The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 17, 1998
Filed:
Aug. 02, 1995
Applicant:
Inventors:
Shouichiro Terauchi, Saitama-ken, JP;
Tomohiro Suenaga, Saitama-ken, JP;
Masaharu Yoneyama, Saitama-ken, JP;
Takanobu Saito, Saitama-ken, JP;
Assignee:
Pioneer Electronic Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04R / ;
U.S. Cl.
CPC ...
381195 ; 381194 ; 381204 ; 181163 ;
Abstract
A loudspeaker has a first diaphragm having a domed shape, a second diaphragm formed on a periphery of the first diaphragm, and a voice coil provided at a juncture of the first and second diaphragms. The second diaphragm is designed such that a dip frequency by shape effect thereof is positioned at a frequency higher than a high limit frequency of the first diaphragm.