(19)
(11) EP 2 747 075 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
22.06.2016 Bulletin 2016/25

(43) Date of publication A2:
25.06.2014 Bulletin 2014/26

(21) Application number: 13196126.0

(22) Date of filing: 06.12.2013
(51) International Patent Classification (IPC): 
G10K 11/178(2006.01)
(84) Designated Contracting States:
AL 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 RS SE SI SK SM TR
Designated Extension States:
BA ME

(30) Priority: 21.12.2012 US 201213725257

(71) Applicant: Intermec IP Corp.
Everett, WA 98203-1264 (US)

(72) Inventors:
  • Liu, Zhiyong
    556741 Singapore (SG)
  • Tong, Ter Liang
    556741 Singapore (SG)

(74) Representative: Houghton, Mark Phillip 
Patent Outsourcing Limited 1 King Street
Bakewell, Derbyshire DE45 1DZ
Bakewell, Derbyshire DE45 1DZ (GB)

   


(54) Closed-loop active noise reduction system, such as for a thermal printer


(57) A system and method for reduce noise emitted by a printer are disclosed herein. In one embodiment, a sound detector (404) disposed proximate to a noise source (402) detects a measured noise signal, which is analyzed (410) to determine one or more resonant frequencies thereof. A feedback signal is determined (414) based on the analyzed noise signal and is used to generate (416) a compensated signal 180 degrees out of phase with the feedback signal. The compensated signal is output (420) proximate to the noise source.







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