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






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






3. 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;






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






5. 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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6. 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.






7. 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.






8. 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.






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






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






11. Raises the body of the microphone increasing height.






12. Forward facing bipolar mics spaced 20cm apart.






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






14. - Omnidirectional: 100% - Cardioid: 33% - Supercardioid: 27% - Hypercardioid: 25% - Bidirectional: 33%






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






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






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






18. Causes an increase in low frequency response as one gets closer to the source.






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






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






21. Condenser; Cardioid; Side Address; 48V Required; Large Diaphragm; Manufactured by AudioTechnica; Transformerless circuitry virtually eliminates low- frequency distortion.






22. 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.






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






24. Condenser; Cardioid; Side Address; 48V Required; Large Diaphragm; Manufactured by Rode; Widely recognised as the world's quietest studio microphone; Ideal for vocals - voiceover - and acoustic instruments.






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






26. The graphic representation plot of the sensitivity of a microphone from any direction over a 360






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






28. Flat plate that controls or directs the flow of sound energy in a crystal/ceramic mic.






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






30. Tough & rugged; Can work in extremely high SPL environments; Less responsive to transient frequencies b/c of diaphragm mass is heavier than sound waves.






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






32. 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.






33. 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.






34. German broadcasting stereo mic technique; An X-Y type with the mics 20cm apart and at a 90






35. 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.






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






37. EMI employee that was the innovator of many coincident pairing mic techniques; Mid/Side & Blumlein techniques are associated with him.






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






39. 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.






40. 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.






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






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






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






44. 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.






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






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






47. 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.






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






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






50. Captures sounds arriving 90