Talk:Thiele/Small parameters

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The concept that a driver's Vas is related to the force created by compressing the volume Vas to one cubic meter is flawed. This is most clearly demonstrated by imagining that if a driver had a Vas of one cubic meter, it would then exert no force. Stiffness is force/distance and compliance is distance/force - neither of these has units of pure force as implied by stating: "...the volume of air when compressed to one cubic meter exerts a force equal to the driver's compliance". Ron E 00:58, 28 December 2005 (UTC)[reply]

Meter v/s metre.

I have noticed that unit for distances is specified/changed from "metre" to "meter". I have reverted it back to "metre". The correct nomenclature is "metre". See the article metre and its talk page as to why "metre" is the correct usage. In short, apart from US, almost every country where English is spoken has accepted "metre" as the standard nomenclature for measures of distance and "meter" as the standard convention to mean a measuring instrument. Please do not break this convention. Same for "liter". The correct word is "litre ". I have reverted this too. Rohitbd 08:34, 2 May 2006 (UTC)[reply]

cubic metre or cubic millimetre?

I am new to speaker parameters and just now learning, so if I am incorrect please understand that I am new to this and so my math maybe incorrect.

In the previous article regarding thiele/small parameters it is stated :

"Vas in the volume of air in cubic metres" Then a sentence later it is stated "to get the Vas in letres multiply by 1000, in the formula below" this would seem to imply that a cubic metre is equal to 1/1000 litre." Is that correct? I think a cubic centimeter is equal to a millilitre, but not a cubic metre. Or is the statement "Vas = to volume of air in cubic meters" not refering to the formula right below it? anyways somewhere something is wrong. 1 cubic metre is equal to 1,000 litres but are you supposed to multiply or divide? Anyway I might have the logic turned about in my head. Also I didn't want to change the main page...for fear of being incorrect and forever banned, so I thought it best to leave my post here. This is the first time to post in this "forum" so if my post is not supposed to be in this area please pardon that as well. I really like this site there is so much crap information on the internet it's nice to have a free reference source without hours of hunting down yahoo pages.L8R.....

Rest assured, there is nothing incorrect about the posted equations, I've been using them in this form for more than a decade. The volume units used in the equations is cubic meters. Since there are 1000 liters in a cubic meter, you need to multiply by 1000 to convert from cubic meters to liters. Now if you wanted to use published specs (usually quoted in liters) in the equations provided, you would divide the Vas(liters) by 1000 to get Vas in cubic meters. Units can be challenging even for engineers, it may help to work through a few examples using published specs to get a handle on things. Drivers from Peerless, Vifa, Scan Speak and SEAS tend to have very complete parameter sets that make sense using these equations. Some manufacturers, especially car audio companies, publish specs that are incomplete or inconsistent and will give problems when working through the equations.--Ron E 00:54, 1 June 2006 (UTC)[reply]