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Test your basic knowledge |
Microphones Theory
Start Test
Study First
Subject
:
engineering
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. The method by which microphones are classified.
Transducer Type
Bidirectional
Magnetic Microphone
ORTF
2. The graphic representation plot of the sensitivity of a microphone from any direction over a 360
Magnetic Microphone
Polar Pattern
Coincident (Definition)
Baffle
3. More compelling sound - giving both depth and perspective.
Sennheiser MD441
Bidirectional (Electrical Polar Pattern)
Stereo
AKG DYN60
4. 4 to 6 ft. from the player; Mic should be placed below the line of sight of the bell - rotated at about 40 degrees off- axis - and tilted upward.
Fingerboard
Shure SM58
Trumpet Mic Placement
Pad
5. Works exactly like condenser mic but one of the two plates is manufactured as a capsule with a permanent static charge so there is no external power source necessary; Requires phantom or battery to charge internal mic preamp.
Subcardioid
Wind Screens
Faulkner
Electret Condenser
6. Small coil of wire wrapped around the plastic or aluminum diaphragm of a dynamic microphone.
Boom Placement Rule
Headstock
Clip
Voice Coil
7. This is what is measured to produce an electrical signal in condenser mics; This changes as sound waves strike the diaphragm causing the distance to the back plate to change.
Harvey Fletcher
Capacitance
Parabolic Systems
Bass Amp Mic Placement
8. Tough & rugged; Can work in extremely high SPL environments; Less responsive to transient frequencies b/c of diaphragm mass is heavier than sound waves.
Reverse Polarity
Ribbon Mic Characteristics
End Address
Dynamic Mic Characteristics
9. The attachment that holds a microphone in place on the mic stand; Comes in various shapes - sizes - and applications.
Clip
Pickup
Increasing Output Voltage in Ribbon Mics
RCA 44BX
10. Term coined by Sir Charles Wheatstone derived from the Greek words 'micro' (small) & 'phon' (sound).
Microphone (Word Etymology)
Legs
Highpass Filter
3 Voltages for Phantom Power
11. First to mass produce the condenser microphone in 1929; Improved cutting lathe technology by developing direct drive turntables; Invents 48V Phantom Power to power the new condenser microphone for Norwegian State Television.
Georg Neumann
Capacitor
Jecklin Disk
Packing
12. Measurement of Sound Pressure; stated as being N/m2 with a Newton being a measurement of force equal to about 9.8 lbs; Equal to 94dB SPL
Pascals (Pa)
Damping
Crystal Mic Damage
Distance Factor (DSF)
13. Measurement similar to how our hearing works in frequency response charts.
Speed of Sound Underwater
Fundamental Frequency
A-Weighting
Shiny Box 46MXL
14. Mics in which sound waves vibrate a piezoelectric crystal that generates a varying voltage.
Legs
Measurement Mics
Sennheiser MD441
Crystal & Ceramic Microphones
15. When using two microphones reverse the polarity of the bottom mic.
Faraday's Law of Magnetic Induction
Snare Drum Mic Placement
Electro Voice RE20
Proximity Effect
16. Flat plate that controls or directs the flow of sound energy in a crystal/ceramic mic.
Protractor & Ruler
Baffle
Mid/Side
Magnetic Microphone
17. Big + & + (More front with less positive rear)
Georg Neumann
Sennheiser MD441
Arrays
Subcardioid (Electrical Polar Pattern)
18. Adds two outer right and left rear facing mics to a Decca tree for surround sound depth.
Coincident Pair
Fukada Tree
Sennheiser MD441
Protractor & Ruler
19. Big + & - (More front with less opposite rear)
Roll-Off
Measurement Mics
Pressure Gradient Capsules
Hypercardioid/Supercardioid (Electrical Polar Pattern)
20. Measurement of the mic's sensitivity; Measured in mV/Pa (millivolts per Pascal).
Leslie Cabinet
Shockmount
Sensitivity
Powering Condenser Microphones
21. Older ribbon microphone weighing 8.5 lbs. nearly all of it the large magnet!
LRFB
Pressure Gradient Capsules
Rode NT1A
RCA 44BX
22. Shure's newer ribbon studio mics; KSM 353 & 313 (Roswellite); KSM 44 - 32 - & 27.
Shure KSM Series
Harvey Fletcher
5 Common Microphone Transducers
Side Address
23. When miking an amp placing it near the center of this will make it sound brighter; Miking near the outer edge of this will make it sound darker and more mellow in tone.
Cone
Null Angle
Shure KSM Series
Magnetic Induction Formula
24. Close mic placement can help guard again bleed from other instruments and takes advantage of proximity effect; Center of cone = Brighter; Outside of cone = Darker; Reflections can create phase issues (can be reduced by putting the cabinet at an angle
Condenser Microphone
Guitar Amp Mic Placement
AKG D36
NOS
25. Basket/grille made out of a specific type of copper wire to block protect the mic from physical damage and to protect the mic from stray RFI
Powering Condenser Microphones
Faraday Cage
Shockmount
AKG D36
26. + & + (Front & rear in equal positive amounts)
Jecklin Disk
Omnidirectional (Electrical Polar Pattern)
Max SPL
Mid/Side
27. Angle of maximum signal rejection in a microphone polar pattern.
Interference Tube...
