These are two completely different substances that should have the same role, but one does a much better job than the other. So it doesn’t matter which one we prefer, because they seriously affect the acoustics of the rooms in both negative and positive directions.

If sound absorption, then acoustic sponge?

sponge-169x300Usually, everyone thinks about this first when the goal is to create targeted sound absorption, e.g. during the design of a home studio. Sponge panels are also suitable on some levels, but if you really want to choose quality, acoustic rock wool will definitely be the solution. It has many benefits, so in many cases you can’t even trace this special material with a sponge.

Why is it that most people opt for a sponge? This is mainly because they see this glued to the walls of the studios in various videos. It’s basically pretty simple, yet less effective, especially if not the ideal quality is used. As we know, the egg-based, styrofoam solution is advertised on many forums, but insulating foam is also often misunderstood. If possible, these methods are completely avoided when it comes to sound insulation. It is no coincidence that there are separate thermal and sound insulation materials and coverings on the market. Rock wool, on the other hand, also stands out as a sound and heat insulation, mainly due to its fibrous structure. The styrofoam and its companions, on the other hand, are completely stiff and reflect the sound waves, ergo does not solve anything, and they also disfigure the interior. The egg-bearing solution on top of this is even flammable.

Rock wool with invisible efficiency

Built into the wall as an insulating material, it is completely invisible and therefore does not spoil the overall picture. It does not absorb moisture, in addition it is fireproof, so it is safer than a sponge. Suitable for both external and internal use. With facade insulation, it can also be used as external sound insulation to keep out sounds from the outside. If you want to eliminate the internal echo, it is built behind traditional or acoustic plasterboard that has favorable sound-absorbing properties. Not only vertical surfaces, but also horizontal floors and ceilings can be insulated with rockwool, depending on the situation. These benefits can also be enjoyed during general use. If, on the other hand, we look at it specifically as an acoustic element, it will also be the winner, only in a different form.

A stylish form of spectacular sound absorption


There are several types of rock wool, depending on where it is placed. However, sound-absorbing panels containing acoustic cotton do not need to be installed in the wall, under the floor, above the ceiling, because they can be used on their own. They also stand out as a design element. They are available in a very wide range of colors, so they can be easily adapted to the style of the room. They can be placed on the wall as required, but can also be used as separate elements with fold-in legs. The acoustic silk coating also adds a lot to the look, not to mention its effectiveness. It belongs to the group of broadband acoustic elements. Exactly what this means will be explained below.

The secret lies in the ability to absorb sound

But what is the acoustic factor that makes it much better to opt for rock wool than sponge? It is no coincidence that this material is also used by professional studios.

Suppose we are not satisfied with the sound of the given space, so we start to wallpaper the room with sponge panels as damping. Even so, the sound doesn’t improve, and it’s even more and more that we get the impression that it’s getting worse and dull, and the deep sounds are coming out in a disturbing way.

This is because the sponge is unable to fulfill the function of a broadband acoustic product, in this case rock wool. It has a low body density, so it works well if the goal is to attenuate the higher frequency range. Improper use can result in over-attenuation, rendering the entire room lifeless, so it is important to use these elements wisely in the right place in the right place.

Acoustic rock wool with other materials


Especially in the case of a studio, it may be advisable to fine-tune the acoustics with wood diffusers or resonators in addition to the acoustic cotton panels. If the room vibrates due to the bass, it significantly distorts the sound image and degrades the final result in the mixing or recording studios. Wood is one of the best bass absorbers, so diffusers and resonators should be placed at reflection points. Paired with rock wool, a much clearer sound is achieved. Based on the size of the room, it can be calculated how many resonators and diffusers need to be installed.

Overall, the sponge is cheap, but by no means sufficient to create the right acoustic conditions. And this may become apparent in the short term. With acoustic cotton and additional quality acoustic elements, an impeccable sound is achieved, resulting in a more demanding, healthier living space.

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