EP 0466676 A3 19920729 - HEARING AID WITH A DIRECTIVE MICROPHONE HAVING VARIABLE DIRECTIVITY
Title (en)
HEARING AID WITH A DIRECTIVE MICROPHONE HAVING VARIABLE DIRECTIVITY
Publication
Application
Priority
AT 150090 A 19900713
Abstract (en)
[origin: EP0466676A2] A hearing aid for persons hard of hearing, with a directional microphone, the directional characteristic of which can be changed and is automatically controlled as a function of the input or output signal in such a manner that all possible microphone characteristics are adjustable, is implemented in that the directional microphone (10) is an electret microphone and the directional characteristic is changed electrically and continuously. <IMAGE>
IPC 1-7
IPC 8 full level
H04R 1/38 (2006.01); H04R 19/01 (2006.01); H04R 25/00 (2006.01)
CPC (source: EP US)
H04R 1/38 (2013.01 - EP US); H04R 19/016 (2013.01 - EP US); H04R 25/407 (2013.01 - EP US)
Citation (search report)
- [Y] US 3875349 A 19750401 - RUEGG HEINZ
- [Y] DE 1938435 A1 19710211 - SCHOEPS DR ING KARL
- [A] FR 2500248 A1 19820820 - RION CO [JP]
- [A] US 4862278 A 19890829 - DANN LYNN D [US], et al
- [A] US 3876843 A 19750408 - MOEN BRUCE A
Designated contracting state (EPC)
CH DE DK GB IT LI NL
DOCDB simple family (publication)
EP 0466676 A2 19920115; EP 0466676 A3 19920729; EP 0466676 B1 19950308; AT 407815 B 20010625; AT A150090 A 19920815; CA 2046416 A1 19920114; CA 2046416 C 19971202; DE 59104846 D1 19950413; DK 0466676 T3 19950522; US 5214709 A 19930525
DOCDB simple family (application)
EP 91890130 A 19910625; AT 150090 A 19900713; CA 2046416 A 19910705; DE 59104846 T 19910625; DK 91890130 T 19910625; US 72392991 A 19910701