Exam 1 Study Guide Aviation Adv Cpu APps - Airport Noise...

Airport Noise Study Questions (KEY)
(SLO 1 Input) (SLO 2 Execute) (SLO 3 Evaluate) (SLO 4 Explain) (SLO 5 Conclude) (SLO 6 Recommend)
1. List three causes of atmospheric pressure change and the ear’s reaction to each.
(SLO 4 Explain)
2. Sound volume or loudness is due to rapid microscopic atmospheric pressure variations in
Amplitude while sound pitch is due to rapid microscopic atmospheric pressure
variations in frequency .
(SLO 4 Explain)
4. Fill in the following table with a representative dB values.
(SLO 4 Explain)
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5. Sketch the relationship between a sound level meter and the human auditory system. Identify
the major problem this relationship produces when measuring airport noise and dealing with
airport noise complaints.
(SLO 4 Explain)
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6. In Lp terms, a clearly noticeable volume change is associated with a 5 dB change.
(SLO 4
Explain)
7. In DNL terms, a clearly noticeable sound exposure level (SEL) change is associated with a 1.5
dBA change if the new DNL is above 65 dB.
9. Sketch a graph of A-level SPL dB weighting corrections (y-axis) vs. frequency (x-axis).
Include representative dB values on the y-axis and frequency values on the x-axis. Insure your x-
axis depicts a logarithmic scale. Explain how a sound pressure level measuring device would
employ this scale to its dBA output reading. Explain the purpose of this weighting scale relative to
humans.
(SLO 4 Explain)
Symbology
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