continued from part 1 - Controller General of Patents, Designs, and ...

(12) PATENT APPLICATION PUBLICATION (21) Application No.6618/DELNP/2008 A
(19) INDIA
(22) Date of filing of Application :30/07/2008 (43) Publication Date : 24/10/2008
(54) Title of the invention : AMBIENT NOISE REDUCTION ARRANGEMENTS
(51) International classification :G10K 11/178 (71)Name of Applicant :
(31) Priority Document No :0601536.6
1)WOLFSON MICROELECTRONICS PLC
(32) Priority Date :26/01/2006
Address of Applicant :WESTFIELD HOUSE, 26
(33) Name of priority country :U.K.
WESTFIELD ROAD, EDINBURGH, EH11 2QB, U.K U.K.
(86) International Application No :PCT/GB2007/000120 (72)Name of Inventor :
Filing Date
:17/01/2007
1)SIBBALD, ALASTAIR
(87) International Publication No :WO 2007/085796
(61) Patent of Addition to Application
Number
Filing Date
:NA
:NA
(62) Divisional to Application Number :NA
Filing Date
:NA
(57) Abstract :
A feedforward ambient noise reduction arrangement (10) includes, within a housing, a loudspeaker device for directing sound energy
into an ear of a listener. Disposed externally of the housing, and positioned to sense ambient noise on its way to the listener's ear, are
plural microphone devices (21-15) capable of converting the sensed ambient noise into electrical signals for application to the
loudspeaker to generate an acoustic signal opposing the ambient noise. Importantly, the overall arrangement is such that the acoustic
signal is generated by said loudspeaker means in substantial time alignment with the arrival of said ambient noise at the listener's ear.
No. of Pages : 52 No. of Claims : 22
The Patent Office Journal 24/10/2008 26222