EP 1189482 A1 20020320 - Membrane for optical microphone/sensor
Title (en)
Membrane for optical microphone/sensor
Title (de)
Membran eines optischen Mikrophons bzw. Sensors
Title (fr)
Membrane pour microphone/capteur optique
Publication
Application
Priority
IL 13845900 A 20000914
Abstract (en)
A membrane (2) for an optical microphone/sensor comprises a film of a selected thickness. The film (2) has crinkles forming ripples (6) on at least one of its surfaces, the depths and pitches of the ripples being in the order of the thickness of the film. <IMAGE>
IPC 1-7
IPC 8 full level
H04R 7/14 (2006.01); H04R 23/00 (2006.01)
CPC (source: EP)
H04R 7/14 (2013.01); H04R 23/008 (2013.01)
Citation (search report)
- [YA] GB 2086586 A 19820512 - SETRA SYSTEMS INC
- [Y] US 3247927 A 19660426 - DONALD CRAGG WILLIAM
- [A] GB 749551 A 19560530 - ERIC LIONEL HUTCHINGS
- [Y] PATENT ABSTRACTS OF JAPAN vol. 005, no. 040 (E - 049) 17 March 1981 (1981-03-17)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
EP 1189482 A1 20020320; IL 138459 A0 20011031; JP 2002159095 A 20020531
DOCDB simple family (application)
EP 01302813 A 20010327; IL 13845900 A 20000914; JP 2001280534 A 20010914