AMS Fullsail

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AMS Fullsail
2013-05-24 15:50:24
AMS Fullsail

AMS Fullsail
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  1. Acoustical Studies I
    3 forms of particle motion?
    • Cylindrical
    • Transverse
    • Longitudinal
  2. Acoustical Studies I
    Formula to calculate speed of sound knowing only the temperature?
    c = 49√(459.4 + degrees F)
  3. Acoustical Studies I
    How does temp affect speed of sound?
    • Temp increases, so does speed of sound
    • Temp decreases, so does speed of sound
  4. What is wavelength?
    The distance a wave travels to complete one cycle
  5. Acoustical Studies I
    How do you calculate wavelength?
    λ = 1130/Hz
  6. Acoustical Studies I
    How do you calculate octave relationships?
    • 2:1 ratio
    • Doubling of halving
  7. Acoustical Studies I
    How do you calculate harmonics?
    Multipliers of the fundamental
  8. Acoustical Studies I
    Formula to calculate a range of octaves?
    2^n = ƒH/ƒL
  9. EASE 1
    EASE was developed by?
    Wolfgang Anhert
  10. EASE 1
    Types of room input methods other than vertex by vertex?
    • Extrude
    • Insert 3D shape
    • Load a prototype
  11. EASE 1
    5 types of 3D shapes you can insert?
    • Cylinder
    • Cuboid
    • Cupola
    • Cone
    • Pyramid
  12. EASE 1
    Interior surfaces are what color?
  13. EASE 1
    Save & Apply hotkey?
  14. EASE 1
    Most rooms modeled in negative axis. Why?
    That's the way speakers are facing when inserted
  15. EASE 1
    Command for cutting a face into 2 faces?
    Fixed cut
  16. EASE 1
    Delete Unattached Vertices hotkey?
  17. EASE 1
    When adding floor to ceiling columns, you must:
    Is coat of?
  18. EASE 1
    What are some of the prototypes available?
    • Church
    • Stadium
    • Amphitheater
    • Gothic dome
    • Tricue
    • Station
    • Redoubt
    • Theater
    • Shell
    • Multipurpose
    • Auditory
  19. Intro to Measurement Systems
    Main reasons for sound system measurement?
    • Maintenance
    • Legal
    • Artistic
  20. Intro to Measurement Systems
    5 basic test signals
    • White Noise
    • Pink Noise
    • Broadband Pulse
    • Shaped Noise
    • Sine Waves
  21. Intro to Measurement Systems
    What is white noise?
    Equal energy / frequency
  22. Intro to Measurement Systems
    What is pink noise?
    Equal energy / octave
  23. Intro to Measurement Systems
    2 most common weighting curves for SPL meters?
    A & C
  24. Intro to Measurement Systems
    Dimension RTA is missing?
  25. Intro to Measurement Systems
    What is Fourier Transform?
    Mathematical calculation converts: (amplitude vs time) into (amplitude vs frequency)
  26. Intro to Measurement Systems
    What measurement systems use FFTs?
    • SIM
    • SMAART
  27. Intro to Measurement Systems
    What does TEF stand for?
    Time Energy Frequency
  28. Intro to Measurement Systems
    What does MLS stand for?
    Maximum Length Sequence
  29. Polarity-Phase
    Define polarity.
    A source or signal is either pushing positive or negative
  30. Polarity-Phase
    Phase in 4 words?
    Frequency Dependent Time Delay
  31. Polarity-Phase
    3 ways to reverse polarity?
    • Swap pins 2 & 3 on cable
    • reverse speaker wiring
    • Polarity switch or settings (console)
  32. Polarity-Phase
    Two signals of equal amplitude at 0º offset will result in?
    6 dB of coupling
  33. Polarity-Phase
    Two signals of equal amplitude at 180º offset will result in?
    Full cancellation
  34. Polarity-Phase
    Two signals at equal amplitude at 120º offset will result in?
    Neither cancellation or coupling.
