Patents by Inventor Moritz Spaeh

Moritz Spaeh has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Anechoic room for the entire auditory range
    Patent number: 6073722
    Abstract: A low reverberating room for the entire auditory range. In particular, for ow frequency ranges below 100 Hz, in which the walls and ceiling are covered with sound absorbers. The sound absorbers on a surface of about 70-90% of a room, not including the floor, have a depth of <0.5 m preferably <0.3. The sound absorber also has a closed, plane but acoustically permeable surface, are built up of multiple layers. The sound absorbers are about 20-70% in similarity to composite-plate resonators. They are also provided with inside plates, made of metal or heavy foil, which are designed of varying thickness for absorption in various frequency ranges.
    Type: Grant
    Filed: September 4, 1998
    Date of Patent: June 13, 2000
    Assignee: Fraunhofer Gesellschaft zur Foerderung der angewandten Forschung E.v.
    Inventors: Gerhard Babuke, Dietmar Eckoldt, Helmut Fuchs, Moritz Spaeh, Xueqin Zha