Diffusor Construction?

Hi... I´m designing a Conference Room for a client, so... what I need is to have some infor about a Diffusor... This room (that I´m treating) it have a lot of reflective surfaces... so, I´ve no problem to absorv the sound waves, but I need to hear clearly the mid / mid-high range... so.. I´ve decided to put some diffusors systems.. I´m going to build it myself... but I really don´t remember how is the most properly way to approach this. Thanks a lot! Fernando Musarra AWS

fernando - the BBC has produced some excellent papers on this here http://www.bbc.co.uk/rd/pubs/reports/ cheers john

Well John... I must say... THANKS AGAIN! you´re always outhere for us! Best wishes! Fernando Musarra AWS