Term
| WHAT ARE THE MAIN REASONS FOR SOUND SYSTEM MEASUREMENT? |
|
Definition
•Maintenance
•Legal
•Artistic |
|
|
Term
| WHAT ARE THE 5 BASIC TEST SIGNALS USED FOR SOUND SYSTEM MEASUREMENT? |
|
Definition
•Pink Noise
•White Noise
•Sine Waves
•Shaped Noise
•Broadband Pulse |
|
|
Term
|
Definition
| •Equal energy per frequency |
|
|
Term
|
Definition
|
|
Term
| WHAT ARE THE 2 MOST COMMON WEIGHTING CURVES USED FOR SPL METERS? |
|
Definition
|
|
Term
| WHICH DIMENSION IS A REAL TIME ANALYZER MISSING? |
|
Definition
|
|
Term
| WHAT IS THE FOURIER TRANSFORM? |
|
Definition
| •A mathematical calculation – converts amplitude vs. time into amplitude vs. frequency |
|
|
Term
| WHAT MEASUREMENT SYSTEMS IN SHOW PRO PRIMARILY USE FFT’S? |
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
| IN EASE WHAT OTHER TYPES OF ROOM INPUT METHODS ARE THERE OTHER THAN VERTEX BY VERTEX? |
|
Definition
| •Extrude •Insert shape 3D •Insert - Load prototype |
|
|
Term
| NAME THE FIVE TYPES OF 3D SHAPES YOU CAN INSERT? |
|
Definition
•Cuboid
•Pyramid
•Cone
•Cylinder
•Cupola |
|
|
Term
| INTERIOR SURFACES ARE WHAT COLOR? |
|
Definition
|
|
Term
| IN EASE WHAT IS THE HOT KEY TO SAVE AND APPLY? |
|
Definition
|
|
Term
| WHY ARE MOST ROOMS MODELED IN THE NEGATIVE Y AXIS? |
|
Definition
| •That is the direction speakers are facing when inserted |
|
|
Term
| WHAT IS THE COMMAND FOR CUTTING A FACE INTO TWO FACES? |
|
Definition
|
|
Term
| WHAT IS THE HOTKEY TO DELETE UNATTACHED VERTICES? |
|
Definition
|
|
Term
| WHEN ADDING FLOOR TO CEILING COLUMNS IN A ROOM YOU MUST? |
|
Definition
|
|
Term
| WHAT ARE SOME OF THE PROTOTYPES AVAILABLE IN EASE? |
|
Definition
| •Amphitheater •Auditory •Basilica •Church •Coliseum •Gothic Dome •Multipurpose •Octagon •Opera •Redoubt •Shell •Sporting Hall •Stadium •Station •Theater •TriCube |
|
|
Term
|
Definition
| •A source or signal is either pushing positive or negative |
|
|
Term
| DESCRIBE PHASE IN FOUR WORDS? |
|
Definition
| •Frequency dependent time delay |
|
|
Term
| NAME THREE WAYS TO REVERSE POLARITY? |
|
Definition
•Swap pins 2&3 in cable
•Reversing the speaker wiring
•Polarity switch or setting (Console Processor Amp) |
|
|
Term
| TWO SIGNALS OF EQUAL AMPLITUDE AT 0 DEGREES OFFSET WILL RESULT IN? |
|
Definition
|
|
Term
| TWO SIGNALS OF EQUAL AMPLITUDE AT 180 DEGREES OFFSET WILL RESULT IN? |
|
Definition
| •Full Cancellation -100dB |
|
|
Term
| TWO SIGNALS OF EQUAL AMPLITUDE AT 120 DEGREES OFFSET WILL RESULT IN? |
|
Definition
| •No coupling or cancellation |
|
|
Term
| READING PHASE TRACES; IF THE TRACE IS ANGLED TO THE LEFT IT IS? |
|
Definition
|
|
Term
| READING PHASE TRACES; IF THE TRACE IS ANGLED TO THE RIGHT IT IS? |
|
Definition
|
|
Term
| READING PHASE TRACES; IF THE TRACE IS ANGLED STRAIGHT UP AND DOWN IT IS? |
|
Definition
|
|
Term
| WHAT APPLICATIONS IN SIM II 2.0 IS LAB MODE USED FOR? |
|
Definition
| •Standalone measurement and research |
|
|
Term
| WHAT ARE THE STATUS PANELS IN SIM II? |
|
Definition
| •Information windows at the bottom of the screen |
|
|
Term
| WHAT DOES DATA REJECTED MEAN IN SIM II? |
|
Definition
| •One of the ports has reached overload |
|
|
Term
| IN SIM II WHAT ARE THE 2 WINDOWS IN SPECTRUM MODE CALLED? |
|
Definition
| •Reference and Measurement |
|
|
Term
