Term
| 3 forms of particle motion? |
|
Definition
Cylindrical
Transverse
Longitudinal |
|
|
Term
| Formula to calculate speed of sound knowing only the temperature? |
|
Definition
| c = 49√(459.4 + degrees F) |
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|
Term
| How does temp affect speed of sound? |
|
Definition
Temp increases, so does speed of sound
Temp decreases, so does speed of sound |
|
|
Term
|
Definition
| The distance a wave travels to complete one cycle |
|
|
Term
| How do you calculate wavelength? |
|
Definition
|
|
Term
| How do you calculate octave relationships? |
|
Definition
2:1 ratio
Doubling of halving |
|
|
Term
| How do you calculate harmonics? |
|
Definition
| Multipliers of the fundamental |
|
|
Term
| Formula to calculate a range of octaves? |
|
Definition
|
|
Term
|
Definition
|
|
Term
| Types of room input methods other than vertex by vertex? |
|
Definition
Extrude
Insert 3D shape
Load a prototype |
|
|
Term
| 5 types of 3D shapes you can insert? |
|
Definition
Cylinder
Cuboid
Cupola
Cone
Pyramid |
|
|
Term
| Interior surfaces are what color? |
|
Definition
|
|
Term
|
Definition
|
|
Term
| Most rooms modeled in negative axis. Why? |
|
Definition
| That's the way speakers are facing when inserted |
|
|
Term
| Command for cutting a face into 2 faces? |
|
Definition
|
|
Term
| Delete Unattached Vertices hotkey? |
|
Definition
|
|
Term
| When adding floor to ceiling columns, you must: |
|
Definition
|
|
Term
| What are some of the prototypes available? |
|
Definition
Church
Stadium
Amphitheater
Gothic dome
Tricue
Station
Redoubt
Theater
Shell
Multipurpose
Auditory |
|
|
Term
| Advantages of parametric EQ over graphic EQ? |
|
Definition
Adjustable center frequency
Adjustable bandwidth |
|
|
Term
| What is complimentary EQ? |
|
Definition
Creating the opposite in gain
Matching the bandwidth
Matching the center frequency |
|
|
Term
| What is error in center frequency? |
|
Definition
| When the center frequency of the anomaly and the center frequency of the correction do not match |
|
|
Term
| What is error in bandwidth? |
|
Definition
| When the bandwidth of the anomaly and the bandwidth of the correction do not match |
|
|
Term
|
Definition
| Two signals arriving at different times near equal amplitude causing cancellation of linear frequencies |
|
|
Term
| Two independent factors that determine the magnitude and frequency response of comb filtering? |
|
Definition
|
|
Term
| Calculate comb filtering? |
|
Definition
f = 1/t
f - frequency spacing
t - time offset in ms
To find 1st null, divide frequency spacing by 2 |
|
|
Term
| Why is it called comb filtering? |
|
Definition
| On a linear scale, it looks like the bristles of a comb |
|
|
Term
| Actions to reduce comb filtering? |
|
Definition
Delay
Level offset
High pass filters |
|
|
Term
| Why are EQs blamed for poor results when trying to correct comb filtering? |
|
Definition
| It is a time problem, it cannot be corrected with frequency |
|
|
Term
| 3 applications can SIM 3 be used for? |
|
Definition
Device analysis
Speaker analysis
Room analysis |
|
|
Term
| 2 screens in the Freq. Response tab in the Group view? |
|
Definition
|
|
Term
| 3 windows in the Band Spectrum screen. What is their significance? |
|
Definition
Console
Processor
Microphone
Representing a single branch |
|
|
Term
| How many different modes available? |
|
Definition
Free Run
Single System
Lobe Study
Combined Systems
Show
Mic EQ
Console Check
Mic Compare |
|
|
Term
| 2 types of Spectrum Analysis views in SIM 3? |
|
Definition
Band spectrum
Line spectrum |
|
|
Term
| What are the 2 screens shown in the Delay Finder tab? |
|
Definition
Processor amplitude
Room amplitude |
|
|
Term
| Where do you toggle phantom power for SIM 3? |
|
Definition
|
|
Term
| Most significant upgrade made to SIM 3 from SIM II? |
|
Definition
Ability to do multi-channel
CD-ROM |
|
|
Term
| What role does the Galileo processor play in SIM 3 multi-channel? |
|
Definition
| It acts as the line switcher/processor in the SIM branch |
|
|
Term
| What function of the Galileo processor can be controlled from SIM 3? |
|
Definition
| Switching outputs (muting/un-muting) |
|
|
Term
| How many mics can you input to 1 mic switcher? |
|
Definition
|
|
Term
| Branch Measurement Points? |
|
Definition
|
|
Term
| 3 frequency responses in a branch? |
