EP 1142444 B1 20031015 - PASSIVE MICROPHONE WITH WIRELESS TRANSMISSION
Title (en)
PASSIVE MICROPHONE WITH WIRELESS TRANSMISSION
Title (de)
PASSIVES MIKROFON MIT DRAHTLOSER ÜBERTRAGUNG
Title (fr)
MICROPHONE PASSIF A TRANSFERT SANS FIL
Publication
Application
Priority
- DE 9902524 W 19990812
- DE 19900633 A 19990111
Abstract (en)
[origin: WO0042813A1] The invention relates to a passive microphone (1) for wireless transmission of acoustic data to a receiver unit (6), comprising a piezoelectric device (4) for receiving and storing excitation energy of the receiver unit (6) and for wireless transmission of detected acoustic signals converted into electrical signals to the receiver unit (6). The inventive microphone (1) is configured as a passive component, i.e. without its own energy supply. Said embodiment enables a light-weight and robust construction and provides considerable advantages especially for telephone applications.
IPC 1-7
IPC 8 full level
H04R 1/04 (2006.01); H04R 17/02 (2006.01)
CPC (source: EP)
H04R 17/02 (2013.01)
Citation (examination)
CH 664659 A5 19880315 - MEISTER ERWIN, et al
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
WO 0042813 A1 20000720; DE 59907398 D1 20031120; EP 1142444 A1 20011010; EP 1142444 B1 20031015
DOCDB simple family (application)
DE 9902524 W 19990812; DE 59907398 T 19990812; EP 99952376 A 19990812