  35. Polarity-Phase
    Trace angled to the left is:
  36. Polarity-Phase
    Trace is angled to the right:
  37. Polarity-Phase
    Trace angled straight up and down is:
  38. Polarity-Phase
    How many milliseconds of delay would each of these speaker drivers require to be in time
    • high = 4.5ms
    • mids = 3ms
  39. Acoustical Studies II
    Advantages of parametric EQ over graphic EQ?
    • Adjustable center frequency
    • Adjustable bandwidth
  40. Acoustical Studies II
    What is complimentary EQ?
    • Creating the opposite in gain
    • Matching the bandwidth
    • Matching the center frequency
  41. Acoustical Studies II
    What is error in center frequency?
    When the center frequency of the anomaly and the center frequency of the correction do not match
  42. Acoustical Studies II
    What is error in bandwidth?
    When the bandwidth of the anomaly and the bandwidth of the correction do not match
  43. Acoustical Studies II
    What is comb filtering?
    Two signals arriving at different times near equal amplitude causing cancellation of linear frequencies
  44. Acoustical Studies II
    Two independent factors that determine the magnitude and frequency response of comb filtering?
    • Time offset
    • Level offset
  45. Acoustical Studies II
    Calculate comb filtering?
    • f = 1/t
    • f - frequency spacing
    • t - time offset in ms
    • To find 1st null, divide frequency spacing by 2
  46. Acoustical Studies II
    Why is it called comb filtering?
    On a linear scale, it looks like the bristles of a comb
  47. Acoustical Studies II
    Actions to reduce comb filtering?
    • Gate
    • Delay
    • Level offset
    • High pass filters
  48. Acoustical Studies II
    Why are EQs blamed for poor results when trying to correct comb filtering?
    It is a time problem, it cannot be corrected with frequency
  49. SIM Multi
    How many mics can you input to 1 mic switcher?
  50. SIM Multi
    Branch Measurement Points?
    • Console
    • Processor
    • Mike
  51. SIM Multi
    3 frequency responses in a branch?
    • Processor
    • Speaker + room
    • Result
  52. SIM Multi
    What does LONAXN mean?
    Left, On Axis, Near
  53. SIM Multi
    Right, Off Axis, Far
  54. SIM Multi
    2 variables for a primary mic placement?
    • +/- 10º On axis
    • Center of listening area
  55. SIM Multi
    What is an inverted processor?
    • An upside down EQ
    • A cut looks like a boost
    • A boost looks like a cut
  56. SIM Multi
    What is Single System?
    You are measuring one system at a time, the other systems are muted
  57. SIM Multi
    What is Lobe Study?
    The primary system you are studying is muted and you are looking at other systems interacting
  58. SIMII
    What applications is SIM 2.0 Lab Mode used for?
    Standalone measurement and research
  59. SIMII
    How do you properly patch for SIM II 2.0 Lab Mode?
    Drawing is still on the board
  60. SIMII
    What are the status panels?
    Information Windows at the Bottom of the Screen
  61. SIMII
    Data rejected means?
    One of the Ports has reached OVERLOAD
  62. SIMII
    2 windows in spectrum mode?
    • Reference
    • Measurement
  63. SIMII
    Dimensions in the Delay Finder screen?
    Relative Amplitude vs. Time Bottom window 10x magnification of the top window
  64. SIMII
    FIFO stands for?
    First In First Out
  65. SIMII
    Hotkeys for trace offset?
    ( + , - ) keys
  66. SIMII
    Hotkey for Pink Noise
    Alt + G
  67. SIMII
    AutoSet Delay hotkey?
  68. SIM Integration
    7 steps to analyze a stereo system?
    • 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
  69. SIM Integration
    What type of mic is used for acoustic measurement?
  70. SIM Integration
    What happens when a measurement mic is angled 90º from the source?
    At 5kHz and above it starts to roll off
  71. SIM Integration
    Where should secondary mic be placed?
