Test your basic knowledge |

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. Timing difference between two waves; Waves interfere cancelling each other out and altering frequency response; Measured in degrees; Can be caused by reflections of sound waves; Can be reduced by putting cabinet or amp at an angle.






2. 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.






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






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






5. Sounds that arrive from angles other than the 0






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






7. The first cardioid pattern dynamic microphone.






8. 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.






9. 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;






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






11. The first AKG dynamic microphone.






12. Responds to air pressure variations outside of the capsule; Not selective of direction; Natural polar pattern is omnidirectional.






13. 12V DC; 24V DC; 48V DC






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






15. To capture two perspectives on the same sound.






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






17. + & - (Front & rear in opposite equal amounts)






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






19. 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






20. 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.






21. 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.






22. 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.






23. 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.






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






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






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






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






28. Shows the level of self- noise from a microphone's internal electronics; Measured in dB (decibels).






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






31. 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.






32. 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.






33. 2 - 4 ft. from player; Placed below the line of sight of the bell - rotated at about 30 degrees off axis - and tilted upward.






34. The outer covering of a microphone.






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






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






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






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






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






40. Configured to simulate the spacing and directivity of human hearing; Box shape with two 'ears' on each side.






41. Filters only the bandwidth of frequencies that are supposed to (or allowed) to pass through; High and Low Pass are examples.






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






43. Coincident pairing that is at 90






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






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






46. Occupying the same space and time.






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






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






49. 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.






50. 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