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Test your basic knowledge |
Microphones Theory
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Subject
:
engineering
Instructions:
Answer 50 questions in 15 minutes.
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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. Condenser; Cardioid/Hypercardioid; End Address; 48V Required; Manufactured by AKG; Can be powered by internal 9 V battery for field recording; Improves clarity of speech with the PB 1000 Presence Boost Adapter.
Near Coincident Pair
AKG C1000S
Real Time Analyzer (RTA)
Headstock
2. Condenser; Cardioid; Side Address; 48V Required; Large Diaphragm; Manufactured by AudioTechnica; Transformerless circuitry virtually eliminates low- frequency distortion.
Cardioid (Electrical Polar Pattern)
SASS-P
Powering Condenser Microphones
AudioTechnica AT4040
3. - Omnidirectional: 100% - Cardioid: 33% - Supercardioid: 27% - Hypercardioid: 25% - Bidirectional: 33%
M/S Stereo
Dynamic Microphone
Doubling Ribbon Length
Ambient Sound Sensitivity
4. Condenser; Cardioid; End Address; Manufactured by Shure; Small condenser design that is great for instrument recording.
Fundamental Frequency
Shure SM81
Snare Drum Mic Placement
Shure SM58
5. 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.
Shure Unidyne Series
Motor
AKG C414
AKG C1000S
6. The first cardioid pattern dynamic microphone.
AKG D12
Fingerboard
Matched Pairs
Proximity Effect
7. Tube microphone capable of SPL's over 140dB.
Vintage Tube Mic Precautions
X/Y
Bass Amp Mic Placement
Neumann U67
8. Method of creating low end effects from a bass drum by creating a tunnel at the mic end thus trapping sound and amplifying low end boost.
Kick Tunnel
Shure SM81
Jecklin Disk
Phase Ports
9. Forward facing bipolar mics spaced 20cm apart.
Crystal Mic Damage
Diaphragm
Faulkner
AudioTechnica AT4040
10. Angle of maximum signal rejection in a microphone polar pattern.
Striking
Null Angle
Fingerboard
Trumpet Mic Placement
11. French broadcasting stereo mic technique; An X-Y type with the mics 17cm apart and at a 110
ORTF
Dynamic Mic Characteristics
Examples of Piezoelectric Material
Neumann KM-84
12. Pair of cardioids facing to the front and rear - plus a sideways - facing figure 8; Mid- sides pair plus another rear- facing cardioid which is combined with the same Figure 8 mic for the surrounds.
MSM
Distance Factor (DSF)
Telefunken ELA- M251
Pistonphone
13. Occupying the same space and time.
Pistonphone
Dynamic Mic Characteristics
Coincident (Definition)
Parabolic Systems
14. Bioacoustic Research; Documentary Journalism; Radio; Film/TV Production; Audio Post Production.
Magnetic Induction Formula
Types of Field Recording
Examples of Piezoelectric Material
Packing
15. Solid State and Tube.
Types of Pre-Amps for Condenser Mics
Neumann U67
AudioTechnica AT4040
Shiny Box 46MXL
16. Allows all high frequencies to pass; Blocks the lower frequencies from being processed.
Trumpet Mic Placement
Parabolic Systems
Highpass Filter
Transducer Type
17. Bell Labs scientist that was an innovator of many spaced pair and arrayed miking techniques.
Harvey Fletcher
Magnetic Induction Formula
Reverse Polarity
Shotgun
18. When using multiple microphones - the distance between microphones should be at least 3 times the distance from each microphone to its intended sound source.
Goals of Sound Effects
Electret Condenser
Microphone Care...
3:1 Rule
19. Older ribbon microphone weighing 8.5 lbs. nearly all of it the large magnet!
Cone
Ribbon Mic Characteristics
Powering Condenser Microphones
RCA 44BX
20. Raises the body of the microphone increasing height.
Headstock
Clutch
E.C. Wente
Legs
21. The combination of the ribbon and magnet in a ribbon microphone.
Pad
Motor
Arrays
Pressure Gradient Capsules
22. Shure's newer ribbon studio mics; KSM 353 & 313 (Roswellite); KSM 44 - 32 - & 27.
Shure KSM Series
Distance Factor (DSF)
LRFB
Pressure Capsules
23. Rotating speaker cabinet design featuring separate treble and bass drivers that can switch speeds; Speaker rotate from front to back creating a Doppler effect; Resulted in new spatial perception for each note. Stereo miked up top and single miked at
