I'm going to embark on adding some diffusion to my bedroom system. I should be ordering some diffusors next week. My question is this: how does one measure the effectiveness of diffusion with common acoustic measuring equipment? Should I just do normal room responses and see if it's smoother? BORING. Or is there a good way to generate a polar plot before and after the diffusion of the wall? I know this sounds crazy, but it's something I'd like to do and in a sensible/presentable manner. I've seen the graphs in the Master Handbook of Acoustics, but I don't really know how they were generated. My thought is to make a rig to stand the diffusor on my speaker measuring rig, then place a mic about a meter from the diffusor. A fairly flat on axis/narrow directivity speaker would be placed about a meter away at a 45 degree angle from the diffusor. With a stack of a large absorber and some open cell foam between the speaker and the mic I'd then take a series of swept sine wave measurements while rotating the diffusor to different angles.
Any thoughts on the usefulness, oversights or foolishness of this exercise? All help appreciated. I'm really just stretching for ideas. I'd also need a control of some sort.
Thanks,
Dan
Any thoughts on the usefulness, oversights or foolishness of this exercise? All help appreciated. I'm really just stretching for ideas. I'd also need a control of some sort.
Thanks,
Dan
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