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48 Cards in this Set
- Front
- Back
What are the three distinct forms of particle motion?
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-Cylindrical Wave
-Transverse Wave -Longitudinal Wave |
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How do you calculate the velocity of sound knowing the temperature?
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C=49(square root) of 459.4+ degrees farenheit
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How does temperature affect the velocity of sound?
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Temperature goes up, speed of sound goes up/ temperature goes down, speed of sound goes down
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What is wavelength?
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the distance a wave travels to complete one cycle.
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How can you reverse polarity?
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swap pins 2 and 3 on a mic cable reverse banana plug at amp
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Describe phase?
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frequency dependant time delay
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How do you calculate octave relationships?
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2:1 ratio (doubling)
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How do you calculate harmonics?
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x-multiplier of the fundamental
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How do you calculate a range of octaves?
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2n= f high/f low
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What are the main reasons for sound system measurement?
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-maintenance
-legal -artistic |
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What 5 basic test signals are used for sound system measurement?
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-white noise
-pink noise -shaped noise -broadband pulse -sinewaves |
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What is white noise?
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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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What are the 2 most common weighting curves used for SPL meters?
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-A
-C |
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What dimension is a real time analyzer missing?
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time
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What is fourier transform?
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a mathematical computation that converts amplitude vs. time into amplitude vs. frequency
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What measurement systems use FFT's?
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-SIM
-SMAART |
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What does TEF stand for?
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Time Energy Frequency
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What does MLS stand for?
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Maximum Length Sequence
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What is an electroic crossover point?
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where the low and high output of the processor crosses over
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What is an acoustic crossover point?
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when both drivers are driven at the same amplitude
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What is amplitude correction?
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a boost in certain areas of the frequency to correct for inefficiencies of a speaker cabinet.
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What is phase correction?
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delayiing certain frequencies to allow all frequencies to arrive at the same point (time alignment)
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How do amplifier spec sheets denote voltage gain?
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(input senstivity)
-dBvg -x-multiplier |
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What is power amplifier voltage gain?
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ratio of input to output voltage
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What mathematical formulas do you use to calculate amplifier voltage gain?
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dB=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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-shift crossover point
-possible phase misalignment at the crossover point |
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EASE was delevoped by?
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Dr. Wolfgang Ahnuert
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What other types of room input methods are there other than vertex by vertex?
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-create object 3D
-load prototypes |
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Name the four types of 3D shapes you can insert?
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-cuboid
-pyramid -cylinder -cone -cubola |
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Interior surfaces are what color?
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yellow
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What is the hot key used 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 way speaker are faced when inserted
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What is the command for cutting a face into two faces?
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fixed cut
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What is the hotkey to delete unattached vertices?
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Ctrl+shift+F12
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When adding floor to ceiling columns in a room you must?
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is code of
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What are some of the prototypes available?
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-church
-ampitheater -stadium |
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What applications is the SIM II V2.0 lab used for?
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standalone measurement and 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, measurement
(amplitude vs. frequency) |
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What are the 2 windows in delay finder mode?
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relative amplitude vs. time
(10x magnification) |
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What are the 3 traces in the frequency resnse screen?
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-signal to noise (coherence)
-frequency response -phase |
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What 2 choices under the setup menu reference channel are you provided with?
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generator input
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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 the generator on?
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alt G
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Which frequency is typically used for measuring harmonic distortion?
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1K
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What is the hot key for the auto delay finder mode?
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F3
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