The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 11, 2009
Filed:
Nov. 16, 2005
Fredrik Gustafsson, Linköping, SE;
Fredrik Gustafsson, Linköping, SE;
Softube AB, Linkoping, SE;
Abstract
The invention describes an apparatus for software or hardware emulation of acoustic feedback effects. The invention comprises an analog to digital interface () for the input, whose output is summed () with a feedback of this digital signal passing through an amplifier model (), a room acoustics model () and a string model (). The summed signal () is converted from digital to analog () and can then be connected to a standard amplifier. The room acoustic model comprises a volume control () where the degree of feedback is controlled, while the string model contains a model () of which harmonics to feed back, and finally an algorithm () that decides which fundamental frequencies that the incoming digital signal contains.