R/E/P Community

Please login or register.

Login with username, password and session length
Advanced search  

Pages: [1]   Go Down

Author Topic: more on the Helmholz resonator  (Read 1776 times)

dirkb

  • Newbie
  • *
  • Offline Offline
  • Posts: 31
more on the Helmholz resonator
« on: August 29, 2006, 04:55:43 pm »

Hi Fran,

I would like to know a little more on how you apply the helmholz resonators, which you obviously incorporate a lot in your designs.
1 What are the typical target ranges when:
-used in the CR?
-used in a live room or booth?

2 When you use a varrying depth, do you build separate compartments behind the slats, or is it just one big space?

3 Do you put some 703 behind them or even fill the whole cavity?

4 Do you regarded as very narrowbanded traps?

The reason why I am asking:
I have always wondered what happens with say the sub150Hz hitting a helmholz that is targeted to absorb ar around 300Hz. If you stuff the entire cavity with 703 and target the resonanz frequency at 300Hz for example, does the amount of 703, if the trap is in a corner, still work as a basstrap?

Any input is greatly appreciated!

Greetings,
Dirk
Logged

franman

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 580
Re: more on the Helmholz resonator
« Reply #1 on: September 07, 2006, 08:43:28 pm »

dirkb wrote on Tue, 29 August 2006 16:55

Hi Fran,

I would like to know a little more on how you apply the helmholz resonators, which you obviously incorporate a lot in your designs.
1 What are the typical target ranges when:
-used in the CR?
-used in a live room or booth?

>> We find the typical installation we do to be most effective in the range between 150 -350Hz..


2 When you use a varrying depth, do you build separate compartments behind the slats, or is it just one big space?


>>> NOt usually..

3 Do you put some 703 behind them or even fill the whole cavity?

>>> Yes, at least four inches behind the slats and loose fuzz in the cavity behind that..some other subtle variations (gotta keep some secrets, right!)


4 Do you regarded as very narrowbanded traps?

>>> No they are not purposely TUNED Narrow Band Traps..


The reason why I am asking:
I have always wondered what happens with say the sub150Hz hitting a helmholz that is targeted to absorb ar around 300Hz. If you stuff the entire cavity with 703 and target the resonanz frequency at 300Hz for example, does the amount of 703, if the trap is in a corner, still work as a basstrap?

>>> Yes it will.. that's the idea..


Any input is greatly appreciated!

Greetings,
Dirk

Logged
Francis Manzella - President, FM Design Ltd.
                 - Managing Director, Griffin Audio
fmdesign.com
griffinaudiousa.com

Pages: [1]   Go Up