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






2. Barrier made of shaped wire covered with a piece of nylon that is placed between a sensitive mic and the talent to avoid damage to the diaphragm of the mic.






3. - Omnidirectional: 1 - Cardioid: 1.7 - Supercardioid: 1.9 - Hypercardioid: 2 - Bidirectional: 1.7






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






5. 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






6. Coincident pairing that is at 90






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






8. Reduces the power of a signal used when the trim itself cannot prevent overload in the mic line level signal.






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






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






11. 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).






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






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






15. Sounds that arrive at the 0






16. A gradual - continuous decrease in low frequency response.






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






18. Condenser; Cardioid/Hypercardioid; End Address; 48V Required; Manufactured by AKG; Can be powered by internal 9 V battery for field recording; Improves clarity of speech with the PB 1000 Presence Boost Adapter.






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






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






21. 12V DC; 24V DC; 48V DC






22. Used in adverse conditions to protect from elements like sand - or dust.






23. 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.






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






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






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






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






28. Developed the condenser microphone in 1916 at Bell Labs.






29. Raises the body of the microphone increasing height.






30. One of the world's greatest condenser microphones prized for the CK12 capsule.






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






32. Device used to calibrate sound pressure measurement devices; Emits a single 1 kHz frequency over a sustained period of time.






33. Quartz; Barium Titaniate - Tourmaline; Rochelle Salt - and even cane sugar.






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






35. Vintage Tube Mics hold voltage after being unplugged; Be sure grounds are connected to power cord and that the charge has left microphone prior to striking.






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






37. 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.






38. 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.






39. Shows the total range of the mic's internal pre- amp; Measured in dB (decibels).






40. First microphone invented by Georg Neumann






41. 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.






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. Forward facing bipolar mics spaced 20cm apart.






44. Overall measurement close to the overall sound level in frequency response charts.






45. Sensitive in a narrower pattern in the front than a cardioid and has a prominent/pronounced lobe at rear; Rejects most signals from 110






46. Measurement of the mic's sensitivity; Measured in mV/Pa (millivolts per Pascal).






47. The first dynamic microphone with changeable polar patterns.






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






49. 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.






50. 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.