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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. Bell Labs scientist that was an innovator of many spaced pair and arrayed miking techniques.
AKG C12
Harvey Fletcher
Sensitivity
Mid/Side
2. 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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3. 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.
Carbon Microphone
E.C. Wente
AudioTechnica AT2020
Shure SM57
4. Shows the level of self- noise from a microphone's internal electronics; Measured in dB (decibels).
Noise
Ribbon Microphone
LRFB
Rudolf Goerike & Ernest Pless
5. 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
Harvey Fletcher
Crystal Mic Damage
Faraday Cage
Dual Mono
6. Omnidirectional: N/ - Cardioid: 180
Angle of Max Rejection
Neumann U67
Goals of Sound Effects
Types of Pre-Amps for Condenser Mics
7. Another name for condenser microphone.
Doubling Ribbon Length
Cone
Capacitor Microphone
Body
8. An electromagnetic microphone - in which a thin - corrugated ribbon is suspended within a high magnetic flux field; Excellent transient response due to the small amount of acoustic energy required to move diaphragm.
Ribbon Microphone
AudioTechnica AT4040
Bidirectional (Electrical Polar Pattern)
Rudolf Goerike & Ernest Pless
9. Built by AKG for Telefunken and regarded as one of the best vintage condenser microphones ever.
Rode NT1A
Highpass Filter
Telefunken ELA- M251
E.C. Wente
10. Characterized by a vacuum tube transducer; Heat rises so many are hung upside down to prevent heat from reaching the microphone head; Avoid jostling or shaking these fragile mics.
OSHA Exposure Table
Fundamental Frequency
Null Angle
Tube Condenser Microphone
11. Allow sound to reach the rear of the capsule/diaphragm - to create cardioid - supercardioid - and hypercardioid patterns In single capsule pressure gradient microphones.
Roll-Off
Phase Ports
Baffle
Hypercardioid
12. 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
Transducer Type
Coverage Angle
Hydrophone
13. 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.
RFI
Rudolf Goerike & Ernest Pless
Trumpet Mic Placement
Max SPL
14. The graphic representation plot of the sensitivity of a microphone from any direction over a 360
Shure KSM Series
Null Angle
E.C. Wente
Polar Pattern
15. 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
Hydrophone
Roswellite
Goals of Sound Effects
Pascals (Pa)
16. Measurement of the mic's sensitivity; Measured in mV/Pa (millivolts per Pascal).
Electro Voice RE20
Backplate
Capacitance
Sensitivity
17. Condenser; Cardioid; End Address; 48V Required; Manufactured by AudioTechnica; Switchable 80 Hz Hi-Pass Filter; Ideal for professional recording and critical applications in broadcast.
Subcardioid (Electrical Polar Pattern)
Omnidirectional
Crystal Mic Damage
AudioTechnica AT4051
18. Sensitive in a narrower pattern in the front than a cardioid and has a prominent/pronounced lobe at rear; Rejects most signals from 110
Hypercardioid
Angle of Max Rejection
Condenser Diaphragm
Polar Pattern
19. Close mic placement can help guard again bleed from other instruments and takes advantage of proximity effect; Center of cone = Brighter; Outside of cone = Darker; Reflections can create phase issues (can be reduced by putting the cabinet at an angle
Guitar Amp Mic Placement
C-Weighting
Ribbon Microphone
Soundfield
20. 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).
Piezoelectric Effect
Pad
Altec/Western Electric 639
Hypercardioid
21. Often look like handheld vocal mics; Talk or sing into the end of the microphone.
Coincident Pair
End Address
Shockmount
Phasing
22. Part of a mic stand that the mic stands on.
Legs
Types of Field Recording
Soundfield
DIN
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.
3 Voltages for Phantom Power
Decca Tree
Telefunken ELA- M251
Tuning Keys
24. Angle of maximum signal rejection in a microphone polar pattern.
Null Angle
OSHA Exposure Table
Arrays
Ambient Sound Sensitivity
25. Utilized primarily on condenser and ribbon mics to isolate it from vibrations that might otherwise be transmitted to the microphone through the mic stand.
