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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. Rotating speaker cabinet design featuring separate treble and bass drivers that can switch speeds; Speaker rotate from front to back creating a Doppler effect; Resulted in new spatial perception for each note. Stereo miked up top and single miked at






2. 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.






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






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






5. Measurement similar to how our hearing works in frequency response charts.






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






7. 12V DC; 24V DC; 48V DC






8. Big + & - (More front with less opposite rear)






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






10. 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.






11. Keep in proper case; Never disassemble shockmounts






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






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






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






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






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






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






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






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






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






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






22. Small coil of wire wrapped around the plastic or aluminum diaphragm of a dynamic microphone.






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






24. Another name for condenser microphone.






25. When miking an amp placing it near the center of this will make it sound brighter; Miking near the outer edge of this will make it sound darker and more mellow in tone.






26. Omnidirectional: 0 - Cardioid: 8 - Supercardioid: 12 dB - Hypercardioid: 6 dB - Bidirectional: 0






27. One of the world's greatest condenser microphones prized for the CK12 capsule.






28. First microphone invented by Georg Neumann






29. 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.






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






31. Measurement of the mic's sensitivity; Measured in mV/Pa (millivolts per Pascal).






32. Forward facing bipolar mics spaced 20cm apart.






33. Extremely narrow area of sensitivity in front with extended reach; Also has multiple lobes which vary in position with frequency; Not made from combining pure patterns - but created by using an interference tube.






34. 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.






35. The first phantom powered condenser microphone designed for use by Georg Neumann for Norwegian State Television.






36. 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.






37. Reduces the power of a signal used when the trim itself cannot prevent overload in the mic line level signal.






38. To capture two perspectives on the same sound.






39. A flat or roughly flat strip on the neck of a stringed instrument against which the strings are pressed to shorten the vibrating length and produce notes of higher pitches.






40. Divisions on the fingerboard which represent the position of a specific note or tone.






41. 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.






42. 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.






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






44. Captures sounds arriving 90






45. 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;






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






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






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






49. The method by which microphones are classified.






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







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