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Old 04-22-2012, 04:49 AM   #34
planetnine
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Location: Lincoln, UK
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Quote:
Originally Posted by Finnish View Post
Hi RJHOllins,

Thanks for your input!


Well, here's something that needs a rerun, I was using 75db or below SPL levels. Gonna do it again today, with 85db levels.



Here's what I found out about room modes, my room dimensions are in that calculator (calculator here http://www.marktaw.com/recording/Aco...WaveCalcu.html:



So, I'd say room modes has a big influence here! But how to manage it or deal with it?


There is something very wrong with those frequencies Finnish, I havent worked out what you've done yet, but these are the actual figures for axial modes for that room...



Code:
x	y	z	freq(Hz)
1			39.88372093
	1		45.73333333
		1	68.05555556
2			79.76744186
	2		91.46666667
3			119.6511628
		2	136.1111111
	3		137.2
4			159.5348837
	4		182.9333333
5			199.4186047
		3	204.1666667
	5		228.6666667
6			239.3023256
		4	272.2222222
	6		274.4
7			279.1860465
8			319.0697674
	7		320.1333333
		5	340.2777778
9			358.9534884
	8		365.8666667
10			398.8372093


I've sorted them into frequency order for you -watch out for that 136, 137Hz conjunction!!
(and 275Hz!)

Edit: I used c=343m/s rather than your 344, but very small difference. c(sound) is 343m/s at 20 degC.


>
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Last edited by planetnine; 04-22-2012 at 06:30 AM.
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