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Old 7th May 2007, 02:37 PM   #41
Netlist is offline Netlist  Belgium
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Looks fine. And editable at all time.

/Hugo
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Old 7th May 2007, 03:06 PM   #42
Tenson is offline Tenson  United Kingdom
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"The Hz of a panel resonance is inversely proportional to the square (?) of the panel size, eg if a panel size is doubled, the frequency of a resonance increases by a factor of 4(?)."

Are you sure panel resonance goes up by having a bigger panel? Think of Rolf Harris and his wobble board. A bigger board produces a lower frequency when it is flexed.

Perhaps you are referring to the thickness of the panel?
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Old 7th May 2007, 05:55 PM   #43
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Quote:
Originally posted by Tenson
"The Hz of a panel resonance is inversely proportional to the square (?) of the panel size, eg if a panel size is doubled, the frequency of a resonance increases by a factor of 4(?)."
Since it is inversely proportional the 4 needs to be 1/4 for the sentence to make sense.

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Old 7th May 2007, 06:32 PM   #44
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I have added some picture links, but haven't been able to figure out how this wiki actually lets you display them.

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Old 7th May 2007, 07:40 PM   #45
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It's certainly not the square.
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Old 8th May 2007, 06:10 AM   #46
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"Since it is inversely proportional the 4 needs to be 1/4 for the sentence to make sense"

Uh, yes: corrected thanks
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Old 5th March 2008, 06:47 AM   #47
USXX is offline USXX  Denmark
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Default Wrong equation

rick57, the equation you posted is incorrect. There is a problem with the brackets. The correct equation is:

f = (pi/2) * sqrt(D/p) * [(1/a^2) + (1/b^2)]

This makes sense and can be found several places in the literature (e.g. James K. Iverson, "The Theory of Loudspeaker Cabinet Resonances", Journal of the Audio Engineering Society, vol. 21, April 1973).

Let me also remind you that mass density is mass per volume, not mass per length.

The wiki should be updated!
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