EP 1757162 A1 20070228 - MAGNET ASSEMBLY FOR A TRANSDUCER
Title (en)
MAGNET ASSEMBLY FOR A TRANSDUCER
Title (de)
MAGNETBAUGRUPPE FÜR EINEN WANDLER
Title (fr)
ENSEMBLE MAGNETIQUE POUR TRANSDUCTEUR
Publication
Application
Priority
US 2004018570 W 20040614
Abstract (en)
[origin: WO2006001792A1] A transducer suitable for use as a microphone or receiver in a hearing aid has a housing and a diaphragm disposed within the housing. A motor assembly is also disposed within the housing and operatively coupled to the diaphragm. The motor assembly includes a magnet assembly having a magnetic yoke forming a channel and a drive magnet disposed within the channel. The magnetic yoke has a saturation inductance greater than 1.5 T and the drive magnet an energy density greater than 72 kJ/m3 and a coercivity greater than 140 kA/m.
IPC 8 full level
H04R 11/02 (2006.01); H04R 11/04 (2006.01); H04R 1/02 (2006.01); H04R 1/06 (2006.01); H04R 7/06 (2006.01); H04R 31/00 (2006.01)
CPC (source: EP)
H04R 11/00 (2013.01); H04R 2205/041 (2013.01); H04R 2400/01 (2013.01)
Citation (search report)
See references of WO 2006001792A1
Citation (examination)
US 5960093 A 19990928 - MILLER THOMAS E [US]
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2006001792 A1 20060105; CN 1969590 A 20070523; EP 1757162 A1 20070228
DOCDB simple family (application)
US 2004018570 W 20040614; CN 200480043330 A 20040614; EP 04754977 A 20040614