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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. Three or more microphones working together to capture a stereo or surround image of the sound source.
Vintage Tube Mic Precautions
Arrays
Rear Sensitivity (Relative to Front)
Goals of Sound Effects
2. Quartz; Barium Titaniate - Tourmaline; Rochelle Salt - and even cane sugar.
Examples of Piezoelectric Material
Sennheiser MD441
M/S Stereo
Altec/Western Electric 639
3. The combination of the ribbon and magnet in a ribbon microphone.
Motor
Pascals (Pa)
Leslie Cabinet
AB Stereo
4. Commonly found in acoustic guitar pickups; Ceramic piezoelectric material is used in hydrophones (underwater mics) because of durability.
Crystal and Ceramic Mic Use
Distance Factor (DSF)
Leslie Cabinet
Ribbon Microphone
5. 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.
Phasing
Real Time Analyzer (RTA)
Spherical Mic
Omnidirectional (Electrical Polar Pattern)
6. 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.
Types of Field Recording
Proximity Effect
Increasing Output Voltage in Ribbon Mics
Real Time Analyzer (RTA)
7. 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
Side Address
Faraday's Law of Magnetic Induction
Interference Tube...
Legs
8. 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.
3 Voltages for Phantom Power
Neumann U87
Field Mixer
Coverage Angle
9. Used to make sure you have accurate angles & capsule spacing when miking in stereo.
Neumann U67
Protractor & Ruler
Coverage Angle
Piezoelectric Effect
10. Mounts on a single stand to provide for adjustable spacing and angling between mics.
Stereo Bar
Types of Pre-Amps for Condenser Mics
Interference Tube...
AudioTechnica AT4051
11. 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.
On -Axis
Types of Pre-Amps for Condenser Mics
Theatrophone
Condenser Diaphragm
12. 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.
Bidirectional
Sennheiser MD421
Wind Screens
Carbon Microphone Uses
13. Cable wrapping method that keeps every coil on top of the next; May cause interference and tiny curls or tangles.
Over/Over
Spherical Mic
Supercardioid
AudioTechnica AT2020
14. When miking an amp placing it near the center of this will make it sound brighter; Miking near the outer edge of this will make it sound darker and more mellow in tone.
Telefunken ELA- M251
Alan Blumlein
Field Mixer
Cone
15. 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.
Hypercardioid
Vintage Tube Mic Precautions
5 Common Microphone Transducers
Subkick
16. The reduction in the amplitude of a wave due to the dissipation of wave energy.
Harvey Fletcher
Damping
Capacitance
Shotgun
17. + (only); (Front capsule alone)
Real Time Analyzer (RTA)
Shiny Box 46MXL
Cardioid (Electrical Polar Pattern)
Near Coincident Pair
18. Sounds that arrive at the 0
Snare Drum Mic Placement
SASS-P
Roll-Off
On -Axis
19. Used for stereo miking to ensure correct balance and imaging.
FFT Analyzer
Max SPL
Shure SM57
Matched Pairs
20. 4800 ft/sec
Magnetic Induction Voltage
Stereosonic
Speed of Sound Underwater
A-Weighting
21. The arm of the mic stand; Includes the angle adjust & telescopic adjust.
Boom
Trumpet Mic Placement
Condenser Diaphragm
Pierre Curie
22. - Omnidirectional: 100% - Cardioid: 33% - Supercardioid: 27% - Hypercardioid: 25% - Bidirectional: 33%
Null Angle
Ambient Sound Sensitivity
Hypercardioid/Supercardioid (Electrical Polar Pattern)
Tube Condenser Microphone
23. 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
Field Mixer
Sealed Ni-Cad Battery
Georg Neumann
24. Using omnidirectional as a reference of 1 - this is a measurement of how much farther you can be from a mic to achieve equal output level in other polar pattern microphones.
NOS
Distance Factor
Faraday's Law of Magnetic Induction
Faraday Cage
25. Allow sound to reach the rear of the capsule/diaphragm - to create cardioid - supercardioid - and hypercardioid patterns In single capsule pressure gradient microphones.
Interference Tube...
