Testing | Checking | Measuring

The building acoustics test laboratory is recognized by the German Institute for Building Technology (DIBt) as an approved Group I testing center authorized to carry out the full range of performance and quality tests according to DIN 4109.

The acoustic camera uses an array of microphones to precisely localize sound sources. The sounds emitted by a source are recorded by several microphones. The differences in the time of arrival of the incoming sounds (phase position) can be used to draw conclusions about their location and intensity. A color noise map created from these signals is optically superimposed on the photo or video of the object under investigation.

In our specialized testing facility, we can determine the noise level Lap in accordance with DIN EN ISO 3822. The noise generated by sanitary taps, fittings, valves and other water installation devices is recorded in detail, transmitted via a standardized measuring setup in our measuring lab and then compared with the noise level generated by the installation noise standard (IGN).

The semi-anechoic chamber with all-wheel drive chassis dynamometer at Fraunhofer IBP provides a state-of-the-art environment for conducting detailed acoustic tests on vehicles. This testing facility makes it possible to realistically simulate driving conditions for cars, vans and motorcycles in order to accurately measure both interior and exterior noise. Among other tests, we use the facility to carry out simulated pass-by noise tests according to ISO 362-3 and UN-ECE R51, in which the exterior noise is measured at a defined distance. In addition to a Safety-Walk™ surface, rough asphalt surface elements or impact bars can be installed. Thanks to a versatile pallet changing system, vehicles can be efficiently prepared for decoupling studies, for example, or to mount sensors. The facility also boasts a fully-equipped workshop with lifting platforms, tire fitting and wheel balancing stations, as well as a fast-charging station for electric vehicles.

Measuring sound absorption in the impedance tube offers manufacturers and users of absorber materials the opportunity to test their products under standardized conditions. Besides the absorption coefficient, impedance is also measured in order to obtain detailed information about the material. Since only small-sized samples are needed, this method is particularly suitable for developing and optimizing new materials. In addition, fully-developed products can be certified in accordance with DIN EN ISO 10534-2.

Our state-of-the-art testing facilities at Fraunhofer IBP are specially designed to provide advanced solutions in silencer and component testing. We perform standardized measurements in compliance with DIN EN ISO 7235 to precisely analyze the insertion loss, sound power and pressure losses of your products. Equipped with both rectangular and round test tunnels, our facilities enable us to carry out comprehensive tests on silencers and other components used in ventilation and process air systems. The tests we carry out ensure that your products are developed with the highest quality and efficiency, so you can be certain that your solutions meet the strictest international standards.

An environment with room acoustics optimized to reduce reflection is used to simulate the acoustic conditions of a free field above a reflecting plane. Such a room is classified as a semi-anechoic chamber. This environment can be used to perform highly accurate measurements of the radiated sound power from sound sources, as well as their directional characteristics. An acoustic free field is distinguished by the fact that the sound pressure level decreases proportionally with increasing distance from the sound source. This condition is achieved by lining walls and ceilings with special sound-absorbing materials, such as flat absorbers (industry) or wedge absorbers, as in this room. The chamber is about 20 meters long, which allows measurements of sound propagation over obstacles to be performed. Typical tasks include the measurement of sound diffraction or sound shielding via barriers, such as noise barriers, as well as the scattering or absorption of sound by acoustically relevant surfaces.

At Fraunhofer IBP in the Acoustic Department's acoustically optimized semi-anechoic chamber, you have the opportunity to carry out precise sound measurements under optimal conditions. This chamber simulates the acoustic conditions of a free field above a reflecting plane and makes it possible to accurately determine the radiated sound power and directional characteristics of sound sources. Thanks to the special sound-absorbing materials that line the walls and ceilings, reflections are minimized, and an authentic free field is created.

Our anechoic chamber is a state-of-the-art testing facility specially designed for carrying out precise acoustic measurements. Thanks to the acoustically optimized environment, which corresponds to the conditions of a free field, we can analyze sound sources with the highest accuracy. The walls and ceilings of the chamber are lined with special sound-absorbing materials such as wedge absorbers, which almost completely eliminate reflections. This enables sound power and directional characteristics to be precisely determined in accordance with the DIN EN ISO 3745 standard.

Our two acoustic semi-anechoic chambers provide optimal conditions for conducting precise sound measurements. In the first chamber, specially designed for measuring sound power and directional characteristics, you benefit from an environment that is acoustically optimized to simulate the conditions of a free field. The second chamber is also temperature-resistant, making it particularly advantageous when it comes to measuring the noise generated by heat pumps and air-conditioning units. This adaptability makes it possible to test acoustic performance under different climatic conditions, ensuring realistic and practical results.