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Amplified Voice Systems

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  1. What is the purpose of the amplified voice system?
    To amplify the voice so it can be heard by shipboard personnel
  2. What is the purpose of a microphone?
    Convert sound energy into electrical energy
  3. What are the 4 types of microphones?
    • Crystal
    • Dynamic
    • Carbon
    • Magnetic
  4. Which type microphone is also known as the 'moving armature' microphone?
    Magnetic
  5. Which type of microphone is also known as the 'moving coil' microphone?
    Dynamic
  6. Which type of microphone uses the piezoelectric effect?
    Crystal
  7. Which type of microphone operates by changing its internal resistance?
    Carbon
  8. Which type of microphone requires a polarizing current?
    Carbon
  9. Which microphone is most widely used?
    Magnetic
  10. What 3 characteristics are microphones rated according to?
    • Frequency response
    • Impedance
    • Sensitivity
  11. What is the purpose of a loudspeaker?
    Convert electrical energy into sound energy
  12. What are the 2 types of loudspeakers?
    • Horn
    • Direct Radiating
  13. Which type is the simplest form of loudspeaker?
    Direct Radiating
  14. What is the capacity of a loudspeaker expressed in?
    Watts
  15. What type of loudspeaker is used in high noise spaces, or to cover large areas with sound?
    Horn
  16. What is the purpose of the 1MC?
    General announcing
  17. What is the purpose of the 6MC?
    Intership announcing
  18. What are the 5 alarms in priority from highest to lowest?
    Collision, Chemical, General, Unassigned A, Flight Crash
  19. Which alarm has the highest priority?
    Collision
  20. What color is the collision contact maker?
    Green
  21. What color is the general contact maker?
    Red
  22. What color is the chemical contact maker?
    Yellow
  23. What conditions will cause busy 1 and busy 2 lights to both be illuminated?
    • An alarm is being transmitted
    • 1MC and 6MC in use
    • 1MC or 6MC are in use using the same amplifier
  24. What is the normal operating mode of the amplifier-oscillator?
    • 1MC on 1
    • 6MC on 2
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Author
CVN68
ID
166792
Card Set
Amplified Voice Systems
Description
Advancement
Updated

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