Patent · US Active

Apparatus using missing fundamental frequencies to improve loudspeaker sound focusing

US9191743B2 · kind B2 · utility

0Cited by

3References

14Claims

0Family size

Assignee

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

Inventor

Daniel Beer · Martinroda, DE

Key dates

Filing date	Feb 26, 2009
Grant date	Nov 17, 2015
Priority date	—
Expiry date	Apr 30, 2032

Classification

Technology area (CPC H)Electricity
CPC primaryH04R2430/20
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

An apparatus for processing an audio signal to focus an acoustic signal by an arrangement of a plurality of loudspeakers comprises a frequency analyzer, a signal processor and a signal output interface. The acoustic signal is based on the audio signal. The frequency analyzer is configured to determine a fundamental frequency in a frequency spectrum of the audio signal depending on a geometry parameter of the arrangement of the plurality of loudspeakers. The signal processor is configured to adapt an overtone of the fundamental frequency to obtain the processed audio signal and the signal output interface is configured to output the processed audio signal to the plurality of loudspeakers.

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