Lighting and acoustics MCQ

1. What is the distance between two identical positions in the cycle or wave called?

Answer

Correct Answer: Wavelength

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2. What influences reverberation time?

Answer

Correct Answer: Volume

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3. What is a vibration isolator?

Answer

Correct Answer: A resilient support that tends to isolate a mechanical system from steady state excitation.

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4. What is the definition of Vibration?

Answer

Correct Answer: A force which oscillates about some specified reference point.

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5. What is the frequency region containing Ultrasounds called?

Answer

Correct Answer: Ultrasonic region

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6. What does TWA stand for?

Answer

Correct Answer: Time Weighted Average

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7. What is STRUCTURE BORNE NOISE?

Answer

Correct Answer: Noise that arrives at a point of interest by propagation through a solid structure

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8. What is sound transmission loss?

Answer

Correct Answer: The difference between the sound power level incident on a partition and that transmitted through that partition.

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9. What is the definition of speech privacy?

Answer

Correct Answer: The degree to which speech is unintelligible between offices.

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10. What is the degree to which speech is unintelligible between offices called?

Answer

Correct Answer: Speech Privacy

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11. What is the definition of speech?

Answer

Correct Answer: Communication of thoughts and feelings by spoken words.

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12. What does a sound level meter do?

Answer

Correct Answer: A sound level meter converts sound pressure variations in air into corresponding electronic signals.

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13. What is the definition of soundproofing?

Answer

Correct Answer: Building materials that make structures impervious to sound or insulates against sound.

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14. What is the sound pressure level, in decibels, of a sound?

Answer

Correct Answer: 20 times the logarithm to the base 10 of the ratio of the sound pressure to the reference pressure.

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15. Sound pressure is the difference between the ____________.

Answer

Correct Answer: Static pressure and the total instantaneous pressure

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16. What is the decibel scale used to measure?

Answer

Correct Answer: SOUND LEVEL

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17. What is a sound barrier?

Answer

Correct Answer: A material that when placed around a source of noise inhibits the transmission of that noise beyond the barrier.

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18. What is the sound absorption coefficient?

Answer

Correct Answer: The fraction of energy striking a material or object that is not reflected.

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19. What is the definition of sound absorption?

Answer

Correct Answer: The property possessed by materials, objects and air to convert sound energy into heat.

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20. What is sound?

Answer

Correct Answer: Oscillation in pressure, stress particle displacement, particle velocity in a medium

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21. What does the SMOKE DEVELOPED INDEX compare the smoke development of a particular material to?

Answer

Correct Answer: Concrete panels and red oak.

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22. What is the sound level at the listener’s ear of a speaker above the background noise level?

Answer

Correct Answer: Signal to noise ratio

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23. What is the definition of "Septum?"

Answer

Correct Answer: A thin layer of material between 2 layers of absorptive material.

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24. What does the Sabine Formula allow designers to do?

Answer

Correct Answer: Plan reverberation time in a room in advance of construction and occupancy

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25. What does SABIN stand for?

Answer

Correct Answer: A unit of sound absorption based on one square foot of material

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26. How does a sound wave lose energy?

Answer

Correct Answer: By absorption

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27. What is a frequency at which resonance exists?

Answer

Correct Answer: Resonant frequency

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28. What is the meaning of the word "resonance"?

Answer

Correct Answer: The emphasis of sound at a particular frequency.

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29. What does REFLECTION measure?

Answer

Correct Answer: The amount of sound wave energy (sound) that is reflected off a surface.

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30. What is the loss of hearing due primarily to the aging process called?

Answer

Correct Answer: Presbycusis

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31. What is presbycusis?

Answer

Correct Answer: The loss of hearing due primarily to the aging process.

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32. What is PITCH?

Answer

Correct Answer: The perceived auditory sensation of sounds expressed in terms of high or low frequency stimulus of the sound.

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33. What does the medical term "OTOLARYNGOLOGIST" refer to?

Answer

Correct Answer: A doctor specializing in disorders and treatment of the ear, nose, and throat disorders.

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34. What is the full form of "OTOLOGIST"?

Answer

Correct Answer: Doctor specializing in the structure, disorders and treatment of the ear.

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35. What is the study of the ear called?

