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






2. One of the oldest mics; Diaphragm mounted on & compresses cup of tiny granules of carbon (100 microns big) that increase current flow when compressed by sound waves and vary electrical current; Also called Resistance Mics;






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






4. Measurement of Sound Pressure; stated as being N/m2 with a Newton being a measurement of force equal to about 9.8 lbs; Equal to 94dB SPL






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






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






7. Solid State and Tube.






8. 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.






9. Used in adverse conditions to protect from elements like sand - or dust.






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






11. Condenser; Cardioid; Side Address; 48V Required; Manufactured by AudioTechnica; Ideal for project/home- studio applications; Low price; Remains the low cost performance standard in side- address condenser mics.






12. The graphic representation plot of the sensitivity of a microphone from any direction over a 360






13. 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.






14. Omnidirectional: N/ - Cardioid: 180






15. Pair of omni mic elements mounted on opposite sides of a spherical shaped capsule.






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






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






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






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






20. The tuning machines of a guitar; Part of the tuning key that strings are threaded through and twisted.






21. 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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22. 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






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






24. Causes an increase in low frequency response as one gets closer to the source.






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






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






27. Big + & + (More front with less positive rear)






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






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






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






31. Raises the body of the microphone increasing height.






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






33. The combination of the ribbon and magnet in a ribbon microphone.






34. DC Voltage Req'd for capsule polarizing voltage and internal mic preamps; 3 sources: External Power Supply Unit (PSU); Phantom Power; Battery.






35. Coincident pairing angled between 90






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






37. The method by which microphones are classified.






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






39. To oppose with equal weight or force as in the length of the boom arm versus the weight of the microphone.






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






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






42. A flat or roughly flat strip on the neck of a stringed instrument against which the strings are pressed to shorten the vibrating length and produce notes of higher pitches.






43. 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.






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






45. Forward facing bipolar mics spaced 20cm apart.






46. Sub- frequency (below 100Hz) capture device designed for use with kick drums and floor toms as an alternative or supplement to a traditional microphone.






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






48. Used for stereo miking to ensure correct balance and imaging.






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






50. Dynamic; Cardioid; End Address; Manufactured by Shure; Popular musicians' choice due to its sturdy construction and ability to work well with instruments that produce high sound pressure levels.