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






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






4. 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).






5. The tuning machines of a guitar; Part of the tuning key that strings are threaded through and twisted.






6. Radio Frequency Interference






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






8. 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.






9. First microphone invented by Georg Neumann






10. 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.






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






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






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






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






15. Omnidirectional: N/ - Cardioid: 180






16. 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.






17. The head or top of the guitar where the tuning pegs are located.






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






19. 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.






20. Sounds that may be broadcast over the radio or internet.






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






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






24. 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.






25. Tube manufactured for the new version of the AKG C12 (called the C12-A); Powered by Norelco.






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






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






28. A 3- mic array using omni mics with left - right and center placement; Center is placed about 5 ft. closer to the source to eliminate 'holes' in the middle and the center levels are reduced for an even sound; Forms a triangle.






29. Often look like handheld vocal mics; Talk or sing into the end of the microphone.






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






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






32. Another name for condenser microphone.






33. An electromagnetic microphone - in which a thin - corrugated ribbon is suspended within a high magnetic flux field; Excellent transient response due to the small amount of acoustic energy required to move diaphragm.






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






36. 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






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






38. Best signal- to- noise ratio; Minimal phase cancellation; Quality representation of what is being recorded; Attempt to ignore unwanted external noise.






39. Aluminum Ribbon - Bi-Polar (Figure 8); Side Address; Manufactured by Shiny Box; Buttery mid- range improves digital recordings and smooths out modern treble; Best on drums - piano - overheads - and vocals where treble is focused.






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






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






42. Sounds that arrive at the 0






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






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






45. 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






46. 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.






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






48. The part of the guitar you turn to tune the strings in order to get the right sound out of the guitar when one plays.






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






50. 4 coincident mics each positioned at 90