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When checking signal flow, the first thing you need to confirm is that the signal is _____. - ✔✔-being
generated by the source components
What type of connection is pictured below? (wire under screw) - ✔✔-direct connection
What type of chart is displayed below? (activity/year/budget/actual) - ✔✔-gantt chart
This type of audio system reinforces or amplifies a presenter's voice so that they'll be heard over a larger
audience. - ✔✔-Speech Reinforcement System
0 dB SPL describes: - ✔✔-the threshold of human hearing
What is a decibel? - ✔✔-a logarithmic scale used to describe ratios with a large range of values
An audio amplifier outputs 75 watts and then it is decreased to 50 watts. What is the change in
decibels? - ✔✔-Negative -1.8 dB
How loud (in decibels) does a 60 Hz sound have to be for it to be audible? - ✔✔-40 dB
According to the equal loudness curve chart below, how loud does a 20 Hz sound have to be before it is
audible? - ✔✔-70 dB
"Weighting" a sound pressure level measurement accounts for differences in the way _____. - ✔✔-
humans perceive different frequencies at a given listening level
,You measure the background noise level in a conference room at 40 dB SPL A-wtd. What is the target
sound pressure level of the audio system? - ✔✔-65
A sound wave must be transduced into _____ before it can be transmitted through the audio signal path
- ✔✔-electrical energy
Modern RF wireless microphones allow the user to _____ frequencies to avoid interference. - ✔✔-
change
The simultaneous use of multiple wireless microphone systems requires ____. - ✔✔-using lavalier
microphones
In a dynamic microphone, there is a(n) _____ attached to a diaphragm and placed in a permanent
magnetic field. - ✔✔-coil of wire
Operation of a condenser microphone requires ____ power. - ✔✔-phantom
Phantom power is the _____ required to power a condenser microphone. - ✔✔-remote power
Which of the following best describes an electret, when used in a microphone? - ✔✔-Prepolarized
material
_____ is not a necessary specification for a microphone. - ✔✔-Input impedance
A -58 dBu would be a typical signal level for a(n) _____. - ✔✔-microphone
Select all of the true statements about this image: (2kHz cardiod polar plot) - ✔✔-The above shows a
polar plot of a cardioid microphone; The response of this microphone at 2kHz is best on axis at 0
degrees.
,Direct coupled sound systems are best for program audio because of their _________. - ✔✔-Higher
fidelity
A polar plot shows a loudspeaker's ____. - ✔✔-coverage angle
Polar plot diagrams are used for which purpose? - ✔✔-Identifying a device's directionality at a given
frequency
The polar plot below shows a loudspeaker's coverage pattern at 4 kHz. What is this loudpspeaker's
coverage angle? - ✔✔-60 degrees
An increase in voltage means an increase in _____. - ✔✔-resistance, if the current remains the same
The ____ in an electrical circuit is proportional to the applied ____. - ✔✔-current; voltage
As impedance increases and current remains constant, voltage _____. - ✔✔-increases
If the measured voltage in a circuit is 40 V, and the resistance is 8 ohms, what is the current? - ✔✔-5A
The relationship between current and ____ is inversely proportional. - ✔✔-resistance
Resistance ____ the flow of current. - ✔✔-reduces
If the measured current in a circuit is 5 A and the resistance is 8 ohms, what is the voltage? - ✔✔-40
If the measured current is 10 A and the voltage is 120 V, what is the resistance in the circuit? - ✔✔-12
Ohms
The current in a circuit is 0.5 A, and the voltage is measured at 9 V. What is the power? - ✔✔-4.5 W
, The current in a circuit is measured at 1 A, and the resistance is 1 ohm. What is the voltage? - ✔✔-1 V
There are eight loudspeakers wired in parallel and each loudspeaker's impedance is 16 ohms. The
impedance of the circuit is _____ ohms. - ✔✔-2 ohms
There are four loudspeakers wired in parallel. Two of the loudspeakers each have an impedance of 8
ohms. Two of the loudspeakers each have an impedance of 16 ohms. Calculate the impedance of this
parallel circuit. - ✔✔-2.7 ohms
Which of the following is a polar plot diagram? - ✔✔-Polar plot picture
Determine the wattage in a circuit measuring 120 volts with 15 amperes of current flow. - ✔✔-1800 W
The relationship among voltage, current, and resistance is defined by the formula_____. - ✔✔-I = V/R
If the measured power in a circuit is 5W, and the current is 1.5 amps, what is the voltage? - ✔✔-3.3 V
Your room design can accommodate a screen with a width of up to 80 inches wide. The screen height is
reasonably unrestrained. Your client's video image source produces a 1920 x 1080 resolution. Which of
the following screens could be a viable option in this scenario? Choose all that apply. - ✔✔-A screen
with an image width of 80 inches and a height of 45 inches; A screen with an image width of 40 inches
and a height of 22.5 inches
What is the aspect ratio of a screen with a width of 108 inches (2743 mm) and a diagonal of 135 inches
(3429)? - ✔✔-135:101.25
You require a 16:9 screen with a height of 60 inches (1524 mm). What will the screen's diagonal be? -
✔✔-122.4
A 16:9 screen will be installed in a lecture hall. The screen's diagonal is 72 inches (1829 mm). What is its
width? - ✔✔-59.5