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How do you absorb high-frequency sound?

High-frequency sounds are bright, sharp sounds with short wavelengths that are easily reflected off hard surfaces such as concrete, glass, and tile. These sounds can be particularly disruptive in environments such as offices, restaurants, homes, and public spaces where good acoustics are crucial for comfort and concentration. Common examples of high-frequency sounds include keyboard clicks, the clatter of plates and cutlery, loud voices, cell phone notifications, and various electronic sounds.

Because high-frequency sounds are quickly reflected, they can create unpleasant echoes and a harsh sound environment that increases stress levels and reduces concentration. To create a more comfortable acoustic environment, it is therefore important to effectively dampen these sounds with the right materials and methods.

An effective way to absorb high-frequency sound is to use soft, porous, and absorbent materials that capture sound waves instead of allowing them to bounce off. Thicker and more porous materials, such as polyester fiber sound absorbers or textile-based absorbers, are particularly effective because they allow sound waves to penetrate the material, where the sound energy is converted into heat.

Another very effective method of reducing high-frequency sound is to place sound absorbers strategically on walls and ceilings where sound is most often reflected. Covering a large part of these surfaces greatly reduces echoes and reverberation time. It is also important to remember that even small details such as curtains, carpets, and furniture with soft surfaces can help to further absorb high-frequency sound.

The placement of sound absorbers is crucial to the result. In spaces where there are many people moving around or where the noise level is often high, such as restaurants or open-plan offices, it is recommended that sound absorbers be placed close to the sound sources. By installing absorbers on ceilings and walls near tables, workstations, and meeting places, sound waves are quickly captured, resulting in a quieter sound environment with less reverberation.

Even small changes, such as using textiles on tables and chairs, can help to dampen sharp sounds from cutlery or keyboards, for example. Also keep in mind that combinations of different types of absorbent materials give the best results. By mixing different thicknesses and materials, you can ensure that the entire spectrum of high-frequency sounds is effectively dampened.

To achieve optimal sound absorption of high-frequency sounds, at least 20-30 percent of the surfaces in the room should be covered with sound absorbers. The higher the proportion of absorbent surface, the better the result. Through careful planning and the right combination of absorbent materials, you can create a sound environment that is both pleasant and functional.

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The benefits of absorbing high-frequency sound

High-frequency sounds are bright, sharp, and fast-reflecting sounds that can easily create unpleasant and stressful environments. Typical examples include keyboard clicks, clattering plates and cutlery, loud voices, mobile notifications, and electronic signals. These sounds can be particularly disruptive in offices, restaurants, schools, and homes where concentration, comfort, and tranquility are important. Absorbing high-frequency sounds involves using materials and techniques to reduce sound reflection and reverberation. Effective sound absorption can create a calmer and more comfortable environment, which offers several significant benefits.

Reduced reverberation and echo – a more pleasant sound environment
High-frequency sound is quickly and easily reflected from hard surfaces such as glass, concrete, and tile. This often creates disturbing reverberations and echoes, which can lead to discomfort and increased stress. By using sound absorbers made of soft, porous materials, these reflections can be effectively dampened. This creates a more pleasant sound environment where sounds are quickly absorbed and do not bounce around the room.

Improved concentration and peace of mind
In work environments such as open-plan offices or schools, high-frequency sounds can be particularly distracting. The constant noise from keyboards, conversations, and electronic devices can make it difficult to focus. By strategically placing sound absorbers on walls and ceilings near workstations and meeting areas, these sounds can be quickly captured, reducing distractions and improving both concentration and productivity.

A more relaxed and pleasant atmosphere
Restaurants and public spaces often suffer from sharp sounds from crockery, cutlery, and conversations, which can make the environment stressful and less pleasant. Effective sound absorption can soften and muffle the sound environment, making guests and staff feel more relaxed and welcome. This increases comfort and encourages guests to stay longer and return.

Clearer communication and improved speech intelligibility
When sound is strongly reflected, conversation and communication become more difficult as voices compete with echoes and other disturbing noises. The use of sound absorbers significantly improves speech intelligibility. Sound becomes clearer and easier to perceive, which is important in meeting rooms, classrooms, and restaurants where conversation is a central part of the activity.

