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In order for a room acoustic measure to be calculated and assessed realistically, well-founded acoustic physical basic knowledge and practical experience is appropriate. In particular, the initial values of reality must be determined accordingly. For sensitive areas, the measurement should be carried out professionally by an acoustic expert. Alternatively, at least a provisional measurement should be performed with a phone app repeatedly. The provisional measurement serves only as a guideline for the selection of the room materials and their absorption coefficients in the acoustic calculator. Basically, any calculation without professional measurements of the initial situation is hypothetical!

Example:

Low frequencies are absorbed differently than high frequencies. Glass surfaces (Windows) or a normal office cabinet made of chipboard in different thicknesses, when you hit the resonance of the deep tones, can act for the low frequencies absorbing. However, a correct calculation is hardly possible due to the lack of measured data of the objects. On the basis of a measurement, special depth absorbers (vibrating resonators) need to be specifically set.

The calculations are based on measured data from objects and materials. Some of these are listed in the DIN 18041 exemplary. Others are taken from various sources for their correctness and conformity with the actual existing object or material there is no guarantee.

• Area is important-small elements, for example, are simply overlooked by lower frequencies due to the long wavelength. Even with a-class absorbers, an adequately large absorbing surface is required in relation to the size of the room. In communication rooms, absorbers on the ceiling are sparingly and consciously dealt with. Here is more of a reflection desired!

Each conference room is a representation of distinctive style and vision utilizing systems from the Circon Executive Product Line. Size, form and material/composition are developed according to individual customer needs and demands.

Various table styles are possible. Elliptical, Oval and Boat-form with elliptical feet sections can be realized in chrome, aluriffel or painted. All table sizes are feasible. The Oval-Office Project in Hamburg is a successful example where an oval 11,6 m- long table veneered in Swiss pear tree was designed to accomodate 38 persons in their executive suite conference room.

An echo makes the use of the festival hall of the youth welfare Waldhaus / Waldhausschule in Malsch almost impossible. The echo, or the sound reflections were so high that one could understand nothing more.

How should one get together and make music here? It was impossible!

But there is some help coming: the EnBW #MacherBus not only financially supports Waldhaus Jugendhilfe with the acquisition of new sound-absorbing elements, but the EnBW makers also undertake the attachment of the elements. With the new room acoustics measure the children of the Waldhausschule can use the hall again in peace and quiet.

Vital-Office also supported this project, supplied the vitAcoustic Frames for optimum sound absorption and led the assembly.

Links:
https://www.enbw.com/wir-machen-das-schon/aktionen/macher-bus/der-enbw-macher-bus-in-malsch/index.html
http://www.jh-waldhaus.de/Aktuelles-Reader/items/projekt-echo-durch-macher-der-enbw-erfolgreich-bewaeltigt.html