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Test your basic knowledge |
Microphones Theory
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Study First
Subject
:
engineering
Instructions:
Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
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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. 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.
3:1 Rule
Pop Filter
Georg Neumann
Bidirectional (Electrical Polar Pattern)
2. Flat plate that controls or directs the flow of sound energy in a crystal/ceramic mic.
Baffle
Wind Screens
3 Voltages for Phantom Power
Ribbon Mic Characteristics
3. The part of the guitar you turn to tune the strings in order to get the right sound out of the guitar when one plays.
AB Stereo
Stereo
Snare Drum Mic Placement
Tuning Keys
4. Delicate and require extreme care; NO PHANTOM POWER; Becoming more popular than ever because of highly efficient magnets - lower manufacturing costs - and great fidelity.
Alan Blumlein
Neumann U87
Hypercardioid/Supercardioid (Electrical Polar Pattern)
Ribbon Mic Characteristics
5. Tough & rugged microphone that contains an element consisting of a dome- shaped diaphragm and a moving 'voice coil'; Operates on principles of magnetic induction.
Trumpet Mic Placement
Dynamic Microphone
Machine Head
DIN
6. 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.
AKG DYN60
Trumpet Mic Placement
3 Voltages for Phantom Power
Decca Tree
7. 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
Coverage Angle
Shiny Box 46MXL
Pascals (Pa)
Backplate
8. An electrical device characterized by its capacity to store an electric charge;
Capacitor
Powering Condenser Microphones
Cardioid (Electrical Polar Pattern)
Magnetic Induction Voltage
9. Big + & + (More front with less positive rear)
Soundfield
Striking
Subcardioid (Electrical Polar Pattern)
Harvey Fletcher
10. Timing difference between two waves; Waves interfere cancelling each other out and altering frequency response; Measured in degrees; Can be caused by reflections of sound waves; Can be reduced by putting cabinet or amp at an angle.
Telefunken ELA- M251
Phasing
Fundamental Frequency
Rode NT1A
11. Modeled to mimic a human head for extremely good spatialization; Shaped like a human head.
Shure SM57
Baffle
Crystal and Ceramic Mic Use
Binaural Mic
12. To oppose with equal weight or force as in the length of the boom arm versus the weight of the microphone.
A-Weighting
Neumann U67
Counterbalance
AB Stereo
13. Electro- acoustic device attached to a transducer that vibrates to receive or produce sound waves which put the device into motion.
Diaphragm
Subcardioid
Legs
SASS-P
14. 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.
LRFB
Supercardioid
Frets
Packing
15. Best signal- to- noise ratio; Minimal phase cancellation; Quality representation of what is being recorded; Attempt to ignore unwanted external noise.
Neumann KM 184
Sennheiser MD421
Goals of Sound Effects
AB Stereo
16. Condenser; Cardioid; Side Address; 48V Required; Large Diaphragm; Manufactured by Rode; Widely recognised as the world's quietest studio microphone; Ideal for vocals - voiceover - and acoustic instruments.
Microphone (Word Etymology)
Shure SM57
Rode NT1A
Side Address
17. Measurement of the mic's sensitivity; Measured in mV/Pa (millivolts per Pascal).
Spaced Pairs
Bidirectional
Condenser Microphone
Sensitivity
18. The measuring device used for loudspeaker room response testing.
Parabolic Systems
Real Time Analyzer (RTA)
Pad
Faraday's Law of Magnetic Induction
19. An electromagnetic microphone - in which a thin - corrugated ribbon is suspended within a high magnetic flux field; Excellent transient response due to the small amount of acoustic energy required to move diaphragm.
Ribbon Microphone
Phase Ports
Measurement Mics
Baffle
20. 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.
Frets
Pop Filter
E.C. Wente
Percussion Mic Placement
21. Considered to be the best mic ever made; VF14 Tube.
Nuvistor Tube
RCA 44BX
Neumann U47
Decca Tree
22. Used in adverse conditions to protect from elements like sand - or dust.
Trombone Mic Placement
Stereo
Wind Screens
Interference Tube...
23. Raises the body of the microphone increasing height.
On -Axis
Clutch
Microphone (Word Etymology)
DIN
24. 4 coincident mics each positioned at 90
NOS
LRFB
Capacitance
Bass Amp Mic Placement
25. + (only); (Front capsule alone)
Baffle
Georg Neumann
Coincident Pair
Cardioid (Electrical Polar Pattern)
26. 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'.
