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Audio 4.94 - Over 11,000 Files
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Testing
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VU Mathematica
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1992-01-22
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575 lines
(*^
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3
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3
;[o]
3
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Solve[{a x1 + b == d/2, a x2 + b == -d/2},{a, b}]
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{{a -> d/(x1 - x2), b ->
-(d*x1)/(2*(x1 - x2)) - (d*x2)/(2*(x1 - x2))}}
;[o]
d -(d x1) d x2
{{a -> -------, b -> ----------- - -----------}}
x1 - x2 2 (x1 - x2) 2 (x1 - x2)
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x1=Log[10-5];x2=Log[10- -60];d=180;a=d/(x1-x2);b=-d/2(x1+x2)/(x1-x2)
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(-90*(Log[5] + Log[70]))/(Log[5] - Log[70])
;[o]
-90 (Log[5] + Log[70])
----------------------
Log[5] - Log[70]
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f[dB_] := a Log[10-dB] + b;
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