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Audio Video Engineering MCQs set -3

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1. What is termed as a transducer that converts acoustic sound pressure variation into the electrical signal of same amplitude, frequency and in the same proportion as pressure variations?




2. What is defined as the electrical signal in audible range (20 Hz to 20 KHz) in a microphone?




3. What is termed as the ratio of output of microphone in the presence of sound to output of microphone in the absence of sound with logarithmic base of 20?




4. What is related to uneven response to audio signals in microphone?




5. What should be the distortion to maintain the quality of microphone and Hi-Fi systems?




6. What is the percent of lobe present in rear of supercardioid microphone?




7. What is the percent of broader lobe present in rear of hypercardioid microphone?




8. Which is the correct expression for the output impedance of microphone?




9. What is defined as the speaker which covers low audio frequencies?




10. What is defined as the speaker which covers high audio frequencies?




11. What is defined as the speaker which covers mid audio frequencies?




12. What is called the combination of low-pass and high-pass filter?




13. Which of the following system have a reserve power handling capacity?




14. Which control is required in multi-way speaker system that may be balanced one against the other to give the particular feeling of concert hall?




15. Which of the following loudspeaker is used to achieve the high power output of more than 25 watts?




16. Which type of transformer does horn act in the horn type loudspeaker?




17. What is the efficiency of a horn type loudspeaker?




18. What is the distortion in horn type speaker?




19. What is the SNR (Signal to Noise Ratio) of the horn type microphone?




20. What is the range of a very low impedance microphone?




21. What is the range of a high impedance microphone?




22. On which principle is the working of moving coil microphone based?




23. What type of permanent magnet is used with Central pole piece and peripheral pole piece in moving coil microphone?




24. In which type of microphone we can speak from a distance of half meter or 25cm?




25. Which of the following microphone is also called pressure gradient and velocity microphone?




26. Which of the following microphone is mostly used in dramas and concerts?




27. Which of the following microphone have the directivity pattern shaped like a heart?




28. Which of the following microphone is costlier than other microphones?




29. On which principle is the working of crystal microphone based?




30. On which microphone ceramic can work on high temperature upto 100 degree Celsius?




31. In which form the mechanical force on the crystal is developed in both directions when there is pressure of sound waves?




32. Which type of microphone is used for mobile communications?




33. What is the capacitor equation for the capacitance microphone?




34. What is the output impedance of capacitor microphone?




35. Which type of microphone is used in sound level meter?




36. Which of the following microphone is coated with thin layer of Teflon at the back plate?




37. Which of the following is used as tie-clip microphone?




38. What happens to the resistance of carbon microphone when carbon granules are pressed and the current through the circuit increases?




39. What is the equation for the instantaneous current through load resistor in carbon microphone?




40. Which of the following microphone has the lowest cost in compare to other microphones?




41. Which of the following microphones is used only in telephones?




42. What is the distortion in carbon microphone?




43. Which of the following microphone is used for lecture delivery in the class/hall?




44. Which of the following microphone is an electret type small microphone?




45. Which type of microphone is used in sports for oath taking ceremony?




46. In which of the following microphone two matching transducing elements are used?




47. Which microphone is mounted on a long pole and operated by an audio crew member or assistant?




48. On which microphone monitoring on headphone is very much important?




49. Which microphone provides interference free communication in electrically noisy channel?




50. Which of the following microphones is used in highly explosive areas and nuclear plants?