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377 Search Results Found |
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Forum: General «»
Posted on: Tue, 19 June 2012 00:39 «»
By: FloydV
Standing waves
I know that standing waves are undesirable, but I don't really know what they are.
Would someone bring me up to speed?
Floyd
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Forum: Pi Speakers «»
Posted on: Tue, 05 September 2006 14:40 «»
By: Wayne Parham
Standing waves inside cabinets
…non-parallel walls is one way of reducing standing waves, but another is to use dimensions that break them up. Damping is yet another way of reducing standing waves.A long, thin cabinet will develop pipe resonance. That's the tuning method used in a …
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Forum: Pi Speakers «»
Posted on: Fri, 31 August 2012 18:28 «»
By: Wayne Parham
Cabinet design, port placement and internal standing waves
…thing is the frequency and position of standing wave modes that line up inside the cabinet. This is what most DIYers overlook. But it is a very important consideration in speakers like these, as it directly influences sound quality, particularly in the …
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Forum: Pi Speakers «»
Posted on: Sun, 09 June 2002 19:00 «»
By: Wayne Parham
Standing waves and resonance
…to resonance.About subs, Adam was right. Standing waves are as much an issue for subs as anything else, but they are used at frequencies where wavelength scale is measured in feet. If your cabinet were several feet across then standing waves might set …
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Forum: Pi Speakers «»
Posted on: Sun, 20 January 2013 13:41 «»
By: zheka
Re: 4 PI by Andy
…it may be low passed as high as 120Hz. If standing waves indeed form in this case, they would come form the harmonics, not main content
Would you recommend using damping material for such a box? If so, what material is effective at such low …
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Forum: Pi Speakers «»
Posted on: Wed, 13 October 2010 13:09 «»
By: Wayne Parham
Dealing with internal standing waves
…e. What you won't know is what the internal standing waves do to response. So build the cabinet and make some acoustic measurements. You can even do an impedance sweep if acoustic measurements are hard to do.
If you see any noticable blips, then …
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Forum: Pi Speakers «»
Posted on: Sun, 20 January 2013 13:01 «»
By: Wayne Parham
Re: 4 PI by Andy
…frequency must be low enough that internal standing waves do not develop in the passband.
Otherwise the rules change.
If you run a big box like the one you posted as a flanking sub, then it will receive some lower midrange frequencies, and at …
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Forum: Pi Speakers «»
Posted on: Mon, 18 October 2010 16:02 «»
By: Wayne Parham
Internal standing waves and port position
…thing you're concerned about is internal standing waves. You can't prevent them from lining up inside the box, but you can prevent them from adversely affecting the response curve. The way to do this is to put the port in a benign position and/or damp …
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Forum: Pi Speakers «»
Posted on: Sun, 14 September 2003 02:24 «»
By: Wayne Parham
Re: PiAlign port
… or "pipe-organ" resonance. It is caused by standing waves within the duct, and is different from Helmholtz resonation.It is entirely reasonable to explore this property, and it is good that you brought it up.All ducts will exhibit waveguide behavior at …
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Forum: Pi Speakers «»
Posted on: Sat, 17 July 2021 10:28 «»
By: grindstone
28kHz standing waves and diffraction schlieren demo
…I've watched Wayne post the phrase "standing wave" more times than anyone on the web so thought to post here.
https://www.youtube.com/watch?v=VrgyKFBPQW4
Part 3 is a bit cooler when he levitates some balls in the standing wave. The …
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