Question
Given the following data of sound pressure levels measured at equal intervals:60dB, 62 dB, 63 dB, 59 dB, 60 dB, 80 dB, 58 dB, 59 dB, 65 dB, 57 dB, 62 dB. The value of the background noise level (L90) is :
A 62.5 dB
B 57 dB
C 61 dB
D 58 dB
View Answer
Answer & Explanation
Answer:58 dB
