EP 1246502 A1 20021002 - Microphone
Title (en)
Microphone
Title (de)
Mikrofon
Title (fr)
Microphone
Publication
Application
Priority
EP 01303026 A 20010330
Abstract (en)
Provided is a microphone with a stable output employing an aluminum membrane and having an air escape provided to the vibration detector. Specifically, the material used as the membrane frame material has a larger Young's modulus and a smaller thermal expansion coefficient than those of aluminum. Thereby, even if stress distribution or heat distribution is inflicted on the membrane frame, the slack or tension in the membrane will be reduced and the microphone output is stabilized.
IPC 1-7
IPC 8 full level
H04R 23/00 (2006.01)
CPC (source: EP)
H04R 23/008 (2013.01)
Citation (search report)
- [A] US 5854846 A 19981229 - BEAVERS BOB RAY [US]
- [A] US 4926696 A 19900522 - HARITONIDIS JOSEPH H [US], et al
- [X] PATENT ABSTRACTS OF JAPAN vol. 006, no. 081 (E - 107) 19 May 1982 (1982-05-19)
- [A] PATENT ABSTRACTS OF JAPAN vol. 008, no. 268 (E - 283) 7 December 1984 (1984-12-07)
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)
DOCDB simple family (application)
EP 01303026 A 20010330