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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. Founded AKG at the end of WWII in Austria.






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






3. An instrument for detecting sound transmitted through water commonly manufactured using ceramic piezoelectric material.






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






5. 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.






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






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






8. Voltage applied to piezoelectric material will cause it to deform or change shape; NO PHANTOM POWER!






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






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






11. + (only); (Front capsule alone)






12. Small Diaphragm Electret condensers; Extremely flat frequency response; Omnidirectional pattern.






13. The property of certain crystals that causes them to produce voltage when a mechanical pressure such as sound vibrations is applied to them; Originates from Greek word 'piezein' (to compress).






14. Big + & - (More front with less opposite rear)






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






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






17. 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.






18. Keep in proper case; Never disassemble shockmounts






19. The world's first single element cardioid mics.






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






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






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






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






24. To capture two perspectives on the same sound.






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






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






27. Solid State and Tube.






28. 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.






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






30. 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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31. Occupying the same space and time.






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






33. 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;






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






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






36. Raises the body of the microphone increasing height.






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






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






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






40. Tube with ports down the side with the mic capsule at the bottom; Sounds entering the tube from on - axis interact inside the tube with the sounds coming in through the side ports - an interfere with each other in such a way as to partially cancel of






41. Fixed plate that is charged with polarized voltage found in condenser mics; Usually constructed of milled brass; Has a number of holes drilled in it to provide damping for diaphragm.






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






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






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






45. Dynamic; Super-Cardioid; End Address; Humbucking Coil; Brilliance Switch; Manufactured by Sennheiser; Acknowledged as the most accurate and versatile dynamic mic available.






46. 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.






47. 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'.






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






49. 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.






50. The first microphone sold by Shure; Military awarded Shure a contract to build microphones in WWII.







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