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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. Omnidirectional: N/ - Cardioid: 180
Cardioid (Electrical Polar Pattern)
Real Time Analyzer (RTA)
Angle of Max Rejection
Rear Sensitivity (Relative to Front)
2. 4800 ft/sec
Over/Over
Neumann KM 184
Speed of Sound Underwater
RFI
3. The first AKG dynamic microphone.
AKG DYN60
Shure SM57
Crystal Mic Damage
Wind Screens
4. 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.
Microphone Care...
Clement Ader
Sennheiser e604
Dynamic Mic Characteristics
5. The graphic representation plot of the sensitivity of a microphone from any direction over a 360
Vintage Tube Mic Precautions
NOS
Polar Pattern
Carbon Microphone Uses
6. Causes an increase in low frequency response as one gets closer to the source.
Over/Under
Proximity Effect
5 Common Microphone Transducers
Noise
7. Solid State and Tube.
Legs
Types of Pre-Amps for Condenser Mics
AKG D12
Sennheiser MD441
8. Device or transducer used for converting sound waves or acoustical energy into electrical energy
Electret Condenser
Dynamic Mic Characteristics
Jecklin Disk
Microphone (Definition)
9. 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.
AudioTechnica AT2020
OSHA Exposure Table
Theatrophone
Neumann CMV3
10. Magnetic field opposite to that which presently exists; Do this on the bottom mic when miking a snare with two mics.
Reverse Polarity
LRFB
Crystal & Ceramic Microphones
Counterbalance
11. The attachment that holds a microphone in place on the mic stand; Comes in various shapes - sizes - and applications.
Clip
Headstock
Coincident Pair
Crystal and Ceramic Mic Use
12. Proportional to: Magnetic field strength; Length of the conductor; Velocity of conductor moving through the magnetic field.
Magnetic Induction Voltage
Pop Filter
Neumann U67
Spaced Pairs
13. 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.
Microphone (Definition)
Shotgun
RFI
Reverse Polarity
14. Mid-Section of the mic stand; Includes the clutch.
Over/Under
Body
Terry Bozzio
Altec/Western Electric 639
15. Condenser; Cardioid; Side Address; 48V Required; Manufactured by AudioTechnica; Ideal for project/home- studio applications; Low price; Remains the low cost performance standard in side- address condenser mics.
NOS
Types of Pre-Amps for Condenser Mics
AudioTechnica AT2020
Harvey Fletcher
16. The arm of the mic stand; Includes the angle adjust & telescopic adjust.
Guitar Amp Mic Placement
E.C. Wente
Tuning Keys
Boom
17. 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.
Neumann KM-84
Microphone (Word Etymology)
Piezoelectric Effect
Electret Condenser
18. Part of a mic stand that the mic stands on.
Types of Pre-Amps for Condenser Mics
Legs
Coverage Angle
AKG C414
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
Legs
Pascals (Pa)
Bidirectional
Interference Tube...
20. Shure's ribbon microphone that utilizes Roswellite to prevent ribbon damage.
Faulkner
Pressure Capsules
MSM
Shure KSM-353
21. Polar pattern produced when you add a little bit of bidirectional to the omni pattern.
Subcardioid
Crystal Mic Damage
C-Weighting
Fingerboard
22. Used to filter heating current in certain mics; Invented by Georg Neumann.
NOS
Hypercardioid/Supercardioid (Electrical Polar Pattern)
Side Address
Sealed Ni-Cad Battery
23. When using two microphones reverse the polarity of the bottom mic.
Snare Drum Mic Placement
Shockmount
Shure Unidyne Series
Stereo
24. Voltage applied to piezoelectric material will cause it to deform or change shape; NO PHANTOM POWER!
Crystal Mic Damage
AudioTechnica AT4051
Baffle
On -Axis
25. Changes in air pressure from the front or the back can cause polarity cancellation; Sides have good rejection; Natural polar pattern is bidirectional.
