Defining noise sources
A combined heat and power unit, for example, has at least five different noise sources to consider, each requiring its own assessment.
From defining the noise sources to verifying success by measurement: noise control solutions optimised economically and structurally.
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We design the measure that meets the guideline value and, after implementation, verify by measurement that it does. It starts with a complete survey of the sources. A technical installation usually has several, each with its own spectrum, its own share of the overall level and its own reduction potential.
Enclosures and silencers are covered by DIN EN ISO 15667 and 14163. We calculate outdoor screening according to DIN ISO 9613-2 and sound radiation from buildings according to VDI 2571; in building construction, DIN 4109 applies. The framework is set by BImSchG and TA Lärm with the state of the art in noise reduction.
You receive the achievable level reduction for each variant, a comparison of effort and effect, and the control measurement after construction. This way, what has been achieved is not just planned but proven.
A combined heat and power unit, for example, has at least five different noise sources to consider, each requiring its own assessment.
Before construction: calculating variants with the latest software and technical data. For existing installations: emission measurements directly at the installation.
We check the effectiveness of implemented measures through precise measurement checks.
Required measures are evaluated in terms of effort versus reduction potential.
Not all noise travels through the air. A rigidly bolted machine passes its vibrations directly into the structure, the floor slab vibrates with it and radiates the sound into the room below. You hear the machine even though there is concrete in between.
Elastic mounts, essentially springs, are placed between the machine and the slab. Machine and springs together then bounce at their own slow rate, here five times per second.
What matters is how fast the machine runs compared with this rate. If both are equally fast, everything builds up and it gets louder rather than quieter. Only when the machine runs considerably faster than the springs bounce do the mounts isolate.
The machine runs five times faster than the mounting bounces. It is therefore safely in the isolating range and the slab stays quiet. After installation, we measure again: planned is not the same as achieved.
Designs screening, enclosures and decoupling and subsequently verifies their effect by measurement.