Patent · US Active

Indoor communication system for a vehicular cabin

US8081776B2 · kind B2 · utility

12Cited by

15References

33Claims

0Family size

Assignee

HARMAN BECKER AUTOMOTIVE SYSTEMS GMBH · DE

Inventors

Tim Haulick · Blaubeuren, DE
Gerhard Uwe Schmidt · Ulm, DE

Key dates

Filing date	Apr 29, 2005
Grant date	Dec 20, 2011
Priority date	—
Expiry date	Jun 23, 2029

Classification

Technology area (CPC H)Electricity
CPC primaryH04R2499/13
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A system automatically determines an equalizing filter characteristic for a communication system within a vehicle. The communication system includes a loudspeaker and a microphone or microphone array. The system transmits a predetermined test signal through the loudspeaker and receive the test signal through the microphone or microphone array. Based on the predetermined test signal and the received test signal, a transfer function is developed. The equalizing filter characteristic is then developed from the transfer function.

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