Answer

Correct Answer: OTOLOGY

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36. What are OCTAVE BANDS?

Answer

Correct Answer: Sounds that contain energy over a wide range of frequencies

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37. What is the meaning of NR?

Answer

Correct Answer: Noise Reduction

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38. What does NORMALIZED NOISE REDUCTION mean?

Answer

Correct Answer: Noise Reduction normalized as a function of a 0.5 second reverberation time in the receiving room.

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39. What does NNR stand for?

Answer

Correct Answer: Normalized Noise Reduction

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40. What do noise criteria curves measure?

Answer

Correct Answer: Sound levels at loudest locations in a room

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41. What does NC stand for?

Answer

Correct Answer: Noise Criteria

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42. What is the definition of noise?

Answer

Correct Answer: Unwanted sound that is annoying or interferes with listening.

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43. What does MOUNTING represent?

Answer

Correct Answer: Standards established by ASTM to represent typical installation for the purpose of testing materials.

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44. What does MASS stand for?

Answer

Correct Answer: The fundamental property of a material relevant to sound transmission loss through that material.

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45. What does masking refer to?

Answer

Correct Answer: The process by which the threshold of hearing of one sound is raised due to the presence of another.

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46. What is the average deviation above and below the static value due to sound waves called?

Answer

Correct Answer: Sound Pressure

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47. What is an acoustical treatment plan for rooms in which one end is highly absorbent and the other end is reflective and diffusive?

Answer

Correct Answer: LIVE END/ DEAD END

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48. What is the drop in sound level for every doubling of distance?

Answer

Correct Answer: 6 dB

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49. What is the mean root square of the instantaneous level over a given period of time called?

Answer

Correct Answer: Intensity

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50. Which of the following is an example of impact sound?

Answer

Correct Answer: The sound of two rocks hitting each other

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51. What type of sound is produced by the collision of two solid objects?

Answer

Correct Answer: Impact sound

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52. What does the unit "Hz" stand for?

Answer

Correct Answer: Hertz

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53. What is hearing impairment?

Answer

Correct Answer: A degree of hearing loss, temporary or permanent due to many causes.

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54. What does the word "Frequency" mean?

Answer

Correct Answer: The number of oscillations or cycles per unit of time.

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55. Sound waves from a source outdoors are called what?

Answer

Correct Answer: Free Field

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56. What is the main difference between free field and reverberant sound?

Answer

Correct Answer: Free field has no obstructions while reverberant sound does

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57. What does the word "Footfall" mean?

Answer

Correct Answer: A form of impact noise that occurs when feet come into contact with a floor.

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58. What is the FIELD SOUND TRANSMISSION CLASS?

Answer

Correct Answer: A sound transmission rating obtained under "real-life" conditions.

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59. What is the full form of FSTC?

Answer

Correct Answer: Field Sound Transmission Class

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60. What does Flanking refer to?

Answer

Correct Answer: The transmission of sound around the perimeter or through holes within partitions

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61. What does FLAME SPREAD indicate?

Answer

Correct Answer: Propagation of flame across a sample

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62. What is the effective level?

Answer

Correct Answer: The root mean square of the instantaneous level over a given period of time.

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63. What is the effective level also known as?

Answer

Correct Answer: The average level

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64. What is the result of an echo flutter?

Answer

Correct Answer: A clicking, ringing, or hissing sound after the original sound signal has ceased.

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65. What does ECHO FLUTTER produce?

Answer

Correct Answer: A clicking, ringing or hissing sound

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66. What does ECHO stand for?

Answer

Correct Answer: Reflected sound producing a distinct repetition of the original sound.

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67. What is the early decay time derived from?

Answer

Correct Answer: The reverberation time decay curve

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68. What is the definition of diffusion?

Answer

Correct Answer: The scattering or random reflection of a sound wave from a surface.

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69. What does DEAF stand for?

Answer

Correct Answer: Loss of auditory sensation with or without use of assistive listening device.

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70. What is deflection?

Answer

Correct Answer: The distance an elastic body or spring moves when subjected to a static or dynamic force.

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71. What is the unit for distance an elastic body or spring moves when subjected to a static or dynamic force?

Answer

Correct Answer: Inches or mm

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72. What is decibel?

