Build an acoustic wall or absorber yourself

Sound spreads in waves that reflect on smooth surfaces and create reverberation. With sound recordings, the results are disturbed and unclean. An acoustic wall, usually called an absorber, is easy to build yourself. The frames, mostly constructed in individual modules, also help to improve the general room sound.

Acoustic wall absorbs sound waves

An absorber or acoustic wall should not be confused with a soundproof wall. While the task and construction of a soundproof wall prevents the propagation of sound waves, absorbers are used to prevent reflection.

  • Also read - Build a soundproof wall for the outside yourself
  • Also read - Test the possible effect of a soundproof wall before building it yourself
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Acoustic walls are usually not placed over a large area on all walls. Once the sound-reflecting surfaces have been determined, it is common to place the frame modules in a targeted manner. A mirror helps to determine these areas. A helper holds a mirror and walks along the walls. The mixer and sound engineer who is seated at the mixing station is always in the know when speakers and sound sources appear in the mirror. The absorbers must be installed at these points.

How to build an acoustic wall yourself

  • 5 wooden strips (depth twelve centimeters, length according to the desired dimensions)
  • Rock wool (29.80 € at Amazon *)
  • Molton
  • Metal angle
  • Staples
  • fleece
  • Screwing tool
  • Staple gun
  • scissors
  • saw
  • Auxiliary person
  • mirror

1. Saw the last to size

Your acoustic wall consists of a rectangular frame which, depending on its size, is stabilized with a cross brace. Saw the strips accordingly so that they can easily be screwed with angles to form a frame.

2. Screwing together

Place one or two metal brackets on the inside corners with which you screw the frame.

3. Cover the frame

Stretch construction or painter's fleece on the back of the frame and staple it all around and on the cross brace.

4th. Fill the frame

Place the frame upside down on the laid out molton. Fill in the frame interiors with cut rock wool. You can fix the rock wool with small point gluing. In most cases it is sufficient to press in with a little tension.

5. Tension the molton

Turn the frame over, taking along the molton. Starting at one corner, staple the molton all around. A helper should ensure that the tension is even.

Tips & Tricks If you mount spacers such as wooden blocks on the wall mounting, you increase the absorbing effect of the acoustic wall.