Less stress and better well-being
A sharp and noisy sound environment increases stress levels in people who spend time there. Continuous exposure to high-frequency sounds can lead to headaches, fatigue, and irritation. By dampening these sounds with sound-absorbing materials, stress levels can be reduced and well-being increased, creating a healthier and more sustainable indoor environment.

Effective combination of materials for optimal results
For the best possible sound environment, it is recommended to combine different types and thicknesses of sound absorbers. Materials such as polyester fiber, textile absorbers, and soft textiles such as curtains, carpets, and upholstered furniture work together to effectively capture the entire spectrum of high-frequency sounds. By combining these, you can optimize the sound environment for each unique space.

Increased property value and greater appeal
Premises and homes with good acoustics are perceived as more attractive and modern. An investment in sound absorption can therefore increase both comfort and the long-term value of the property. A good sound environment is becoming increasingly important when choosing a workplace, home, or public environment, making sound absorption an important investment in both comfort and attractiveness.

A professional and aesthetically pleasing solution
Today's sound absorbers are easy to integrate into the aesthetics of the premises. With stylish and modern material choices, sound-absorbing solutions can both improve acoustics and contribute to a stylish and professional design. Sound absorbers are available in many colors and shapes, allowing you to create an aesthetically pleasing and harmonious interior without compromising on sound comfort.

How do you absorb high-frequency sound?

Step-by-step guide: How to effectively absorb high-frequency sounds

High-frequency sounds – such as keyboard clicks, voices, porcelain sounds, and electronic noise – are easily reflected off hard surfaces in rooms, causing unpleasant echoes and reverberations. By using the right sound absorbers, you can significantly reduce these disturbing sounds and create a more comfortable and functional environment.

In this guide, based on SilentDirect's extensive expertise in sound absorption, we show you exactly how to effectively eliminate high-frequency sounds in offices, restaurants, homes, and studios, for example.

Step 1: Install sound absorbers in the ceiling first

The ceiling reflects large amounts of high-frequency sound waves. Therefore, you should always start with ceiling absorbers to quickly improve the sound environment.

Step 1.1 – Installation of SilentDirect PES Ceiling or Ceiling Fabric

- Start by installing SilentDirect PES Ceiling or SilentDirect PES Ceiling Fabric, which effectively absorbs sound waves before they can bounce.

- SilentDirect PES Ceiling Fabric also has an attractive, tailor-made fabric that is removable and washable. You can install the absorbers either flush against the ceiling or suspended, which provides an effective air gap and further improves the absorption of both high- and low-frequency sounds.

Features and benefits of SilentDirect PES Ceiling products

SilentDirect PES Ceiling and Ceiling Fabric are free from adhesives and binders, making them environmentally friendly and safe for your health. They do not release fibers or dust and contain at least 50% recycled polyester.

Results
You immediately get better sound comfort and lower noise levels in the room.

Step 2: Install sound absorbers on the walls

After the ceiling, the walls are the most important surfaces to address. They are responsible for a large part of the reflections that interfere with conversation and concentration.

Step 2.1 – Place absorbers strategically

- Install SilentDirect PES Wall or SilentDirect PES Wall Fabric on the walls where sound waves bounce the most, especially in workplaces or dining areas where conversations occur frequently.

- Just like the ceiling products, SilentDirect PES Wall Fabric comes with an attractive, tailor-made fabric that is removable and washable. The absorbers are free from adhesives and binders and are very easy to install.

Features and benefits

SilentDirect PES products effectively absorb high-frequency sounds from all directions, providing even sound reduction throughout the room. The products are also completely free of adhesives and binders and contain recycled materials, which is beneficial for both the indoor environment and the environment in general.

Results
A significantly quieter, calmer, and more pleasant sound environment with a clear reduction in reverberation.

Step 3: Use sound-absorbing screens and room dividers

In open rooms and large spaces, high-frequency sounds easily spread over large areas. Sound-absorbing screens are ideal for stopping these sounds.

Results
The working environment is noticeably improved, with lower stress levels and better speech intelligibility.

Step 4: Soft textiles complement sound absorption

Combine SilentDirect products with soft interior textiles. Curtains, carpets, and upholstered furniture effectively contribute to additional sound absorption.

