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試卷名稱：114年 - 114 學士後醫學系招生考試試題：物理及化學#126679
年份：114年
科目：學士後西醫物理及化學
46. Sound pressure level is defined as SPL(dB) = 
(P⁄P0), where P is sound wave pressure
and P0 = 20 μPa. SPL decreases 6 dB as a listener's distance doubles from the sound source. The
sound level is 110 dB at one meter away from the explosion of firecrackers. How far away would
it be needed to reduce the sound level to an acceptable level of 80 decibels?
(A) 5 m
(B) 16 m
(C) 32 m
(D) 60 m
(E) 100 m
