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why the slope of gain is -6dB/octave
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ampper



Joined: 08 Oct 2006
Posts: 63
Helped: 2
Post08 Oct 2006 8:52   

6 db per octave per decade
why the slope of fequency response of gian in Gray's book is -6dB/octave?

i know the slope is -20dB/decade, and i calculate it as follows

slope=-20dB/(log8x-log810x)
=-18dB/octave

what's wrong with my calculation?

Thanks!
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Post08 Oct 2006 8:52   

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IanP



Joined: 05 Oct 2004
Posts: 6490
Helped: 1542
Location: West Coast
Post08 Oct 2006 9:06   

octave how to calculate slope
6 dB per octave (20 log2) <=> 20 dB per decade (20 log10) ..

Regards,
IanP

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ampper



Joined: 08 Oct 2006
Posts: 63
Helped: 2
Post08 Oct 2006 10:30   

Re: why the slope of gain is -6dB/octave
IanP wrote:
6 dB per octave (20 log2) <=> 20 dB per decade (20 log10) ..

Regards,
IanP



Thanks for your quick reply and your picture ！
And now i understand it.
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