(19)
(11) EP 0 802 699 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
25.02.1998 Bulletin 1998/09

(43) Date of publication A2:
22.10.1997 Bulletin 1997/43

(21) Application number: 97112125.6

(22) Date of filing: 16.07.1997
(51) International Patent Classification (IPC)6: H04R 1/00
(84) Designated Contracting States:
AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

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

(72) Inventor:
  • Maisano, Joseph
    2003 Neuchâtel (CH)

(74) Representative: Troesch Scheidegger Werner AG 
Patentanwälte, Siewerdtstrasse 95, Postfach
8050 Zürich
8050 Zürich (CH)

   


(54) Method for electronically enlarging the distance between two acoustical/electrical transducers and hearing aid apparatus


(57) For beam forming acoustical signals the phase difference of the output signals of two acoustical/electrical transducers is determined (27) and is multiplied by a factor (30). One of the two output signals of the at least two transducers is phase shifted by an amount according to the multiplication result. This phase shifted signal and the signal of the second transducer are led to a signal processing unit, wherein beam forming on these at least two signals is performed. Thereby, it becomes possible to perform beam forming as if the transducers were mutually distant by more than they physically are.






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