[whydontumarryit]

This may help
https://www.acoustic-supplies.com/absorption-coefficient-chart/

[js1955]

Thanks!   

Interesting that at 4 kHz 3" fiberglass board is more absorbent than 4".   

Typo?

[DannyBadorine]

I bought these:
https://www.acoustic-curtains.com
The people at the company were really great, but the curtains are thin and were a complete waste of money in regards to acoustic performance.  You will need something heavy and substantial to do work at all. 

[js1955]

I bought these:
https://www.acoustic-curtains.com
The people at the company were really great, but the curtains are thin and were a complete waste of money in regards to acoustic performance.  You will need something heavy and substantial to do work at all.

Hearing so many negative reports about flimsy "absorbing curtains" like this....despite their claims of effectiveness.  No getting around science, you just gotta go for the heavy ugly ones that look like moving blankets.......and try to live with the ugliness.  I linked the company previously.  Recording studios use them.

This guy went all out:

https://www.youtube.com/watch?v=jMs1Z_K8cR8

[whydontumarryit]

Thanks!   

Interesting that at 4 kHz 3" fiberglass board is more absorbent than 4".   

Typo?

ChatGPT?

[js1955]

ChatGPT?

Don't understand the question.....

[DannyBadorine]

This guy went all out:

https://www.youtube.com/watch?v=jMs1Z_K8cR8
[/quote]

That looks like a lot of work to reduce it 10db or less.........maybe I'm not getting the whole picture and I would have a different experience if I was there.  It does illustrate, as you're saying, that you really have to go all out with curtains to make any difference.  I bought mine to being more like sound treatment in the room.  That guy is doing more of a "sound proofing" type thing which is a whole different level and takes a lot more.  I was buying curtains as a compromise with my wife because when I showed her some acoustic tiles she said "we're not putting those in the living room."

I did have some success in my garage with these for speaker testing:
https://www.audimute.com/sound-absorption-sheets

But again, these are sound absorbers and just treat the room.  They won't do much for lower frequencies going through the wall.

[js1955]

Those look very similar to the VOCALBOOTHTOGO products that I linked, with the same aim at managing echo / reverb.  Priced about the same too.

My lower frequencies are pretty good so I don't need bass control.   And I don't need to control sound entering or leaving the room.  I'm only interested in dealing with echo / reverb from that big wall of windows.  If further reverb control is needed after treating windows, I'll build acoustic panels for walls.