Building Materials and Construction Components Design Sound Balance Acoustic Elements by SIGEL GmbH Sound Balance is a system of acoustic elements designed for open-plan offices. The range comprises 34 wall and room elements that absorb sound. Each absorber combines polyester fleece panels of varying densities to reach a high level of sound absorption. The acoustic material offers a higher absorption rating than typical foams and fibres. All Sound Balance elements are certified to Fire Safety Class B2 and use pollutant-free materials. The elements are sturdy and hold securely on the wall. Noise is reduced while a calm visual appearance is kept.