LRFB
Crystal Mic Damage
Near Coincident Pair
Magnetic Induction Voltage
27. Early example of switchable polar patterns; Had both a dynamic and a ribbon capsule inside of it which when combined produced other polar patterns.
Altec/Western Electric 639
Nuvistor Tube
Capacitor
Electret Condenser
28. German broadcasting stereo mic technique; An X-Y type with the mics 20cm apart and at a 90
Null Angle
DIN
Types of Field Recording
Microphone (Word Etymology)
29. Allow sound to reach the rear of the capsule/diaphragm - to create cardioid - supercardioid - and hypercardioid patterns In single capsule pressure gradient microphones.
Phase Ports
Faulkner
Transient Response
Spherical Mic
30. Founded AKG at the end of WWII in Austria.
End Address
Rudolf Goerike & Ernest Pless
Coincident (Definition)
Nuvistor Tube
31. The graphic representation plot of the sensitivity of a microphone from any direction over a 360
Subkick
Theatrophone
Polar Pattern
FFT Analyzer
32. Solid State and Tube.
C-Weighting
Soundfield
Types of Pre-Amps for Condenser Mics
Model 3B Carbon Microphone
33. 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.
Capacitor Microphone
Kick Tunnel
Reisz Marble Mic
Parabolic Systems
34. Use coincident or near coincident pairings; Too many microphones will cause phasing issues.
Protractor & Ruler
Percussion Mic Placement
Dual Mono
Rode NT1A
35. Increasing magnetic field strength is the only practical means of increasing output voltage; Conductor movement is limited due to tension of the ribbon; and ribbon length increases lead to a loss of high frequency response.
Electret Condenser
Ambient Sound Sensitivity
Body
Increasing Output Voltage in Ribbon Mics
36. When using two microphones reverse the polarity of the bottom mic.
Snare Drum Mic Placement
Alan Blumlein
Shure Unidyne Series
SPL Meter
37. Condenser; Cardioid; Side Address; 48V Required; Large Diaphragm; Manufactured by AudioTechnica; Transformerless circuitry virtually eliminates low- frequency distortion.
Clement Ader
Supercardioid
Magnetic Induction Formula
AudioTechnica AT4040
38. Angle of maximum signal rejection in a microphone polar pattern.
Null Angle
Dynamic Microphone
Fingerboard
Magnetic Induction Formula
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.
AudioTechnica AT2020
Electret (Word Etymology)
Carbon Microphone Uses
Phasing
40. Pair of omni mic elements mounted on opposite sides of a spherical shaped capsule.
Types of Field Recording
Cone
Guitar Amp Mic Placement
Spherical Mic
41. 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.
Mono
Bidirectional (Electrical Polar Pattern)
Supercardioid
Distance Factor
42. Omnidirectional: 0 - Cardioid: 8 - Supercardioid: 12 dB - Hypercardioid: 6 dB - Bidirectional: 0
Shockmount
Backplate
Rear Sensitivity (Relative to Front)
Matched Pairs
43. The tuning machines of a guitar; Part of the tuning key that strings are threaded through and twisted.
AKG C1000S
RFI
Machine Head
Angle of Max Rejection
44. The measure of how quickly a mic's diaphragm will react when it is hit by an acoustic sound wave.
Magnetic Induction Voltage
Microphone Care...
Transient Response
Alan Blumlein
45. Proportional to: Magnetic field strength; Length of the conductor; Velocity of conductor moving through the magnetic field.
Boom Placement Rule
Magnetic Induction Voltage
3 Voltages for Phantom Power
Cone
46. DC Voltage Req'd for capsule polarizing voltage and internal mic preamps; 3 sources: External Power Supply Unit (PSU); Phantom Power; Battery.
Neumann KM 184
Powering Condenser Microphones
Polar Pattern
Doubling Ribbon Length
47. Sounds that may be broadcast over the radio or internet.
Faraday Cage
Mono
Spaced Pairs
Interference Tube...
48. Device or transducer used for converting sound waves or acoustical energy into electrical energy
Tube Condenser Microphone
Condenser Diaphragm
Fukada Tree
Microphone (Definition)
49. Often look like handheld vocal mics; Talk or sing into the end of the microphone.
MSM
Hydrophone
End Address
Real Time Analyzer (RTA)
50. The reduction in the amplitude of a wave due to the dissipation of wave energy.
Spherical Mic
Damping
Snare Drum Mic Placement
Ribbon Microphone Sensitivity
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