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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)Ears are sensitive to atmospheric pressure changes.Large, slow changes pressure changes: weather and altitude changes.Extremely small and very fast pressure changes: sound.2.Sound volume or loudnessis due to rapid microscopic atmospheric pressure variations in Amplitudewhile sound pitchis due to rapid microscopic atmospheric pressure variations in frequency.(SLO 4 Explain)3.An Lp dB is a measure of sound pressure (loudness)(2 words). Lp captures only sound maximum amplitude dB or maximum pressureof a noise event.(SLO 4 Explain)4.Fill in the following table with a representative dB values.(SLO 4 Explain)EventdBWeakest sound heard0Normal conversation65Jet engine100Ear pain125613251bdefd5b03fd78e122389dca6a54b8c2e8516:33:391
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)Noise = unwanted, loud soundSubjective as to “unwanted”Subjective as to loudness.Noise and sound loudness to humans are more perceptual issues that actual dB numbers havedifficulty capturing.Given a dB sound pressure level (SPL), humans do not agree on the perceived loudness.The measuring systems do not correlate because of human attitudes.Attitudes that affect an individual’s reaction to and perception of sound: