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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. A flat or roughly flat strip on the neck of a stringed instrument against which the strings are pressed to shorten the vibrating length and produce notes of higher pitches.
5 Common Microphone Transducers
3:1 Rule
Shure KSM Series
Fingerboard
2. 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.
Crystal and Ceramic Mic Use
Sennheiser e604
Vintage Tube Mic Precautions
Magnetic Induction Formula
3. Solid State and Tube.
Electret (Word Etymology)
Pad
Roswellite
Types of Pre-Amps for Condenser Mics
4. Coincident pairing that is at 90
Pressure Gradient Capsules
Capacitor Microphone
Phase Ports
Stereosonic
5. The first microphone sold by Shure; Military awarded Shure a contract to build microphones in WWII.
Model 3B Carbon Microphone
Electro Voice RE20
Pressure Gradient Capsules
Magnetic Induction Formula
6. The method by which microphones are classified.
Faraday's Law of Magnetic Induction
Clement Ader
Capacitance
Transducer Type
7. Utilized primarily on condenser and ribbon mics to isolate it from vibrations that might otherwise be transmitted to the microphone through the mic stand.
Shockmount
Matched Pairs
Wind Screens
3:1 Rule
8. An extremely strong acoustic nano- film designed to replace the foil ribbon in ribbon microphones.
Roswellite
Legs
Leslie Cabinet
AKG C12
9. + (only); (Front capsule alone)
Fundamental Frequency
MSM
Cardioid (Electrical Polar Pattern)
Percussion Mic Placement
10. 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.
Harvey Fletcher
AKG C1000S
Cardioid (Electrical Polar Pattern)
Frets
11. Condenser; Cardioid; End Address; 48V Required; Manufactured by AudioTechnica; Switchable 80 Hz Hi-Pass Filter; Ideal for professional recording and critical applications in broadcast.
X/Y
Alan Blumlein
AudioTechnica AT4051
Angle of Max Rejection
12. Older ribbon microphone weighing 8.5 lbs. nearly all of it the large magnet!
Parabolic Systems
RCA 44BX
Leslie Cabinet
SASS-P
13. The lowest - and usually most intense - frequency of a complex sound; Most often perceived as the sound's basic pitch.
Alan Blumlein
Matched Pairs
Fundamental Frequency
Polar Pattern
14. The tuning machines of a guitar; Part of the tuning key that strings are threaded through and twisted.
Mid/Side
Machine Head
Pressure Capsules
Near Coincident Pair
15. Causes an increase in low frequency response as one gets closer to the source.
Clutch
DIN
Proximity Effect
Tube Condenser Microphone
16. A 3- mic array using omni mics with left - right and center placement; Center is placed about 5 ft. closer to the source to eliminate 'holes' in the middle and the center levels are reduced for an even sound; Forms a triangle.
Cardioid (Electrical Polar Pattern)
3 Voltages for Phantom Power
Decca Tree
Sennheiser MD421
17. 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.
Shure SM81
Tuning Keys
Bandpass
OSHA Exposure Table
18. Divisions on the fingerboard which represent the position of a specific note or tone.
Frets
Georg Neumann
Counterbalance
Casing
19. Most sensitive to sounds arriving from the front while rejecting sounds from rear; Shaped like a heart; Rejects most signals from 180
Clement Ader
Noise
Reisz Marble Mic
Cardioid
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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183
21. Dynamic; Cardioid; End Address; Manufactured by Sennheiser; Very small and compact; Especially suitable for use with drums and brass instruments; Includes a clip to mount directly on drums.
Sennheiser e604
Shure Unidyne Series
Reverse Polarity
Diaphragm
22. Cable wrapping method that reduces interference and makes it easier to unravel the cable.
Blumlein Pairing
Piezoelectric Effect
Over/Under
3:1 Rule
23. 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.
Pierre Curie
Machine Head
Phasing
Speed of Sound Underwater
24. Characterized by a vacuum tube transducer; Heat rises so many are hung upside down to prevent heat from reaching the microphone head; Avoid jostling or shaking these fragile mics.
Transducer Type
Tube Condenser Microphone
Faraday Cage
Motor
25. 2 - 4 ft. from player; Placed below the line of sight of the bell - rotated at about 30 degrees off axis - and tilted upward.
