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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.
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. Cable wrapping method that reduces interference and makes it easier to unravel the cable.
DIN
Over/Under
Goals of Sound Effects
Neumann U47
2. The arm of the mic stand; Includes the angle adjust & telescopic adjust.
Sensitivity
Boom
Crystal and Ceramic Mic Use
Shockmount
3. The measuring device used for loudspeaker room response testing.
Motor
Real Time Analyzer (RTA)
Microphone Care...
Shotgun
4. 12V DC; 24V DC; 48V DC
Over/Over
3 Voltages for Phantom Power
Neumann U87
Field Mixer
5. Sounds that arrive at the 0
Neumann U87
Dynamic Mic Characteristics
Pistonphone
On -Axis
6. 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.
Clip
Snare Drum Mic Placement
Tube Condenser Microphone
Georg Neumann
7. Shows the level of self- noise from a microphone's internal electronics; Measured in dB (decibels).
AKG DYN60
Bidirectional
Faraday's Law of Magnetic Induction
Noise
8. Digital device used to Fourier Forms; Used to measure the specific number of sine waves in a specific frequency in a specific setting.
Piezoelectric Effect
FFT Analyzer
Highpass Filter
Baffle
9. Mic in which the diaphragm moves in response to sound waves and an attached pin/rod moves; Coil attached to pin/rod moves alone with the diaphragm.
Boom Placement Rule
Magnetic Microphone
Protractor & Ruler
Carbon Microphone Uses
10. An electrical device characterized by its capacity to store an electric charge;
Binaural Mic
Off-Axis
Sennheiser e604
Capacitor
11. DC Voltage Req'd for capsule polarizing voltage and internal mic preamps; 3 sources: External Power Supply Unit (PSU); Phantom Power; Battery.
Powering Condenser Microphones
Magnetic Induction Voltage
ORTF
AudioTechnica AT4040
12. Forward facing bipolar mics spaced 20cm apart.
Examples of Piezoelectric Material
Hypercardioid
Faulkner
Clement Ader
13. 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.
Electro Voice RE20
MSM
Pierre Curie
Rode NT1A
14. To capture two perspectives on the same sound.
Dual Mono
Fukada Tree
Boom
Noise
15. Device used to calibrate sound pressure measurement devices; Emits a single 1 kHz frequency over a sustained period of time.
Machine Head
Pistonphone
Types of Field Recording
Theatrophone
16. When using multiple microphones - the distance between microphones should be at least 3 times the distance from each microphone to its intended sound source.
Pierre Curie
Off-Axis
Wind Screens
3:1 Rule
17. 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;
Interference Tube...
RFI
M/S Stereo
Shure SM81
18. Three or more microphones working together to capture a stereo or surround image of the sound source.
Mid/Side
Shure SM58
Stereo Bar
Arrays
19. 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.
Speed of Sound Underwater
Interference Tube...
Increasing Output Voltage in Ribbon Mics
Off-Axis
20. Changes in air pressure from the front or the back can cause polarity cancellation; Sides have good rejection; Natural polar pattern is bidirectional.
Blumlein Pairing
Bandpass
Magnetic Induction Voltage
Pressure Gradient Capsules
21. Reduces the power of a signal used when the trim itself cannot prevent overload in the mic line level signal.
Pad
Pressure Capsules
Rode NT1A
Off-Axis
22. E = Blv - e - Electromotive Force (in volts) - B - is the magnetic field strength - l - is the length of the conductor - v - is the velocity of the conductor moving through the magnetic field
Max SPL
Types of Field Recording
Magnetic Induction Formula
Polar Pattern
23. Tube with ports down the side with the mic capsule at the bottom; Sounds entering the tube from on - axis interact inside the tube with the sounds coming in through the side ports - an interfere with each other in such a way as to partially cancel of
Trumpet Mic Placement
Capacitance
Percussion Mic Placement
Interference Tube...
24. Solid state version of the U67.
Damping
Neumann U87
Binaural Mic
AB Stereo
25. To oppose with equal weight or force as in the length of the boom arm versus the weight of the microphone.
Roswellite
Sennheiser MD441
Counterbalance
Pierre Curie
26. 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.
