EP 2259250 A1 20101208 - Hybrid active noise reduction device for reducing environmental noise, method for determining an operational parameter of a hybrid active noise reduction device, and program element
Title (en)
Hybrid active noise reduction device for reducing environmental noise, method for determining an operational parameter of a hybrid active noise reduction device, and program element
Title (de)
Hybride aktive Rauschminderungsvorrichtung zur Abschwächung von Umgebungsrauschen, Verfahren zum Bestimmen eines Betriebsparameters der hybriden aktiven Rauchminderungsvorrichtung und Programmelement
Title (fr)
Dispositif hybride de réduction active du bruit pour réduire le bruit ambiant, procédé de détermination d'un paramètre opérationnel d'un dispositif hybride de réduction active du bruit et élément de programme
Publication
Application
Priority
EP 09161866 A 20090603
Abstract (en)
A hybrid active noise reduction device for reducing environmental noise is provided, the device (500) comprising a microphone (102) for receiving a noise signal (118) and for transmitting a microphone signal (122), a filter unit (114) for receiving the microphone signal (122) and for transmitting a filtered microphone signal (514), the filter unit (114) comprising an analog filter part (501) and a digital filter part (112), the analog filter part (501) and the digital filter part (112) being arranged in series to one another, and a loudspeaker (110) for transmitting a noise reduction signal (120) based on the filtered microphone signal (514). A bypass line (505) is arranged in parallel to the digital filter part (112) to add the outputs of the analog filter part (501) and the digital filter part (112).
IPC 8 full level
G10K 11/178 (2006.01)
CPC (source: EP US)
G10K 11/17823 (2017.12 - EP US); G10K 11/17855 (2017.12 - EP US); G10K 11/17857 (2017.12 - EP US); G10K 11/17881 (2017.12 - EP US); G10K 11/17885 (2017.12 - EP US)
Citation (applicant)
US 5440642 A 19950808 - DENENBERG JEFFREY N [US], et al
Citation (search report)
- [XI] US 2007098119 A1 20070503 - STOTHERS IAN [GB], et al
- [XA] US 2004240677 A1 20041202 - ONISHI MASAHIDE [JP], et al
- [X] US 2001036283 A1 20011101 - DONALDSON MARK [NZ]
- [X] US 2008112570 A1 20080515 - ASADA KOHEI [JP], et al
- [Y] GB 2222733 A 19900314 - TOPEXPRESS LTD [GB]
- [Y] US 5774564 A 19980630 - EGUCHI MASAKI [JP], et al
- [XI] WO 9407212 A1 19940331 - NOISE CANCELLATION TECH [US], et al
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 TR
DOCDB simple family (publication)
EP 2259250 A1 20101208; WO 2010140133 A2 20101209; WO 2010140133 A3 20110630
DOCDB simple family (application)
EP 09161866 A 20090603; IB 2010052475 W 20100603