There are plenty of us that will design room treatments for you - but Dennis is the best it gets as far as advice. Dennis is referring to unpublished Harman International research regarding absorption/diffusion at mirror points depending on off-axis response. Generally members of AES/ASA are up to date on the latest research. If you find an acoustical engineer too expensive for your tastes - then check out homeacoustics.net for a list of experienced HT installers with acoustical training offering design and calibration services.
You can find out the basics of predicting reverb if you buy the Master Handbook of Acoustics by Everest - the best book on acoustics there is written for the average joe with very little math. You need to be able to write a simple spreadsheet for the basic model - but reverb calculations can get very complex with advanced models. If you plan on designing it yourself - at least buy the book - otherwise you will be held hostage by treatment sellers whose treatment plans just happen to be what they sell. Nobody can really say which panel goes here unless they have come up with an entire treatment plan for the room - which is likely why your specific question has gone unanswered.
Basically with a spreadsheet you can figure out the absorption of your room without treatment - then what absorption do you need to add at what frequencies. Then you search out the panels and figure how much are needed to get that absorption, but this also assumes you know what the desired reverb of the room should be.
BasementBob has an excellent website with a database of absorbers. But you also need to factor in what brands are available to you at what price- as warehouses do not carry everything.
You can find out the basics of predicting reverb if you buy the Master Handbook of Acoustics by Everest - the best book on acoustics there is written for the average joe with very little math. You need to be able to write a simple spreadsheet for the basic model - but reverb calculations can get very complex with advanced models. If you plan on designing it yourself - at least buy the book - otherwise you will be held hostage by treatment sellers whose treatment plans just happen to be what they sell. Nobody can really say which panel goes here unless they have come up with an entire treatment plan for the room - which is likely why your specific question has gone unanswered.
Basically with a spreadsheet you can figure out the absorption of your room without treatment - then what absorption do you need to add at what frequencies. Then you search out the panels and figure how much are needed to get that absorption, but this also assumes you know what the desired reverb of the room should be.
BasementBob has an excellent website with a database of absorbers. But you also need to factor in what brands are available to you at what price- as warehouses do not carry everything.
