>>I was suggesting, instead, that a speaker of some sort, connected to a
>>variable frequency oscillator with a range of say 1-20 Hz, and set into
>>a windchest wall, might just make a serviceable trem.
>
>Well, you'd need a large coned speaker capable of moving lots of air at the
>frequencies of interest, around 4 Hz on up a ways. The cone material would
>have to be polypropylene or similar, to provide some integrity, as paper is
>too fragile to deal with the constant wind pressure of the chest over a long
>period of time. This driver would require a LOT of power from a DC coupled
>amplifier. Multiply this for each chest in the organ, and you've spent a
>LOT of money, as well as having a big electric bill, just to shake some air.
>Overall, this would be most inefficient, seeing that there are more
>efficient ways to shake wind.
Sounds like you want a slow fan; like a huge, slow, Hammond Leslie.
Austin has done this...
Sincerely
Blair
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