Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Takeshi Nakamura0
Date of Patent
June 21, 2011
0Patent Application Number
122376630
Date Filed
September 25, 2008
0Patent Primary Examiner
Patent abstract
A speaker system includes a main speaker and a subordinate speaker arranged around the main speaker. A pseudo-spherical wave is generated around the main speaker as a whole such that both speakers are vibrated in the frequency range of piston vibration and are in phase and that the propagation speed of a sound wave produced by the vibration of the subordinate speaker is preferably lower than the propagation speed of a sound wave produced by the vibration of the main speaker.
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