Shure Unidyne Series
Pressure Gradient Capsules
Ribbon Mic Characteristics
Neumann KM 184
26. Built by AKG for Telefunken and regarded as one of the best vintage condenser microphones ever.
Telefunken ELA- M251
Decca Tree
Capacitance
Vintage Tube Mic Precautions
27. Solid state version of the U67.
Types of Field Recording
Neumann U87
Dynamic Microphone
Bidirectional (Electrical Polar Pattern)
28. Commonly found in acoustic guitar pickups; Ceramic piezoelectric material is used in hydrophones (underwater mics) because of durability.
Crystal and Ceramic Mic Use
Altec/Western Electric 639
Voice Coil
Sennheiser MD441
29. 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
Coincident (Definition)
Interference Tube...
AKG C414
Types of Field Recording
30. Will yield a 6dB increase in output - but will cause a loss of high frequency response.
Cone
Doubling Ribbon Length
Mono
Condenser Diaphragm
31. Dynamic; Super-Cardioid; End Address; Humbucking Coil; Brilliance Switch; Manufactured by Sennheiser; Acknowledged as the most accurate and versatile dynamic mic available.
Backplate
Sennheiser MD441
Field Mixer
Pad
32. 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
Ribbon Microphone Sensitivity
Off-Axis
NOS
33. Carbon; Ceramic/Crystal; Magnetic/Dynamic; Ribbon; Condenser
5 Common Microphone Transducers
Casing
Altec/Western Electric 639
Neumann U47
34. Condenser; Multiple; Side Address; 48V Required; Manufactured by AKG; Dual Diaphragm; Nine selectable pickup patterns; Peak Hold LED; The reference microphone for almost all comparative microphone tests.
AKG C414
Pad
3:1 Rule
AudioTechnica AT2020
35. Tough & rugged; Can work in extremely high SPL environments; Less responsive to transient frequencies b/c of diaphragm mass is heavier than sound waves.
Hydrophone
Baffle
Dynamic Mic Characteristics
Striking
36. 2 - 4 ft. from player; Placed below the line of sight of the bell - rotated at about 30 degrees off axis - and tilted upward.
Trombone Mic Placement
A-Weighting
Altec/Western Electric 639
AKG C414
37. Bell Labs scientist that was an innovator of many spaced pair and arrayed miking techniques.
E.C. Wente
Spaced Pairs
Neumann KM 184
Harvey Fletcher
38. Used for stereo miking to ensure correct balance and imaging.
Pickup
Clement Ader
Matched Pairs
Coverage Angle
39. 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
5 Common Microphone Transducers
Lowpass Filter
Leslie Cabinet
Rode NT1A
40. Tough & rugged microphone that contains an element consisting of a dome- shaped diaphragm and a moving 'voice coil'; Operates on principles of magnetic induction.
Shiny Box 46MXL
Highpass Filter
Real Time Analyzer (RTA)
Dynamic Microphone
41. Captures sounds arriving 90
Hydrophone
Parabolic Systems
Headstock
AudioTechnica AT4040
42. 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.
Electro Voice RE20
Neumann CMV3
Shure SM57
Phasing
43. 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.
Cardioid (Electrical Polar Pattern)
Condenser Microphone
Parabolic Systems
Dynamic Range
44. 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.
Harvey Fletcher
Jecklin Disk
Decca Tree
Electret Condenser
45. Divisions on the fingerboard which represent the position of a specific note or tone.
Fundamental Frequency
Frets
Georg Neumann
Subcardioid
46. Increasing magnetic field strength is the only practical means of increasing output voltage; Conductor movement is limited due to tension of the ribbon; and ribbon length increases lead to a loss of high frequency response.
Microphone (Word Etymology)
Boom
Parabolic Systems
Increasing Output Voltage in Ribbon Mics
47. Adds two outer right and left rear facing mics to a Decca tree for surround sound depth.
Fukada Tree
Phasing
Parabolic Systems
Condenser Microphone
48. Developed the condenser microphone in 1916 at Bell Labs.
E.C. Wente
Bidirectional (Electrical Polar Pattern)
Shure SM58
Harvey Fletcher
49. To oppose with equal weight or force as in the length of the boom arm versus the weight of the microphone.
Highpass Filter
Subkick
Bass Amp Mic Placement
Counterbalance
50. Shows the total range of the mic's internal pre- amp; Measured in dB (decibels).
Dynamic Range
Spaced Pairs
Examples of Piezoelectric Material
Terry Bozzio