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






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






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






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






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






6. 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;






7. 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'.






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






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






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






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






12. 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.






13. Microphone consisting of two parallel metal plates - each holding an opposing charge (+ or -) and thus creating a capacitor to induce an electrical charge as sound waves move the diaphragm; Require a solid- state or tube preamplifier.






14. 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






15. Pure polar pattern that receives sound from both the front and back; Also known as a 'Figure 8' pattern; More proximity effect that Cardioid or Hyper Cardioid; Often found in ribbon mics.






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






17. Phenomenon causing carbon microphones to lose sensitivity as granules become packed together over extended use; To remedy problem mic is gently rapped on hard surface.






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






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






20. Raises the body of the microphone increasing height.






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






22. 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.






23. Used by government agencies to determine safe sound exposure levels (in dB) over a period of time; 85 - 90 dB = 16 hrs. of safe exposure time at 85 dB; Decreases to 8 hrs. of safe exposure time at 90 dB.






24. Shows the max sound pressure level possible with a certain amount of distortion; Measured in dB (decibels).






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






26. Captures sounds arriving 90






27. Dynamic; Cardioid; End Address; Manufactured by Shure; Popular musicians' choice due to its sturdy construction and ability to work well with instruments that produce high sound pressure levels.






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






29. The attachment that holds a microphone in place on the mic stand; Comes in various shapes - sizes - and applications.






30. Device or transducer used for converting sound waves or acoustical energy into electrical energy






31. + & + (Front & rear in equal positive amounts)






32. 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.






33. The first AKG dynamic microphone.






34. Using omnidirectional as a reference of 1 - this is a measurement of how much farther you can be from a mic to achieve equal output level in other polar pattern microphones.






35. 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






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






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






38. Dynamic; Cardioid; End Address; Manufactured by Sennheiser; Very small and compact; Especially suitable for use with drums and brass instruments; Includes a clip to mount directly on drums.






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






40. 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






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






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






43. 4 coincident mics each positioned at 90






44. Shure's ribbon microphone that utilizes Roswellite to prevent ribbon damage.






45. Coincident pairing angled between 90






46. 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.






47. Dutch broadcasting stereo mic technique; An X-Y type with the mics 30cm apart and at a 90






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






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






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






Can you answer 50 questions in 15 minutes?



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