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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. Determined by: Ribbon Thickness (about 3 to 6 microns); Corrugations/Inch; Tension of the Ribbon.
Ribbon Microphone Sensitivity
Motor
AKG D12
Tube Condenser Microphone
2. 12V DC; 24V DC; 48V DC
Over/Under
Null Angle
ORTF
3 Voltages for Phantom Power
3. 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.
Neumann U87
Binaural Mic
E.C. Wente
Phasing
4. 4 coincident mics each positioned at 90
Pad
Dual Mono
Polar Pattern
LRFB
5. Verify that the boom is placed over a microphone leg prior to use to provide added balance and stability.
Boom Placement Rule
Clip
Subcardioid (Electrical Polar Pattern)
Telefunken ELA- M251
6. Commonly found in acoustic guitar pickups; Ceramic piezoelectric material is used in hydrophones (underwater mics) because of durability.
Hypercardioid/Supercardioid (Electrical Polar Pattern)
Crystal and Ceramic Mic Use
Field Mixer
Interference Tube...
7. Used in adverse conditions to protect from elements like sand - or dust.
DIN
Microphone Storage
Wind Screens
Terry Bozzio
8. First microphone invented by Georg Neumann
Over/Over
Reisz Marble Mic
Trombone Mic Placement
M/S Stereo
9. An electrical device characterized by its capacity to store an electric charge;
Field Mixer
Capacitor
Magnetic Induction Voltage
AudioTechnica AT2020
10. Occupying the same space and time.
SASS-P
Shiny Box 46MXL
Coincident (Definition)
Real Time Analyzer (RTA)
11. 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
Magnetic Induction Formula
Pop Filter
Over/Under
Kick Tunnel
12. The lowest - and usually most intense - frequency of a complex sound; Most often perceived as the sound's basic pitch.
Piezoelectric Effect
Alan Blumlein
Fundamental Frequency
Ribbon Microphone Sensitivity
13. Sensitive in a narrower pattern in the front than a cardioid and has a prominent/pronounced lobe at rear; Rejects most signals from 110
Examples of Piezoelectric Material
Neumann CMV3
Hypercardioid
AB Stereo
14. Allow sound to reach the rear of the capsule/diaphragm - to create cardioid - supercardioid - and hypercardioid patterns In single capsule pressure gradient microphones.
M/S Stereo
Piezoelectric Effect
Phase Ports
Dynamic Microphone
15. 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.
Carbon Microphone Uses
Over/Under
Coincident Pair
AKG C414
16. Changes in air pressure from the front or the back can cause polarity cancellation; Sides have good rejection; Natural polar pattern is bidirectional.
Bass Amp Mic Placement
Pressure Gradient Capsules
Shiny Box 46MXL
Carbon Microphone Uses
17. Electro- acoustic device attached to a transducer that vibrates to receive or produce sound waves which put the device into motion.
Proximity Effect
Shotgun
Over/Over
Diaphragm
18. An instrument for detecting sound transmitted through water commonly manufactured using ceramic piezoelectric material.
Omnidirectional
Telefunken ELA- M251
Hydrophone
Side Address
19. The attachment that holds a microphone in place on the mic stand; Comes in various shapes - sizes - and applications.
Polar Pattern
Ribbon Mic Characteristics
Clip
ORTF
20. 4800 ft/sec
Bidirectional
Speed of Sound Underwater
AKG C1000S
Reverse Polarity
21. 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.
RFI
Magnetic Microphone
Headstock
Sennheiser e604
22. Known as 'The Bottle' this was the first mass - produced condenser mic.
Clement Ader
AudioTechnica AT4051
Machine Head
Neumann CMV3
23. Basket/grille made out of a specific type of copper wire to block protect the mic from physical damage and to protect the mic from stray RFI
Reverse Polarity
Faraday Cage
Electret (Word Etymology)
Neumann U67
24. The outer covering of a microphone.
Shiny Box 46MXL
Pickup
Shockmount
Casing
25. Reduces the power of a signal used when the trim itself cannot prevent overload in the mic line level signal.
Machine Head
Pop Filter
Pad
Roll-Off
26. Early example of switchable polar patterns; Had both a dynamic and a ribbon capsule inside of it which when combined produced other polar patterns.
