What are the main reasons for sound system measurement?
maintenance, legal and artistic
What are the 5 basic test signals used for sound system measurement?
white noise, pink noise, shaped noise, broadband pulse, sine wave
what is white noise?
equal energy per frequency
what is pink noise?
equal energy per octave
what are the 2 most common wieghting curves used for SPL meters?
A & C
What dimension is a real time analyzer missing?
what is the fourier transform?
an equation that takes amplitude vs. time and converts it to amplitude vs. frequency
What measurement system uses FFT’s?
What does TEF stand for?
time energy frequency
What does MLS stand for?
maximum length sequence
What does MLS stand for?
maximum length sequence
what is an electronic crossover point?
where the processor is crossing over
what is an acoustic crossover point?
when drivers are driven to equal amplitude
what is amplitude correction?
boost in frequencies to compliment system

(ex. boost in 16k to cut high end)

what is phase correction?
time allignment
how do amplifier spec sheets denote voltage gain?
dbvg, X and sensitivity
what is power amplifier voltage gain?
ratio of input to output voltage
what mathematical formulas do you use to calculate amplifier voltage gain?
dbvg = 20log Vout
what mathematical formula do you use to calculate maximum output voltage?
mov = W x 8 (squared)
how do you match amplifier voltage gains?
potentiometers, dip switches and front panel attenuators (aka volume knobs)
what are some of the side effects or reducing the LF amplifier gain?
decreases the LF buildup as desired, alters directional response at crossover, increases mid frequency distortion
what applications are the SIM II V2.0 lab used for?
stand alone measurement and research
what are the status panels?
the info windows at the bottom of the screen
what are the 2 windows in spectrum mode?
1)reference and measurement
2) amplitude and frequency
what are the 2 windows in delay finder mode?
relative amplitude versus time
what are the 3 traces in the fequency response screen?
coherance, frequency response and phase
what 2 choices under the setup menu – reference channel are you provided with?
generator and input
what 2 choices under the setup menu – measurement channel are you provided with?
mic and output
what is the hot key to turn the generator ON?
[Alt.] and [G]
Which frequency is typically used for measuring harmonic distortion?
what is the hot key for the auto set delay in the delay finder mode?
EASE was developed by?
Dr. Wolfgang Ahnert
What other types of room input methods are there other than vertex by vertex?
extrude, insert shape 3D and prototype
Name the 5 types of 3D shapes you can insert?
cubiod, pyramid, cylander, cone and cupola
Interior surfaces are what color?
what is the hot key used to save and apply?
Why are most rooms modeled in the negative Y axis?
that is the direction the speakers face
what is the command for cutting a face into two faces?
fixed cut
what is the hotkey to delete unattached vertices?
[ctrl] + [shift] + [F12]
when adding floor to ceiling columns in a room you must?
select “is coat of”
what are some of the prototypes available?
amphitheatre, church, gothic dome, stadium, station, theatre, tricube