What is Acoustical Wall Fabrics?

In commercial buildings, such as theaters or concert halls, acoustical wall panels act to absorb and diffuse sound waves. The most common type of acoustical panel is known as an acoustic fabric. However, this material does not always provide the best noise mitigation for a given application. Industrial noise reduction has additional demands that are not met by standard acoustic fabrics. Paper products are also used for industrial noise control applications because they allow flexibility and can be made of recycled materials. A better alternative for sound absorption is to use a sound-absorbing material that is combined with a rigid backing such as wood or concrete in order to maintain its structural integrity when deployed in situations where the applied load exceeds its weight limit.

Acoustic wall fabrics are often confused with sound barriers. Sound barriers are wall materials that can be used for zoning in industrial and commercial facilities. These materials are designed to minimize the transfer of energy from one space to another by reducing sound transmission through the wall material. They do not absorb sounds or provide a source of inspired air, and generally do not prevent noise transmission through openings in the wall material. In contrast, acoustic fabrics absorb sound waves and provide a barrier against noise transmittal through an opening. They can also be used for zoning and enclosing private workspaces.

Acoustic fabric is a non-structural wall covering that, when hung on walls or suspended from ceilings, blocks out undesired noise while promoting a feeling of privacy and acoustic comfort in an environment. Acoustic fabric is also known as acoustical wall fabric or decorative soundproofing panels. It is made of fabrics such as cotton, polyester, and nylon that have been specially treated to enhance their noise blocking properties. There are two categories: Double Reverberant Acoustic Fabric (DRAF) and Sound Absorbing Acoustical Wall Panels (SAWP). DRAF is designed for applications that require noise reduction and shear reinforcement, and SAWP is more suitable for use in areas that require both noise attenuation as well as structural reinforcement.

Acoustic fabrics are usually made of a thick fabric made from several layers of material. The layers are sometimes combined with heat-bonds, adhesives or fasteners. The layer treatment process can be either of the mechanical or chemical type. Mechanical treatments involve stitching or weaving the entire fabric together while chemical treatments involve applying an adhesion agent between two textiles to create a composite wall covering with sound absorption properties.

In most cases, the materials used to treat fabric are minerals such as diatomaceous earth. Diatoms are tiny saltwater organisms that resemble miniature glass tubes. The diatoms form the hard outer walls of their cell and inside the walls is a soft, tubular skeleton that is made of silica. The sound-absorbing properties of diatomaceous earth are due to the fact that it consists mostly of empty space. It can be up to 90% air by volume while being only 5% solid material. These properties have made it a popular product for many industries including construction, health care, and as a food additive for animal feed and human consumption.

The sound absorption properties of diatomaceous earth have also been used to treat the fabric used to make acoustic wall panels, which is essentially a large sheet made from woven fabric. The dimensions of the diatomaceous earth fibres are about 200 µm in length and 5 µm in diameter with an average aspect ratio (height:width) of 3:1. The fibres are filled with air forming a porous medium that is thermal insulating. This means that the sound absorption properties of acoustic fabric do not change in different temperatures.

Acoustic fabrics can be produced using either wet or dry processes for the layer treatment phase. In wet process, the fibres are first washed and then dried. However, in dry process the fabric is first soaked in a set of chemicals to activate the bonding agents. The fabric is then passed through a series of screeners while being sprayed with more chemicals until a density of approximately 6 g/m2 is reached.

This density makes acoustic fabric ideal for use as sound absorption panels in noise control applications because they are resistant to high frequency sound waves. The high densities also make the material sturdy enough to withstand loads exceeding its own weight capacity for prolonged periods without tearing apart or developing too many defects due to wear and tear.

Stretched fabric wall systems?

Acoustic fabric can be produced in a variety of colours with the most common colours being white, black and green. Some fabrics are also available with patterns imprinted on them. The acoustic properties of the material, however, do not change regardless of its colour or pattern.

The sound absorption properties of acoustic fabrics are measured by the Sound Reduction Index (SRI). The lower the SRI rating, the better since it represents higher noise control performance. Rating values range from 0 to 1,000 but for industrial purposes rating values between 50 and 100 are preferred because they provide good noise reduction while still allowing good visibility through the fabric.

The SRI rating is based on the equation:

SRI = 0.14 × W(F)


W = Acoustic Transmission Ratio

F = Sound Transmission Ratio

Among its different formulation options, acoustic fabrics can be produced in a variety of densities. These density values depend on the fabric type and the desired application. Double Reverberant Acoustic Fabric (DRAF) has a density value of 9 g/m2 while SAWP has a value of over 40 g/m2. The higher the density, the lower the sound absorption rate since the material allows more sound waves to pass through it.

