Question 1

Hearing range is:

Accepted Answer

A)  20 Hz to 20 kHz
B)  2 Hz to 20 MHz
C)  200 Hz to 200 MHz
D)  Infinitely wide
E)  2 kHz to 20 MHzF) All of the above
G) C) and E) A

Question 2

Reference point for sound level measurement is:

Accepted Answer

A)  Lowest audible level by a domestic animal
B)  Absolute zero sound
C)  Smallest sound detectable by human ear
D)  Zero atmospheric pressure as found in space
E)  Inaudible level created in a test laboratoryF) A) and C)
G) C) and D)

Question 3

Sound travels through air in the form of:

Accepted Answer

A)  Sinusoidal alternating frequency
B)  Straight lines
C)  Electromagnetic radiation
D)  Waves
E)  Molecular vibrationF) A) and D)
G) None of the above

Question 4

Presbycusis is:

Accepted Answer

A)  Hearing loss due to long term exposure to noise above 90 dBA
B)  Normal deterioration in hearing due to ageing
C)  Hearing loss due to ear disease
D)  A church presbytery committee
E)  Temporary shift in hearing ability from exposure to high industrial noise levels above 95 dBCF) B) and D)
G) B) and C)

Question 5

A gas turbine rotates at 60000 RPM and has fifty blades on its largest diameter. One of the sound frequencies it produces is around:

Accepted Answer

A)  50 kHz
B)  50 Hz
C)  5000 Hz
D)  60 kHz
E)  20 kHzF) All of the above
G) B) and E) A

Question 6

Explain the meaning of SWL:

Accepted Answer

A)  Sound pressure level, meaning energy
B)  Selective wind loading
C)  Sound wind level
D)  Sound watts level, meaning power
E)  Sound watts loudness, meaning loudness powerF) D) and E)
G) A) and B)

Question 7

Which item of plant does not normally create noise?

Accepted Answer

A)  Air compressors
B)  Fans and pumps
C)  Refrigeration compressors
D)  Fired water heaters
E)  Piped systemsF) A) and C)
G) A) and B)

Question 8

A noisy machine on a plant room concrete floor:

Accepted Answer

A)  May direct sound more strongly in a particular direction
B)  Has no sound directivity
C)  Sends direct sound field through the floor
D)  Only creates a reverberant sound field
E)  Gains a benefit from sound energy absorbed by the floorF) A) and E)
G) A) and D)

Question 9

What does the building services engineer do with noise?

Accepted Answer

A)  Passes any problem to a specialist
B)  Ignores it
C)  Controls it to acceptable standard in occupied spaces
D)  Not select plant that generates noise
E)  Alters the use of the building to avoid any noise problemF) A) and D)
G) C) and D) C

Question 10

Which is the smallest increment of sound pressure level detectable by the human ear?

Accepted Answer

A)  1 W/m2
B)  1 decibel
C)  1 Bel
D)  60 Bel
E)  100 N/m2F) A) and E)
G) C) and D)

Exam 12: Room Acoustics

Hearing range is:

Correct Answer
verified
A

Reference point for sound level measurement is:

Correct Answer
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Sound travels through air in the form of:

Correct Answer
verified

Presbycusis is:

Correct Answer
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A gas turbine rotates at 60000 RPM and has fifty blades on its largest diameter. One of the sound frequencies it produces is around:

Correct Answer
verified
A

Explain the meaning of SWL:

Correct Answer
verified

Which item of plant does not normally create noise?

Correct Answer
verified

A noisy machine on a plant room concrete floor:

Correct Answer
verified

What does the building services engineer do with noise?

Correct Answer
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C

Which is the smallest increment of sound pressure level detectable by the human ear?

Correct Answer
verified

Exam 12: Room Acoustics

Hearing range is:

Correct AnswerverifiedA

Reference point for sound level measurement is:

Correct AnswerverifiedShow Answer

Sound travels through air in the form of:

Correct AnswerverifiedShow Answer

Presbycusis is:

Correct AnswerverifiedShow Answer

A gas turbine rotates at 60000 RPM and has fifty blades on its largest diameter. One of the sound frequencies it produces is around:

Correct AnswerverifiedA

Explain the meaning of SWL:

Correct AnswerverifiedShow Answer

Which item of plant does not normally create noise?

Correct AnswerverifiedShow Answer

A noisy machine on a plant room concrete floor:

Correct AnswerverifiedShow Answer

What does the building services engineer do with noise?

Correct AnswerverifiedC

Which is the smallest increment of sound pressure level detectable by the human ear?

Correct AnswerverifiedShow Answer

Correct Answer
verified
A

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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A

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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C

Correct Answer
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