Neumann KM 184
M/S Stereo
Trombone Mic Placement
Noise
26. Stereo coincident pairing where the middle mic (usually a cardiod) is facing source and a bidirectional side mic is placed at 90
Mid/Side
Coincident (Definition)
RCA 44BX
AKG C12
27. 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.
Boom Placement Rule
Electret Condenser
Ribbon Mic Characteristics
Transient Response
28. 4800 ft/sec
Legs
Speed of Sound Underwater
E.C. Wente
Bass Amp Mic Placement
29. Measurement of the mic's sensitivity; Measured in mV/Pa (millivolts per Pascal).
Sensitivity
Clement Ader
Angle of Max Rejection
Dual Mono
30. Changes in air pressure from the front or the back can cause polarity cancellation; Sides have good rejection; Natural polar pattern is bidirectional.
Magnetic Induction Voltage
Real Time Analyzer (RTA)
Pressure Gradient Capsules
Noise
31. 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...
Electret (Word Etymology)
SPL Meter
Phasing
32. Carbon; Ceramic/Crystal; Magnetic/Dynamic; Ribbon; Condenser
Telefunken ELA- M251
Capacitor
RFI
5 Common Microphone Transducers
33. Sounds that arrive from angles other than the 0
5 Common Microphone Transducers
Off-Axis
Shure SM57
AKG DYN60
34. Radio Frequency Interference
RFI
Spaced Pairs
Max SPL
Blumlein Pairing
35. Dynamic; Super-Cardioid; End Address; Humbucking Coil; Brilliance Switch; Manufactured by Sennheiser; Acknowledged as the most accurate and versatile dynamic mic available.
A-Weighting
End Address
Bandpass
Sennheiser MD441
36. Polar pattern produced when you add a little bit of bidirectional to the omni pattern.
FFT Analyzer
Subcardioid
Decca Tree
Neumann U67
37. To oppose with equal weight or force as in the length of the boom arm versus the weight of the microphone.
End Address
Condenser Diaphragm
Counterbalance
Magnetic Induction Voltage
38. Responds to air pressure variations outside of the capsule; Not selective of direction; Natural polar pattern is omnidirectional.
Crystal and Ceramic Mic Use
Pressure Capsules
A-Weighting
Spherical Mic
39. Microphone consisting of two parallel metal plates - each holding an opposing charge (+ or -) and thus creating a capacitor to induce an electrical charge as sound waves move the diaphragm; Require a solid- state or tube preamplifier.
Frets
Shure SM58
Crystal Mic Damage
Condenser Microphone
40. 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
Magnetic Microphone
Phase Ports
5 Common Microphone Transducers
41. DC Voltage Req'd for capsule polarizing voltage and internal mic preamps; 3 sources: External Power Supply Unit (PSU); Phantom Power; Battery.
Ribbon Mic Characteristics
Powering Condenser Microphones
Capacitor
Field Mixer
42. Often look like handheld vocal mics; Talk or sing into the end of the microphone.
Fukada Tree
Telefunken ELA- M251
Off-Axis
End Address
43. Very robust and durable; Used in telephones until 1990's; Currently finds applications for military use.
FFT Analyzer
Decca Tree
Fundamental Frequency
Carbon Microphone Uses
44. Shows the total range of the mic's internal pre- amp; Measured in dB (decibels).
OSHA Exposure Table
Dynamic Range
Highpass Filter
Arrays
45. Used for stereo miking to ensure correct balance and imaging.
NOS
Matched Pairs
Neumann KM 184
Pistonphone
46. 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.
Trumpet Mic Placement
Mid/Side
Boom Placement Rule
Clement Ader
47. Developed the condenser microphone in 1916 at Bell Labs.
AKG D36
Legs
E.C. Wente
Shure SM57
48. When using two microphones reverse the polarity of the bottom mic.
Faraday Cage
Capacitance
Backplate
Snare Drum Mic Placement
49. 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.
Arrays
Terry Bozzio
End Address
Packing
50. Pure polar pattern that receives sound from both the front and back; Also known as a 'Figure 8' pattern; More proximity effect that Cardioid or Hyper Cardioid; Often found in ribbon mics.
Distance Factor
Bidirectional
NOS
SASS-P