Daimler DBL 5972 Single Layer Acoustic Insulation Materials

In the DBL 5972 standard developed by Daimler automobile company, which is a global German automobile company and owner of the Mercedes-Benz brand, requirements for single-layer plastic film-based insulation materials (plastic films), for example flat and molded parts to dampen airborne noise or structure-borne noise is explained.

Noise has become one of the biggest environmental problems of the age. In vehicles, there is almost nothing that disturbs as much as noise. Although the acoustic insulation in the building elements is good, the disturbing sounds inside the vehicle can greatly impair the quality of life. It is therefore important that noise protection measures are consistently planned and properly implemented when cars are manufactured.

The main materials used in acoustic insulation for the automotive sector are composite materials and polyurethane. Regarding polyurethane, the parts are made entirely from polyurethane foam alone or combined with other materials such as rubber, phenolic and polyspan, among others. The most widely used type of polyurethane foam is the highly durable flexible foam.

In general, acoustic barriers, which are molded parts, are used in the automotive industry to isolate the passenger compartment as acoustically as possible.

For the single-layer sound insulation process, first of all, the analysis and measurements of the environment to be isolated must be done correctly. Afterwards, suitable acoustic insulation materials are applied to the part containing noise.

Generally used acoustic insulation materials are acoustic sponge, fireproof acoustic sponge, rubber and cork based plates, sound insulation mat and sound barriers. Acoustic sound insulation materials are used as sound absorbing materials in sound insulation applications. Acoustic panels, which prevent echo and ringing in the environment, absorb low and high frequency sounds and play an effective role in sound insulation applications. Sound insulation materials used for the floor are different from the sound insulation materials used for ceiling and wall sound insulation. On the floor, thinner and higher density materials such as rubber are generally preferred.

Our organization also provides testing services for single-layer acoustic insulation materials within the scope of Daimler DBL 5972 standard, with its trained and expert staff and advanced technological equipment, among the numerous test, measurement, analysis and evaluation studies it provides for businesses in various sectors.