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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. Changes in air pressure from the front or the back can cause polarity cancellation; Sides have good rejection; Natural polar pattern is bidirectional.
Subcardioid (Electrical Polar Pattern)
Shotgun
Altec/Western Electric 639
Pressure Gradient Capsules
2. Mid-Section of the mic stand; Includes the clutch.
Side Address
Noise
Snare Drum Mic Placement
Body
3. Proportional to: Magnetic field strength; Length of the conductor; Velocity of conductor moving through the magnetic field.
Legs
Stereo Bar
Magnetic Induction Voltage
Capacitance
4. Shure's ribbon microphone that utilizes Roswellite to prevent ribbon damage.
Examples of Piezoelectric Material
SPL Meter
Ribbon Mic Characteristics
Shure KSM-353
5. Used to make sure you have accurate angles & capsule spacing when miking in stereo.
Microphone Storage
SASS-P
Parabolic Systems
Protractor & Ruler
6. Founded AKG at the end of WWII in Austria.
Pad
Stereo
X/Y
Rudolf Goerike & Ernest Pless
7. Commonly found in acoustic guitar pickups; Ceramic piezoelectric material is used in hydrophones (underwater mics) because of durability.
Neumann CMV3
Sennheiser MD441
Crystal and Ceramic Mic Use
Max SPL
8. Shure's newer ribbon studio mics; KSM 353 & 313 (Roswellite); KSM 44 - 32 - & 27.
Crystal Mic Damage
Real Time Analyzer (RTA)
Shure KSM Series
Neumann CMV3
9. 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
Distance Factor
Highpass Filter
AudioTechnica AT4040
10. Will yield a 6dB increase in output - but will cause a loss of high frequency response.
Doubling Ribbon Length
Telefunken ELA- M251
Ribbon Microphone Sensitivity
Soundfield
11. Filters only the bandwidth of frequencies that are supposed to (or allowed) to pass through; High and Low Pass are examples.
On -Axis
Bandpass
Phase Ports
Condenser Diaphragm
12. Used in adverse conditions to protect from elements like sand - or dust.
Wind Screens
Pressure Capsules
Stereo Bar
Supercardioid
13. Most sensitive to sounds arriving from the front while rejecting sounds from rear; Shaped like a heart; Rejects most signals from 180
Cardioid
Transducer Type
Snare Drum Mic Placement
On -Axis
14. Part of a mic stand that the mic stands on.
Bidirectional (Electrical Polar Pattern)
Distance Factor
Faraday Cage
Legs
15. 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
Noise
Lowpass Filter
Distance Factor
Magnetic Induction Formula
16. 12V DC; 24V DC; 48V DC
3 Voltages for Phantom Power
LRFB
Neumann U47
Bandpass
17. Dutch broadcasting stereo mic technique; An X-Y type with the mics 30cm apart and at a 90
NOS
DIN
Boom
Bidirectional
18. To capture two perspectives on the same sound.
Magnetic Microphone
Headstock
AB Stereo
Dual Mono
19. Voltage applied to piezoelectric material will cause it to deform or change shape; NO PHANTOM POWER!
Transducer Type
Crystal Mic Damage
Microphone (Word Etymology)
Cardioid
20. Coincident pairing that is at 90
Coincident (Definition)
Carbon Microphone Uses
Stereosonic
Crystal & Ceramic Microphones
21. 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.
Omnidirectional
Motor
Types of Field Recording
Kick Tunnel
22. When using multiple microphones - the distance between microphones should be at least 3 times the distance from each microphone to its intended sound source.
Protractor & Ruler
Bandpass
3:1 Rule
FFT Analyzer
23. 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.
Magnetic Induction Formula
Decca Tree
Protractor & Ruler
Spherical Mic
24. Configured to simulate the spacing and directivity of human hearing; Box shape with two 'ears' on each side.
Soundfield
SASS-P
Guitar Amp Mic Placement
Diaphragm
25. German broadcasting stereo mic technique; An X-Y type with the mics 20cm apart and at a 90
Alan Blumlein
Ribbon Microphone
Dynamic Range
DIN
26. First microphone invented by Georg Neumann
Sealed Ni-Cad Battery
Neumann KM 184
AKG C1000S
Reisz Marble Mic
27. 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.
