(19)
(11) EP 1 489 883 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
15.06.2005 Bulletin 2005/24

(43) Date of publication A2:
22.12.2004 Bulletin 2004/52

(21) Application number: 04010368.1

(22) Date of filing: 30.04.2004
(51) International Patent Classification (IPC)7: H04R 25/00
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL HR LT LV MK

(71) Applicant: PHONAK AG
8712 Stäfa (CH)

(72) Inventor:
  • Roeck, Hans-Ueli
    8634 Hombrechtikon (CH)

(74) Representative: Troesch Scheidegger Werner AG 
Schwäntenmos 14
8126 Zumikon
8126 Zumikon (CH)

   


(54) Automatic microphone matching


(57) Matching of at least two acoustical to electrical converters is performed in dependency of an impinging direction of arrival within a range determined before matching. The two acoustical to electrical converters provide as an example beamforming ability for a cardoid transfer characteristic (c). Matching of the two acoustical/electrical converters involved is performed whenever direction of arrival (DOA) of acoustical signals impinging on the converter is within a range DOAS±ΔDOA. Such range is selected around a direction of arrival where e.g. the transfer characteristic is zero (d).






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