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:
Sep. 30, 2014
Filed:
Sep. 01, 2009
Applicant:
Masaki Katayama, Hamamatsu, JP;
Inventor:
Masaki Katayama, Hamamatsu, JP;
Assignee:
Yamaha Corporation, Hamamatsu-Shi, Shizuoka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03G 5/00 (2006.01); H03G 5/02 (2006.01);
U.S. Cl.
CPC ...
H03G 5/025 (2013.01);
Abstract
A signal processing device for supplying sound signals to a first speaker for emitting a sound on a low-pitched sound side and a second speaker for emitting a sound on a high-pitched sound side higher than the low-pitched sound side, includes a control portion that controls a characteristic of the sound signal supplied to the first speaker so that an output level of the first speaker is maintained at a crossover frequency between the first speaker and the second speaker, when an output level of the sound signal supplied to the first speaker is changed.