|
Definition
Processor
Speaker + room
Result |
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
| 2 variables for a primary mic placement? |
|
Definition
+/- 10º On axis
Center of listening area |
|
|
Term
| What is an inverted processor? |
|
Definition
An upside down EQ
A cut looks like a boost
A boost looks like a cut |
|
|
Term
|
Definition
| You are measuring one system at a time, the other systems are muted |
|
|
Term
|
Definition
| The primary system you are studying is muted and you are looking at other systems interacting |
|
|
Term
| 7 steps to analyze a stereo system? |
|
Definition
1. Preliminary preparations
2. Interfacing SIM with the sound system
3. Initial testing
4. Testing for harmonic distortion
5. Finding the delay offset
6. Initial EQ
7. Adding the systems together |
|
|
Term
| What type of mic is used for acoustic measurement? |
|
Definition
|
|
Term
| What happens when a measurement mic is angled 90º from the source? |
|
Definition
| At 5kHz and above it starts to roll off |
|
|
Term
| Where should secondary mic be placed? |
|
Definition
| Anywhere in the listening area |
|
|
Term
| Typically, where should we not place the measurement mic? |
|
Definition
Near walls or pillars
Exact center of rooms
In the aisles (except in some line array situations) |
|
|
Term
| When should we use sitting height for the measurement mic position? |
|
Definition
| In recording studios & for front fills |
|
|
Term
| Why does Auto-EQ not work? |
|
Definition
|
|
Term
| What are the initial EQ considerations in a studio? |
|
Definition
The sweet spot must be wide enough for both ears
Pay close attention to the S/N or Coh
Only EQ for Low Q problems, don't worry so much about the High Q issues |
|
|
Term
| Which company manufactures the Galileo? |
|
Definition
|
|
Term
| Name of the software used with the Galileo? |
|
Definition
|
|
Term
| What kind of cable is used to connect Galileo to the measurement system? |
|
Definition
|
|
Term
| Main reasons for sound system measurement? |
|
Definition
|
|
Term
|
Definition
White Noise
Pink Noise
Broadband Pulse
Shaped Noise
Sine Waves |
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
| 2 most common weighting curves for SPL meters? |
|
Definition
|
|
Term
| Dimension RTA is missing? |
|
Definition
|
|
Term
| What is Fourier Transform? |
|
Definition
| Mathematical calculation converts: (amplitude v. time) into (amplitude v. frequency) |
|
|
Term
| What measurement systems use FFTs? |
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
| A source or signal is either pushing positive or negative |
|
|
Term
|
Definition
| Frequency Dependent Time Delay |
|
|
Term
| 3 ways to reverse polarity? |
|
Definition
Swap pins 2 & 3 on cable
reverse speaker wiring
Polarity switch or settings (console) |
|
|
Term
| Two signals of equal amplitude at 0º offset will result in? |
|
Definition
|
|
Term
| Two signals of equal amplitude at 180º offset will result in? |
|
Definition
|
|
Term
| Two signals at equal amplitude at 120º offset will result in? |
|
Definition
| Neither cancellation or coupling. |
|
|
Term
| Trace angled to the left is: |
|
Definition
|
|
Term
| Trace is angled to the right: |
|
Definition
|
|
Term
| Trace angled straight up and down is: |
|
Definition
|
|
Term
| What applications is SIM 2.0 Lab Mode used for? |
|
Definition
| Standalone measurement and research |
|
|
Term
| How do you properly patch for SIM II 2.0 Lab Mode? |
|
Definition
| Drawing is still on the board |
|
|
Term
| What are the status panels? |
|
Definition
| Information Windows at the Bottom of the Screen |
|
|
Term
|
Definition
| One of the Ports has reached OVERLOAD |
|
|
Term
| 2 windows in spectrum mode? |
|
Definition
|
|
Term
| Dimensions in the Delay Finder screen? |
|
Definition
Relative Amplitude vs. Time
Bottom window 10x magnification of the top window |
|
|
Term
|
Definition
|
|
Term
| Hotkeys for trace offset? |
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
| Who owns & markets SMAART now? |
|
Definition
|
|
Term
| External hardware needed for SMAART? |
|
Definition
Mic
Sound card (recommended)
Cabling/Adapters |
|
|
Term
| Info that must be entered in Spectrum Measurement Config Window? |
|
Definition
|
|
Term
| Info to be entered in Transfer Measurement Window? |
|
Definition
| The pair of inputs you wish to compare |
