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






2. 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.






3. 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;






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






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






6. 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.






7. Proportional to: Magnetic field strength; Length of the conductor; Velocity of conductor moving through the magnetic field.






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






9. Allows all low frequencies to pass; Blocks the higher frequencies from being processed.






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






11. Timing difference between two waves; Waves interfere cancelling each other out and altering frequency response; Measured in degrees; Can be caused by reflections of sound waves; Can be reduced by putting cabinet or amp at an angle.






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






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






14. 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.






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






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






17. 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.






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






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






20. Never store mic in a damp place; Keep dirt & dust away from the mic; Never 'pop' test the mic; Check if a mic is working by lightly scratching the grill.






21. 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.






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






23. Considered to be the best mic ever made; VF14 Tube.






24. Captures sounds arriving 90






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






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






27. Pair of cardioids facing to the front and rear - plus a sideways - facing figure 8; Mid- sides pair plus another rear- facing cardioid which is combined with the same Figure 8 mic for the surrounds.






28. 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






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






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






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






32. 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.






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






34. Forward facing bipolar mics spaced 20cm apart.






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






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






37. Mid-Section of the mic stand; Includes the clutch.






38. 4 to 6 ft. from the player; Mic should be placed below the line of sight of the bell - rotated at about 40 degrees off- axis - and tilted upward.






39. Sounds that arrive at the 0






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






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






42. 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.






43. 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.






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






45. Pair of omni mic separated by a circular absorptive baffle.






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






47. Works exactly like condenser mic but one of the two plates is manufactured as a capsule with a permanent static charge so there is no external power source necessary; Requires phantom or battery to charge internal mic preamp.






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






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






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







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