EP 0643571 A1 19950322 - ACTIVE SELECTIVE HEADSET.
Title (en)
ACTIVE SELECTIVE HEADSET.
Title (de)
AKTIV SELEKTIVER KOPFHÖRER.
Title (fr)
CASQUE D'ECOUTE SELECTIF ACTIF.
Publication
Application
Priority
- CA 2136949 A 19920605
- US 9204569 W 19920605
Abstract (en)
[origin: CA2136949A1] 2136949 9325167 PCTABS00028 An active selective headset system characterized by a headset (51) having controller means (50) with an LMS adapter, feedback compensator and cancellation filter with reference microphone (54) and residual microphones (53) and speakers (52), where the controller means synthesizes an "anti-noise" to cancel the noise before reaching the ear canal. The headset which is selective, i.e., "anti-noise" signal cancels only the noise signal with minimal affect on speech and warning signal which pass to the ear canal.
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 11/17823 (2017.12 - EP US); G10K 11/17837 (2017.12 - EP US); G10K 11/17854 (2017.12 - EP US); G10K 11/17857 (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 2210/121 (2013.01 - EP); G10K 2210/3028 (2013.01 - EP); G10K 2210/3045 (2013.01 - EP); G10K 2210/506 (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 2136949 A1 19931223; EP 0643571 A1 19950322; EP 0643571 A4 19960221
DOCDB simple family (application)
CA 2136949 A 19920605; EP 92913616 A 19920605