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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 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.
Georg Neumann
Rode NT1A
Pop Filter
Decca Tree
2. Shure's newer ribbon studio mics; KSM 353 & 313 (Roswellite); KSM 44 - 32 - & 27.
SPL Meter
Shure KSM Series
Spaced Pairs
Microphone Care...
3. Dutch broadcasting stereo mic technique; An X-Y type with the mics 30cm apart and at a 90
NOS
Blumlein Pairing
Angle of Max Rejection
FFT Analyzer
4. Filters only the bandwidth of frequencies that are supposed to (or allowed) to pass through; High and Low Pass are examples.
Bandpass
Backplate
Fingerboard
Faraday's Law of Magnetic Induction
5. Condenser; Cardioid; End Address; Manufactured by Shure; Small condenser design that is great for instrument recording.
Dual Mono
Clip
Shure SM81
3:1 Rule
6. Built by AKG for Telefunken and regarded as one of the best vintage condenser microphones ever.
Voice Coil
Telefunken ELA- M251
Reverse Polarity
Max SPL
7. Older ribbon microphone weighing 8.5 lbs. nearly all of it the large magnet!
Condenser Microphone
Types of Field Recording
RCA 44BX
Soundfield
8. Allow sound to reach the rear of the capsule/diaphragm - to create cardioid - supercardioid - and hypercardioid patterns In single capsule pressure gradient microphones.
Snare Drum Mic Placement
On -Axis
Stereosonic
Phase Ports
9. 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.
Dynamic Microphone
Roswellite
Supercardioid
SPL Meter
10. Used to filter heating current in certain mics; Invented by Georg Neumann.
Increasing Output Voltage in Ribbon Mics
Sealed Ni-Cad Battery
Condenser Microphone
Soundfield
11. 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.
X/Y
Real Time Analyzer (RTA)
Neumann KM 184
Shotgun
12. Polar pattern produced when you add a little bit of bidirectional to the omni pattern.
Subcardioid (Electrical Polar Pattern)
Subcardioid
Bass Amp Mic Placement
Shure SM58
13. Keep in proper case; Never disassemble shockmounts
Electret (Word Etymology)
Machine Head
Microphone Storage
Dynamic Microphone
14. Condenser; Cardioid; End Address; 48V Required; Manufactured by AudioTechnica; Switchable 80 Hz Hi-Pass Filter; Ideal for professional recording and critical applications in broadcast.
AudioTechnica AT4051
Binaural Mic
Sennheiser e604
Mid/Side
15. 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.
Neumann U47
Condenser Microphone
Neumann U67
Ribbon Microphone Sensitivity
16. Used for stereo miking to ensure correct balance and imaging.
Matched Pairs
Shure KSM Series
Neumann CMV3
Speed of Sound Underwater
17. Raises the body of the microphone increasing height.
Clutch
C-Weighting
AB Stereo
FFT Analyzer
18. Coincident stereo miking techniques that has two microphone diaphragms occupying (as near as possible) the same space; Capsules often on top of each other; Not good for noisy locations.
Coincident Pair
Rode NT1A
Snare Drum Mic Placement
AKG C1000S
19. 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
Damping
Capacitor
Max SPL
Pascals (Pa)
20. Shows the max sound pressure level possible with a certain amount of distortion; Measured in dB (decibels).
Trumpet Mic Placement
Sennheiser MD421
Max SPL
Over/Under
21. Dynamic; Super-Cardioid; End Address; Humbucking Coil; Brilliance Switch; Manufactured by Sennheiser; Acknowledged as the most accurate and versatile dynamic mic available.
Crystal Mic Damage
Distance Factor (DSF)
Bandpass
Sennheiser MD441
22. Sounds that arrive from angles other than the 0
Off-Axis
Trombone Mic Placement
Striking
End Address
23. The moving plate of a condenser capacitor; Constructed of a thin piece of metal or thin plastic - such as Mylar - coated with gold or nickel; .05 - 10 microns thick.
Pressure Capsules
Microphone (Definition)
Condenser Diaphragm
Shure SM58
24. Small coil of wire wrapped around the plastic or aluminum diaphragm of a dynamic microphone.
Sennheiser e604
Theatrophone
Voice Coil
NOS
25. 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.
Powering Condenser Microphones
Baffle
SASS-P
Microphone Care...
26. Used in production sound for multiple perspectives on the set; Used in Audio Post to record a number of mics into a recorder with minimal set- up & tear down.
