EP 2384023 A1 20111102 - Using a loudspeaker as a vibration sensor
Title (en)
Using a loudspeaker as a vibration sensor
Title (de)
Verwendung eines Lautsprechers als Schwingungssensor
Title (fr)
Utilisation de haut-parleur en tant que capteur de vibrations
Publication
Application
Priority
EP 10161313 A 20100428
Abstract (en)
The invention relates to a communication system having a first operational mode and a second operational mode, at least one of which is used for communication purposes. The system comprises: i) an incoming signal terminal (IN) for receiving an incoming signal (Rx) that is representative for incoming communication or sound that needs to be reproduced by the system; ii) a first terminal (T1) for receiving an acoustic signal (ACS); iii) a second terminal (T2) for receiving a noise reference signal (NR) in the second operational mode; iv) a noise-cancellation unit (AEC/NS) coupled to the first terminal (T1) and the second terminal (T2) for reducing a noise level of the acoustic signal (ACS) to obtain an enhanced acoustic signal for outgoing communication (Tx), and v) a plurality of loudspeakers (LSP1, LSP2, LSP3, LSP4), wherein at least part of the plurality of loudspeakers is coupled to the incoming signal terminal (IN) for producing sound that is representative for the incoming signal (Rx). The communication system is further configured for i) producing the sound with a first respective one (LSP4) of the plurality of loudspeakers in the first operational mode, the communication system being further configured for ii) sensing back-ground noise with the first respective one (LSP4) of the plurality of loudspeakers in the second operational mode to obtain the noise reference signal (NR) that is coupled to the second terminal (T2). The advantage of the proposed invention is to have the benefits of a vibration sensor for acoustic echo cancellation and/or noise suppression, without having to actually integrate such a vibration sensor into the system, but to use hardware (a loudspeaker) that is already available in many cases.
IPC 8 full level
H04R 3/00 (2006.01)
CPC (source: EP)
H04R 3/00 (2013.01); H04R 2410/05 (2013.01); H04R 2499/13 (2013.01)
Citation (applicant)
- EP 1879180 B1 20090506 - HARMAN BECKER AUTOMOTIVE SYS [DE]
- US 5917921 A 19990629 - SASAKI TOORU [JP], et al
- US 2005063553 A1 20050324 - OZAWA KAZUHIKO [JP]
- S.F. BOLL: "Suppression of acoustic noise in speech using spectral subtraction", IEEE TRANS. ON ASSP, ASSP, vol. 27, no. 2, 1979, pages 113 - 120
Citation (search report)
- [I] WO 2004091254 A2 20041021 - PHILIPS INTELLECTUAL PROPERTY [DE], et al
- [I] EP 0898441 A2 19990224 - BOSCH GMBH ROBERT [DE]
- [I] WO 9411953 A2 19940526 - NOISE BUSTER TECHNOLOGY [AU], et al
- [I] DE 4303921 A1 19940811 - BAYERISCHE MOTOREN WERKE AG [DE]
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
Designated extension state (EPC)
AL BA ME RS
DOCDB simple family (publication)
DOCDB simple family (application)
EP 10161313 A 20100428