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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 AKG dynamic microphone.






2. 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.






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






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






5. 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.






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






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






8. 4 coincident mics each positioned at 90






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






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






11. Sounds that arrive from angles other than the 0






12. 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.






13. Small Diaphragm Electret condensers; Extremely flat frequency response; Omnidirectional pattern.






14. Big + & - (More front with less opposite rear)






15. 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.






16. 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.






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






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






19. 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.






20. Used to make sure you have accurate angles & capsule spacing when miking in stereo.






21. Solid State and Tube.






22. Small microphone attached to the bridge of a string bass or to an acoustic guitar to amplify its sound.






23. Early example of switchable polar patterns; Had both a dynamic and a ribbon capsule inside of it which when combined produced other polar patterns.






24. Solid state version of the U67.






25. 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.






26. Stereo configuration using a spaced pair 3-10 feet apart.






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 lowest - and usually most intense - frequency of a complex sound; Most often perceived as the sound's basic pitch.






29. 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.






30. 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






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






32. 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.






33. The first phantom powered condenser microphone designed for use by Georg Neumann for Norwegian State Television.






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






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






37. 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.






38. + (only); (Front capsule alone)






39. 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






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






41. Mic in which the diaphragm moves in response to sound waves and an attached pin/rod moves; Coil attached to pin/rod moves alone with the diaphragm.






42. Dynamic; Cardioid; End Address; Manufactured by Sennheiser; Unique mic clip with quick- release button; Large diaphragm dynamic element handles high SPL's - making it great for recording guitars and drums.






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






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






45. Best signal- to- noise ratio; Minimal phase cancellation; Quality representation of what is being recorded; Attempt to ignore unwanted external noise.






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






47. Configured to simulate the spacing and directivity of human hearing; Box shape with two 'ears' on each side.






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






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






50. Cable wrapping method that reduces interference and makes it easier to unravel the cable.







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