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45 Cards in this Set

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What are the 3 forms of particle motion?
Cylindrical (360 deg.)
Transverse (90 deg)
Longitudinal Waves (pushes sound in a particular direction)
How does temp affect the velocity of sound?
Higher temp - Sound travels faster

Lower temp - Sound travels slower
What is a wavelength?
Distance it takes for a wave to complete 1 complete cycle.
How do you calculate wavelength?
Lambda = 1130/Hz
How do you reverse polarity?
Swap pins 2 and 3.
Swap + and - at the Amp
What is Phase?
Frequency Dependent Time Delay
How do you calculate octave relationships?
Double...a 2:1 ratio
How do you calculate harmonics?
Multiply by the fundamental
What are the main reasons for a sound system measurement?
Maintenance
Legal
Artistic
5 basic test signals used for measurement?
White Noise
Pink Noise
Shaped Noise
Broadband Pulse
Sine Wave
White noise is...
Equal Energy per frequency.
What is Pink noise?
Equal energy per octave.
The 2 common weighting curves for an SPL are?
A and C
What dimension is an RTA missing?
Time
What is the Fourier Transform?
Mathematical formula to convert amplitude vs. time into amplitude vs. frequency
What measurement systems use FFT's?
SMAART and SIM
What does TEF stand for?
Time
Energy
Frequency

TEF uses time delay spectrometry (filters out reflections)
What does MLS stand for?
Maximum
Length
Sequence
What is an electronic crossover point?
Where the processor is crossing over.
What is an acoustical crossover point?
When the drivers are driven at equal amplitude.
What is amplitude correction?
A boost in frequencies to compliment the system.
What is phase correction?
Time Alignment
How do amplifier spec sheets denote voltage gain?
dB VG
X (Multiplier)
Sensitivity
How do you calculate Voltage Gain?
20 log V in
----
V out
How do you match amplifier voltage gains?
Potentiometers
DIP Switches
Front Panel Attenuators
What are some of the side effects of reducing the LF amplifier gain.
PG 34

Shifts xover pt. down in Fq
Misaligns phase relationship
EASE was developed by?
Dr. Wolfgang Ahnert
What other types of room input methods are there other than vertex by vertex?
Extrude
Insert 3D Shape
Prototypes
Name 5 types of 3D shapes you can insert.
Cuboid
Cupola
Cone
Pyramid
Cylinder
Interior surfaces are what color?
Yellow
What is the hot key to save and apply?
F6
Why are most rooms modeled in the negative Y axis?
The speakers are defaulted to face that way.
What is the command for cutting a face into 2 faces?
Fixed Cut
What is the hot key to delete unattached vertices's?
CTRL-SHIFT-F12
When adding a floor to ceiling columns in a room you must?
Is Coat Of
What are some of the prototypes?
Church
Gothic Dome
Shell
Stadium
Theatre
Auditory
What applications is the Sim V2.0 Lab used for?
Standard Measurement & Research
What are the status panels?
Information windows at the bottom of the screen.
What are the 2 windows in Spectrum mode?
Reference and Measurement


Amplitude vs. Frequency
What are the 2 windows in the Delay Finder mode?
Delay and 10X mag of the delay



Relative Amplitude vs. Time
What are the 3 traces in the Frequency Response screen?
Frequency Response
Phase
S/N Ratio - Coherence
What 2 choices under the setup menu - Measurement Channel are you provided with?
Output
Mic
What is the hot key to turn on the generator?
ALT-G


Off is F1
Which frequency do we use for THD?
1 kHz
What is the hot key for the Auto Set Delay in the delay finder mode?
F3