| 摘要 |
The present invention relates to low sound reproduction of a compact speaker, a degree of freedom of design for the low sound reproduction, chattering noise of structures of electronic apparatuses due to powerful low sound reproduction, chattering noise of structures near a car speaker due to powerful low sound reproduction, leakage of sound out of a vehicle, and an exterior design of unattractive passive radiators. Specifically, a bottom-raised box part is installed in an enclosure to adjust a volume of the enclosure. A plurality of pairs of passive radiators having different resonance conditions is installed. An external enclosure is installed in the outside of the speaker system including a driver, passive radiators and an enclosure. Signal processing is performed to {suppress a gain at a resonance point of the lowest frequency band providing the maximal vibration of the driver} and {emphasize a gain at a resonance point of the lowest frequency band providing the minimal vibration of the driver}. |