Angle of Max Rejection
Leslie Cabinet
Reverse Polarity
Proximity Effect
24. Cable wrapping method that reduces interference and makes it easier to unravel the cable.
Over/Under
Faulkner
Theatrophone
Mono
25. Reduces the power of a signal used when the trim itself cannot prevent overload in the mic line level signal.
Sennheiser MD421
Stereosonic
Pad
Roll-Off
26. Carbon; Ceramic/Crystal; Magnetic/Dynamic; Ribbon; Condenser
Proximity Effect
5 Common Microphone Transducers
Doubling Ribbon Length
Stereo Bar
27. Use coincident or near coincident pairings; Too many microphones will cause phasing issues.
Percussion Mic Placement
Omnidirectional (Electrical Polar Pattern)
Electret Condenser
Theatrophone
28. The outer covering of a microphone.
Capacitance
Diaphragm
Casing
Crystal & Ceramic Microphones
29. Mounts on a single stand to provide for adjustable spacing and angling between mics.
Spaced Pairs
Stereo Bar
Pickup
E.C. Wente
30. A stereo miking technique similar to coincident pair - where the mics are set up with some distance between them; Distance and angle of microphones may differ; Creates a more defined stereo image; Produces very sharp images; Provides more 'air'.
Shure SM58
Near Coincident Pair
Dynamic Microphone
AKG D36
31. Very robust and durable; Used in telephones until 1990's; Currently finds applications for military use.
DIN
Carbon Microphone Uses
Bidirectional
Coincident Pair
32. DC Voltage Req'd for capsule polarizing voltage and internal mic preamps; 3 sources: External Power Supply Unit (PSU); Phantom Power; Battery.
Over/Under
RCA 44BX
Fundamental Frequency
Powering Condenser Microphones
33. Commonly found in acoustic guitar pickups; Ceramic piezoelectric material is used in hydrophones (underwater mics) because of durability.
FFT Analyzer
Off-Axis
Crystal and Ceramic Mic Use
AKG C12
34. First microphone invented by Georg Neumann
Reisz Marble Mic
Subcardioid
Blumlein Pairing
RCA 44BX
35. Vintage Tube Mics hold voltage after being unplugged; Be sure grounds are connected to power cord and that the charge has left microphone prior to striking.
Stereosonic
Shiny Box 46MXL
Vintage Tube Mic Precautions
Tube Condenser Microphone
36. The first AKG dynamic microphone.
AKG DYN60
Angle of Max Rejection
MSM
Matched Pairs
37. Will yield a 6dB increase in output - but will cause a loss of high frequency response.
Lowpass Filter
Doubling Ribbon Length
Measurement Mics
Ribbon Mic Characteristics
38. 12V DC; 24V DC; 48V DC
Coincident Pair
Trombone Mic Placement
3 Voltages for Phantom Power
Altec/Western Electric 639
39. Condenser; Cardioid; Side Address; 48V Required; Manufactured by AudioTechnica; Ideal for project/home- studio applications; Low price; Remains the low cost performance standard in side- address condenser mics.
Sennheiser MD421
Field Mixer
Harvey Fletcher
AudioTechnica AT2020
40. Phenomenon causing carbon microphones to lose sensitivity as granules become packed together over extended use; To remedy problem mic is gently rapped on hard surface.
Reverse Polarity
Packing
RFI
Baffle
41. Mics in which sound waves vibrate a piezoelectric crystal that generates a varying voltage.
Blumlein Pairing
Mono
Crystal & Ceramic Microphones
Bandpass
42. 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
Shotgun
Machine Head
Cardioid
43. Commonly utilize large diaphragm dynamic mics.
Bass Amp Mic Placement
Trumpet Mic Placement
Stereo Bar
Roll-Off
44. Tough & rugged; Can work in extremely high SPL environments; Less responsive to transient frequencies b/c of diaphragm mass is heavier than sound waves.
Microphone Storage
AudioTechnica AT2020
Frets
Dynamic Mic Characteristics
45. Device used to measure sound loudness; Often used to measure and balance the loudness of each speaker in a home - studio - or live venue or theater system.
Capacitor Microphone
Types of Field Recording
Bidirectional (Electrical Polar Pattern)
SPL Meter
46. 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.
Microphone Care...
Protractor & Ruler
Guitar Amp Mic Placement
End Address
47. 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
Bidirectional
Sensitivity
Counterbalance
Pascals (Pa)
48. Utilized primarily on condenser and ribbon mics to isolate it from vibrations that might otherwise be transmitted to the microphone through the mic stand.
Bass Amp Mic Placement
Shockmount
Shure SM81
Proximity Effect
49. Dynamic; Cardioid; End Address; Manufactured by Shure; Considered the industry standard for live vocal performance microphones; One of the best- selling microphones in the world.
Shure SM58
Examples of Piezoelectric Material
Cardioid
Bass Amp Mic Placement
50. One of the oldest mics; Diaphragm mounted on & compresses cup of tiny granules of carbon (100 microns big) that increase current flow when compressed by sound waves and vary electrical current; Also called Resistance Mics;
Pickup
Supercardioid
Carbon Microphone
Shure SM57
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