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:
Jan. 13, 2009
Filed:
Mar. 23, 2005
Shuji Saiki, Nara, JP;
Mitsukazu Kuze, Osaka, JP;
Toshiyuki Matsumura, Osaka, JP;
Sawako Kano, Hyogo, JP;
Shuji Saiki, Nara, JP;
Mitsukazu Kuze, Osaka, JP;
Toshiyuki Matsumura, Osaka, JP;
Sawako Kano, Hyogo, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A speaker system according to the present invention comprises a cabinet (), a speaker unit (), a first parting board (), a drone cone (), an adsorption member (), a second parting board (), a backboard (), a variable mechanism (), and a port (). A sound pressure generated by the speaker unit () causes a pressure variation in a second chamber (R) via the drone cone (). The adsorption member () with an effect of physical adsorption is operable to suppress the pressure variation. Furthermore, by displacing the diaphragm (), the variable mechanism () is operable to reduce a pressure variation of a direct current component, which is caused by variations in ambient temperature or atmospheric pressure of the speaker system.