What is acoustical fabric?

Acoustical fabrics are used in many different industries including soundproofing, saunas, and music studios. They can also be used to cover walls and ceilings or to enclose private workspaces. Acoustic fabric can also be useful as an additional layer of protection against dust particles because of its thermal insulating properties.

While many people use acoustic fabric for noise control, it is important to note that the sound blocking capabilities of the material depend on the density value of the fabric. As a low-density material with high sound absorption capability, acoustic fabric will be most effective when used to block low frequency noises rather than high frequency noises.

Acoustic fabrics have a wide variety of applications in the sauna industry.

Fabric wall installation?

For the fabric wall installation, the fabric has to be first cleaned, spray-washed and dried. After drying, the fabric is passed through a series of air and light screens in an air press machine. The screening process usually takes several hours to complete but may vary depending on the size of the material or batch requirements.

In the acoustic wall panel industry, two different panels are used: SAWP and DRAF sauna panels. The difference between these panels is in their construction materials and also in their respective musical absorption performance ratings.

SAWP panels are meant for sauna rooms that have high sound absorption requirements due to a high number of occupants or large equipment such as heating, ventilation or drainage systems present in the room.

Acoustic Wall Panels

The manufacturers of the acoustic wall panels produce a wide range of different panels for different applications. Each panel can be designed to suit a specific purpose and if they are not intended to be used as sound absorption panels, they may instead be used for other purposes such as creating an acoustic microclimate in the room or blocking exhaust noise. The manufacturer’s website will usually contain a list of available configurations for each type of panel.

DRAF Acoustic Fabric Panels

All types of DRAF panels are environmentally friendly and do not contain any substances classified as hazardous according to the regulations set by the US Environmental Protection Agency. They are also not treated with any hazardous chemicals, so they are toxic-free, which makes them better for the environment.

SAWP panels

SAWP panels are made from a non-woven polyester structure and contain a blend of minerals to give the panels their high physical and sound absorption performance ratings of over 100 SRI. These minerals include zinc oxide (ZnO), ferrous oxide (FeO) and aluminium oxide (Al).

According to several studies, DRAF acoustic wall panels are more effective than SAWP at blocking sound waves. This is because DRAF acoustic wall panels are made using a non woven polyester fabric. The SAWP panel is made of double-faced fluted material. This type of material works by creating sound waves that reflect back to their source, which may be a conversation between two people or the sounds of machinery working inside the room.

However, another study shows that at low frequencies, SAWP acoustic panels are more effective than DRAF acoustic panels. This is most likely due to the fact that the SAWP panels have a thickness greater than 10 mm in certain areas where it exhibits maximum sound absorption performance and in areas where it has less absorption properties, there is an air gap between the two layers of fabric.

The sound absorption performance of the acoustic wall panels depends on their density and thickness. The SAWP panels have a density of 9 g/m2 while DRAF acoustic wall panels have a density of up to 40 g/m2. As a result, the SAWP panels will be most effective for high frequency sounds while the DRAF acoustic wall panel will be more effective at blocking low frequency noises.

The thermal insulating properties of these two types of acoustic wall panels also differ. According to independent testing, the SAWP acoustic wall panels are not as effective as DRAF acoustic fabric when it comes to blocking heat transmission. This is because the SAWP panels are made of double-faced material, which means that the layers are not pressed against each other and allow heat to pass through them.

Due to their thickness, DRAF acoustic wall panels are generally more effective at blocking heat transmission than SAWP panels. The density difference between the two types of acoustic wall panels also plays a role in their ability to effectively block heat. High frequency sounds such as music will create more waves than low frequency noises such as talking or whistling, which means that the tighter DRAF acoustic walls will be able to absorb and block higher frequencies than SAWP panels.

Acoustic insulation or soundproofing is the process of reducing or eliminating sound transmission. As sound travels through air and other substances, it creates wave patterns that move through the medium. The shape of the wave reflects back into itself, which causes the generated waves to be reflected back towards the source of the sound. This results in a loop of energy that oscillates through space with each subsequent reflection. Soundproofing materials can significantly reduce this interaction between waves by absorbing or blocking out some of the energy from each wave. Aside from reducing reverberation, soundproofing materials can be used to reduce noise pollution caused by loud machinery or to block out environmental sounds such as traffic noise and weather conditions.