Patent · US Active

Apparatus and method of determining an impulse response and apparatus and method of presenting an audio piece

US7881485B2 · kind B2 · utility

3Cited by

7References

21Claims

0Family size

Assignee

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

Inventors

Thomas Sporer · Ergolding, DE
Christian Neubauer · Nuremberg, DE

Key dates

Filing date	May 13, 2005
Grant date	Feb 1, 2011
Priority date	—
Expiry date	Dec 12, 2028

Classification

Technology area (CPC H)Electricity
CPC primaryH04S2420/13
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

The apparatus for determining an impulse response in an environment in which a speaker and a microphone are placed works using an audio signal. Means for spectrally coloring a test signal, which preferably is a pseudonoise signal, works using a psychoacoustic masking threshold of the audio signal to obtain a colored test signal, which is embedded in the audio signal to obtain a measuring signal, which can be fed to the speaker. Means for determining the impulse response preferably performs a cross-correlation of a reaction signal received via the microphone from the environment and the test signal or the colored test signal. With this, an impulse response of an environment may also be determined during the presentation of an audio piece to provide an optimal description of environment for a wave-field synthesis.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.