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Author Topic: Loudspeaker cabinet tuning / Helmholtz resonance  (Read 5104 times)

audiothings

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Loudspeaker cabinet tuning / Helmholtz resonance
« on: May 11, 2011, 11:42:57 pm »

Greetings to everyone and congratulations on the clean new look.

I had posted this question on a forum I use more frequently, but no answers forthcoming, I decided to peep in here.

A loudspeaker cabinet design software like (the free) WinISD lets you "tune" the cabinet, based on the following parameters: box volume, port shape and dimensions, number of ports, port length.

Can such a software be useful in the building of helmhotlz resonators?

Thank you.

Jai Shankar Iyer.

 
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Thomas@Northward

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Re: Loudspeaker cabinet tuning / Helmholtz resonance
« Reply #1 on: May 12, 2011, 08:20:36 am »

Greetings to everyone and congratulations on the clean new look.

I had posted this question on a forum I use more frequently, but no answers forthcoming, I decided to peep in here.

A loudspeaker cabinet design software like (the free) WinISD lets you "tune" the cabinet, based on the following parameters: box volume, port shape and dimensions, number of ports, port length.

Can such a software be useful in the building of helmholtz resonators?

Thank you.

Jai Shankar Iyer.

Well, check the exact parameters, but I don't see why not.

There are a lot of little excel tools on the net that can do that too. I'll try and see which ones I have buried on my HDD.
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boggy

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Re: Loudspeaker cabinet tuning / Helmholtz resonance
« Reply #2 on: May 13, 2011, 09:13:51 am »

.....based on the following parameters: box volume, port shape and dimensions, number of ports, port length.........

... and loudspeaker driver that you use in simulated bass reflex cabinet, with its (simulated) electro-mehanical impedance, based on Thiele/Small parameters. :)

From my experience calculators for helmholtz resonator at http://www.mh-audio.nl/ACalculators.asp works pretty well.

You can measure resonant frequency and Q factor of it (in your room) using method described here:  " Measuring Helmholtz absorber resonant frequency in non-anechoic space."

Even with loudspeaker modeling software you must always measure/tune/tweak (manually) resonant frequency for bass reflex cabinet (at end, when you finish it)... so you can't have much benefits from it (loudspeaker modeling software).


regards
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franman

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Re: Loudspeaker cabinet tuning / Helmholtz resonance
« Reply #3 on: May 13, 2011, 01:42:08 pm »

Bogic,

That is a nice Helmholtz calculator... thanks for the link!!

FM
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Francis Manzella
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Zoyla1

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Re: Loudspeaker cabinet tuning / Helmholtz resonance
« Reply #4 on: April 04, 2015, 08:17:17 am »

There are other companies that make similar competing products, but I have not found one that I like better than the Mason castings and installation technique. We use this solution on most projects that can afford the materials and support a concrete slab as the basis for floating rooms.
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