Textiles effectively absorb sound energy and further reduce the noise level in the room.

Result
A more comfortable, quieter sound environment where voices and high-frequency sounds are clearly dampened.

Step 5: Improve acoustics with corner and diagonal absorbers

In large, echoing rooms, sound can accumulate and amplify in corners and angles. SilentDirect offers special corner-mounted and diagonally mounted absorbers that effectively break up sound waves and reduce sound propagation.

Result
The acoustics are optimized and the room feels noticeably quieter and more comfortable.

By installing sound absorbers such as SilentDirect PES Ceiling and SilentDirect PES Wall, and complementing them with soft textiles and strategically placed screens, you can effectively dampen high-frequency sounds. The result is a clear sound environment with a high level of comfort and well-being.

Did you know that..

High-frequency sound is often the first thing we notice in a noisy environment, but is it also the easiest to dampen? Many people believe that all sound frequencies are absorbed in the same way, but high-frequency sounds—such as voices, sharp sounds from cutlery, or loud electronic tones—are effectively blocked by soft, porous materials that capture the sound waves before they have time to bounce around the room.

Thin sound absorbers can be more effective than thick ones for high-frequency sounds. Since high frequencies have shorter wavelengths, they do not require as much material to be absorbed. A layer of sound-absorbing fabric, acoustic panels, or a bookcase filled with unevenly placed books can break up sound waves and drastically reduce reverberation.

Curtains can be just as effective as acoustic panels—if they are pleated! A smooth curtain makes almost no difference, but if it has deep pleats, it can absorb high-frequency sounds just as well as a dedicated sound absorber.

So next time a room feels sharp and difficult to listen in on, remember that high-frequency sound is easy to control with the right materials and placement. Small changes can result in a significantly softer and more pleasant sound environment!

Products that are good for absorbing high-frequency sound

High-frequency sounds can be disruptive and create discomfort in environments such as offices, restaurants, schools, and industrial spaces. By using effective sound absorbers, specially adapted for high-frequency sounds, you can reduce reverberation, echoes, and unwanted sound reflections, creating a more comfortable and productive sound environment. Here we present our best products for absorbing high-frequency sounds.

SilentDirect PES Ceiling
SilentDirect PES Ceiling is a high-performance sound absorber developed to effectively absorb high-frequency sounds and reduce reverberation. With a thickness of 50 mm, it effectively absorbs sound waves before they are reflected further into the room. The product is made from at least 50% recycled polyester, free from adhesives and binders, and does not emit any fibers that can cause irritation. It is safe to use in all indoor environments and is easily installed on ceilings using the included brackets, making it a convenient choice for both small and large rooms where high-frequency sound is a problem.

SilentDirect PES Ceiling Fabric
SilentDirect PES Ceiling Fabric combines excellent absorption of high-frequency sounds with a stylish fabric-covered surface, perfect for environments where design and aesthetics are important. The product is 50 mm thick, effectively absorbs high-frequency sound waves, and reduces reverberation. Made from at least 50% recycled polyester without binders or adhesives, ensuring a healthy indoor environment. SilentDirect PES Ceiling Fabric is easily installed with brackets and is ideal for both public and private spaces.

SilentDirect PES Wall
SilentDirect PES Wall is specially designed to absorb high-frequency sounds and reduce disturbing echoes and sound reflections in the room. It is made from environmentally friendly polyester (at least 50% recycled material), free from adhesives and binders, and is safe to use in all environments. With a thickness of 50 mm, SilentDirect PES Wall offers high sound absorption and is easy to install. Installation is easy with either brackets or concealed keyhole fasteners on the back for a discreet and professional installation.

SilentDirect PES Wall Fabric
SilentDirect PES Wall Fabric combines effective absorption of high-frequency sounds with a stylish fabric-covered surface. It is an ideal choice for places where an aesthetic solution is as important as sound absorption. The product effectively absorbs high-frequency sound waves, improving the sound environment and reducing reverberation and echoes. The 50 mm thick construction of recycled polyester ensures environmental friendliness and durability. Installation is quick and easy with brackets or discreet, concealed keyhole fasteners on the back.

