Acoustic system for architects
In today’s method to build it is common to use very hard materials such as stone, tiles, clinkers, concrete and plaster, leads to that the largest part of the noise in the premise reverberates against these surfaces. In such cases the result becomes a noisy premise with poor audibility and acoustics.
The solution is fundamentally the same thing no matter what fields of application the premise has. One has to see to that the disturbing noise absorbs and is prevented to travel around in the room and on to adjacent areas.
Consider the following:
Sounds can be of varying frequencies. The human ear is able to perceive sounds between 20 Hz and 20,000 Hz. The human speech is between 125 Hz and 8,000 Hz. One thing to consider when choosing absorbent is that the absorber should have the capacity to cover the most part of the frequency range. It is also a huge advantage if the absorption capacity is as similar as possible within the various frequencies. In addition, in that way the sound environment is perceived as natural as possible.
To what extent are you prepared to make alterations to your architecture in order to overcome existing sound problems? A change of appearance and architecture is the outcome for the majority of acoustic systems in order to achieve high acoustical performance. If this is of importance to you, you should make sure to choose an acoustic system according to that, since there are alternatives on the market that meets with all these expectations.
Different premises have different areas of use and therefore different requirements on the room acoustics.
Office environment
Optimal audibility is of great importance in office environments, especially in landscaped offices; it is at the same time essential that disturbing sounds are effectively absorbed.
Optimal absorption in the working areas in addition to properly soundproofed walls is here creating a comfortable work environment.
See to that cables for electricity and computers are dimensioned for each and every office’s current and future requirements. Make use of the ceilings in the corridors to place inspection covers to reach installations.
Forum, auditorium, lecture halls etc.
Optimal audibility is the key to an optimal sound environment in these kinds of premises.
The speaker is most often placed at a certain spot in the room. It is then possible to reinforce the early sound reverberations towards the audience by avoiding applying absorbing material to the ceiling in those places that gives a positive spread of the sound. In addition, a short reverberation time is created in the room by applying superior absorption material to the ceiling and if needed, to the walls.
Dining-rooms, restaurants etc..
When the audibility is poor, we raise our voices unconsciously to compensate this. Hence, the sound environment will then become very noisy and it is hard to hear what is being said. Through an optimal sound absorption in ceilings and walls, the noise and the sound-level is effectively reduced at the same time as the audibility enhances.
In most cases the sound absorbent consists of porous materials to be able to catch the energy in the sound waves and then convert it into heat. Since the environment in restaurants and dining-rooms often are exposed to heavy soiling it is of great importance to see to that the acoustical ceiling is antistatic, easy to clean, maintain and repair.
Health care environment
Speech and also sounds from medical equipment are here creating a noisy environment. Optimal sound absorption in the room absorbs sounds and provides a shorter reverberation time and thereby creating inviting spaces. See to that the absorbents perform in the entire frequency spectrum since the sound to be absorbed consists of both low and high frequencies.
Lobbies, stairwells etc.
Do not leave out the acoustics in these spaces. Extended reverberation times are most often experienced as disturbing in lobbies and stairwells.
It is common that old buildings have magnificent lobbies and stairwells made of stone, marble, vaults and sometimes stucco. In those cases it is recommended to choose an acoustic solution that allows maintaining existing appearance when it comes to shape, surface structure and colour. With a low construction height on the acoustic system it is in most cases possible to connect to existing stucco.
About acoustics
For a person who is not familiar with the whole concept of acoustics it is jungle of technical terms, methods of measurement and standards. That is why we have chosen to leave that out and instead move on to what is of more interest. This is the way it is: High-frequent sounds such as shouting, rattling and scrapings, and sounds from high heels on a parquet floor, are fairly easy to attenuate. All products on the market are able to attenuate these sounds, or you could go ahead and do it yourself. It is just to put a carpet in the ceiling and the problem is solved. The real challenge to sound absorptive materials are low-frequent sounds such as dark voices, muffled footsteps, distant traffic sounds and continuous sounds such as buzzing fans. Some products on the market are able to handle this with reasonable results; however, the problem is that these installations require a very large construction height which is most often not possible due to technical reasons.
Fellert Acoustic System
Fellert Acoustic System is unique in reference to that it manages to absorb sounds in the lower frequencies without the need of an underlying air gap. The construction height will then only measure a few centimetres. Fellert has in spite of its low construction height clearly the best test values in these low, difficult frequencies. You can download a test measuring in the right-hand column.
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