    Anywhere in the listening area
  72. SIM Integration
    Typically, where should we not place the measurement mic?
    • Near walls or pillars
    • Exact center of rooms
    • In the aisles (except in some line array situations)
  73. SIM Integration
    When should we use sitting height for the measurement mic position?
    In recording studios & for front fills
  74. SIM Integration
    Why does Auto-EQ not work?
    Because it's blind
  75. SIM Integration
    What are the initial EQ considerations in a studio?
    • 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
  76. SIM Integration
    Which company manufactures the Galileo?
    Meyer Sound
  77. SIM Integration
    Name of the software used with the Galileo?
  78. SIM Integration
    What kind of cable is used to connect Galileo to the measurement system?
    SIM BUSS cable
  79. SIM Multi
    Label the 6 traces of the following
    • 1/processor
  80. SMAART
    Who developed SMAART?
    Sam Berkow
  81. SMAART
    Who owns & markets SMAART now?
    Rational Acoustics
  82. SMAART
    External hardware needed for SMAART?
    • Mic
    • Sound card (recommended)
    • Cabling/Adapters
  83. SMAART
    Info that must be entered in Spectrum Measurement Config Window?
    • Input
    • Device
  84. SMAART
    Info to be entered in Transfer Measurement Window?
    The pair of inputs you wish to compare
  85. SMAART
    2 operational modes for SMAART?
    • Real time
    • Impulse response
  86. SMAART
    2 measurement plot types that can be viewed within SMAART's spectrum mode?
    • RTA
    • Spectrograph
  87. SMAART
    2 measurement plot types that can be viewed in SMAART's transfer mode?
    • Phase
    • Magnitude
  88. SMAART
    Hotkey to save trace information?
  89. SMAART
    Hotkey to turn generator on/off?
  90. SMAART
    What point does SMAART use accumulators rather than FIFO?
    Above 16 averages (1 sec, 2 sec, etc)
  91. Acoustical Studies III
    What is reverberation?
    Sound that lingers in a room after signal is turned off
  92. Acoustical Studies III
    What is ITG?
    Initial Time Gap
  93. Acoustical Studies III
    Who was Wallace C. Sabine?
    • Founded field of architectural acoustics
    • RT60 formula
  94. Acoustical Studies III
    What is RT60?
    The time it take a sound to decay 60 dB
  95. Acoustical Studies III
    Sabine's classic equation for RT60?
    RT60 = 0.049V/Sa
  96. Acoustical Studies III
    How to calculate volume?
    Volume = LxWxH
  97. Acoustical Studies III
    How do you caculate for S?
    Multiply each surface by its two dimensions, then sum the all together
  98. Acoustical Studies III
    formula to calculate the average absorption coefficient of a room
    • v= volume
    • s= total surface
    • -
    • a= avg absorption coe
    • Sn= surfacd area 1 side
    • an= absorption coe 1 side
  99. Acoustical Studies III
    What changes are made to Sabine's equation when calculating for absorption of air?
    Add +4mV to the denominator of the Sabine equation
  100. Acoustical Studies III
    Fitzroys equation
    dont need to know
  101. TEF
    Who developed Theory of Time Delay Spectrometry?
    Richard Heyser
  102. TEF
    Dimensions in an ETC curve?
    • Amplitude
    • Time
  103. TEF
    TEF gathers data in which domain?
  104. TEF
    It takes _________ to measure time?
  105. TEF
    It takes ____________ to measure frequency?
  106. TEF
    Formula to calculate time window?
    Bandwidth / Sweep Rate
  107. TEF
    It may be more convenient to set ________ and __________ and let the computer set sweep rate and bandwidth.
    • Resolution
    • Sweep time
  108. TEF
    How to calculate reflection from speaker to floor to microphone?
    Pythagorean theorem
  109. TEF
    Why does TEF use 20microPascals for calibration?
    Threshold of hearing
  110. TEF
    How does Schroeder Reverse Integration Curve calculate it's data?