Answer

Correct Answer: Sound level in decibels as a logarithmic ratio.

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73. What is DAMPING?

Answer

Correct Answer: The dissipation of vibratory energy in solid media and structures with time or distance.

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74. What is the unit for CYCLES PER SECOND?

Answer

Correct Answer: The number of oscillations that occur in the time frame of one second.

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75. How many oscillations occur in one second?

Answer

Correct Answer: 1 cycle

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76. What is the CYCLE in acoustics?

Answer

Correct Answer: The complete oscillation of pressure above and below the atmospheric static pressure.

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77. What is the function of the cochlea?

Answer

Correct Answer: Aids in frequency recognition

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78. What is the cocktail party effect?

Answer

Correct Answer: Sound in a noisy crowded room generated mostly by conversation.

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79. What does CLOUD stand for in acoustical industry terms?

Answer

Correct Answer: An acoustical panel suspended in a horizontal position from the ceiling/roof structure.

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80. What is the definition of "boominess"?

Answer

Correct Answer: An uncontrolled amount of bass in the sound reproduced by a loudspeaker.

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81. What does BEL stand for?

Answer

Correct Answer: A measurement of sound intensity named in honor of Alexander Graham Bell.

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82. What is the meaning of the word "barrier" in the context of effective communication?

Answer

Correct Answer: Anything physical or an environment that interferes with communication or listening.

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83. What does BAFFLE mean?

Answer

Correct Answer: A free-hanging acoustical sound absorbing unit

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84. What does AMBIENT NOISE refer to?

Answer

Correct Answer: Noise level in a space from all sources

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85. What is the definition of Ambient Noise?

Answer

Correct Answer: Noise level in a space from all sources such as HVAC or extraneous sounds from outside the space.

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86. What does A WEIGHTINGfilter out?

Answer

Correct Answer: Lower frequency sounds

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87. What does a weighting do in a sound meter?

Answer

Correct Answer: Allows the meter to largely ignore lower frequency sounds

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88. What does attenuation refer to?

Answer

Correct Answer: The ability of a medium to transmit sound energy.

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89. What is an ASSISTIVE LISTENING DEVICE?

Answer

Correct Answer: An electronic device that provides amplification of sound to a hearing-impaired person.

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90. What is the area effect?

Answer

Correct Answer: Acoustical materials spaced apart can have greater absorption than the same amount of material butted together.

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91. What is the measure of speech intelligibility influenced by Acoustical Environment rated from 0.01 to 1.00 called?

Answer

Correct Answer: Articulation Index

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92. What is the single number rating used for acoustical ceilings and acoustical screens for speech privacy purposes?

Answer

Correct Answer: ARTICULATION CLASS

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93. What is the purpose of an Articulation Class?

Answer

Correct Answer: To compare acoustical ceilings and acoustical screens for speech privacy purposes

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94. What is the purpose of architectural acoustics?

Answer

Correct Answer: To control noise in a building space

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95. What is AIRBORNE SOUND?

Answer

Correct Answer: Sound that reaches the point of interest by propagation through the air.

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96. What is Airborne Noise?

Answer

Correct Answer: Noise that arrives at a point of interest by propagation through the air.

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97. What is impedance?

Answer

Correct Answer: The resistance to the flow of sound through a medium.

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98. What does an acoustical consultant do?

Answer

Correct Answer: Provide advice on acoustical requirements and noise control

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99. What does ACOUSTICAL ANALYSIS refer to?

Answer

Correct Answer: A review of a space to determine the level of reverberation or reflected sound in the space

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100. What does an acoustic calibrator do?

Answer

Correct Answer: Provides a reference noise source to calibrate the performance of sound level meters

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101. What does the word "acoustical" mean?

Answer

Correct Answer: The properties of a material to absorb or reflect sound

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102. What does the Acoustical Society of America do?

Answer

Correct Answer: Publishes standards and information related to the study and applications of acoustics.

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103. What is the name of a sensor that contains an electrical output that is directly proportional to the acceleration component of the vibration?

Answer

Correct Answer: Accelerometer

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104. What does an accelerometer measure?

Answer

Correct Answer: Vibration

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105. What is the science of sound called?

Answer

Correct Answer: Acoustics

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