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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. 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.
ORTF
Powering Condenser Microphones
Backplate
Electret Condenser
2. 4 to 6 ft. from the player; Mic should be placed below the line of sight of the bell - rotated at about 40 degrees off- axis - and tilted upward.
Supercardioid
Mid/Side
Trumpet Mic Placement
Model 3B Carbon Microphone
3. The reduction in the amplitude of a wave due to the dissipation of wave energy.
Diaphragm
Reisz Marble Mic
Tuning Keys
Damping
4. Divisions on the fingerboard which represent the position of a specific note or tone.
Clip
Clutch
Frets
Neumann CMV3
5. Will yield a 6dB increase in output - but will cause a loss of high frequency response.
Ambient Sound Sensitivity
Magnetic Induction Voltage
Side Address
Doubling Ribbon Length
6. The measure of how quickly a mic's diaphragm will react when it is hit by an acoustic sound wave.
Spaced Pairs
Transient Response
Sennheiser e604
Matched Pairs
7. Moving a conductor (a coil of wire) through a magnetic field will cause a voltage to be induced across the conductor.
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8. The first cardioid pattern dynamic microphone.
Stereosonic
Legs
Shure Unidyne Series
AKG D12
9. 12V DC; 24V DC; 48V DC
Pressure Capsules
3 Voltages for Phantom Power
Snare Drum Mic Placement
Electro Voice RE20
10. Use coincident or near coincident pairings; Too many microphones will cause phasing issues.
Percussion Mic Placement
Dynamic Microphone
Transient Response
Faraday Cage
11. When using multiple microphones - the distance between microphones should be at least 3 times the distance from each microphone to its intended sound source.
Electro Voice RE20
Stereosonic
Fingerboard
3:1 Rule
12. 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
Null Angle
Telefunken ELA- M251
Hypercardioid
Leslie Cabinet
13. 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.
Angle of Max Rejection
AKG D36
AKG C414
Pascals (Pa)
14. The first phantom powered condenser microphone designed for use by Georg Neumann for Norwegian State Television.
Theatrophone
Neumann KM-84
Leslie Cabinet
Condenser Diaphragm
15. Tough & rugged; Can work in extremely high SPL environments; Less responsive to transient frequencies b/c of diaphragm mass is heavier than sound waves.
Roll-Off
Dynamic Mic Characteristics
Blumlein Pairing
3:1 Rule
16. An instrument for detecting sound transmitted through water commonly manufactured using ceramic piezoelectric material.
Pressure Capsules
Hydrophone
Neumann U87
Pad
17. 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
Pascals (Pa)
3:1 Rule
Rudolf Goerike & Ernest Pless
Increasing Output Voltage in Ribbon Mics
18. Tough & rugged microphone that contains an element consisting of a dome- shaped diaphragm and a moving 'voice coil'; Operates on principles of magnetic induction.
Side Address
Mid/Side
Omnidirectional (Electrical Polar Pattern)
Dynamic Microphone
19. Three or more microphones working together to capture a stereo or surround image of the sound source.
Carbon Microphone
Arrays
AKG D36
LRFB
20. First microphone invented by Georg Neumann
Vintage Tube Mic Precautions
Terry Bozzio
Fingerboard
Reisz Marble Mic
21. Sensitive in a narrower pattern in the front than a cardioid and has a prominent/pronounced lobe at rear; Rejects most signals from 110
Proximity Effect
Hypercardioid
Phasing
Subcardioid (Electrical Polar Pattern)
22. Bell Labs scientist that was an innovator of many spaced pair and arrayed miking techniques.
Snare Drum Mic Placement
Phase Ports
Harvey Fletcher
Matched Pairs
23. EMI employee that was the innovator of many coincident pairing mic techniques; Mid/Side & Blumlein techniques are associated with him.
Off-Axis
Noise
Angle of Max Rejection
Alan Blumlein
24. Changes in air pressure from the front or the back can cause polarity cancellation; Sides have good rejection; Natural polar pattern is bidirectional.
Pressure Gradient Capsules
Off-Axis
Leslie Cabinet
AKG C1000S
25. 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.
Sennheiser MD421
Dynamic Microphone
Electro Voice RE20
Pop Filter
26. 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.
