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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. Solid state version of the U67.






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






3. 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.






4. Early example of switchable polar patterns; Had both a dynamic and a ribbon capsule inside of it which when combined produced other polar patterns.






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






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






7. First to mass produce the condenser microphone in 1929; Improved cutting lathe technology by developing direct drive turntables; Invents 48V Phantom Power to power the new condenser microphone for Norwegian State Television.






8. 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).






9. Microphone with 4 large diaphragm condenser capsules; 3 bidirectional and 1 omni; Can be combined to make any polar pattern.






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






11. Basket/grille made out of a specific type of copper wire to block protect the mic from physical damage and to protect the mic from stray RFI






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






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






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






15. 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;






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






17. More compelling sound - giving both depth and perspective.






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






19. Captures sounds arriving 90






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






21. Dynamic; Cardioid; End Address; Manufactured by Electro Voice; Large Diaphragm; Humbucking Coil; Bass Roll Off Switch; Minimizes proximity effect; Ideal for broadcasting and sound engineering techniques.






22. Part of a mic stand that the mic stands on.






23. Keep in proper case; Never disassemble shockmounts






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






25. 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






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






27. Derived from two words; 'electr' from electrostatic and 'et' from magnet.






28. 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.






29. Will yield a 6dB increase in output - but will cause a loss of high frequency response.






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






31. 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.






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






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






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






35. Solid State and Tube.






36. 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.






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






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






39. 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.






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






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






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






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






44. The outer covering of a microphone.






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






46. Coincident pairing that is at 90






47. 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.






48. 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






49. Radio Frequency Interference






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







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