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Microphones Theory

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. The outer covering of a microphone.






2. Consumers can listen to live broadcasts over telephone lines; Individual one- way experience that required a subscription service to listen to performances.






3. 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.






4. 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).






5. - Omnidirectional: 100% - Cardioid: 33% - Supercardioid: 27% - Hypercardioid: 25% - Bidirectional: 33%






6. 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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7. 2 - 4 ft. from player; Placed below the line of sight of the bell - rotated at about 30 degrees off axis - and tilted upward.






8. 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






9. To break down or disassemble any portion of a set or stage set- up.






10. + & - (Front & rear in opposite equal amounts)






11. The arm of the mic stand; Includes the angle adjust & telescopic adjust.






12. French broadcasting stereo mic technique; An X-Y type with the mics 17cm apart and at a 110






13. Demonstrated the first stereophonic transmissions via the Theatrophone in 1881.






14. Digital device used to Fourier Forms; Used to measure the specific number of sine waves in a specific frequency in a specific setting.






15. Never store mic in a damp place; Keep dirt & dust away from the mic; Never 'pop' test the mic; Check if a mic is working by lightly scratching the grill.






16. Three or more microphones working together to capture a stereo or surround image of the sound source.






17. Carbon; Ceramic/Crystal; Magnetic/Dynamic; Ribbon; Condenser






18. Used to filter heating current in certain mics; Invented by Georg Neumann.






19. Very robust and durable; Used in telephones until 1990's; Currently finds applications for military use.






20. Pair of cardioids facing to the front and rear - plus a sideways - facing figure 8; Mid- sides pair plus another rear- facing cardioid which is combined with the same Figure 8 mic for the surrounds.






21. Allows all high frequencies to pass; Blocks the lower frequencies from being processed.






22. 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.






23. The first dynamic microphone with changeable polar patterns.






24. Occupying the same space and time.






25. Sounds that may be broadcast over the radio or internet.






26. Tough & rugged microphone that contains an element consisting of a dome- shaped diaphragm and a moving 'voice coil'; Operates on principles of magnetic induction.






27. More compelling sound - giving both depth and perspective.






28. Derived from two words; 'electr' from electrostatic and 'et' from magnet.






29. Voltage applied to piezoelectric material will cause it to deform or change shape; NO PHANTOM POWER!






30. Commonly utilize large diaphragm dynamic mics.






31. Bioacoustic Research; Documentary Journalism; Radio; Film/TV Production; Audio Post Production.






32. Shure's newer ribbon studio mics; KSM 353 & 313 (Roswellite); KSM 44 - 32 - & 27.






33. Dynamic; Super-Cardioid; End Address; Humbucking Coil; Brilliance Switch; Manufactured by Sennheiser; Acknowledged as the most accurate and versatile dynamic mic available.






34. The first microphone sold by Shure; Military awarded Shure a contract to build microphones in WWII.






35. Keep in proper case; Never disassemble shockmounts






36. Angle of maximum signal rejection in a microphone polar pattern.






37. Omnidirectional: 360






38. 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.






39. Utilized primarily on condenser and ribbon mics to isolate it from vibrations that might otherwise be transmitted to the microphone through the mic stand.






40. 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.






41. 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.






42. 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.






43. The head or top of the guitar where the tuning pegs are located.






44. 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.






45. Sensitive in a slightly narrower pattern in the front than cardioid and has a small lobe at rear; Rejects most signals arriving from 125






46. French physicist who pioneered piezoelectricity.






47. Allow sound to reach the rear of the capsule/diaphragm - to create cardioid - supercardioid - and hypercardioid patterns In single capsule pressure gradient microphones.






48. German broadcasting stereo mic technique; An X-Y type with the mics 20cm apart and at a 90






49. 1 Bidirectional & 1 Cardioid placed coincidentally; Bidirectional faces left and right and cardioid faces the sound; Gives control of the focus and size of the stereo image;






50. - Omnidirectional: 1 - Cardioid: 1.7 - Supercardioid: 1.9 - Hypercardioid: 2 - Bidirectional: 1.7






Can you answer 50 questions in 15 minutes?



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