Question

An acoustic signal is reflected off a surface that is 80% absorptive. What is the dB drop in the reflected signal? (dB)

Answer 1

Answer:

sorry I don't know if know I definitely answer

Answer 2

Answer:

6.98dB drop

Explanation:

80% absorptive, so % change -80%

dB = 10log(1-(%change/100))

dB = 10log(1-(-80/100))

dB = 6.98