🚀 go-pugleaf

In article <1e95llINN9gt@saffron.csv.warwick.ac.uk> maufd@csv.warwick.ac.uk (Mr J S Graley) writes:
>I am trying to design loudspeakers from fundemental aucoustic laws. This has
>been a harder task than I seemed initially. Most books on speakers skirt 
>around the neccesarry explainations and simply give you final designs with
>formulae for dimensions, but deducing the theory from this evidence is a
>near herculean task!
>
>I wonder if any people in the know about this could either post or email me
>information or easy to obtain (eg in England) sources of info?
>
>I interested in the following effects:
>
> Exponential horns
>
> Ported cavities
>
> Level of airload at various frequencies
>
> Effect of airload on driver efficiency

Much of the information you are looking for (at least on a theoretical
basis) is available in two relatively significant works:

    N. W. McLachlan, "Loud Speakers: Theory, Performance, Testing and
       Design," Dover, New York 1934 (1960 ed.)

    L. L. Beranek, "Acoustics," American Institute of Physics, New York,
       1954, 1986

There are also the landmark articles by A. N. Thiele and Richard H. Small,
available from the Audio Engineering Society Journal between 1971 and
1973. These are probably the most relevant sources for theory on how to
make the damn things work.

Unfortunately, as the vast market of mediocre to bad speakers illustrate,
it takes a lot more than this to design good loudspeakers. (actually, it
takes a proper understanding of this information to make things work,
something which the vast majority of engineers to not posess!).

-- 
|                Dick Pierce                |
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