Fukada Tree
Phase Ports
Pressure Gradient Capsules
26. Modern drummer who has created a large kit and innovated several ways of capturing the sound from his massive kit.
Packing
Terry Bozzio
Bandpass
AudioTechnica AT4051
27. Small coil of wire wrapped around the plastic or aluminum diaphragm of a dynamic microphone.
Clip
Polar Pattern
Electro Voice RE20
Voice Coil
28. Most sensitive to sounds arriving from the front while rejecting sounds from rear; Shaped like a heart; Rejects most signals from 180
Dynamic Range
Soundfield
Faulkner
Cardioid
29. Verify that the boom is placed over a microphone leg prior to use to provide added balance and stability.
Neumann U87
Boom Placement Rule
Sennheiser MD421
Bidirectional
30. One of the oldest mics; Diaphragm mounted on & compresses cup of tiny granules of carbon (100 microns big) that increase current flow when compressed by sound waves and vary electrical current; Also called Resistance Mics;
Carbon Microphone
Fundamental Frequency
Bidirectional
Spaced Pairs
31. The first microphone sold by Shure; Military awarded Shure a contract to build microphones in WWII.
Model 3B Carbon Microphone
Ribbon Microphone
AKG C414
DIN
32. 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.
Blumlein Pairing
Goals of Sound Effects
Trumpet Mic Placement
AKG C414
33. Pair of omni mic separated by a circular absorptive baffle.
Over/Under
Jecklin Disk
Legs
MSM
34. The outer covering of a microphone.
Casing
Packing
Vintage Tube Mic Precautions
Highpass Filter
35. Radio Frequency Interference
MSM
RFI
Null Angle
Phasing
36. Cable wrapping method that reduces interference and makes it easier to unravel the cable.
Over/Under
Neumann U67
Headstock
Pierre Curie
37. Small microphone attached to the bridge of a string bass or to an acoustic guitar to amplify its sound.
Kick Tunnel
Pickup
Shure KSM-353
Faulkner
38. Tube microphone capable of SPL's over 140dB.
Piezoelectric Effect
Neumann U67
Microphone Care...
Neumann KM-84
39. Shows the total range of the mic's internal pre- amp; Measured in dB (decibels).
Phase Ports
Cardioid
Dynamic Range
Percussion Mic Placement
40. Use coincident or near coincident pairings; Too many microphones will cause phasing issues.
Doubling Ribbon Length
A-Weighting
Percussion Mic Placement
Supercardioid
41. Tough & rugged microphone that contains an element consisting of a dome- shaped diaphragm and a moving 'voice coil'; Operates on principles of magnetic induction.
Magnetic Induction Formula
Kick Tunnel
Rode NT1A
Dynamic Microphone
42. 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.
AudioTechnica AT4040
On -Axis
Hypercardioid
Electret Condenser
43. An electrical device characterized by its capacity to store an electric charge;
Crystal & Ceramic Microphones
Capacitor
AKG DYN60
Shure KSM-353
44. Reduces the power of a signal used when the trim itself cannot prevent overload in the mic line level signal.
Tuning Keys
Pad
Electret Condenser
Real Time Analyzer (RTA)
45. Small Diaphragm Electret condensers; Extremely flat frequency response; Omnidirectional pattern.
Leslie Cabinet
Measurement Mics
Neumann U67
Damping
46. Device used to calibrate sound pressure measurement devices; Emits a single 1 kHz frequency over a sustained period of time.
Machine Head
Headstock
Pistonphone
AKG DYN60
47. Tough & rugged; Can work in extremely high SPL environments; Less responsive to transient frequencies b/c of diaphragm mass is heavier than sound waves.
Pressure Capsules
A-Weighting
Crystal & Ceramic Microphones
Dynamic Mic Characteristics
48. Responds to air pressure variations outside of the capsule; Not selective of direction; Natural polar pattern is omnidirectional.
Mid/Side
Max SPL
Striking
Pressure Capsules
49. Delicate and require extreme care; NO PHANTOM POWER; Becoming more popular than ever because of highly efficient magnets - lower manufacturing costs - and great fidelity.
Damping
3:1 Rule
Ribbon Mic Characteristics
Carbon Microphone Uses
50. 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.
Types of Pre-Amps for Condenser Mics
Transient Response
Pressure Gradient Capsules
AudioTechnica AT2020