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






2. 4800 ft/sec






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






4. 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.






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






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






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






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






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






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






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






12. Sensitive in a slightly narrower pattern in the front than cardioid and has a small lobe at rear; Rejects most signals arriving from 125






13. First microphone invented by Georg Neumann






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






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






16. 4 coincident mics each positioned at 90






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






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






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






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






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






22. 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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23. The world's first single element cardioid mics.






24. A gradual - continuous decrease in low frequency response.






25. Measurement of the mic's sensitivity; Measured in mV/Pa (millivolts per Pascal).






26. 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.






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






28. Coincident stereo miking techniques that has two microphone diaphragms occupying (as near as possible) the same space; Capsules often on top of each other; Not good for noisy locations.






29. Modeled to mimic a human head for extremely good spatialization; Shaped like a human head.






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






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






32. Delicate and require extreme care; NO PHANTOM POWER; Becoming more popular than ever because of highly efficient magnets - lower manufacturing costs - and great fidelity.






33. 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.






34. 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.






35. 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






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






37. Pair of omni mic separated by a circular absorptive baffle.






38. 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.






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






40. 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






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






42. Condenser; Cardioid; Side Address; 48V Required; Large Diaphragm; Manufactured by Rode; Widely recognised as the world's quietest studio microphone; Ideal for vocals - voiceover - and acoustic instruments.






43. 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.






44. 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.






45. 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.






46. Raises the body of the microphone increasing height.






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






48. To oppose with equal weight or force as in the length of the boom arm versus the weight of the microphone.






49. 12V DC; 24V DC; 48V DC






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






Can you answer 50 questions in 15 minutes?



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