Bandpass
Neumann KM 184
Neumann U47
Angle of Max Rejection
27. A gradual - continuous decrease in low frequency response.
Roll-Off
Polar Pattern
Kick Tunnel
Magnetic Microphone
28. 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.
Shure Unidyne Series
Distance Factor
Clement Ader
Leslie Cabinet
29. Another name for condenser microphone.
Arrays
Piezoelectric Effect
Capacitor Microphone
Trumpet Mic Placement
30. 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.
Phasing
Neumann KM 184
Fukada Tree
3 Voltages for Phantom Power
31. Built by AKG for Telefunken and regarded as one of the best vintage condenser microphones ever.
Shure KSM Series
Baffle
Telefunken ELA- M251
Subcardioid
32. The reduction in the amplitude of a wave due to the dissipation of wave energy.
Damping
Subcardioid (Electrical Polar Pattern)
Nuvistor Tube
Sealed Ni-Cad Battery
33. Mid-Section of the mic stand; Includes the clutch.
Altec/Western Electric 639
Stereo Bar
Trumpet Mic Placement
Body
34. The attachment that holds a microphone in place on the mic stand; Comes in various shapes - sizes - and applications.
Subcardioid (Electrical Polar Pattern)
AudioTechnica AT4040
Electret Condenser
Clip
35. Tough & rugged microphone that contains an element consisting of a dome- shaped diaphragm and a moving 'voice coil'; Operates on principles of magnetic induction.
Subkick
Dynamic Microphone
Bandpass
Condenser Microphone
36. Big + & + (More front with less positive rear)
Subcardioid (Electrical Polar Pattern)
Proximity Effect
Baffle
Over/Under
37. Demonstrated the first stereophonic transmissions via the Theatrophone in 1881.
AKG D36
Packing
Arrays
Clement Ader
38. Used in adverse conditions to protect from elements like sand - or dust.
Cone
Vintage Tube Mic Precautions
Wind Screens
Omnidirectional
39. Sounds that arrive from angles other than the 0
Ribbon Microphone Sensitivity
AKG DYN60
Off-Axis
AKG D36
40. Voltage applied to piezoelectric material will cause it to deform or change shape; NO PHANTOM POWER!
FFT Analyzer
Crystal Mic Damage
AudioTechnica AT4051
Electret Condenser
41. Allow sound to reach the rear of the capsule/diaphragm - to create cardioid - supercardioid - and hypercardioid patterns In single capsule pressure gradient microphones.
Roll-Off
SASS-P
Phase Ports
Ribbon Microphone
42. Used to make sure you have accurate angles & capsule spacing when miking in stereo.
Electret Condenser
Shure SM58
AB Stereo
Protractor & Ruler
43. Angle of maximum signal rejection in a microphone polar pattern.
Null Angle
Off-Axis
NOS
Phasing
44. Considered to be the best mic ever made; VF14 Tube.
Sennheiser MD441
Neumann U47
Rudolf Goerike & Ernest Pless
Telefunken ELA- M251
45. Extremely narrow area of sensitivity in front with extended reach; Also has multiple lobes which vary in position with frequency; Not made from combining pure patterns - but created by using an interference tube.
Nuvistor Tube
Trumpet Mic Placement
Shotgun
End Address
46. Polar pattern produced when you add a little bit of bidirectional to the omni pattern.
Cardioid (Electrical Polar Pattern)
X/Y
Subcardioid
Dynamic Mic Characteristics
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
MSM
Capacitor Microphone
Angle of Max Rejection
Pascals (Pa)
48. 4800 ft/sec
Tuning Keys
Speed of Sound Underwater
Highpass Filter
Capacitance
49. Configured to simulate the spacing and directivity of human hearing; Box shape with two 'ears' on each side.
Clement Ader
SASS-P
Counterbalance
Phase Ports
50. The combination of the ribbon and magnet in a ribbon microphone.
A-Weighting
Theatrophone
Motor
Terry Bozzio
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