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Microphones Theory

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes. 2 minutes extra for reading the instructions.
  • 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. Causes an increase in low frequency response as one gets closer to the source.






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






3. 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.






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






5. To capture two perspectives on the same sound.






6. 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






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






8. Used to filter heating current in certain mics; Invented by Georg Neumann.






9. Measurement similar to how our hearing works in frequency response charts.






10. 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.






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






12. 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






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






14. 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.






15. Omnidirectional: 360






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






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






18. 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.






19. Most sensitive to sounds arriving from the front while rejecting sounds from rear; Shaped like a heart; Rejects most signals from 180






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






21. Forward facing bipolar mics spaced 20cm apart.






22. Use coincident or near coincident pairings; Too many microphones will cause phasing issues.






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






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






25. French broadcasting stereo mic technique; An X-Y type with the mics 17cm apart and at a 110






26. 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






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






28. The first cardioid pattern dynamic microphone.






29. One of the oldest mics; Diaphragm mounted on & compresses cup of tiny granules of carbon (100 microns big) that increase current flow when compressed by sound waves and vary electrical current; Also called Resistance Mics;






30. 4 coincident mics each positioned at 90






31. Mics in which sound waves vibrate a piezoelectric crystal that generates a varying voltage.






32. The method by which microphones are classified.






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






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






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






36. Occupying the same space and time.






37. Omnidirectional: 0 - Cardioid: 8 - Supercardioid: 12 dB - Hypercardioid: 6 dB - Bidirectional: 0






38. Solid state version of the U67.






39. Older ribbon microphone weighing 8.5 lbs. nearly all of it the large magnet!






40. The outer covering of a microphone.






41. 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.






42. 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.






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






44. Coincident pairing that is at 90






45. 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.






46. 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.






47. Sounds that arrive at the 0






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






49. 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.






50. 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.






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