattern is pictured below?
bidirectional
Which of the following statements accurately describes unidirectional control communication?
Unidirectional communication does not verify the receipt of commands.
The second conductor of an unbalanced circuit _____.
is a shield around the wire used as the electrical circuit's return path
Which property of a wave determines the brightness of a light?
amplitude
What is the definition of "frequency?"
the number of times a complete cycle occurs per second
The DISCAS standard matters because _______.
It successfully determines the position and size of a display to support all viewers in a space.
Which of the following statements describes a DC circuit?
current in a DC circuit flows in one direction only
Which video connectors can be found on digital computer monitors?
HDMI, DisplayPort, DVI
For a video display that requires detailed viewing, the position of the farthest viewer can be calculated using.
the DISCAS formulas
The loudspeakers in a distributed system are located ____.
at regularly spaced intervals throughout the listening area
What is bit rate?
the quantity of information over time in a digital signal
A signal transmitted at the proper level will _____ over distance.
decrease in signal strength or amplitude
A signal transmitted at the proper level will _____ over distance.
decrease in signal strength or amplitude
Which of the following statements about automatic mixers in audio applications is true?
They are used for speech applications, such as meetings.
What is a mirror-like image of sound energy that reflects most energy back in a single direction?
specular reflection
What is a macro in a control system?
A group of functions activated by a single control input
What is the primary reason for electrical codes and regulations?
to safeguard persons and property
If the brightness level of a display is too high, the black areas of the image will appear _____.
gray
An audio system's power amplifier should be turned on _____.
after checking the audio signal level at every gain stage of the system
A _____ connects different types of networks
bridge
How much is sound pressure reduced every time the distance from the source is doubled?
6 dB
What color is perceived when bright red, blue, and green light are mixed together?
white
What type of circuit is illustrated in the graphic below?
series
If an electronic frequency falls outside of a circuit's bandwidth, that frequency will be ____.
lost
A ____ server keeps track of all the equipment that is on your network and assigns the equipment names so you can easily connect to them
DNS
When designers use dark materials to darken a room, they are using light's quality of _____.
Absorption
A light source's color temperature is related to the _____.
type of light source used to produce the light
Which type of microphone requires phantom power to operate?
condenser
The measurement of color temperature is expressed in _____.
Kelvin
What does a sightline study determine?
to determine the most appropriate seating layout and screen position
Resistance and impedance are quantified and expressed using what term(s)?
ohms are used for both resistance and impedance
The Inverse Square Law states that every time the distance _____ from the source of the energy, the energy spreads to cover _____ the previous area.
doubles; four times
A distribution amplifier is used to _____.
split one input into multiple isolated outputs, each with the same signal level
A light source's color temperature is related to the _____.
type of light source used to produce the light
If voltage stayed the same and current increased, resistance would have _____.
decreased
As the gain of a screen increases, the ____ decreases.
width or height of the viewing cone
Video Streaming is designed for use over what transport method?
IP Networks
Which of the following is the hardware address of a device connected to a network?
MAC
The R, G, and B video signals in an analog computer display output are typically ____.
kept separate in order to preserve the best quality
An AV system is best defined as two or more pieces of equipment that _____.
are designed to work together to meet a communications need
Which audio signal has a nominal level of 1 volt?
professional line level
Which is usually the brightest light on a subject in a three-point lighting system?
Key
Because digital video is transported as a component signal, it is ___ than composite analog video.
higher quality
What type of circuit is illustrated in the graphic below?
balanced
Which of the following display technologies are transmissive?
LCD
What negative visual effect is caused by curvature of field?
blurry edges
What is the light source of an OLED?
the OLED itself
What type of cable is pictured below?
twisted pair
The three variables that define what a color looks like are
brightness, hue and saturation
Which of these is not an end goal of an exceptional AV experience?
revenue
A diversity receiver uses a pair of antennas to _____.
select the strongest or most direct RF signal over reflections of the same signal
What is the first step in the AV system creation process?
needs analysis
Which of these are attributes of USB ports for control?
replaces serial and parallel ports
To perform _____ upon an audio signal is to reduce its amplitude, or strength
attenuation
A string's vibration or loudspeaker cone's movement pushing air molecules forward demonstrates how sound waves are _____.
generated
What is a circuit's bandwidth?
the range of frequencies a circuit can detect
A cable's bend radius is best defined as the _____.
Amount a cable can be bent before the signal is compromised or the conductor is damaged
The relationship between current and resistance is always _____.
inversely proportional
What kind of display device has pixels that are filled with a liquid crystal compound?
LCD
What acoustical property does this image represent?
transmission
When does spherical aberration occur?
When light rays pass through the edges of a lens
Light entering the eye first passes through the _____.
cornea
If the start frequency is 6 MHz, and the end frequency is 18 MHz, what is the bandwidth?
12 MHz
What does bit depth determine?
the number of states you have to define a value
Which local area network topology is represented by the image below?
Star
The area of illumination increases four times when the distance between the light source and the illuminated area is _____.
Doubled
If the color temperature is low, the light will appear to be more _____.
red
The polar plot diagram below is used to represent a loudspeaker's ____.
directivity at a specific frequency
If the resolution of an image is increased, and sampling rate remains the same, the signal bandwidth _____.
Increases
What is a factor for determining the speed of a Wi-Fi connection?
Protocol Version
A gate function automatically mutes all audio signals that _____.
fall below a set threshold
In Ohm's Law, voltage may be represented as "V" for volts. What other variable can represent voltage?
"E" for Electromotive force
It requires a _____ dB change for people to perceive a change in sound that is either twice or half as loud.
10
What type of audio processor passes very little or no additional level when the input signal level exceeds the threshold level?
limiter
Which of the following is a role of the DHCP server?
ensuring that no two devices receive the same IP address
n a series circuit, all of the current will _____.
flow through the entire circuit
What is the purpose of a wall wash in a three-point lighting system?
It lights the background and adds depth
If the display creates an image by passing light through a medium, what display technology is it using?
Transmissive
Controlling equipment through an Ethernet port
extends the control environment
The dimensions of antennas used for RF transmission are directly related to the _____.
carrier frequency
Other Quizlet sets