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






2. French physicist who pioneered piezoelectricity.






3. 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.






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






5. Coincident pairing angled between 90






6. Raises the body of the microphone increasing height.






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






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






9. 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.






10. 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.






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






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






13. Derived from two words; 'electr' from electrostatic and 'et' from magnet.






14. When using two microphones reverse the polarity of the bottom mic.






15. Dutch broadcasting stereo mic technique; An X-Y type with the mics 30cm apart and at a 90






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






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






18. Three or more microphones working together to capture a stereo or surround image of the sound source.






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






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






21. 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






22. The first cardioid pattern dynamic microphone.






23. 1 Bidirectional & 1 Cardioid placed coincidentally; Bidirectional faces left and right and cardioid faces the sound; Gives control of the focus and size of the stereo image;






24. Forward facing bipolar mics spaced 20cm apart.






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






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






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






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






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






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






31. 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.






32. 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






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






34. 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.






35. Device used to calibrate sound pressure measurement devices; Emits a single 1 kHz frequency over a sustained period of time.






36. 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.






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






38. First microphone invented by Georg Neumann






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






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






41. Omnidirectional: 0 - Cardioid: 8 - Supercardioid: 12 dB - Hypercardioid: 6 dB - Bidirectional: 0






42. 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.






43. The attachment that holds a microphone in place on the mic stand; Comes in various shapes - sizes - and applications.






44. 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.






45. One of the world's greatest condenser microphones prized for the CK12 capsule.






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






47. Aluminum Ribbon - Bi-Polar (Figure 8); Side Address; Manufactured by Shiny Box; Buttery mid- range improves digital recordings and smooths out modern treble; Best on drums - piano - overheads - and vocals where treble is focused.






48. 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.






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






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







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