|
|
Term
| 2 operational modes for SMAART? |
|
Definition
Real time
Impulse response |
|
|
Term
| 2 measurement plot types that can be viewed within SMAART's spectrum mode? |
|
Definition
|
|
Term
| 2 measurement plot types that can be viewed in SMAART's transfer mode? |
|
Definition
|
|
Term
| Hotkey to save trace information? |
|
Definition
|
|
Term
| Hotkey to turn generator on/off? |
|
Definition
|
|
Term
| What point does SMAART use accumulators rather than FIFO? |
|
Definition
| Above 16 averages (1 sec, 2 sec, etc) |
|
|
Term
|
Definition
| Sound that lingers in a room after signal is turned off |
|
|
Term
|
Definition
|
|
Term
| Who was Wallace C. Sabine? |
|
Definition
| Founded field of architectural acoustics |
|
|
Term
|
Definition
| The time it take a sound to decay 6 dB |
|
|
Term
| Sabine's classic equation for RT60? |
|
Definition
|
|
Term
|
Definition
|
|
Term
| How do you caculate for S? |
|
Definition
| Multiply each surface by its two dimensions, then sum the all together |
|
|
Term
| What changes are made to Sabine's equation when calculating for absorption of air? |
|
Definition
| Add +4mV to the denominator of the Sabine equation |
|
|
Term
|
Definition
| Heating Ventilation Air Conditioning |
|
|
Term
| Male carrier wave is between? |
|
Definition
|
|
Term
| What is normal in presence of noise? |
|
Definition
| We involuntarily raise our voices due to the noise level |
|
|
Term
|
Definition
|
|
Term
| Who developed NCB charts? |
|
Definition
|
|
Term
| Recommended NCB for classroom? |
|
Definition
|
|
Term
| What is transmission loss? |
|
Definition
| The loss of sound pressure through various materials |
|
|
Term
| Residential constructon: Interior walls made of? |
|
Definition
2 x 4's
16" on center
1/2" drywall both sides |
|
|
Term
| How many layers of drywall will provide the greatest value for transmission loss? |
|
Definition
|
|
Term
| Which module shows 3D mapping? |
|
Definition
|
|
Term
| What symbol used for Acoustic Probe? |
|
Definition
|
|
Term
| Frequencies used for calculating RASTI? |
|
Definition
|
|
Term
|
Definition
| Rapid Articulation Speech Transmission Index |
|
|
Term
|
Definition
| Percentage of Articulation Loss of Consonants |
|
|
Term
| In EASE, what does C stand for? |
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
| Module that demonstrates sound transmission and reflections beings scattered in a room showing SPL loss, orders of reflections and propagation time of signals? |
|
Definition
|
|
Term
| Who developed Theory of Time Delay Spectrometry? |
|
Definition
|
|
Term
| Dimensions in an ETC curve? |
|
Definition
|
|
Term
| TEF gathers data in which domain? |
|
Definition
|
|
Term
| It takes _________ to measure time? |
|
Definition
|
|
Term
| It takes ____________ to measure frequency? |
|
Definition
|
|
Term
| Formula to calculate time window? |
|
Definition
|
|
Term
| It may be more convenient to set ________ and __________ and let the computer set sweep rate and bandwidth. |
|
Definition
|
|
Term
| How to calculate reflection from speaker to floor to microphone? |
|
Definition
|
|
Term
| Why does TEF use 20microPascals for calibration? |
|
Definition
|
|
Term
| How does Schroeder Reverse Integration Curve calculate it's data? |
|
Definition
| From the right side of the screen back to the direct signal |
|
|
Term
| Which two harmonics seem to do the most damage to the THD? |
|
Definition
|
|
Term
| How can floating a panel help instead of mounting it? |
|
Definition
| Absorbs more low frequencies |
|
|
Term
| Most home theaters should have an RT60 of ________ sec from 200Hz to 2kHz. |
|
Definition
|
|
Term
| Center speaker should not be more than ______ feet from height of L/R speakers? |
|
Definition
|
|
Term
| Two types of rear surround speakers? |
|
Definition
|
|
Term
| Rear surround speakers should be at height of: |
|
Definition
|
|
Term
| Good way to determine subwoofer placement to reduce room modes? |
|
Definition
|
|
Term
| Range for loudest sounds of a soundtrack? |
|
Definition
|
|
Term
| Range for quietest background effects on a soundtrack? |
|
Definition
|
|
Term
| 3 companies that made 5.1 Audio Toolkit DVD? |
|
Definition
|
|
Term
| What help is a multiplexer when doing 5.1 systems? |
|
Definition
| It allows multiple microphones to achieve "spatial-averaging" |
|
|
