Loudspeaker box structure

Abstract

The invention relates to a loudspeaker box structure which comprises a loudspeaker and a loudspeaker box cavity, wherein the loudspeaker is arranged in the loudspeaker box cavity; the loudspeaker box cavity comprises a reversed cavity unit and a positive cavity unit; the reversed cavity unit is connected with the positive cavity unit; the loudspeaker is arranged between the reversed cavity unit and the positive cavity unit; the reversed cavity unit comprises at least one reversed resonant cavity; and the positive cavity unit comprises at least one positive resonant cavity. A positive radiating sound wave of the loudspeaker is transmitted after being resonated and tuned by the positive cavity unit; meanwhile, the reversed radiating sound wave of the loudspeaker can be transmitted after being resonated and tuned by the reversed cavity unit. The frequency lower limit of the resonated and tuned radiating sound wave is far lower than the lower limit of the reversed radiating sound wave andthe positive radiating sound wave of the loudspeaker; the number of the positive resonant cavities and the reversed resonant cavities is adjusted so that the two sound saves are laminated in same phase; and the invention ensures the radiating efficiency of the loudspeaker box, reduces the low-frequency playback lower limit of the loudspeaker box, improves the sound quality and has the advantages of smaller caliber of the loudspeaker and smaller size of the loudspeaker box.

Description

technical field [0001] The invention relates to the technical field of sound box equipment, in particular to a sound box structure. Background technique [0002] At present, the most popular speaker cavity structure is a single-cavity phase-conducting box, and its structure diagram is attached figure 1 As shown, the loudspeaker and the pipeline are placed in the same cavity, and the cavity and the pipeline form a Helmholtz resonant cavity. The resonance of the resonant cavity is tuned at a certain frequency point, and resonance occurs during operation, which is similar to the function of a band-pass filter. The back radiated sound energy is output through the pipeline in reverse phase, and is superimposed with the positive phase radiated sound energy of the speaker in the same phase, which can effectively use the back radiated sound energy of the speaker and improve the radiation efficiency of the speaker. At the same time, the lower limit of the low frequency reproduction o...

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Problems solved by technology

[0002] At present, the most popular speaker cavity structure is a single-cavity phase-conducting box, and its structure diagram is attached figure 1 As shown, the loudspeaker and the pipeline are placed in the same cavity, and the cavity and the pipeline form a Helmholtz resonant cavity. The resonance of the resonant cavity is tuned at a certain frequency point, and resonance occurs during operation, which is similar to the function of a band-pass filter. The back radiated sound energy is output through the pipeline in reverse phase, and is superimposed with the positive phase radiated sound energy of the speaker in the same phase, which can effectively use the back radiated sound energy of the speaker and improve the radiation efficiency of the speaker. At the same time, the lower limit of the low frequency reproduction of the open box can be It is lower than the resonant frequency of the speaker itself, but theoretically, when debugging the phase guide box with the best effect, the maximum limit of the lower limit of low frequency reproduction can only be reduced to 0.707 times, and the lower limit of low frequency is limited. there are certain requirements

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