Shure SM81
Transducer Type
Altec/Western Electric 639
Electret Condenser
27. Shure's ribbon microphone that utilizes Roswellite to prevent ribbon damage.
Shure KSM-353
M/S Stereo
Condenser Diaphragm
Pickup
28. The measure of how quickly a mic's diaphragm will react when it is hit by an acoustic sound wave.
Arrays
Transient Response
Microphone (Definition)
Stereosonic
29. Dynamic; Cardioid; End Address; Manufactured by Shure; Considered the industry standard for live vocal performance microphones; One of the best- selling microphones in the world.
Speed of Sound Underwater
Shure SM58
Shure KSM-353
Angle of Max Rejection
30. Mics placed in front of an instrument or ensemble (in a left/right fashion) to obtain an overall stereo image; Sound more open and natural; Weaker center image than X/Y; Great for creating background sounds that will blend in with foreground sounds.
Reisz Marble Mic
Field Mixer
Spaced Pairs
Proximity Effect
31. Microphone with 4 large diaphragm condenser capsules; 3 bidirectional and 1 omni; Can be combined to make any polar pattern.
Carbon Microphone Uses
Soundfield
Tuning Keys
Kick Tunnel
32. French broadcasting stereo mic technique; An X-Y type with the mics 17cm apart and at a 110
Jecklin Disk
Off-Axis
ORTF
Omnidirectional (Electrical Polar Pattern)
33. Mics in which sound waves vibrate a piezoelectric crystal that generates a varying voltage.
Neumann U87
Near Coincident Pair
Types of Pre-Amps for Condenser Mics
Crystal & Ceramic Microphones
34. Condenser; Cardioid; Side Address; 48V Required; Large Diaphragm; Manufactured by AudioTechnica; Transformerless circuitry virtually eliminates low- frequency distortion.
Decca Tree
AudioTechnica AT4040
Shure SM58
RFI
35. - Omnidirectional: 100% - Cardioid: 33% - Supercardioid: 27% - Hypercardioid: 25% - Bidirectional: 33%
Polar Pattern
Ambient Sound Sensitivity
Model 3B Carbon Microphone
Condenser Microphone
36. Angle of maximum signal rejection in a microphone polar pattern.
A-Weighting
Null Angle
Dual Mono
Neumann U87
37. Very robust and durable; Used in telephones until 1990's; Currently finds applications for military use.
OSHA Exposure Table
Carbon Microphone Uses
Omnidirectional (Electrical Polar Pattern)
Measurement Mics
38. Will yield a 6dB increase in output - but will cause a loss of high frequency response.
Doubling Ribbon Length
Frets
Capacitor Microphone
3 Voltages for Phantom Power
39. Fixed plate that is charged with polarized voltage found in condenser mics; Usually constructed of milled brass; Has a number of holes drilled in it to provide damping for diaphragm.
Backplate
Boom Placement Rule
AudioTechnica AT4051
Pad
40. The head or top of the guitar where the tuning pegs are located.
Legs
Headstock
Over/Over
Wind Screens
41. 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.
Clutch
Field Mixer
Sennheiser MD441
AKG D12
42. Omnidirectional: 360
Striking
Leslie Cabinet
Coverage Angle
Supercardioid
43. The property of certain crystals that causes them to produce voltage when a mechanical pressure such as sound vibrations is applied to them; Originates from Greek word 'piezein' (to compress).
AKG C1000S
Piezoelectric Effect
SASS-P
Neumann U47
44. Magnetic field opposite to that which presently exists; Do this on the bottom mic when miking a snare with two mics.
Electret Condenser
Microphone Storage
Motor
Reverse Polarity
45. Founded AKG at the end of WWII in Austria.
5 Common Microphone Transducers
Polar Pattern
Phase Ports
Rudolf Goerike & Ernest Pless
46. 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.
Packing
Proximity Effect
Angle of Max Rejection
Measurement Mics
47. When using multiple microphones - the distance between microphones should be at least 3 times the distance from each microphone to its intended sound source.
Sennheiser e604
Magnetic Induction Formula
3:1 Rule
Baffle
48. Term coined by Sir Charles Wheatstone derived from the Greek words 'micro' (small) & 'phon' (sound).
Body
A-Weighting
Microphone (Word Etymology)
Microphone Care...
49. The arm of the mic stand; Includes the angle adjust & telescopic adjust.
C-Weighting
Coverage Angle
Pierre Curie
Boom
50. The graphic representation plot of the sensitivity of a microphone from any direction over a 360
Binaural Mic
Motor
Baffle
Polar Pattern