Title:
CONE TYPE SPEAKER
Document Type and Number:
Japanese Patent JPS53133020
Kind Code:
A
Abstract:
PURPOSE: To enable larger constants in both density and velocity of sound to be provided by alternately superposing a number of sheets of paper, metal wafer, plastic film, etc. which are formed in sector shape and given specific notches thereby forming a cone.
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Inventors:
UMEZAWA ITARU
TSUBOI KOUICHI
TSUBOI KOUICHI
Application Number:
JP4804777A
Publication Date:
November 20, 1978
Filing Date:
April 25, 1977
Export Citation:
Assignee:
SHARP KK
International Classes:
H04R7/12; H04R7/18; (IPC1-7): H04R7/18
Domestic Patent References:
| JPH068885U | 1994-02-04 |