- #1
JJBladester
Gold Member
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Homework Statement
Show that the following expression is true:
0.2*0.8 = -14dB + (-1.94dB)
Homework Equations
1 dB = 10log10(x) (where x is a ratio of two quantities)
10log10(ab) = 10log10(a) + 10log10(b)
The Attempt at a Solution
0.2*0.8 = -14dB + (-1.94dB)
0.16 = -15.94dB
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10log10(x)=-15.94
x=10-15.94/10=0.0255
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0.16 ≠ 0.0255 (so either my math is wrong or the expression is not true...)