[sdiy] Slightly OT: really loud but light weight speakers

[Tim Parkhurst]

Use two or even three horns driven by slightly unstable oscillators (about 2
to 2.5 kHz). The beat frequencies combined with the noise from the
oscillators as they drift about would be really and truly nasty. Oh
wait...THAT'S the noise I want my cell phone to make!

Tim Servo

> -----Original Message-----
> From: harrybissell [mailto:harrybissell at prodigy.net]
> Sent: Wednesday, November 06, 2002 6:24 PM
> To: Joris
> Cc: synth-diy at dropmix.xs4all.nl
> Subject: Re: [sdiy] Slightly OT: really loud but light weight speakers
> 
> Hi Joris...
> 
> a horn driver would be less than useless without a horn... and for
> a 500Hz cutoff it will have to be a very large horn (just guessing
> maybe 4" x 10" at the mouth... with no horn it will sound really
> sick (not in a good way)
> 
> I'd go with several small tweeter horns and live with the 2KHz
> cutoff. My initial idea was to suggest you use two horns, and beat
> two high frequency oscillators... the resulting sum and difference
> tones would be very loud and very obnoxious... make the other
> bots wish they were dead...
> 
> H^) harry
> 
> Joris wrote:
> 
> > John, Peter, Oren & Stephen: thanks for the suggestions!!
> >
> > Finding a loud horn with a rolloff under 2kHz wasn't easy, but I
> > managed to find a horn driver with a freq. range of 500-18kHz:
> > http://www.etronics.com/product.asp?stk_code=pylpdb512
> >
> > Any idea if this thing would be much quieter if we didn't attach a
> > horn to it? The amount of space in the bot is quite limited as well...
> >
> > Joris



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