Bidirectional
Rode NT1A
Shotgun
Diaphragm
28. Term coined by Sir Charles Wheatstone derived from the Greek words 'micro' (small) & 'phon' (sound).
Microphone (Word Etymology)
3 Voltages for Phantom Power
MSM
Fingerboard
29. 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.
Electret Condenser
Shure KSM Series
Soundfield
Omnidirectional
30. EMI employee that was the innovator of many coincident pairing mic techniques; Mid/Side & Blumlein techniques are associated with him.
Speed of Sound Underwater
Boom Placement Rule
Alan Blumlein
Blumlein Pairing
31. DC Voltage Req'd for capsule polarizing voltage and internal mic preamps; 3 sources: External Power Supply Unit (PSU); Phantom Power; Battery.
SASS-P
Powering Condenser Microphones
Magnetic Microphone
Piezoelectric Effect
32. Overall measurement close to the overall sound level in frequency response charts.
C-Weighting
AudioTechnica AT4051
Capacitor
Boom
33. Tough & rugged; Can work in extremely high SPL environments; Less responsive to transient frequencies b/c of diaphragm mass is heavier than sound waves.
Pierre Curie
Lowpass Filter
Dynamic Mic Characteristics
Sealed Ni-Cad Battery
34. Keep in proper case; Never disassemble shockmounts
Legs
Cardioid
Noise
Microphone Storage
35. 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.
Trumpet Mic Placement
Pop Filter
Model 3B Carbon Microphone
Kick Tunnel
36. Used for stereo miking to ensure correct balance and imaging.
RCA 44BX
OSHA Exposure Table
Matched Pairs
Over/Over
37. 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
Rudolf Goerike & Ernest Pless
AKG C12
Interference Tube...
38. Responds to air pressure variations outside of the capsule; Not selective of direction; Natural polar pattern is omnidirectional.
M/S Stereo
Pressure Capsules
Spaced Pairs
Phase Ports
39. Three or more microphones working together to capture a stereo or surround image of the sound source.
Max SPL
Alan Blumlein
Arrays
Condenser Diaphragm
40. Pair of omni mic separated by a circular absorptive baffle.
AKG C414
Jecklin Disk
3:1 Rule
Faraday's Law of Magnetic Induction
41. Older ribbon microphone weighing 8.5 lbs. nearly all of it the large magnet!
Real Time Analyzer (RTA)
Faraday's Law of Magnetic Induction
Sennheiser MD441
RCA 44BX
42. 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
Capacitor Microphone
Speed of Sound Underwater
Pressure Capsules
43. Mics in which sound waves vibrate a piezoelectric crystal that generates a varying voltage.
Fukada Tree
Clip
Crystal & Ceramic Microphones
X/Y
44. Occupying the same space and time.
Clutch
Roll-Off
Sealed Ni-Cad Battery
Coincident (Definition)
45. Stereo coincident pairing where the middle mic (usually a cardiod) is facing source and a bidirectional side mic is placed at 90
Shiny Box 46MXL
AudioTechnica AT2020
Mid/Side
Stereosonic
46. Used to filter heating current in certain mics; Invented by Georg Neumann.
Electro Voice RE20
DIN
3:1 Rule
Sealed Ni-Cad Battery
47. 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.
Polar Pattern
Capacitance
Transient Response
Max SPL
48. The tuning machines of a guitar; Part of the tuning key that strings are threaded through and twisted.
Clutch
X/Y
Machine Head
End Address
49. Tube manufactured for the new version of the AKG C12 (called the C12-A); Powered by Norelco.
Nuvistor Tube
Percussion Mic Placement
Types of Field Recording
LRFB
50. Dynamic; Cardioid; End Address; Manufactured by Shure; Popular musicians' choice due to its sturdy construction and ability to work well with instruments that produce high sound pressure levels.
Shure SM57
AKG C12
SASS-P
Noise