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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. Stereo configuration using a spaced pair 3-10 feet apart.






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






3. Microphone with 4 large diaphragm condenser capsules; 3 bidirectional and 1 omni; Can be combined to make any polar pattern.






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






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






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






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






8. First microphone invented by Georg Neumann






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






10. 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.






11. Sounds that arrive from angles other than the 0






12. Forward facing bipolar mics spaced 20cm apart.






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






14. Condenser; Cardioid; End Address; 48V Required; Manufactured by AudioTechnica; Switchable 80 Hz Hi-Pass Filter; Ideal for professional recording and critical applications in broadcast.






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






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






17. 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






18. Modern drummer who has created a large kit and innovated several ways of capturing the sound from his massive kit.






19. Determined by: Ribbon Thickness (about 3 to 6 microns); Corrugations/Inch; Tension of the Ribbon.






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






21. Mics placed in front of an instrument or ensemble (in a left/right fashion) to obtain an overall stereo image; Sound more open and natural; Weaker center image than X/Y; Great for creating background sounds that will blend in with foreground sounds.






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






23. 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.






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






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






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






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






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






29. 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.






30. 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






31. Proportional to: Magnetic field strength; Length of the conductor; Velocity of conductor moving through the magnetic field.






32. Used to make sure you have accurate angles & capsule spacing when miking in stereo.






33. 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.






34. The first phantom powered condenser microphone designed for use by Georg Neumann for Norwegian State Television.






35. The first dynamic microphone with changeable polar patterns.






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






37. Used for stereo miking to ensure correct balance and imaging.






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






39. 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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40. Angle of maximum signal rejection in a microphone polar pattern.






41. 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'.






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






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






44. 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.






45. Pure polar pattern with which the microphone is equally sensitive in all directions; Great for capturing ambiance or room reverb.






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






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






48. 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.






49. The graphic representation plot of the sensitivity of a microphone from any direction over a 360






50. Term coined by Sir Charles Wheatstone derived from the Greek words 'micro' (small) & 'phon' (sound).