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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. Delicate and require extreme care; NO PHANTOM POWER; Becoming more popular than ever because of highly efficient magnets - lower manufacturing costs - and great fidelity.
On -Axis
Subcardioid (Electrical Polar Pattern)
Ribbon Mic Characteristics
Bass Amp Mic Placement
2. Voltage applied to piezoelectric material will cause it to deform or change shape; NO PHANTOM POWER!
Crystal Mic Damage
Cardioid (Electrical Polar Pattern)
Carbon Microphone Uses
Proximity Effect
3. 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.
Measurement Mics
Supercardioid
AKG C1000S
Pressure Gradient Capsules
4. Derived from two words; 'electr' from electrostatic and 'et' from magnet.
Electret (Word Etymology)
ORTF
Bass Amp Mic Placement
Polar Pattern
5. The outer covering of a microphone.
Microphone Care...
Altec/Western Electric 639
Casing
Distance Factor (DSF)
6. Sub- frequency (below 100Hz) capture device designed for use with kick drums and floor toms as an alternative or supplement to a traditional microphone.
Subkick
3 Voltages for Phantom Power
Leslie Cabinet
Shockmount
7. Considered to be the best mic ever made; VF14 Tube.
Spherical Mic
Legs
Examples of Piezoelectric Material
Neumann U47
8. The head or top of the guitar where the tuning pegs are located.
Roll-Off
Electret Condenser
Headstock
Altec/Western Electric 639
9. + (only); (Front capsule alone)
Bidirectional
Over/Over
Dual Mono
Cardioid (Electrical Polar Pattern)
10. Configured to simulate the spacing and directivity of human hearing; Box shape with two 'ears' on each side.
LRFB
SASS-P
5 Common Microphone Transducers
On -Axis
11. The attachment that holds a microphone in place on the mic stand; Comes in various shapes - sizes - and applications.
AudioTechnica AT2020
Clip
NOS
Off-Axis
12. Part of a mic stand that the mic stands on.
Vintage Tube Mic Precautions
Rudolf Goerike & Ernest Pless
Legs
Tuning Keys
13. Changes in air pressure from the front or the back can cause polarity cancellation; Sides have good rejection; Natural polar pattern is bidirectional.
Over/Over
Pressure Gradient Capsules
Interference Tube...
AKG C1000S
14. Most sensitive to sounds arriving from the front while rejecting sounds from rear; Shaped like a heart; Rejects most signals from 180
Coverage Angle
Cardioid
Pierre Curie
Dynamic Microphone
15. Used to make sure you have accurate angles & capsule spacing when miking in stereo.
Ribbon Microphone Sensitivity
Protractor & Ruler
Shure SM58
AKG D36
16. To break down or disassemble any portion of a set or stage set- up.
Fukada Tree
Pressure Capsules
Types of Field Recording
Striking
17. Solid state version of the U67.
Supercardioid
Neumann U87
Polar Pattern
Shure SM58
18. The reduction in the amplitude of a wave due to the dissipation of wave energy.
Coincident Pair
Damping
Piezoelectric Effect
RFI
19. 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
Model 3B Carbon Microphone
Counterbalance
Boom Placement Rule
Magnetic Induction Formula
20. Moving a conductor (a coil of wire) through a magnetic field will cause a voltage to be induced across the conductor.
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21. 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.
Dynamic Mic Characteristics
Capacitance
Faraday's Law of Magnetic Induction
Crystal and Ceramic Mic Use
22. The combination of the ribbon and magnet in a ribbon microphone.
Electro Voice RE20
Motor
Faraday's Law of Magnetic Induction
Model 3B Carbon Microphone
23. The first microphone sold by Shure; Military awarded Shure a contract to build microphones in WWII.
Model 3B Carbon Microphone
Sennheiser MD421
Measurement Mics
Pop Filter
24. The first dynamic microphone with changeable polar patterns.
AKG D36
Frets
Neumann U67
Pickup
25. 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'.