    From the right side of the screen back to the direct signal
  111. TEF
    Which two harmonics seem to do the most damage to the THD?
    • 3rd
    • 5th
  112. 5.1 CAL
    How can floating a panel help instead of mounting it?
    Absorbs more low frequencies
  113. 5.1 CAL
    Most home theaters should have an RT60 of ________ sec from 200Hz to 2kHz.
  114. 5.1 CAL
    Center speaker should not be more than ______ feet from height of L/R speakers?
  115. 5.1 CAL
    Two types of rear surround speakers?
    • Dipole
    • Direct Radiating
  116. 5.1 CAL
    Rear surround speakers should be at height of:
    At least 6 feet
  117. 5.1 CAL
    Good way to determine subwoofer placement to reduce room modes?
  118. 5.1 CAL
    Range for loudest sounds of a soundtrack?
  119. 5.1 CAL
    Range for quietest background effects on a soundtrack?
  120. 5.1 CAL
    3 companies that made 5.1 Audio Toolkit DVD?
    • Goldline
    • PMI
    • Dolby
  121. 5.1 CAL
    What help is a multiplexer when doing 5.1 systems?
    it allows multiple microphones to achieve "spatial-averaging"
  122. SIM III
    3 applications can SIM 3 be used for?
    • Device analysis
    • Speaker analysis
    • Room analysis
  123. SIM III
    2 screens in the Freq. Response tab in the Group view?
    • Result
    • Processor/Room
  124. SIM III
    3 windows in the Band Spectrum screen. What is their significance?
    • Console
    • Processor
    • Microphone
    • Representing a single branch
  125. SIM III
    How many different modes available?
    • Free Run
    • Single System
    • Lobe Study
    • Combined Systems
    • Show
    • Mic EQ
    • Console Check
    • Mic Compare
  126. SIM III
    2 types of Spectrum Analysis views in SIM 3?
    • Band spectrum
    • Line spectrum
  127. SIM III
    What are the 2 screens shown in the Delay Finder tab?
    • Processor amplitude
    • Room amplitude
  128. SIM III
    Where do you toggle phantom power for SIM 3?
    On the Front Panel tab
  129. SIM III
    Most significant upgrade made to SIM 3 from SIM II?
    • Ability to do multi-channel
    • CD-ROM
  130. SIM III
    What role does the Galileo processor play in SIM 3 multi-channel?
    It acts as the line switcher/processor in the SIM branch
  131. SIM III
    What function of the Galileo processor can be controlled from SIM 3?
    Switching outputs (muting/un-muting)
  132. EASE 2
    Which module shows 3D mapping?
  133. EASE 2
    What symbol used for Acoustic Probe?
    XYZ Axis man
  134. EASE 2
    Frequencies used for calculating RASTI?
    500 HZ & 2 kHz
  135. EASE 2
    RASTI stands for?
    Rapid Articulation Speech Transmission Index
  136. EASE 2
    %ALcons stands for?
    Percentage of Articulation Loss of Consonants
  137. EASE 2
    In EASE, what does C stand for?
  138. EASE 2
    What does C7 show?
    Direct/Reverberant ratio
  139. EASE 2
    What does C50 show?
    Speech intelligibility
  140. EASE 2
    What does C80 show?
    Music intelligibility
  141. EASE 2
    Module that demonstrates sound transmission and reflections beings
    scattered in a room showing SPL loss, orders of reflections and
    propagation time of signals?
    Ray tracing
    Heating Ventilation Air Conditioning
    Male carrier wave is between?
    What is normal in presence of noise?
    We involuntarily raise our voices due to the noise level
    What does NCB stand for?
    Balanced Noise Criteria
    Who developed NCB charts?
    Dr. Leo Beranek
    Recommended NCB for classroom?
    What is transmission loss?
    The loss of sound pressure through various materials
    Residential constructon: Interior walls made of?
    • 2 x 4's
    • 16" on center
    • 1/2" drywall both sides
    How many layers of drywall will provide the greatest value for transmission loss?