Over/Under
RFI
Null Angle
28. Captures sounds arriving 90
Microphone (Word Etymology)
Coincident Pair
Sennheiser MD441
Parabolic Systems
29. Known as 'The Bottle' this was the first mass - produced condenser mic.
Mono
Neumann CMV3
Faraday Cage
Crystal & Ceramic Microphones
30. Never store mic in a damp place; Keep dirt & dust away from the mic; Never 'pop' test the mic; Check if a mic is working by lightly scratching the grill.
X/Y
Damping
Fingerboard
Microphone Care...
31. Fixed plate that is charged with polarized voltage found in condenser mics; Usually constructed of milled brass; Has a number of holes drilled in it to provide damping for diaphragm.
Doubling Ribbon Length
Backplate
Coincident (Definition)
Rode NT1A
32. To break down or disassemble any portion of a set or stage set- up.
RFI
Carbon Microphone Uses
Striking
SASS-P
33. Best signal- to- noise ratio; Minimal phase cancellation; Quality representation of what is being recorded; Attempt to ignore unwanted external noise.
Shotgun
Soundfield
Roswellite
Goals of Sound Effects
34. Condenser; Multiple; Side Address; 48V Required; Manufactured by AKG; Dual Diaphragm; Nine selectable pickup patterns; Peak Hold LED; The reference microphone for almost all comparative microphone tests.
AKG C414
Protractor & Ruler
Neumann U47
Measurement Mics
35. 1 Bidirectional & 1 Cardioid placed coincidentally; Bidirectional faces left and right and cardioid faces the sound; Gives control of the focus and size of the stereo image;
M/S Stereo
On -Axis
Shiny Box 46MXL
Microphone (Definition)
36. Using omnidirectional as a reference of 1 - this is a measurement of how much farther you can be from a mic to achieve equal output level in other polar pattern microphones.
Blumlein Pairing
Distance Factor
Soundfield
Doubling Ribbon Length
37. Carbon; Ceramic/Crystal; Magnetic/Dynamic; Ribbon; Condenser
Faraday Cage
Dual Mono
5 Common Microphone Transducers
FFT Analyzer
38. 4800 ft/sec
Speed of Sound Underwater
Dynamic Range
Electret Condenser
Clip
39. Keep in proper case; Never disassemble shockmounts
Electret Condenser
Microphone Storage
3 Voltages for Phantom Power
Wind Screens
40. - Omnidirectional: 100% - Cardioid: 33% - Supercardioid: 27% - Hypercardioid: 25% - Bidirectional: 33%
Damping
Machine Head
Clement Ader
Ambient Sound Sensitivity
41. Derived from two words; 'electr' from electrostatic and 'et' from magnet.
Ribbon Mic Characteristics
Proximity Effect
Increasing Output Voltage in Ribbon Mics
Electret (Word Etymology)
42. Stereo configuration using a spaced pair 3-10 feet apart.
Tuning Keys
AB Stereo
Ribbon Microphone Sensitivity
Diaphragm
43. Used to filter heating current in certain mics; Invented by Georg Neumann.
Clip
Packing
Sealed Ni-Cad Battery
Hypercardioid
44. The property of certain crystals that causes them to produce voltage when a mechanical pressure such as sound vibrations is applied to them; Originates from Greek word 'piezein' (to compress).
Condenser Microphone
Sennheiser MD441
Piezoelectric Effect
Binaural Mic
45. Tube manufactured for the new version of the AKG C12 (called the C12-A); Powered by Norelco.
Highpass Filter
Microphone (Word Etymology)
Nuvistor Tube
Shure Unidyne Series
46. Overall measurement close to the overall sound level in frequency response charts.
X/Y
Wind Screens
A-Weighting
C-Weighting
47. The first phantom powered condenser microphone designed for use by Georg Neumann for Norwegian State Television.
Body
Guitar Amp Mic Placement
NOS
Neumann KM-84
48. Condenser; Cardioid; End Address; 48V Required; Manufactured by Neumann; Consists of three compact miniature microphones; Has a gentle rise at about 9 kHz that provides tonal balance that is fresher and livelier.
Highpass Filter
Neumann KM 184
Coincident Pair
Vintage Tube Mic Precautions
49. Omnidirectional: 360
Coverage Angle
Clutch
Protractor & Ruler
Snare Drum Mic Placement
50. Barrier made of shaped wire covered with a piece of nylon that is placed between a sensitive mic and the talent to avoid damage to the diaphragm of the mic.
Near Coincident Pair
Pop Filter
Coincident (Definition)
Lowpass Filter