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try to avoid operation below Fs [message #35803 is a reply to message #35802]

Thu, 04 April 2002 12:09

Sam P.
Messages: 307
Registered: May 2009

Grand Master

as distortion will be increasing rapidly. To determine actual system Fb with a certain enclosure/port configuration, measure the frequency of the lower and upper z peaks. Those are Fl and Fh. Now seal the port, and determine Fc, the single z peak. Fb = sq.rt. (Fl^2 + Fh^2 - Fc^2) Should be about where the dip was between the peaks when vented. Box plot advises keeping BELOW MACH 0.2 with your port velocity...if too high, as you noted, it can be audible under some conditions...Sam

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[Message index]

		Port air speed. By: dbeardsl on Thu, 04 April 2002 11:34
		try to avoid operation below Fs By: Sam P. on Thu, 04 April 2002 12:09
		Re: Port air speed. By: Wayne Parham on Thu, 04 April 2002 14:55
		we don't need no stinking subject. By: dbeardsl on Thu, 04 April 2002 23:07
		20Hz High pass filter By: Wayne Parham on Fri, 05 April 2002 00:10
		fanning air vs. imparting a compression wave By: Sam P. on Fri, 05 April 2002 10:05
		Re: Port air speed.IS BASED ON MAX POWER ON ISD By: mhammill on Thu, 04 April 2002 16:54

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