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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. Characterized by a vacuum tube transducer; Heat rises so many are hung upside down to prevent heat from reaching the microphone head; Avoid jostling or shaking these fragile mics.






2. 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;






3. Commonly utilize large diaphragm dynamic mics.






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






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






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






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






8. Used in production sound for multiple perspectives on the set; Used in Audio Post to record a number of mics into a recorder with minimal set- up & tear down.






9. 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.






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






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






12. Most sensitive to sounds arriving from the front while rejecting sounds from rear; Shaped like a heart; Rejects most signals from 180






13. Raises the body of the microphone increasing height.






14. 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






15. 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.






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






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






18. The measure of how quickly a mic's diaphragm will react when it is hit by an acoustic sound wave.






19. Solid state version of the U67.






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






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






22. Magnetic field opposite to that which presently exists; Do this on the bottom mic when miking a snare with two mics.






23. The first dynamic microphone with changeable polar patterns.






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






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






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






27. 2 - 4 ft. from player; Placed below the line of sight of the bell - rotated at about 30 degrees off axis - and tilted upward.






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






29. 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.






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






31. French physicist who pioneered piezoelectricity.






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. Electro- acoustic device attached to a transducer that vibrates to receive or produce sound waves which put the device into motion.






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






35. 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.






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






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






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






39. 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.






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






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






42. The part of the guitar you turn to tune the strings in order to get the right sound out of the guitar when one plays.






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






44. Divisions on the fingerboard which represent the position of a specific note or tone.






45. First microphone invented by Georg Neumann






46. Developed the condenser microphone in 1916 at Bell Labs.






47. Omnidirectional: 360






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






49. Coincident pairing angled between 90






50. Use coincident or near coincident pairings; Too many microphones will cause phasing issues.







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