EP 0883104 A3 20010912 - A turbulence-shield for a mcirophone in a wall-cavity
Title (en)
A turbulence-shield for a mcirophone in a wall-cavity
Title (de)
Eine Turbulenzabschirmung für ein Mikrophon in einer Wandaussparung
Title (fr)
Ecran contre la turbulence pour un microphone dans une cavité sur une paroi
Publication
Application
Priority
US 87102097 A 19970606
Abstract (en)
[origin: EP0883104A2] A cavity (32) is provided external to a duct or fan discharge (10) in an ANC system such that the duct liner or porous material (11) separates the interior of the duct (10) from the cavity (32). A microphone (16) is located in the cavity (32). Baffles (34) of porous material are preferably located in the cavity (32) so as to divide the cavity (32) into a plurality of chambers (32-1,32-2) to reduce internal flow recirculation in the cavity (32). <IMAGE>
IPC 1-7
IPC 8 full level
F24F 11/02 (2006.01); F24F 11/04 (2006.01); G10K 11/00 (2006.01); G10K 11/178 (2006.01)
CPC (source: EP US)
G10K 11/002 (2013.01 - EP US); G10K 11/17857 (2017.12 - EP US); G10K 11/17861 (2017.12 - EP US); G10K 11/17875 (2017.12 - EP US); G10K 11/17881 (2017.12 - EP US); G10K 2210/1082 (2013.01 - EP); G10K 2210/109 (2013.01 - EP); G10K 2210/112 (2013.01 - EP); G10K 2210/507 (2013.01 - EP)
Citation (search report)
- [XY] DE 4421803 A1 19960104 - STN ATLAS ELEKTRONIK GMBH [DE]
- [Y] WO 9519075 A2 19950713 - BOLT BERANEK & NEWMAN [US], et al
- [X] DE 19526098 C1 19960912 - STN ATLAS ELEKTRONIK GMBH [DE]
- [A] FR 2740599 A1 19970430 - TECHNOFIRST [FR]
- [A] US 4876722 A 19891024 - DEKKER NICOLAAS M J [GB], et al
- [A] US 5606622 A 19970225 - CHRISTENSON TERRY N [US]
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 0883104 A2 19981209; EP 0883104 A3 20010912; EP 0883104 B1 20070613; AU 6996098 A 19981210; AU 740156 B2 20011101; BR 9801773 A 19990713; CN 1138084 C 20040211; CN 1202592 A 19981223; DE 69837900 D1 20070726; DE 69837900 T2 20080214; ES 2286842 T3 20071201; JP 2878275 B2 19990405; JP H10339499 A 19981222; KR 100344595 B1 20020918; KR 19990006719 A 19990125; MY 125833 A 20060830; SG 77636 A1 20010116
DOCDB simple family (application)
EP 98630022 A 19980529; AU 6996098 A 19980605; BR 9801773 A 19980604; CN 98109562 A 19980605; DE 69837900 T 19980529; ES 98630022 T 19980529; JP 15870798 A 19980608; KR 19980020932 A 19980605; MY PI9802303 A 19980523; SG 1998001155 A 19980601