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






2. Sensitive in a narrower pattern in the front than a cardioid and has a prominent/pronounced lobe at rear; Rejects most signals from 110






3. Shows the total range of the mic's internal pre- amp; Measured in dB (decibels).






4. Solid state version of the U67.






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






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






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






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






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






10. Demonstrated the first stereophonic transmissions via the Theatrophone in 1881.






11. 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.






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






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. 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.






15. 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.






16. 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






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






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






19. French physicist who pioneered piezoelectricity.






20. Cable wrapping method that keeps every coil on top of the next; May cause interference and tiny curls or tangles.






21. Coincident pairing angled between 90






22. Consumers can listen to live broadcasts over telephone lines; Individual one- way experience that required a subscription service to listen to performances.






23. Sounds that arrive from angles other than the 0






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






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






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






27. Extremely narrow area of sensitivity in front with extended reach; Also has multiple lobes which vary in position with frequency; Not made from combining pure patterns - but created by using an interference tube.






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






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






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






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






32. 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.






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






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






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






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






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






38. Coincident pairing of two bidirectional mics that make a pattern of crossing Figure 8's.






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






40. The moving plate of a condenser capacitor; Constructed of a thin piece of metal or thin plastic - such as Mylar - coated with gold or nickel; .05 - 10 microns thick.






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






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






43. 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.






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






45. Commonly utilize large diaphragm dynamic mics.






46. The outer covering of a microphone.






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






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






49. The lowest - and usually most intense - frequency of a complex sound; Most often perceived as the sound's basic pitch.






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







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