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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. 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.






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






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






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






5. 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.






6. The first cardioid pattern dynamic microphone.






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






8. Method of creating low end effects from a bass drum by creating a tunnel at the mic end thus trapping sound and amplifying low end boost.






9. Forward facing bipolar mics spaced 20cm apart.






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






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






12. 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.






13. Occupying the same space and time.






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






15. Solid State and Tube.






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






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






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






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






20. Raises the body of the microphone increasing height.






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






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






23. Rotating speaker cabinet design featuring separate treble and bass drivers that can switch speeds; Speaker rotate from front to back creating a Doppler effect; Resulted in new spatial perception for each note. Stereo miked up top and single miked at






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






25. Reduces the power of a signal used when the trim itself cannot prevent overload in the mic line level signal.






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






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






28. The outer covering of a microphone.






29. Mounts on a single stand to provide for adjustable spacing and angling between mics.






30. A stereo miking technique similar to coincident pair - where the mics are set up with some distance between them; Distance and angle of microphones may differ; Creates a more defined stereo image; Produces very sharp images; Provides more 'air'.






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






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






33. Commonly found in acoustic guitar pickups; Ceramic piezoelectric material is used in hydrophones (underwater mics) because of durability.






34. First microphone invented by Georg Neumann






35. 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.






36. The first AKG dynamic microphone.






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






38. 12V DC; 24V DC; 48V DC






39. 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.






40. Phenomenon causing carbon microphones to lose sensitivity as granules become packed together over extended use; To remedy problem mic is gently rapped on hard surface.






41. Mics in which sound waves vibrate a piezoelectric crystal that generates a varying voltage.






42. 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;






43. Commonly utilize large diaphragm dynamic mics.






44. Tough & rugged; Can work in extremely high SPL environments; Less responsive to transient frequencies b/c of diaphragm mass is heavier than sound waves.






45. Device used to measure sound loudness; Often used to measure and balance the loudness of each speaker in a home - studio - or live venue or theater system.






46. Never store mic in a damp place; Keep dirt & dust away from the mic; Never 'pop' test the mic; Check if a mic is working by lightly scratching the grill.






47. 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






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






49. 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.






50. 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;







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