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45 Cards in this Set
- Front
- Back
What are the 3 forms of particle motion?
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Cylindrical (360 deg.)
Transverse (90 deg) Longitudinal Waves (pushes sound in a particular direction) |
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How does temp affect the velocity of sound?
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Higher temp - Sound travels faster
Lower temp - Sound travels slower |
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What is a wavelength?
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Distance it takes for a wave to complete 1 complete cycle.
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How do you calculate wavelength?
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Lambda = 1130/Hz
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How do you reverse polarity?
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Swap pins 2 and 3.
Swap + and - at the Amp |
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What is Phase?
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Frequency Dependent Time Delay
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How do you calculate octave relationships?
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Double...a 2:1 ratio
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How do you calculate harmonics?
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Multiply by the fundamental
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What are the main reasons for a sound system measurement?
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Maintenance
Legal Artistic |
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5 basic test signals used for measurement?
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White Noise
Pink Noise Shaped Noise Broadband Pulse Sine Wave |
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White noise is...
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Equal Energy per frequency.
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What is Pink noise?
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Equal energy per octave.
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The 2 common weighting curves for an SPL are?
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A and C
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What dimension is an RTA missing?
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Time
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What is the Fourier Transform?
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Mathematical formula to convert amplitude vs. time into amplitude vs. frequency
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What measurement systems use FFT's?
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SMAART and SIM
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What does TEF stand for?
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Time
Energy Frequency TEF uses time delay spectrometry (filters out reflections) |
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What does MLS stand for?
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Maximum
Length Sequence |
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What is an electronic crossover point?
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Where the processor is crossing over.
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What is an acoustical crossover point?
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When the drivers are driven at equal amplitude.
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What is amplitude correction?
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A boost in frequencies to compliment the system.
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What is phase correction?
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Time Alignment
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How do amplifier spec sheets denote voltage gain?
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dB VG
X (Multiplier) Sensitivity |
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How do you calculate Voltage Gain?
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20 log V in
---- V out |
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How do you match amplifier voltage gains?
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Potentiometers
DIP Switches Front Panel Attenuators |
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What are some of the side effects of reducing the LF amplifier gain.
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PG 34
Shifts xover pt. down in Fq Misaligns phase relationship |
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EASE was developed by?
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Dr. Wolfgang Ahnert
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What other types of room input methods are there other than vertex by vertex?
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Extrude
Insert 3D Shape Prototypes |
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Name 5 types of 3D shapes you can insert.
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Cuboid
Cupola Cone Pyramid Cylinder |
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Interior surfaces are what color?
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Yellow
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What is the hot key to save and apply?
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F6
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Why are most rooms modeled in the negative Y axis?
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The speakers are defaulted to face that way.
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What is the command for cutting a face into 2 faces?
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Fixed Cut
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What is the hot key to delete unattached vertices's?
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CTRL-SHIFT-F12
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When adding a floor to ceiling columns in a room you must?
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Is Coat Of
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What are some of the prototypes?
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Church
Gothic Dome Shell Stadium Theatre Auditory |
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What applications is the Sim V2.0 Lab used for?
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Standard Measurement & Research
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What are the status panels?
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Information windows at the bottom of the screen.
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What are the 2 windows in Spectrum mode?
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Reference and Measurement
Amplitude vs. Frequency |
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What are the 2 windows in the Delay Finder mode?
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Delay and 10X mag of the delay
Relative Amplitude vs. Time |
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What are the 3 traces in the Frequency Response screen?
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Frequency Response
Phase S/N Ratio - Coherence |
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What 2 choices under the setup menu - Measurement Channel are you provided with?
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Output
Mic |
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What is the hot key to turn on the generator?
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ALT-G
Off is F1 |
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Which frequency do we use for THD?
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1 kHz
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What is the hot key for the Auto Set Delay in the delay finder mode?
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F3
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