Sound box

Abstract

The invention discloses a sound box, which comprises a box body provided with a box body internal space, wherein a circuit board assembly is arranged in the box body internal space; a loudspeaker which is arranged in the box body, wherein the front end of the loudspeaker faces the outside of the box body so as to radiate sound waves to the outside of the box body; an inverter tube arranged in the box body and comprising a first port and a second port, wherein the rear end of the loudspeaker is arranged at the first port; a passive radiator arranged at the second port and used for radiating the sound waves conducted by the inverter tube to the outside of the box body. The loudspeaker, the inverter tube and the passive radiator form a closed space independent of the internal space of the box body. The passive radiator shields the second port of the inverter tube, so that the second port of the inverter tube is prevented from generating wind sound. The loudspeaker, the inverter tube and the passive radiator form a closed space, so that sound waves radiated by the rear end of the loudspeaker are completely conducted out and do not enter the box body, loss or influence of parts in the box body on the sound waves radiated by the loudspeaker is avoided, and the transient characteristic of the sound box is improved.

Description

technical field [0001] The present invention relates to the technical field of sound box equipment, and more specifically, to a sound box. Background technique [0002] At present, in order to obtain a lower cut-off frequency for the speaker (ordinary speaker or smart speaker) and ensure that the speaker can reproduce a lower sound, in addition to improving the speaker unit, it is mainly to improve the speaker cavity. [0003] In the prior art, it is mainly by adding an inverted tube (such as an air duct) or a passive radiator (such as a passive speaker) to the cabinet to change the type of the speaker from a closed speaker to an inverted tube speaker or passive radiation. instrument speakers. [0004] However, whether it is an inverted tube speaker or a passive radiator speaker, the added inverted tube or passive radiator is connected to the inner space of the speaker, that is, the reverse sound wave radiated from the back of the speaker passes through the inner space of t...

AI Technical Summary

Problems solved by technology

[0005] For the inverted tube speaker, at the air outlet of the inverted tube, the air vibration inside the speaker interacts with the air outside the speaker, and wind noise will inevitably be generated, that is, due to the structural characteristics of the inverted tube speaker It is determined that the wind noise at the air outlet of the inverter tube cannot be eradicated

[0006] As for the passive radiator type speaker, although it avoids the wind noise generated by the inverter tube, due to the power amplifier board, power supply and other components in the cabinet, it is easy to cause the vibration of the passive radiator to be irregular, that is, , making the transient characteristics of the speaker poor

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