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Microphones Theory

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
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  • Match each statement with the correct term.
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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. Mounts on a single stand to provide for adjustable spacing and angling between mics.






2. More compelling sound - giving both depth and perspective.






3. Omnidirectional: 360






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






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






6. 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.






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






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






9. 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.






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. 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






12. Shure's newer ribbon studio mics; KSM 353 & 313 (Roswellite); KSM 44 - 32 - & 27.






13. 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.






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






15. Considered to be the best mic ever made; VF14 Tube.






16. To capture two perspectives on the same sound.






17. Coincident pairing angled between 90






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






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






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






21. Condenser; Cardioid; Side Address; 48V Required; Large Diaphragm; Manufactured by AudioTechnica; Transformerless circuitry virtually eliminates low- frequency distortion.






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






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






24. 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.






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






26. Omnidirectional: N/ - Cardioid: 180






27. 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.






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






29. 12V DC; 24V DC; 48V DC






30. Device or transducer used for converting sound waves or acoustical energy into electrical energy






31. 2 - 4 ft. from player; Placed below the line of sight of the bell - rotated at about 30 degrees off axis - and tilted upward.






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






33. Known as 'The Bottle' this was the first mass - produced condenser mic.






34. Condenser; Cardioid; End Address; 48V Required; Manufactured by Neumann; Consists of three compact miniature microphones; Has a gentle rise at about 9 kHz that provides tonal balance that is fresher and livelier.






35. The first AKG dynamic microphone.






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






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






38. 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.






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






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






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






42. 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






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






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






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






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






47. Radio Frequency Interference






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






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






50. 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.







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