Low-Mid HELMHOLTZ absorbers question
Posted: Wed Jun 07, 2017 5:48 pm
Hello all
Referring to this method for creating a Low-Mid HELMHOLTZ absorbers for my angled side walls:
http://johnlsayers.com/Recmanual/Pages/ ... encies.htm
I often see this design using multiple slat slot sizes like here:
http://johnlsayers.com/phpBB2/download/ ... &mode=view
or here (on the right side)
http://johnlsayers.com/phpBB2/download/ ... &mode=view
As John’s Excel calculator only provides 1 absorption frequency, 1 slot and 1 slat dimension:
1. How can one predict the central frequency of the absorber when using multiple slat slots dimensions?
2. Is it possible to target multiple frequencies that way???
3. What should I input as “Depth from wall” if the absorber front face will be 12° angled?
4. How thick should be the insulation?
5. Is it possible to predict which higher frequencies will be reflected?
Referring to this method for creating a Low-Mid HELMHOLTZ absorbers for my angled side walls:
http://johnlsayers.com/Recmanual/Pages/ ... encies.htm
I often see this design using multiple slat slot sizes like here:
http://johnlsayers.com/phpBB2/download/ ... &mode=view
or here (on the right side)
http://johnlsayers.com/phpBB2/download/ ... &mode=view
As John’s Excel calculator only provides 1 absorption frequency, 1 slot and 1 slat dimension:
1. How can one predict the central frequency of the absorber when using multiple slat slots dimensions?
2. Is it possible to target multiple frequencies that way???
3. What should I input as “Depth from wall” if the absorber front face will be 12° angled?
4. How thick should be the insulation?
5. Is it possible to predict which higher frequencies will be reflected?