| 摘要 |
<P>PROBLEM TO BE SOLVED: To resolve problems that a structure vibrates when high-power bass reproduction is about to be performed by using a passive radiator in an integrated small loudspeaker system in which an electronic circuit and an accumulator battery are incorporated in a housing provided between right and left loudspeakers, and that, for the purpose of prevention of the vibration, it is necessary to make the housing heavier or to provide an opposed type passive radiator, which causes increase in cost and size. <P>SOLUTION: One passive radiator is provided to each of right and left loudspeakers, and both passive radiators are arranged symmetrically so that vibration directions of those are opposed to each other. In an electronic circuit, right and left bass signals are combined so that right and left signals have the same level and the same phase within a bass reproduction frequency range. By including the electronic circuit and reproduction parts of the loudspeakers and making the bass reproduction monophonic, vibration of the right and left passive radiators becomes symmetry, and thereby, mechanical vibration of the entire loudspeaker system is suppressed. <P>COPYRIGHT: (C)2013,JPO&INPIT |