| IN SIM II WHAT ARE THE DIMENSIONS IN THE DELAY FINDER SCREEN? |
|
Definition
•Relative amplitude vs. time
(bottom window is a 10x magnification of the upper window). |
|
|
Term
| IN SIM II WHAT DOES FIFO STAND FOR? |
|
Definition
|
|
Term
| IN SIM II WHAT IS THE HOT KEYS FOR THE TRACE OFFSET? |
|
Definition
|
|
Term
| IN SIM II WHAT IS THE HOTKEY TO TURN THE GENERATOR – PINK NOISE ON? |
|
Definition
|
|
Term
| IN SIM II WHAT IS THE HOTKEY TO SET THE AUTOSET DELAY? |
|
Definition
|
|
Term
| WHAT ADVANTAGES DOES A PARAMETRIC EQ HAVE COMPARED TO A GRAPHIC EQ? |
|
Definition
| Adjustable center frequency and adjustable bandwidth |
|
|
Term
| WHAT IS COMPLIMENTARY EQUALIZATION? |
|
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
| WHAT ARE THE TWO INDEPENDENT FACTORS THAT DETERMINE THE MAGNITUDE AND FREQUENCY RESPONSE OF COMB FILTERING? |
|
Definition
•Time Offset
•Level Offset |
|
|
Term
| HOW DO YOU CALCULATE FOR COMB FILTERING? |
|
Definition
•F = 1/t(seconds)
•1st null = f/2 |
|
|
Term
| WHY IS IT CALLED COMB FILTERING? |
|
Definition
| On a linear scale it looks like the bristles of a comb. |
|
|
Term
| WHAT ACTIONS COULD YOU TAKE TO REDUCE COMB FILTERING? |
|
Definition
•Delays
•Level offset
•High Pass Filters
•Noise Gates |
|
|
Term
| WHY ARE EQ’s BLAMED FOR POOR RESULTS WHEN TRYING TO CORRECT COMB FILTERING? |
|
Definition
| It’s a time problem, it cannot be corrected with frequency. |
|
|
Term
| WHAT 3 APPLICATIONS THAT SIM 3 CAN BE USED FOR? |
|
Definition
•Device Analysis
•Speaker Analysis
•Room Analysis |
|
|
Term
| IN SIM 3 WHAT ARE THE 2 SCREENS IN THE FREQUENCY RESPONSE TAB IN THE "GROUP" VIEW? |
|
Definition
|
|
Term
| WHAT ARE THE 3 WINDOWS IN THE BAND SPECTRUM SCREEN AND WHAT IS THEIR SIGNIFICANCE? |
|
Definition
|
|
Term
| IN SIM 3 HOW MANY DIFFERENT MODES ARE AVAILABLE? |
|
Definition
•Free Run
•Single System
•Lobe Study
•Combine Systems
•Show
•Mic EQ
•Console Check
•Mic Compare |
|
|
Term
| WHAT ARE THE 2 TYPES OF SPECTRUM ANALYSIS VIEWS IN SIM 3? |
|
Definition
| Band Spectrum and Line Spectrum |
|
|
Term
| WHERE DO YOU TOGGLE PHANTOM POWER FOR SIM 3? |
|
Definition
|
|
Term
| WHAT IS THE MOST SIGNIFICANT UPGRADES MADE TO SIM 3 FROM SIM 2? |
|
Definition
| Ability to do multi-channel and CD-Rom |
|
|
Term
| WHAT ROLE DOES THE GALILEO PROCESSOR PLAY IN SIM 3 MULTI-CHANNEL? |
|
Definition
|
|
Term
| WHAT FUNCTION OF THE GALILEO PROCESSOR CAN BE CONTROLLED FROM SIM 3? |
|
Definition
|
|
Term
| How many mics can you input to 1 mic switcher? |
|
Definition
|
|
Term
| Name the Branch Measurement Points? |
|
Definition
|
|
Term
| Name the three frequency responses in a branch. |
|
Definition
•Processor
•Speaker+Room
•Result |
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
| What are the two variables for a Primary Mic Placement? |
|
Definition
| +/- 10 degrees on axis & center of listening area |
|
|
Term
|
Definition
| An upside down EQ, cuts look like boosts and boosts look like cuts. Used as a reference when tuning a system. |
|
|
Term
|
Definition
| When measuring one system at a time, the other systems are muted. |
|
|
Term
|
Definition
| The primary system being studied is muted while looking at the other systems interacting. Look for bleed-over. |
|
|
Term
Name the six traces of the following SIM Screen shot.