Interference Tube...
Rear Sensitivity (Relative to Front)
Theatrophone
Shockmount
26. Used to filter heating current in certain mics; Invented by Georg Neumann.
Coincident Pair
Neumann KM-84
Rudolf Goerike & Ernest Pless
Sealed Ni-Cad Battery
27. 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.
SPL Meter
Leslie Cabinet
Harvey Fletcher
Crystal Mic Damage
28. The tuning machines of a guitar; Part of the tuning key that strings are threaded through and twisted.
ORTF
Pad
Machine Head
FFT Analyzer
29. A flat or roughly flat strip on the neck of a stringed instrument against which the strings are pressed to shorten the vibrating length and produce notes of higher pitches.
End Address
AudioTechnica AT2020
Leslie Cabinet
Fingerboard
30. 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.
Shure SM81
OSHA Exposure Table
Nuvistor Tube
Doubling Ribbon Length
31. To break down or disassemble any portion of a set or stage set- up.
Rear Sensitivity (Relative to Front)
Shure SM58
Striking
ORTF
32. Best signal- to- noise ratio; Minimal phase cancellation; Quality representation of what is being recorded; Attempt to ignore unwanted external noise.
Spaced Pairs
Backplate
Goals of Sound Effects
Stereo Bar
33. + & - (Front & rear in opposite equal amounts)
Microphone Storage
Bidirectional (Electrical Polar Pattern)
Electret Condenser
Alan Blumlein
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.
Cardioid (Electrical Polar Pattern)
Shure SM58
Carbon Microphone
AKG C414
35. 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.
Pistonphone
Fundamental Frequency
Packing
End Address
36. An electrical device characterized by its capacity to store an electric charge;
Telefunken ELA- M251
Capacitor
RFI
Faraday's Law of Magnetic Induction
37. Device used to calibrate sound pressure measurement devices; Emits a single 1 kHz frequency over a sustained period of time.
Pistonphone
Polar Pattern
Dual Mono
Pickup
38. The outer covering of a microphone.
AKG D36
Diaphragm
Casing
Nuvistor Tube
39. Divisions on the fingerboard which represent the position of a specific note or tone.
Roll-Off
Frets
Bidirectional
Voice Coil
40. Developed the condenser microphone in 1916 at Bell Labs.
Faraday's Law of Magnetic Induction
Georg Neumann
E.C. Wente
Neumann U47
41. 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
Hydrophone
Carbon Microphone Uses
Frets
42. The world's first single element cardioid mics.
OSHA Exposure Table
Shure Unidyne Series
Subcardioid (Electrical Polar Pattern)
Faulkner
43. 12V DC; 24V DC; 48V DC
Microphone Care...
Bidirectional
Crystal and Ceramic Mic Use
3 Voltages for Phantom Power
44. Measurement similar to how our hearing works in frequency response charts.
Motor
Carbon Microphone Uses
A-Weighting
OSHA Exposure Table
45. Coincident pairing of two bidirectional mics that make a pattern of crossing Figure 8's.
Voice Coil
Blumlein Pairing
Interference Tube...
Machine Head
46. A gradual - continuous decrease in low frequency response.
Leslie Cabinet
Roll-Off
Fundamental Frequency
Soundfield
47. Condenser; Cardioid; Side Address; 48V Required; Large Diaphragm; Manufactured by Rode; Widely recognised as the world's quietest studio microphone; Ideal for vocals - voiceover - and acoustic instruments.
Stereosonic
Pressure Gradient Capsules
FFT Analyzer
Rode NT1A
48. Used for stereo miking to ensure correct balance and imaging.
Clutch
Matched Pairs
NOS
Fundamental Frequency
49. Magnetic field opposite to that which presently exists; Do this on the bottom mic when miking a snare with two mics.
Types of Pre-Amps for Condenser Mics
Reverse Polarity
Capacitance
Distance Factor
50. 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
Neumann U67
Phase Ports
Pressure Gradient Capsules
Leslie Cabinet