| 摘要 |
PROBLEM TO BE SOLVED: To realize a loudspeaker system with a stable sound pressure versus frequency characteristic by suppressing a peak and a dip with respect to the loudspeaker system where an acoustic tube is connected to a front face of a loudspeaker unit used for various acoustic devices. SOLUTION: In the loudspeaker system, a tube resonance caused in an acoustic tube 2 is detected by a microphone 4, this detected acoustic output signal is fed back to a subtractor 6 via a secondary high pass filter 7, and also the signal picked up by the microphone 4 is directly fed back to the subtractor 6 so as to realize a flat output frequency characteristic thereby providing the loudspeaker system with an excellent acoustic characteristic. |