[image] |
|
Definition
|
|
Term
| What are the 7 steps to Analyze a Stereo System? |
|
Definition
•Preliminary Prep
•Interfacing SIM w/Sound System
•Initial Testing
•Testing for Harmonic Distortion
•Finding the Delay offset
•Initial EQ
•Adding the Systems Together
•Show Mode |
|
|
Term
| What kind of mic is used for acoustic measurement? |
|
Definition
| Omni Directional w/ Flat Freq Response |
|
|
Term
| What happens when a measurement microphone is angled 90 degrees from the source? |
|
Definition
| At 5k and above starts to roll off |
|
|
Term
| Where should the secondary mic placement be? |
|
Definition
| Anywhere in the listening area |
|
|
Term
| Typically, where should we not place the measurement microphone? |
|
Definition
•Near walls or Pillars
•Exact center of rooms
•In the Aisles (expect in line array situations) |
|
|
Term
| When should we use sitting height for the measurement microphone position? |
|
Definition
| In Recording Studios and Frontfills (First 3-4 rows) |
|
|
Term
| Why does Auto-EQ not work? |
|
Definition
|
|
Term
| What are the initial EQ considerations in Studios? |
|
Definition
•Sweet spot must be wide enough for both ears.
•Pay close attention to the s/n or coherence.
•Only EQ for the low q problems (wide) – don’t worry so much about the high q issues. |
|
|
Term
| Which company manufactures the Galileo? |
|
Definition
|
|
Term
| What is the name of the software used with the Galileo? |
|
Definition
|
|
Term
| What kind of cable is used to connect the Galileo to the measurement system? |
|
Definition
|
|
Term
| NAME THE 3 FORMS OF PARTICLE MOTION. |
|
Definition
•Cylindrical wave
•Transverse
•Longitudinal |
|
|
Term
| WHAT IS THE FORMULA TO CALCULATE THE SPEED OF SOUND, KNOWING ONLY THE TEMPERATURE? |
|
Definition
|
|
Term
| HOW DOES TEMPERATURE AFFECT THE VELOCITY OF SOUND? |
|
Definition
•If the temp goes up the speed of sound goes up.
•If the temp goes down the speed of sound goes down. |
|
|
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 a doubling of frequency |
|
|
Term
| HOW DO YOU CALCULATE HARMONICS? |
|
Definition
| •Multipliers of the fundamental |
|
|
Term
| WHAT IS THE FORMULA TO CALCULATE A RANGE OF OCTAVES? |
|
Definition
|
|
Term
|
Definition
| It is the sound that lingers in a room after the signal is turned off |
|
|
Term
|
Definition
|
|
Term
| WHO WAS WALLACE C. SABINE? |
|
Definition
| Founder of the Science of Architectural acoustics and developed the RT60 formula. |
|
|
Term
|
Definition
| The amount of time it takes for sound to decay 60dB |
|
|
Term
| WHAT IS SABINE’S CLASSIC EQUATION FOR RT60? |
|
Definition
|
|
Term
| WHAT IS THE FORMULA TO CALCULATE THE VOLUME OF A ROOM? |
|
Definition
| Volume = length x width x height |
|
|
Term
| HOW DO YOU CALCULATE FOR S (TOTAL SURFACE AREA)? |
|
Definition
| Multiply each surface by its 2 dimensions then sum them all together. |
|
|
Term
| WHAT IS THE FORMULA TO CALCULATE THE AVERAGE ABSORPTION COEFFICIENT OF A ROOM? |
|
