EP 0072991 A2 19830302 - Speaker system.
Title (en)
Speaker system.
Title (de)
Lautsprechersystem.
Title (fr)
Système de haut-parleur.
Publication
Application
Priority
JP 13409681 A 19810828
Abstract (en)
In a speaker system having a cone type vibration plate (12), a part of the cone type vibration plate is made to protrude toward a space beyond a buffle surface (16 min ) to which the sound wave is radiated from the vibration plate (12) while a dome type vibration plate (22) having a bump effect is fixed to the cone type vibration plate (12) so that the cone type vibration plate (12) may have both dip and bump effects simultaneously, whereby using a complementary characteristic for these dip and bump effects required sound pressure-frequency characteristic and sound pressure phase-frequency characteristic can be obtained.
IPC 1-7
IPC 8 full level
H04R 1/22 (2006.01); H04R 7/12 (2006.01); H04R 9/06 (2006.01)
CPC (source: EP)
H04R 1/22 (2013.01); H04R 7/12 (2013.01); H04R 9/06 (2013.01)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0072991 A2 19830302; EP 0072991 A3 19830420; EP 0072991 B1 19850703; DE 3264559 D1 19850808; JP S5838097 A 19830305
DOCDB simple family (application)
EP 82107390 A 19820813; DE 3264559 T 19820813; JP 13409681 A 19810828