EP 0219025 B1 19900613 - HEARING AID
Title (en)
HEARING AID
Publication
Application
Priority
DE 3536881 A 19851016
Abstract (en)
1. A hearing aid, for people with damaged hearing, with a sound pick-up microphone arrangement and earphone between which is connected an arrangement of several voice frequency selecting channels (4 to 9), in which there is provided in each individual voice frequency selecting channel a device (16) for measuring the strength of a signal and a summing element (29) having a positive and at least one negative input, the positive input of the summing element being coupled to the output of the same-channel and the negative input of the summing element being coupled with the output of a measuring device (16) in the adjacent channel, with the differential signal given off by the summing element (29) influencing the amplification in the same channel voice frequency selecting channel.
IPC 1-7
IPC 8 full level
H04R 25/04 (2006.01); H04R 25/00 (2006.01)
CPC (source: EP US)
H04R 25/502 (2013.01 - EP US)
Designated contracting state (EPC)
AT CH DE FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0219025 A1 19870422; EP 0219025 B1 19900613; AT E53735 T1 19900615; DE 3672082 D1 19900719; DK 492186 A 19870417; DK 492186 D0 19861015; JP S6295099 A 19870501; US 5046102 A 19910903
DOCDB simple family (application)
EP 86113800 A 19861006; AT 86113800 T 19861006; DE 3672082 T 19861006; DK 492186 A 19861015; JP 24286786 A 19861013; US 91846886 A 19861014