Pad
Phasing
Cardioid (Electrical Polar Pattern)
SPL Meter
27. Device used to calibrate sound pressure measurement devices; Emits a single 1 kHz frequency over a sustained period of time.
Theatrophone
Shure SM57
Neumann CMV3
Pistonphone
28. 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.
Condenser Microphone
Binaural Mic
Stereo Bar
Terry Bozzio
29. Small Diaphragm Electret condensers; Extremely flat frequency response; Omnidirectional pattern.
Neumann KM-84
Measurement Mics
Polar Pattern
Casing
30. - Omnidirectional: 1 - Cardioid: 1.7 - Supercardioid: 1.9 - Hypercardioid: 2 - Bidirectional: 1.7
Distance Factor (DSF)
Subcardioid (Electrical Polar Pattern)
Clutch
Near Coincident Pair
31. 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
Dynamic Mic Characteristics
Rode NT1A
Vintage Tube Mic Precautions
32. Consumers can listen to live broadcasts over telephone lines; Individual one- way experience that required a subscription service to listen to performances.
Pad
AKG C414
Pop Filter
Theatrophone
33. Omnidirectional: N/ - Cardioid: 180
AKG D36
SPL Meter
Rudolf Goerike & Ernest Pless
Angle of Max Rejection
34. Shows the level of self- noise from a microphone's internal electronics; Measured in dB (decibels).
Backplate
Piezoelectric Effect
Over/Under
Noise
35. Delicate and require extreme care; NO PHANTOM POWER; Becoming more popular than ever because of highly efficient magnets - lower manufacturing costs - and great fidelity.
Boom
Mono
Magnetic Induction Formula
Ribbon Mic Characteristics
36. Cable wrapping method that keeps every coil on top of the next; May cause interference and tiny curls or tangles.
On -Axis
Snare Drum Mic Placement
Over/Over
Hydrophone
37. The graphic representation plot of the sensitivity of a microphone from any direction over a 360
Boom Placement Rule
Pressure Gradient Capsules
Rudolf Goerike & Ernest Pless
Polar Pattern
38. Forward facing bipolar mics spaced 20cm apart.
Faulkner
Carbon Microphone
5 Common Microphone Transducers
Shure KSM-353
39. Digital device used to Fourier Forms; Used to measure the specific number of sine waves in a specific frequency in a specific setting.
Condenser Diaphragm
Mono
Powering Condenser Microphones
FFT Analyzer
40. When using two microphones reverse the polarity of the bottom mic.
Snare Drum Mic Placement
Powering Condenser Microphones
Reisz Marble Mic
3:1 Rule
41. Tube microphone capable of SPL's over 140dB.
Rudolf Goerike & Ernest Pless
Neumann U67
Subcardioid
Headstock
42. One of the world's greatest condenser microphones prized for the CK12 capsule.
AKG C12
Stereo Bar
Cone
Crystal & Ceramic Microphones
43. Shows the total range of the mic's internal pre- amp; Measured in dB (decibels).
3 Voltages for Phantom Power
Neumann KM 184
Dynamic Range
Boom Placement Rule
44. - Omnidirectional: 100% - Cardioid: 33% - Supercardioid: 27% - Hypercardioid: 25% - Bidirectional: 33%
Boom Placement Rule
Ambient Sound Sensitivity
Striking
Body
45. 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.
Parabolic Systems
Capacitance
Neumann U87
Spherical Mic
46. Modern drummer who has created a large kit and innovated several ways of capturing the sound from his massive kit.
Faraday's Law of Magnetic Induction
Terry Bozzio
Over/Under
Trombone Mic Placement
47. Small coil of wire wrapped around the plastic or aluminum diaphragm of a dynamic microphone.
Capacitance
Voice Coil
Types of Field Recording
Hypercardioid
48. DC Voltage Req'd for capsule polarizing voltage and internal mic preamps; 3 sources: External Power Supply Unit (PSU); Phantom Power; Battery.
Fundamental Frequency
Distance Factor
Powering Condenser Microphones
LRFB
49. 4800 ft/sec
Snare Drum Mic Placement
Model 3B Carbon Microphone
Shure KSM Series
Speed of Sound Underwater
50. Founded AKG at the end of WWII in Austria.
RFI
Coverage Angle
Over/Under
Rudolf Goerike & Ernest Pless