Title:
DIAPHRAGM FOR SPEAKER
Document Type and Number:
Japanese Patent JPS5366216
Kind Code:
A
Abstract:
PURPOSE: To prevent bell resonance, bend resonance and stretch resonance by providing embossing in the meridian and circumferential directions of a diaphragm with varying heights and areas thereby increasing the secondary moment of area of the diaphragm.
Inventors:
YAMADA OSAMU
OBARA ISAO
OBARA ISAO
Application Number:
JP14129176A
Publication Date:
June 13, 1978
Filing Date:
November 26, 1976
Export Citation:
Assignee:
HITACHI LTD
International Classes:
H04R7/14; H04R7/12; (IPC1-7): H04R7/02