SilentDirect Wall
SilentDirect Wall is an exclusive sound absorber specially developed for effective absorption of high-frequency sounds. This premium product is available in several different sizes and can also be obtained in multi-part designs – ranging from 3-part to 5-part – making it easy to adapt to the specific needs of the room. The absorber is available in different thicknesses (20 mm, 40 mm, and 60 mm), with the thicker versions absorbing high-frequency sounds even more effectively. SilentDirect Wall is hand-built in Skåne and consists of a sturdy MDF frame, a sound-absorbing core of recycled polyester, and an elegant fabric cover that is available in several colors. Installation is easy thanks to CNC-milled keyhole fasteners, which ensure stable and professional mounting. The product thus combines high functionality, stylish design, and flexibility, perfect for environments with disruptive high-frequency sounds.

SilentDirect Egg
SilentDirect Egg is an advanced sound absorber made of NBR rubber (nitrile rubber), a material known for its exceptional sound-absorbing properties. Its egg-shaped structure is specially designed to effectively absorb high-frequency sounds and minimize reflections. By mounting SilentDirect Egg on walls or ceilings, you can quickly and effectively reduce disruptive noise levels and create a more comfortable sound environment. For optimal effect, a thickness of at least 35 mm is recommended, while 50 mm provides even better absorption of high-frequency sounds.

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Absorb high-frequency sound – For a pleasant and stress-free sound environment

High-frequency sounds can quickly make the sound environment in offices, restaurants, homes, and public spaces stressful and unpleasant. These are often sounds such as conversations, ringing phones, clattering cutlery, glasses, or echoes from keyboards. These sounds are easily reflected off hard surfaces such as glass, concrete, and tile, creating a sharp, echoing, and stressful sound environment. To increase well-being, concentration, and comfort, it is therefore crucial to absorb these high-frequency sounds in the right way.

Why is high-frequency sound a problem?

When high-frequency sounds are reflected in a room, it creates an unclear sound environment, where conversations become difficult to hear and concentration is impaired. Sounds from conversations, telephones, keyboards, and cutlery clattering in restaurants can feel particularly intrusive and contribute to stress and irritation. In work environments such as open-plan offices and meeting rooms, this can lead to reduced productivity and fatigue among employees.

Effective methods for absorbing high-frequency sound

To effectively absorb high-frequency sound, materials with good acoustic properties are needed that can convert sound energy into heat. Soft and porous materials, such as acoustic panels made of polyester fiber or mineral wool, are particularly effective because they absorb sound waves instead of allowing them to bounce off.

A successful strategy is to place sound absorbers where the sound is most reflected, for example, on ceilings and wall surfaces opposite large windows, concrete walls, or tiled surfaces. Ceiling absorbers are often the first and most effective measure, as the ceiling surface is large and rarely disturbed by interior design or furniture.

Optimal placement of sound absorbers

For the best possible results, sound absorbers should be strategically placed close to the sound sources. In restaurants and cafés, sound absorption is recommended directly above dining areas and around serving areas. In office environments, absorbers can be installed close to workstations, in meeting rooms, and in corridors to improve speech intelligibility and reduce background noise such as conversations and keyboard sounds.

Feel free to combine sound absorbers of different thicknesses and materials to effectively cover a wide frequency range. Curtains, carpets, and other soft textiles work well as complements to further dampen sound reflections.

All environments benefit from good sound absorption

High-frequency sound absorption is a solution that is suitable for a wide variety of environments. In addition to offices and restaurants, it is ideal in schools, preschools, libraries, and healthcare facilities, where a quiet sound environment is particularly important for learning, concentration, and well-being. Even home environments, especially kitchens, dining rooms, or living rooms with very hard surfaces, can benefit greatly from sound-absorbing materials.

By investing in effective high-frequency sound absorption, you can create a calmer, more harmonious, and pleasant environment. You reduce stress levels and improve comfort for everyone in the room.

Summary – Why high-frequency sound absorption is important

To create an acoustically pleasant environment and reduce disturbing echoes and reflections from high-frequency sounds, you should use sound absorbers in strategic locations in your space. By choosing the right materials and placing them carefully, you can significantly improve the acoustics, leading to increased comfort, better concentration, and reduced stress. Whether you need to improve the sound environment in an office, restaurant, home, or public space, high-frequency sound absorption is an effective and long-term investment in well-being and productivity.