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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. Use coincident or near coincident pairings; Too many microphones will cause phasing issues.






2. Quartz; Barium Titaniate - Tourmaline; Rochelle Salt - and even cane sugar.






3. Measurement of the mic's sensitivity; Measured in mV/Pa (millivolts per Pascal).






4. First microphone invented by Georg Neumann






5. 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.






6. Changes in air pressure from the front or the back can cause polarity cancellation; Sides have good rejection; Natural polar pattern is bidirectional.






7. Mid-Section of the mic stand; Includes the clutch.






8. 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.






9. Condenser; Cardioid; End Address; 48V Required; Manufactured by AudioTechnica; Switchable 80 Hz Hi-Pass Filter; Ideal for professional recording and critical applications in broadcast.






10. First to mass produce the condenser microphone in 1929; Improved cutting lathe technology by developing direct drive turntables; Invents 48V Phantom Power to power the new condenser microphone for Norwegian State Television.






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






12. Flat plate that controls or directs the flow of sound energy in a crystal/ceramic mic.






13. 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.






14. Will yield a 6dB increase in output - but will cause a loss of high frequency response.






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.






16. Dynamic; Cardioid; End Address; Manufactured by Electro Voice; Large Diaphragm; Humbucking Coil; Bass Roll Off Switch; Minimizes proximity effect; Ideal for broadcasting and sound engineering techniques.






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






18. + & + (Front & rear in equal positive amounts)






19. Device used to calibrate sound pressure measurement devices; Emits a single 1 kHz frequency over a sustained period of time.






20. 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.






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






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






23. The world's first single element cardioid mics.






24. Tube microphone capable of SPL's over 140dB.






25. 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.






26. Overall measurement close to the overall sound level in frequency response charts.






27. Proportional to: Magnetic field strength; Length of the conductor; Velocity of conductor moving through the magnetic field.






28. Divisions on the fingerboard which represent the position of a specific note or tone.






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






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






31. Microphone with 4 large diaphragm condenser capsules; 3 bidirectional and 1 omni; Can be combined to make any polar pattern.






32. Responds to air pressure variations outside of the capsule; Not selective of direction; Natural polar pattern is omnidirectional.






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






34. Polar pattern produced when you add a little bit of bidirectional to the omni pattern.






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






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






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






38. Older ribbon microphone weighing 8.5 lbs. nearly all of it the large magnet!






39. Coincident pairing of two bidirectional mics that make a pattern of crossing Figure 8's.






40. 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.






41. 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.






42. Filters only the bandwidth of frequencies that are supposed to (or allowed) to pass through; High and Low Pass are examples.






43. The first cardioid pattern dynamic microphone.






44. 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.






45. Mics in which sound waves vibrate a piezoelectric crystal that generates a varying voltage.






46. An extremely strong acoustic nano- film designed to replace the foil ribbon in ribbon microphones.






47. Forward facing bipolar mics spaced 20cm apart.






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






49. Aluminum Ribbon - Bi-Polar (Figure 8); Side Address; Manufactured by Shiny Box; Buttery mid- range improves digital recordings and smooths out modern treble; Best on drums - piano - overheads - and vocals where treble is focused.






50. 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.







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