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






2. Small coil of wire wrapped around the plastic or aluminum diaphragm of a dynamic microphone.






3. 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.






4. Verify that the boom is placed over a microphone leg prior to use to provide added balance and stability.






5. Keep in proper case; Never disassemble shockmounts






6. 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.






7. Commonly utilize large diaphragm dynamic mics.






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






9. The reduction in the amplitude of a wave due to the dissipation of wave energy.






10. Bell Labs scientist that was an innovator of many spaced pair and arrayed miking techniques.






11. An electrical device characterized by its capacity to store an electric charge;






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






13. 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.






14. 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.






15. Solid State and Tube.






16. The measuring device used for loudspeaker room response testing.






17. Modern drummer who has created a large kit and innovated several ways of capturing the sound from his massive kit.






18. Commonly found in acoustic guitar pickups; Ceramic piezoelectric material is used in hydrophones (underwater mics) because of durability.






19. A stereo miking technique similar to coincident pair - where the mics are set up with some distance between them; Distance and angle of microphones may differ; Creates a more defined stereo image; Produces very sharp images; Provides more 'air'.






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






21. When using two microphones reverse the polarity of the bottom mic.






22. Omnidirectional: 360






23. 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.






24. Reduces the power of a signal used when the trim itself cannot prevent overload in the mic line level signal.






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






27. 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.






28. The method by which microphones are classified.






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






30. Most sensitive to sounds arriving from the front while rejecting sounds from rear; Shaped like a heart; Rejects most signals from 180






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






32. Built by AKG for Telefunken and regarded as one of the best vintage condenser microphones ever.






33. EMI employee that was the innovator of many coincident pairing mic techniques; Mid/Side & Blumlein techniques are associated with him.






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






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






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






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






38. Adds two outer right and left rear facing mics to a Decca tree for surround sound depth.






39. Often look like large diaphragm studio mics; Talk or sing into the side of the microphone.






40. Omnidirectional: 0 - Cardioid: 8 - Supercardioid: 12 dB - Hypercardioid: 6 dB - Bidirectional: 0






41. Shure's ribbon microphone that utilizes Roswellite to prevent ribbon damage.






42. A gradual - continuous decrease in low frequency response.






43. Tube manufactured for the new version of the AKG C12 (called the C12-A); Powered by Norelco.






44. 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.






45. The first dynamic microphone with changeable polar patterns.






46. 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.






47. Founded AKG at the end of WWII in Austria.






48. Captures sounds arriving 90






49. Cable wrapping method that keeps every coil on top of the next; May cause interference and tiny curls or tangles.






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






Can you answer 50 questions in 15 minutes?



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