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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. 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.






2. 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.






3. Captures sounds arriving 90






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






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. Pure polar pattern with which the microphone is equally sensitive in all directions; Great for capturing ambiance or room reverb.






8. Modeled to mimic a human head for extremely good spatialization; Shaped like a human head.






9. Stereo coincident pairing where the middle mic (usually a cardiod) is facing source and a bidirectional side mic is placed at 90






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






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






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






13. The method by which microphones are classified.






14. Developed the condenser microphone in 1916 at Bell Labs.






15. Condenser; Cardioid; End Address; Manufactured by Shure; Small condenser design that is great for instrument recording.






16. Magnetic field opposite to that which presently exists; Do this on the bottom mic when miking a snare with two mics.






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






18. Method of creating low end effects from a bass drum by creating a tunnel at the mic end thus trapping sound and amplifying low end boost.






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






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






21. Sounds that arrive at the 0






22. An instrument for detecting sound transmitted through water commonly manufactured using ceramic piezoelectric material.






23. Works exactly like condenser mic but one of the two plates is manufactured as a capsule with a permanent static charge so there is no external power source necessary; Requires phantom or battery to charge internal mic preamp.






24. Shows the level of self- noise from a microphone's internal electronics; Measured in dB (decibels).






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.






26. Measurement similar to how our hearing works in frequency response charts.






27. Coincident pairing angled between 90






28. 2 - 4 ft. from player; Placed below the line of sight of the bell - rotated at about 30 degrees off axis - and tilted upward.






29. 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.






30. The moving plate of a condenser capacitor; Constructed of a thin piece of metal or thin plastic - such as Mylar - coated with gold or nickel; .05 - 10 microns thick.






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






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






33. 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.






34. Solid State and Tube.






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






36. Term coined by Sir Charles Wheatstone derived from the Greek words 'micro' (small) & 'phon' (sound).






37. When using multiple microphones - the distance between microphones should be at least 3 times the distance from each microphone to its intended sound source.






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






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






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






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






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






43. Shows the total range of the mic's internal pre- amp; Measured in dB (decibels).






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






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






46. Omnidirectional: 360






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






48. 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.






49. The part of the guitar you turn to tune the strings in order to get the right sound out of the guitar when one plays.






50. 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.