Anechoic room for the entire auditory range

US6073722A · kind A · utility

Assignee

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Gerhard Babuke · Weil der Stadt, DE
• Dietmar Eckoldt · Deufringen, DE
• Helmut Fuchs · Hall in Tirol, AT
• Moritz Spaeh · Schwäbisch Gmünd, DE
• Xueqin Zha · Eppelheim, DE

Key dates

• Filing date: Sep 4, 1998
• Grant date: Jun 13, 2000
• Expiry date: Sep 4, 2018

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E04B2001/8461
• WIPO field: Civil engineering
• WIPO sector: Other fields

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.