Near Coincident Pair
5 Common Microphone Transducers
AudioTechnica AT4040
Mono
26. Device or transducer used for converting sound waves or acoustical energy into electrical energy
3 Voltages for Phantom Power
SASS-P
Microphone (Definition)
Nuvistor Tube
27. Very robust and durable; Used in telephones until 1990's; Currently finds applications for military use.
Hydrophone
Carbon Microphone Uses
Doubling Ribbon Length
Shiny Box 46MXL
28. The arm of the mic stand; Includes the angle adjust & telescopic adjust.
Boom
Bass Amp Mic Placement
Over/Over
End Address
29. Omnidirectional: 0 - Cardioid: 8 - Supercardioid: 12 dB - Hypercardioid: 6 dB - Bidirectional: 0
Legs
Neumann KM-84
Shockmount
Rear Sensitivity (Relative to Front)
30. The first cardioid pattern dynamic microphone.
AKG D12
Capacitance
Shockmount
Casing
31. 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
Highpass Filter
Nuvistor Tube
Sennheiser e604
Pascals (Pa)
32. Mics in which sound waves vibrate a piezoelectric crystal that generates a varying voltage.
Crystal & Ceramic Microphones
Striking
Subkick
AB Stereo
33. Shows the max sound pressure level possible with a certain amount of distortion; Measured in dB (decibels).
Body
Tube Condenser Microphone
Max SPL
Roll-Off
34. 2 - 4 ft. from player; Placed below the line of sight of the bell - rotated at about 30 degrees off axis - and tilted upward.
Omnidirectional (Electrical Polar Pattern)
Doubling Ribbon Length
Subkick
Trombone Mic Placement
35. Causes an increase in low frequency response as one gets closer to the source.
Sennheiser MD441
Body
LRFB
Proximity Effect
36. Small microphone attached to the bridge of a string bass or to an acoustic guitar to amplify its sound.
Parabolic Systems
Coincident (Definition)
Pickup
Electret (Word Etymology)
37. 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
Capacitance
Over/Under
Packing
38. Sounds that arrive from angles other than the 0
Off-Axis
Magnetic Microphone
AudioTechnica AT2020
End Address
39. Quartz; Barium Titaniate - Tourmaline; Rochelle Salt - and even cane sugar.
Condenser Microphone
Examples of Piezoelectric Material
Georg Neumann
Sealed Ni-Cad Battery
40. Sensitive in a slightly narrower pattern in the front than cardioid and has a small lobe at rear; Rejects most signals arriving from 125
Supercardioid
Shure SM81
Wind Screens
Polar Pattern
41. Older ribbon microphone weighing 8.5 lbs. nearly all of it the large magnet!
Pad
Pierre Curie
RCA 44BX
AB Stereo
42. Coincident pairing of two bidirectional mics that make a pattern of crossing Figure 8's.
Spaced Pairs
Blumlein Pairing
Microphone Care...
Fingerboard
43. 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.
Dynamic Mic Characteristics
Doubling Ribbon Length
Neumann U87
Shotgun
44. Early example of switchable polar patterns; Had both a dynamic and a ribbon capsule inside of it which when combined produced other polar patterns.
Hypercardioid/Supercardioid (Electrical Polar Pattern)
Model 3B Carbon Microphone
Altec/Western Electric 639
Crystal & Ceramic Microphones
45. Measurement similar to how our hearing works in frequency response charts.
A-Weighting
Alan Blumlein
Doubling Ribbon Length
Neumann U67
46. 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.
Vintage Tube Mic Precautions
Stereo
Dynamic Mic Characteristics
Sennheiser MD421
47. Tough & rugged microphone that contains an element consisting of a dome- shaped diaphragm and a moving 'voice coil'; Operates on principles of magnetic induction.
Microphone (Word Etymology)
Pickup
Decca Tree
Dynamic Microphone
48. French physicist who pioneered piezoelectricity.
Pierre Curie
Baffle
Shure KSM Series
Neumann U47
49. The graphic representation plot of the sensitivity of a microphone from any direction over a 360
Polar Pattern
Piezoelectric Effect
Increasing Output Voltage in Ribbon Mics
Shure KSM-353
50. 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
Headstock
AudioTechnica AT4040
Omnidirectional (Electrical Polar Pattern)
Leslie Cabinet