Rectangular Throat Horn Calculator / Spreadsheet for Le cleac'h and Oblate Spheroid

[hum4god]

Hi


i have a rectangular driver , approx. 6.5 x 16.5 cm and would like to build a horn with le cleac'h or oblate spheroid flare ,
but i cannot find a le cleac'h or oblate spheroid calculator for a rectangular throat horn .
i got a tractrix spreadsheet for rectangular throat .

can anybody help ?

thanks

[Audiodidakt]

Hi

Do you have link for spreadsheet tractrix for rectangular throat ?

I have a Mundorff AMT which I would like to test in dipole horn-config.

Br Gisle

[gedlee]

OS is only round. If you just want the flare rate then its

y(X) = sqrt( y0^2 + Tan(theta)^2 x X^2)

y0 is the throat radius and theta the final wall angle (which will usually be at the -6 dB angles)

[hum4god]

thank you Dr. Geddes .

Audiodidakt , please pm me your email address and i can send you the spreadsheet for rectangular tractrix calculation.

i am still looking for the spreadsheet to calculate rectangular throat le cleac'h flare , can anybody help ?

[Ed LaFontaine]

hum4God,

ygm, I included an "elliptical geddes" just for snorts.

You will have the opportunity to choose the horizontal and vertical angles you desire...then kludge the corners to suit...

[pooge]

Originally Posted by gedlee

OS is only round. If you just want the flare rate then its

y(X) = sqrt( y0^2 + Tan(theta)^2 x X^2)

y0 is the throat radius and theta the final wall angle (which will usually be at the -6 dB angles)

theta is the half-angle of the wall-to-wall angle, I presume; i.e. from center line axis to wall?

[gedlee]

Yes, 1/2 angle

[Jmmlc]

Originally Posted by hum4god

Hi

i have a rectangular driver , approx. 6.5 x 16.5 cm and would like to build a horn with le cleac'h or oblate spheroid flare ,
but i cannot find a le cleac'h or oblate spheroid calculator for a rectangular throat horn .
i got a tractrix spreadsheet for rectangular throat .

can anybody help ?

thanks

Hello,

Hornresp can calculate both OSwaveguide (round) and Le Cléac'h horn (even mutlifacdts an square).

You then can export the profile.


You may also use the english version of my spreadsheet to calculate Le Cléac'h horns with facets. You can download it at :

http://forums.melaudia.net/attachment.php?aid=2310

Best regards from Paris, France

Jean-Michel Le Cléac'h