Graph Question - Home Theater Forum and Systems - HomeTheaterShack.com

Old 05-15-07, 12:37 PM Thread Starter
Senior Shackster

Bob_99

Join Date: May 2006
Location: New Hampshire
Posts: 639
Graph Question

I wonder if someone can explain to me why when graphing frequency response, the frequency axis is displayed as logarithmic when decibels (usually shown as the 'Y' axis) is the measurement that is a logarithmic unit? Curious minds want to know ....

Thanks for any response.

Bob

"There is always hope, even if it is just a fool's hope."
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Old 05-15-07, 01:16 PM
Senior Shackster

Ethan Winer

Join Date: Jul 2006
Location: New Milford, CT, USA
Posts: 251
Re: Graph Question

We hear music and pitches as logarithmic relationships. A musical octave is a ratio of 1 to 2, and likewise for other musical intervals.

We also hear volume level that way. But dB scales are shown linearly because dB values are already inherently logarithmic.

--Ethan

Quote:
Bob_99 wrote: View Post
I wonder if someone can explain to me why when graphing frequency response, the frequency axis is displayed as logarithmic when decibels (usually shown as the 'Y' axis) is the measurement that is a logarithmic unit? Curious minds want to know ....

Thanks for any response.

Bob

Focal Press Book: The Audio Expert
Ethan Winer is offline
Old 05-15-07, 01:21 PM Thread Starter
Senior Shackster

Bob_99

Join Date: May 2006
Location: New Hampshire
Posts: 639
Re: Graph Question

Thank you, Ethan.

Bob

"There is always hope, even if it is just a fool's hope."
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