EP 0643880 A1 19950322 - ACTIVE/PASSIVE HEADSET WITH SPEECH FILTER.
Title (en)
ACTIVE/PASSIVE HEADSET WITH SPEECH FILTER.
Title (de)
AKTIVER/PASSIVER KOPFHÖRER MIT SPRACHFILTER.
Title (fr)
CASQUE D'ECOUTE ACTIF/PASSIF A FILTRE VOCAL.
Publication
Application
Priority
- CA 2136951 A 19920605
- US 9204568 W 19920605
Abstract (en)
[origin: CA2136951A1] 2136951 9326085 PCTABS00028 An active/passive headset with a speech filter characterized by a controller (20) processing speech, noise and warning signals input from microphones (14) on closed back muffs (20) and providing an anti-noise output by a digital virtual earth or adaptive feedforward algorithm to speakers (12) adjacent a user's ear.
IPC 1-7
IPC 8 full level
A61F 11/14 (2006.01); G10K 11/178 (2006.01)
CPC (source: EP US)
A61F 11/145 (2022.01 - EP); G10K 11/17837 (2017.12 - EP US); G10K 11/17854 (2017.12 - EP US); G10K 11/17861 (2017.12 - EP US); G10K 11/17881 (2017.12 - EP US); G10K 2210/108 (2013.01 - EP); G10K 2210/1081 (2013.01 - EP); G10K 2210/3028 (2013.01 - EP); G10K 2210/3045 (2013.01 - EP); G10K 2210/3222 (2013.01 - EP); G10K 2210/509 (2013.01 - EP)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IT LI LU MC NL SE
DOCDB simple family (publication)
CA 2136951 A1 19931223; EP 0643880 A1 19950322; EP 0643880 A4 19960221
DOCDB simple family (application)
CA 2136951 A 19920605; EP 92912841 A 19920605