Definition
ā = s1a1 + s2a2 + ….. + snan
S |
|
|
Term
| WHAT CHANGES ARE MADE TO THE CLASSIC SABINE EQUATION, WHEN CALCULATING FOR THE ABSORPTION OF AIR? |
|
Definition
| Add +4mV to the denominator of the sabine equation. |
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
| Average Absorption Coefficient |
|
|
Term
|
Definition
|
|
Term
|
Definition
| Absorption coefficient of that side |
|
|
Term
| WHO DEVELOPED THE THEORY OF TIME DELAY SPECTROMETRY? |
|
Definition
|
|
Term
| WHAT DIMENSIONS ARE IN AN ETC CURVE? |
|
Definition
|
|
Term
| THE TEF SYSTEM GATHERS IT’S DATA IN WHICH DOMAIN? |
|
Definition
|
|
Term
| IT TAKES __________ TO MEASURE TIME AND IT TAKES ________ TO MEASURE FREQUENCY. |
|
Definition
| IT TAKES _frequency_ TO MEASURE TIME AND IT TAKES _time_ TO MEASURE FREQUENCY. |
|
|
Term
| WHAT IS THE FORMULA TO CALCULATE THE TIME WINDOW? |
|
Definition
|
|
Term
| IT MAY BE MUCH MORE CONVENIENT TO SET A __________ AND __________ AND LET THE COMPUTER SET THE SWEEP RATE AND BANDWIDTH FOR US. |
|
Definition
| IT MAY BE MUCH MORE CONVENIENT TO SET A _resolution_ AND _sweep time_ AND LET THE COMPUTER SET THE SWEEP RATE AND BANDWIDTH FOR US. |
|
|
Term
| HOW DO YOU CALCULATE THE TOTAL DISTANCE OF A REFLECTION FROM A SPEAKER TO FLOOR TO MICROPHONE? |
|
Definition
|
|
Term
| WHY DOES TEF USE 20μPASCALS FOR CALIBRATING THE UNIT? |
|
Definition
| It is the threshold of hearing |
|
|
Term
| HOW DOES THE SCHROEDER REVERSE INTEGRATION CURVE CALCULATE ITS DATA? |
|
Definition
| From the right side of the screen back to the direct signal. |
|
|
Term
| WHAT ACOUSTICAL HELP CAN “FLOATING” AN ABSORPTION PANEL DO INSTEAD OF MOUNTING IT? |
|
Definition
•Absorbs more low frequencies
•Not just mids and highs |
|
|
Term
| MOST HOME THEATERS SHOULD HAVE AN RT60 OF ______ SECONDS FROM 200 HZ TO 2Khz. |
|
Definition
| MOST HOME THEATERS SHOULD HAVE AN RT60 OF _between 0.2 – 0.4 secs_ SECONDS FROM 200 HZ TO 2Khz. |
|
|
Term
| THE CENTER SPEAKER SHOULD NOT BE MORE THAN ____ FEET FROM THE HEIGHT OF THE L/R. |
|
Definition
| THE CENTER SPEAKER SHOULD NOT BE MORE THAN __2__ FEET FROM THE HEIGHT OF THE L/R. |
|
|
Term
| WHAT TWO TYPES OF SPEAKERS DISCUSSED ARE USED FOR REAR SURROUND SOUND? |
|
Definition
| Dipole and Direct Radiating |
|
|
Term
| REAR SURROUND SPEAKERS SHOULD BE AT A HEIGHT OF? |
|
Definition
|
|
Term
| WHAT IS A GOOD WAY TO DETERMINE THE SUBWOOFER PLACEMENT TO REDUCE ROOM MODES? |
|
Definition
| Using an RTA at the critical listening area, move the sub on a low cart across the front of the room, when you have the smoothest low frequency content that is the location, not where there is a boost of frequencies; that is possibly a room mode. |
|
|
Term
| WHAT SHOULD BE THE RANGE FOR THE LOUDEST EFFECTS OF A SOUNDTRACK? |
|
Definition
|
|
Term
| WHAT SHOULD BE THE RANGE FOR THE QUIETEST BACKGROUND EFFECTS OF A SOUNDTRACK? |
|
Definition
|
|
Term
| WHAT THREE COMPANIES MADE THE 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” |
|
|
