Hamburg, Germany (February 7, 2012)—A total of 16 Adamson B-118 subwoofers are aiding researchers as they test cabin acoustics and noise-cancellation technologies.
The professorship of Mechatronics at the Helmut-Schmidt University / University of the German Federal Armed Forces, headed by Univ.-Prof. Dr.-Ing. Delf Sachau, is experimenting with the new sound reinforcement system, projected and installed by Adamson Europe’s Jochen Sommer, in cooperation with Dr.-Ing. Oliver Pabst and Dipl.-Ing. Kai Simanowski.
It will be used as the primary sound projection source with an aircraft passenger cabin model. This experimental speaker rig will be used for studying the effects of noise emissions of the controversial propfan engines inside of the cabin, and the effectiveness of active noise cancelling measures. The B-118 subs are utilized to re-create a specific acoustic signature of the engine at realistic sound pressure levels.
The B118 employs a single AW18 driver, which has reportedly the World’s first 18″ woven Kevlar diaphragm driver. According to Adamson, Kevlar virtually eliminates the effects of cone fatigue while providing long-term reliability. The 16 units of B-118 subs are powered by two Lab.gruppen C48:4 amplifiers and controlled by a single Xilica XA-2040 processor.
“The Adamson speakers met our specifications and demands in terms of output, reliability, and acoustic focusing. Further positive effects of the controlled low frequency radiation are greater energy efficiency, and reduced spill towards neighboring test rigs. Flexibility and control of this system offers new possibilities for our acoustic research projects.” Dipl.-Ing. Kai Simanoswki concluded.
Adamson Systems Engineering