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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. 4800 ft/sec






2. 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.






3. 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.






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






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






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






7. Proportional to: Magnetic field strength; Length of the conductor; Velocity of conductor moving through the magnetic field.






8. The first AKG dynamic microphone.






9. Forward facing bipolar mics spaced 20cm apart.






10. Another name for condenser microphone.






11. Used by government agencies to determine safe sound exposure levels (in dB) over a period of time; 85 - 90 dB = 16 hrs. of safe exposure time at 85 dB; Decreases to 8 hrs. of safe exposure time at 90 dB.






12. Dynamic; Cardioid; End Address; Manufactured by Electro Voice; Large Diaphragm; Humbucking Coil; Bass Roll Off Switch; Minimizes proximity effect; Ideal for broadcasting and sound engineering techniques.






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






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






15. An electromagnetic microphone - in which a thin - corrugated ribbon is suspended within a high magnetic flux field; Excellent transient response due to the small amount of acoustic energy required to move diaphragm.






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






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






18. 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.






19. 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.






20. Part of a mic stand that the mic stands on.






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






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






23. To capture two perspectives on the same sound.






24. 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.






25. 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.






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






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






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






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






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






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






32. 2 - 4 ft. from player; Placed below the line of sight of the bell - rotated at about 30 degrees off axis - and tilted upward.






33. Condenser; Cardioid/Hypercardioid; End Address; 48V Required; Manufactured by AKG; Can be powered by internal 9 V battery for field recording; Improves clarity of speech with the PB 1000 Presence Boost Adapter.






34. Digital device used to Fourier Forms; Used to measure the specific number of sine waves in a specific frequency in a specific setting.






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






36. The property of certain crystals that causes them to produce voltage when a mechanical pressure such as sound vibrations is applied to them; Originates from Greek word 'piezein' (to compress).






37. The method by which microphones are classified.






38. Quartz; Barium Titaniate - Tourmaline; Rochelle Salt - and even cane sugar.






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






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






41. Allows all low frequencies to pass; Blocks the higher frequencies from being processed.






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






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






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






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






47. Often look like handheld vocal mics; Talk or sing into the end of the microphone.






48. Solid State and Tube.






49. Basket/grille made out of a specific type of copper wire to block protect the mic from physical damage and to protect the mic from stray RFI






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