How should we model aperiodic boxes

[bjorno]

Small: ' DRIVER DAMPING AND VARIATIONS OF THE CLOSED-BOX SYSTEM

Hi All,

I made a .pdf of Small's unpublished: ' DRIVER DAMPING AND VARIATIONS OF THE CLOSED-BOX SYSTEM' paper that might be of help on how to model aperiodic enclosures, as transfer functions are given and comparisons ... gives a hint of the different merits of damping port and or the involved enclosure volumes.

b

PS: Sorry if I'm littering this forum: I've probably posted this before..

 

[Ant_222]

I made a .pdf of Small's unpublished: ' DRIVER DAMPING AND VARIATIONS OF THE CLOSED-BOX SYSTEM' paper that might be of help on how to model aperiodic enclosures, as transfer functions are given and comparisons ... gives a hint of the different merits of damping port and or the involved enclosure volumes.

Thanks, I have never seen it before.

PS: Sorry if I'm littering this forum: I've probably posted this before.

That's a problem with forums. There should probably be a dedicated page/section to host useful documents.

 

[Nikolas Ojala]

Hungry for equations and simulations of aperiodic speakers

If anyone knows useful simulations or equations that would help in designing aperiodic speakers, please type or attach them to this thread.

 

[kaameelis]

One what is capable to do it is Akabak. Only problem is to get correct data from real damping material used in aperiodic speakers. If it is know, on Akabak it is possible to define it for simulation as formula or as table representation.

 

[planet10]

problem is to get correct data from real damping material used in aperiodic speakers

This cannot be underestimated. I strongly suspect that if much better data (ie some) on charachteristics of high density damping of various sorts (i suspect differences in magnitude will grow with different materials as density increases) would give the MJK modeler more reach into adequately model aperiodic designs.

A lot of grunt work to do that.

dave

 

[GM]

If anyone knows useful simulations or equations that would help in designing aperiodic speakers, please type or attach them to this thread.

Go back and [re]read the early posts.

Some other 'frames of reference' for fiberglass, polyester would be Rick Shultz's Alpha, Omega [ML] TL articles along with some other papers, etc., 'buried' here: DIY AUDIO PROJECTS - Do-It-Yourself Hi-Fi for Audiophiles

GM

 

[Nikolas Ojala]

Excellent

Go back and [re]read the early posts.

Thanks!

I was negligent at first.

I made a .pdf of Small's unpublished: ' DRIVER DAMPING AND VARIATIONS OF THE CLOSED-BOX SYSTEM' paper that might be of help on how to model aperiodic enclosures, as transfer functions are given and comparisons ... gives a hint of the different merits of damping port and or the involved enclosure volumes.

Pretty much what I was looking for.

 

[Brinkman]

The latest version of WinISD allows you to increase the losses (Ql) of a sealed cabinet. lowering it from 10 to 3 was stated by Jeff Bagby (RIP) as providing sufficient modeling.