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






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






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






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






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






6. 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)






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






8. 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






9. 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






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






11. 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






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






13. 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






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






15. RMS; Continuous; Program (Music)






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






17. 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)






18. Magnitude of transfer function






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






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






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






22. 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






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






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






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






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






27. 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






28. Negative or positive pole of an electric current






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






30. 2 IN / 2 OUT






31. 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






32. 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






33. Adjusting so as to be in a synchronized condition; Measurement of time






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






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






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






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






38. Most energy efficient;






39. Speaker driver designed to reproduce low frequencies






40. 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






41. 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






42. 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






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






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






45. Amp is OFF; Protection for the amplifier






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






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






48. Amps get matched to speakers!!






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






50. 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