How to make inexpensive DIY Broadband Absorbers (65$)

Описание: This video shows you how to easily make inexpensive and really effective acoustic treatment for as cheap as $65 per absorber.
These acoustic panels are designed as broadband absorbers to help minimize echoes, reverberations, and unwanted frequency buildups in your recording or listening room.

Everything You Need for 1 Absorber

1) 1 x IKEA Gersby ~ $29.99
2) 0.8 rm Molleton ~ $15.90
3) Mineral wool insulation ~ $12.25
4) Battens & staples ~ $4.90
5) 16 screws ~ $1.50
Total cost ~ $65 per absorber

Of course, you can also buy cheaper materials and build the big frame yourself instead of using a bookshelf. Then you can easily save more money. With the mineral wool, however, you should take the right one.

Other things you will need that you might already have:
Sandpaper ~$0.50
Staple Gun ~$5
Saw ~$6
Hammer ~$5
Fabric Scissors ~$10
Clamp ~$15
Screwdriver ~$30

Calculators:
Cutting calculator → https://www.opticutter.com/linear-cut...
Porous absorber calculator → http://www.acousticmodelling.com/poro...

Timestamps:

0:00 Intro
1:02 List of Materials for 1 Absorber
5:00 Building the bookcase
5:30 Building the inner frame
6:27 Cutting the fabric
6:50 Covering the frame
7:53 Inserting the frame into the shelf
8:30 Cutting the mineral wool
8:45 Filling the shelf with mineral wool
9:21 Closing the shelf
9:27 Comparison of the frequency response
11:00 Comparison of the decay time (waterfall diagram)
11:22 Comparison of the decay time (spectrogram)
12:24 Conclusion

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