Coincident Pair
Field Mixer
Pressure Gradient Capsules
Packing
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
Condenser Diaphragm
Coincident (Definition)
Mid/Side
28. The outer covering of a microphone.
Fundamental Frequency
Casing
Increasing Output Voltage in Ribbon Mics
Speed of Sound Underwater
29. 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.
Magnetic Induction Formula
Counterbalance
Shure Unidyne Series
Sennheiser e604
30. Electro- acoustic device attached to a transducer that vibrates to receive or produce sound waves which put the device into motion.
Faraday Cage
Diaphragm
Shure KSM Series
Binaural Mic
31. Determined by: Ribbon Thickness (about 3 to 6 microns); Corrugations/Inch; Tension of the Ribbon.
Ribbon Microphone Sensitivity
Condenser Microphone
5 Common Microphone Transducers
Sennheiser e604
32. Very robust and durable; Used in telephones until 1990's; Currently finds applications for military use.
Phase Ports
Carbon Microphone Uses
SPL Meter
Coincident Pair
33. Shure's ribbon microphone that utilizes Roswellite to prevent ribbon damage.
Proximity Effect
Carbon Microphone
Shure KSM-353
Sennheiser e604
34. + & - (Front & rear in opposite equal amounts)
Powering Condenser Microphones
Trumpet Mic Placement
Bidirectional (Electrical Polar Pattern)
RFI
35. The tuning machines of a guitar; Part of the tuning key that strings are threaded through and twisted.
Machine Head
Mono
Faraday's Law of Magnetic Induction
3:1 Rule
36. 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;
AKG C12
M/S Stereo
Transient Response
Motor
37. Sensitive in a narrower pattern in the front than a cardioid and has a prominent/pronounced lobe at rear; Rejects most signals from 110
Hypercardioid
Soundfield
3 Voltages for Phantom Power
Highpass Filter
38. Used by government agencies to determine safe sound exposure levels (in dB) over a period of time; 85 - 90 dB = 16 hrs. of safe exposure time at 85 dB; Decreases to 8 hrs. of safe exposure time at 90 dB.
5 Common Microphone Transducers
Piezoelectric Effect
OSHA Exposure Table
Capacitor
39. Use coincident or near coincident pairings; Too many microphones will cause phasing issues.
Percussion Mic Placement
Rear Sensitivity (Relative to Front)
Supercardioid
Terry Bozzio
40. The first dynamic microphone with changeable polar patterns.
Lowpass Filter
Arrays
AKG D36
Diaphragm
41. 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.
Capacitance
Fundamental Frequency
Bass Amp Mic Placement
Backplate
42. German broadcasting stereo mic technique; An X-Y type with the mics 20cm apart and at a 90
Supercardioid
OSHA Exposure Table
Harvey Fletcher
DIN
43. Dynamic; Cardioid; End Address; Manufactured by Electro Voice; Large Diaphragm; Humbucking Coil; Bass Roll Off Switch; Minimizes proximity effect; Ideal for broadcasting and sound engineering techniques.
Baffle
Spherical Mic
Proximity Effect
Electro Voice RE20
44. 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
Carbon Microphone
Interference Tube...
Distance Factor
Subcardioid
45. Big + & + (More front with less positive rear)
A-Weighting
Capacitor Microphone
Subcardioid (Electrical Polar Pattern)
Neumann U67
46. Responds to air pressure variations outside of the capsule; Not selective of direction; Natural polar pattern is omnidirectional.
Pressure Capsules
Reverse Polarity
Neumann KM-84
Sennheiser MD421
47. Consumers can listen to live broadcasts over telephone lines; Individual one- way experience that required a subscription service to listen to performances.
Theatrophone
MSM
Off-Axis
Dual Mono
48. 2 - 4 ft. from player; Placed below the line of sight of the bell - rotated at about 30 degrees off axis - and tilted upward.
Transducer Type
Fingerboard
End Address
Trombone Mic Placement
49. Derived from two words; 'electr' from electrostatic and 'et' from magnet.
Field Mixer
Polar Pattern
SASS-P
Electret (Word Etymology)
50. Close mic placement can help guard again bleed from other instruments and takes advantage of proximity effect; Center of cone = Brighter; Outside of cone = Darker; Reflections can create phase issues (can be reduced by putting the cabinet at an angle
Guitar Amp Mic Placement
Cardioid (Electrical Polar Pattern)
Bidirectional (Electrical Polar Pattern)
Binaural Mic