Test your basic knowledge |

Speakers Amplifiers Monitors And Transducers

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. Combination of 2 wiring techniques; Divide set of speakers into groups (wired in series) and wire the groups in parallel; Used typically for car audio






2. Suspension; Diaphragm; Dust Cap; Surround+Spider (Suspension); Cone/Baffle; Magnet Assembly; Voice Coil; Coil Form; Basket






3. Amp is OFF; Protection for the amplifier






4. Coil of copper or aluminum wire attached to the backside of the cone that vibrates at the frequency of the electrical signal; Frequency matches the frequency of the sound produced by the cone






5. Should be light (for quicker and more accurate voltage response) & ridged (to reduce flexing or bowing during speaker movement); Also pushes heat out by pulling cold air in






6. Converts from acoustic energy to electrical energy






7. W-Channel Amp is converted to a 1-Channel Amp (1 IN / 1 OUT); Must use both positive connections on PA ouputs because it reverses itself out of polarity






8. RMS; Continuous; Program (Music)






9. Doubling of the voltage or pressure will always give a 6 dB gain; Halving of the pressure or voltage will always give a 6 dB loss; Sound INTENSITY drops 6 dB with each doubling of the distance (Inverse Square Law)






10. Type of speaker designed specifically to reproduce low frequencies; Subwoofers; Piston motor attached to large baffles; Size and cost are the major drawbacks






11. Represents how much in pink noise level that a speaker can hold on average






12. Two notes with frequencies related by a ratio of 2:1






13. Positives wired to negatives; Impedance added through simple addition; If single speaker fails the entire chain fails






14. Converts from electrical energy to acoustic energy which one perceives as sound






15. Frequency Response; Power (Program vs. Peak); Sensitivity; Impedance






16. A heat dissipation device - usually a passive metal object with a flat surface - attached to an amplifier






17. Made of ferrite or neodymium (stronger); Non - serviceable; Attached to the back of the speaker basket






18. Works best at low frequencies (below 5 kHz); Moving parts are serviceable; All energy at center of speaker; Normally described by their diameter (10' - 12' - 15' - 18'); Largest model is 32'; Smaller cone = better high frequency response






19. Closest to perfectly reproducing sound; No cabinets required;






20. If on for any length of time it could signify damage to loudspeakers and/or amplifiers






21. Parallel; Series; Series/Parallel (Power requirement always adds up)






22. The total opposition that a device or transmission line will show to an AC or DC current at a specific frequency; Measured in Ohms (






23. 2 IN / 2 OUT






24. Most common type of speaker transducer; Use a combination of electricity from a power amplifier (or other device) and an already present magnetic field to move baffle; Very efficient (loud with little power input); BAD = Wide frequency range






25. Negative or positive pole of an electric current






26. Most energy efficient;






27. Operates just like a dynamic loudspeaker except it has no cone; Small diaphragm must be used with a flared horn; Usually made of titanium; Used for high frequencies; Classified by size of openings (1' & 2' standard today); High efficiency but low pow






28. Most accurate and simplest design; One component kept 'hot' with 100% available energy at all times; Makes a lot of heat b/c energy is drawn through it's power cable; Very clean sound with low distortion rates






29. Repair process for speaker failure where loudspeaker is completely torn down and rebuilt from scratch






30. Type of speaker designed specifically to reproduce high frequencies; Usually piezoelectric drivers (which are used in hearing aids and cell phones but not in audio world)






31. Sound wave guiding structure used to amplify and focus sound coming from compression driver; Sound dispersion is horizontal and vertical






32. The lowest amount of impedance the speaker will present to the amplifier






33. Speaker driver designed to reproduce low frequencies






34. Electrical device that converts one form of energy into another






35. A device that divides frequency bands and sends them to their respective drivers - or speakers






36. Speaker system having 2 different sized transducers; Developed by Bell Labs in 1931; Had phasing issues due to frequency crossover but fixed this with circuit board that contained high & low pass filters






37. Preferred method that allows the user to power several loads at different times or at once; Ohms value for the set of speakers will be less than any one of the single speakers in the set; Impedance divides as speakers are added






38. Random noise that is at equal energy at all frequencies; - More energy at lower frequencies; Decreases in amplitude at 3 dB per octave






39. Cabinet is able to focus a majority of its sound down to around 200 - 300 hZ; Ability to focus sound and more volume due to horns natural amplification






40. Cone drivers mounted up front; No pattern control; High drivers always in horns because they are easy to control






41. Paper; Polypropylene; Poly/Plastic; Kevlar; Aluminum






42. Output transducer used to output sound; Last piece in the sound reinforcement chain






43. Magnitude of transfer function






44. The amount of energy measured over time measured in Watts (W)






45. Tend to be used by consumer market; Represents how much a speaker can hold for a short hit or transient






46. Surround + Spider; Help keep the speaker from unwanted movement (side to side) and help maintain control over the speaker's movement (fore and aft); Attached to the cone and basket assembly; Surround on outside & spider on inside






47. Optimum speaker powering should be somewhere between Program and Peak power






48. Bullet- like object in center of speaker driver; It prevents high frequencies from cross - cancelling each other






49. Protects all inner working of the cone






50. Holds cone loudspeaker components together; Serves as a support skeleton