| PREFORM GMBH Patent applications |
| Patent application number | Title | Published |
|---|
| 20110211721 | ADAPTIVE NOISE GENERATING DEVICE - An acoustic adaptive noise generating device in the form of a flat panel loudspeaker is suitable for increasing people's powers of concentration in acoustically difficult surroundings. The adaptive noise generating device includes a carrier panel, an actuator arranged on the carrier panel. A control device is connected to the actuator and permits adjustment of noise signals emitted by the actuator. | 09-01-2011 |
| 20110057144 | SOUND-ABSORBENT FOAM SYSTEM - The present invention relates to a novel sound-absorbent foam system in the form of an open-cell mineral-organic material, which can even attain building material class B1 according to DIN 1402 and is used for reducing sound levels, in particular in interior spaces. The material is distinguished by containing lignosulphonate. | 03-10-2011 |
