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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.
  • 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. An electrical device characterized by its capacity to store an electric charge;






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






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






4. Allows all low frequencies to pass; Blocks the higher frequencies from being processed.






5. Captures sounds arriving 90






6. Mid-Section of the mic stand; Includes the clutch.






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






8. 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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9. The first AKG dynamic microphone.






10. 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.






11. Verify that the boom is placed over a microphone leg prior to use to provide added balance and stability.






12. Close mic placement can help guard again bleed from other instruments and takes advantage of proximity effect; Center of cone = Brighter; Outside of cone = Darker; Reflections can create phase issues (can be reduced by putting the cabinet at an angle






13. Dynamic; Cardioid; End Address; Manufactured by Electro Voice; Large Diaphragm; Humbucking Coil; Bass Roll Off Switch; Minimizes proximity effect; Ideal for broadcasting and sound engineering techniques.






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






15. Dynamic; Cardioid; End Address; Manufactured by Sennheiser; Unique mic clip with quick- release button; Large diaphragm dynamic element handles high SPL's - making it great for recording guitars and drums.






16. Stereo coincident pairing where the middle mic (usually a cardiod) is facing source and a bidirectional side mic is placed at 90






17. Sounds that arrive at the 0






18. More compelling sound - giving both depth and perspective.






19. 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;






20. 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.






21. 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.






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






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






24. 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'.






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






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






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






28. 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.






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






30. Keep in proper case; Never disassemble shockmounts






31. Founded AKG at the end of WWII in Austria.






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






33. 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.






34. Solid State and Tube.






35. Mic in which the diaphragm moves in response to sound waves and an attached pin/rod moves; Coil attached to pin/rod moves alone with the diaphragm.






36. 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.






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






38. Sounds that arrive from angles other than the 0






39. Condenser; Cardioid; End Address; 48V Required; Manufactured by Neumann; Consists of three compact miniature microphones; Has a gentle rise at about 9 kHz that provides tonal balance that is fresher and livelier.






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






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






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






43. A 3- mic array using omni mics with left - right and center placement; Center is placed about 5 ft. closer to the source to eliminate 'holes' in the middle and the center levels are reduced for an even sound; Forms a triangle.






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






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






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






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






48. 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.






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






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







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