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. Used for stereo miking to ensure correct balance and imaging.






2. Mounts on a single stand to provide for adjustable spacing and angling between mics.






3. This is what is measured to produce an electrical signal in condenser mics; This changes as sound waves strike the diaphragm causing the distance to the back plate to change.






4. 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.






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






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






7. 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.






8. 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.






9. Method of creating low end effects from a bass drum by creating a tunnel at the mic end thus trapping sound and amplifying low end boost.






10. Cable wrapping method that reduces interference and makes it easier to unravel the cable.






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






12. Forward facing bipolar mics spaced 20cm apart.






13. French physicist who pioneered piezoelectricity.






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






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






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






17. 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;






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






19. 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.






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






21. Omnidirectional: 360






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






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






24. Keep in proper case; Never disassemble shockmounts






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






26. Delicate and require extreme care; NO PHANTOM POWER; Becoming more popular than ever because of highly efficient magnets - lower manufacturing costs - and great fidelity.






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






28. 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






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






30. Solid state version of the U67.






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






32. To capture two perspectives on the same sound.






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






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






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






36. Allow sound to reach the rear of the capsule/diaphragm - to create cardioid - supercardioid - and hypercardioid patterns In single capsule pressure gradient microphones.






37. The method by which microphones are classified.






38. Solid State and Tube.






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






40. 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.






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






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






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






44. The first AKG dynamic microphone.






45. Filters only the bandwidth of frequencies that are supposed to (or allowed) to pass through; High and Low Pass are examples.






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






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






48. The arm of the mic stand; Includes the angle adjust & telescopic adjust.






49. Angle of maximum signal rejection in a microphone polar pattern.






50. Pair of omni mic elements mounted on opposite sides of a spherical shaped capsule.