Recent content by bowl_actually

This afternoon, The Moderns latest release NEXT.

For most people they would be one of the top choices. Their service where you upload information and drawings of your room and discuss your objectives with them, then come up with a plan is a really good option for most people. I'm an odd case, I actually enjoy the physics and math and have a...

Ah, good info. Great review of those. I wasn't familiar with them, but as the article points out, GIK seems to be a really good company to deal with and about as cheap as any commercial product. Thanks for adding that info.

Yea, since I have not purchased or used any of the GIK alpha series, I'm not exactly sure how it performs. However, the science of how it all works would suggest they are building a variety of different "little bottles" into their panel to broaden the range of operation. Much like I described...

Yea, I have done some reading on helmholtz perforated panels but have actually never built one. From my research, they seem to be too narrow and also very fickle to get right. But I guess that's also true with membrane absorbers and pretty much anything other than velocity absorbers (rockwool...

True, but I also need to qualify consistency as there are several components for this experiment. Consistently the same frequency response, even if that is a curved, not flat response is the key. Consistency in volume level is not as much of a problem. We're just trying to understand how the...

UPDATE: I made a clapper based on the round one in the above link. It's about 16" in diameter. I just made it out of scrap pieces I had in my shop. It works! and sometimes it works well. I get sloping response from down around 10hz to about 200hz. With the 10hz end being 10db or so above the...

Thanks John! You're an amazing person! Thanks for all you have contributed.

Ah, thanks... I guess I'm not very good at google search! Searching for most things involving "window" returns many results about the operating system from MS. I wasn't smart enough to search for "window functions" Trying to determine the best window function to use when importing an IR that...

Where can I find more detail and reference info on the IR Window settings? Specifically where can I read about what rectangular, Hann, Hamming, Cosine, Tukey, Blackman, flat-top, and Gaussian are and how they affect things? Thanks.

Not really as that would be more appropriate for the mic. However, you could, since what' you're trying to do with the clapper is discover all the room modes and problems regardless of where they are. The clapper is an almost perfect omni source, so it's going to send sound every direction...

I started a thread in the subwoofer forum asking about an appropriate subwoofer for a portable room analyzer kit. The more I searched, I am now interested in possibly using something like a clapper device to generate sound to be captured with REW for room analysis. Here's an investigation of...

They are the best I've found for controlling low frequencies. They have a wider range than a typical hemholz and are much smaller. One of the keys is to make them about the size he lists in that thread, so about 24"x15" and depth depending on what you want your center frequency. But with those...

Thanks for the response, I agree that maybe the DIY approach might be best. As for controlling those frequencies, I like to use Limp Mass Absorbers that I build using MLV that I can buy from Amazon. Here's a very old thread about how to build them. They are not very big and if you build a...

Not sure exactly where to put this question as it applies to subwoofers, and REW, and room acoustics. But since what I'm looking for is a subwoofer, I'll start here. What I'm looking for is a portable system for doing room acoustics that can give me more accurate results. I have a PC and a...