are there any engineers in the house?

[moron99]

If so, I would like your help.

I designed a loudspeaker and I want to know if it has ever been done before. It is a cabinet whose low end response is a third order bessel. It is very similar in size and shape to a standard acoustic suspension 2nd order butterworth. But the output is distinctly bessel without any of the phase distrotion and ringing you get from a butterworth.

Has it been done before? Has anybody ever built a third order bessel cabinet?

TY,
Richard

 

[jamie2112]

How bout some pics of said speaker? I am interested in seeing it.I am sure the many builders we have here will chime in as well.I myself don't know if anyone has built one before but I am sure someone has an answer..

 

[AJinFLA]

I'm not an engineer, but I play one on TV.

It is a cabinet whose low end response is a third order bessel

Show me the FR measurements.

cheers,

AJ

 

[moron99]

It looks like any old acoustic suspension.

Bessel has almost the same frequency response as Butterworth. Bessel is phase coherent to optimize impulse response.

Set your frequency generator to output the shortest possible square wave at the longest possible interval. That is a fair approximation of an impulse. When you feed this into normal speakers it will sound like a broom hitting a carpet. When you feed it into a bessel it sounds like a hammer hitting a block of wood.

 

[indulger]

Not an engineer but sounds interesting