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Loudspeaker box structure with loading hole

A loading hole and sound box technology, applied in the direction of the transducer shell/cabinet/bracket, frequency/direction characteristic device, sensor, etc., can solve the problems of frequency response attenuation, poor transient effect, limited improvement space, etc., and achieve cost reduction , the effect of reducing requirements

Active Publication Date: 2012-12-26
李世煌
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When an electro-acoustic conversion device, such as an electromagnetic speaker, has a good enough frequency response in the bass range (tens of Hz), its diaphragm must have a large vibration stroke, but its elasticity will appear weaker in this way, which will inevitably cause transient vibration. The state effect is relatively poor; similarly, in the bass range, if the transient response of the speaker system is required to be good enough, then the frequency response of the lower frequency must be attenuated. Therefore, in the audio electroacoustic conversion device, especially in the bass range , frequency response and transient effects are a contradiction that becomes more and more contradictory as the frequency decreases
In terms of this phenomenon, a well-designed loudspeaker with a large enough cone vibration stroke and sufficient flexibility can improve this contradiction, but it will inevitably greatly increase the cost of the loudspeaker.
and there is very limited room for improvement

Method used

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  • Loudspeaker box structure with loading hole
  • Loudspeaker box structure with loading hole
  • Loudspeaker box structure with loading hole

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as figure 1 As shown, the first embodiment is in the form of a closed sound box. The driven cavity 20 occupies most of the space of the box body, and a sound cone hole 11 is arranged on the box body. At the position where the sound cone hole 11 is located, there is a smaller active cavity 10 and a loading hole 12 on the active cavity 10 in the box body. When the loudspeaker 13 is fixed to the cone hole 11 in a post-loaded manner, the active cavity 20 and the loudspeaker 13 form a sealed state, and the outer surface of the sound cone of the loudspeaker 13 communicates with the free space through the sound cone hole 11 . Simultaneously, the active cavity 10 communicates with the driven cavity 20 outside it only through the loading hole 12.

[0026] In this embodiment, the volume of the active chamber 10 is 1 / 3 of the volume of the driven chamber 20, and the cross-sectional area of ​​the loading hole 12 is 2 / 3 of the cone area of ​​the loudspeaker 13, compared to th...

Embodiment 2

[0029] Such as figure 2 , the driven chamber 20 of this embodiment is an inverted phase, in that the driven chamber 20 communicates with the external active chamber 10 through the loading hole 12, and also has an inverter tube 21 which communicates with the external free space.

[0030] On the active cavity 10, there is a sound cone hole 11, and the loudspeaker 13 is fixed in the same way after loading. However, in addition to the cone of the speaker 13, the entire active cavity 10 also has two passive diaphragms 15 as vibration units. Each passive diaphragm 15 is fixed in the diaphragm hole 14 and keeps sealed with the active cavity. In this embodiment, the cross-sectional area of ​​the loading hole 12 is 1 / 4 of the cross-sectional area of ​​all the vibration units, that is, the cone of the speaker 13 and all the passive diaphragms 21 .

[0031] This embodiment is suitable for the design of the inverted cabinet. Compared with the first embodiment, the passive diaphragm 15 ...

Embodiment 3

[0033] Such as image 3 , a sectional view of Embodiment 4 of the present invention. The active cavity 10 of the fourth embodiment is similar to the third embodiment, having a cone hole 11 and a rear-loaded speaker 13 , and a diaphragm hole 14 with a fixed diaphragm 15 . Simultaneously, the driven chamber 20 also has an inverter tube 21. The difference is that the loading hole 12 is no longer similar to the way in which the first and second embodiments are opened on a partition, but on the active chamber 10 there is a A buffer tube 31 is communicated, the inner wall of the buffer tube gradually shrinks from the active cavity 10 and extends into the passive cavity 20, while the inner wall of the end of the buffer tube 31 continues to extend and gradually expands to form a trumpet tube 32; the loading hole 12 is It is located at the smallest aperture where the trumpet tube 32 connects with the buffer tube 31. It can be seen that the active cavity 10 also includes the space in ...

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Abstract

The invention discloses a loudspeaker box structure with a loading hole, which is characterized in that the loudspeaker box structure comprises a driving cavity and a driven cavity, wherein the driving cavity comprises a sound cone hole and a loading hole; a loudspeaker is hermetically fixed on the sound cone hole; the driving cavity is communicated with the external air through the loading hole; one side of a sound cone of the loudspeaker is communicated with a free space; the driven cavity is communicated with the driving cavity through the loading hole; the area of the cross section of the loading hole is less than the areas of cross sections of air channels on both sides of the loading hole, and not greater than two-thirds of the effective area of all the vibration units in the driving cavity; and the volume of the driving cavity is not more than half of the total volume of the driving cavity and the driven cavity. The loading hole forms a loading component for improving the transient response of a box body, so that the contradiction between the bass frequency response and the transient effect is greatly solved, and the requirements on the loudspeaker are reduced; meanwhile, the bass frequency response and the transient effect of the whole system are relatively independently dealt, so that the cost of the loudspeaker is reduced.

Description

technical field [0001] The invention relates to a sound box structure with a loading hole. Background technique [0002] In the design of the speaker system, frequency response and transient effect are two important parameters that affect listening. The former reflects the ability of the electro-acoustic conversion system to restore the amplitude ratio of a specific audio segment, while the latter reflects the delay and attenuation characteristics of the audio . [0003] When an electro-acoustic conversion device, such as an electromagnetic speaker, has a good enough frequency response in the bass range (tens of Hz), its diaphragm must have a large vibration stroke, but its elasticity will appear weaker in this way, which will inevitably cause transient vibration. The state effect is relatively poor; similarly, in the bass range, if the transient response of the speaker system is required to be good enough, then the frequency response of the lower frequency must be attenuat...

Claims

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Application Information

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IPC IPC(8): H04R1/02H04R1/20
CPCH04R1/02H04R1/2811H04R1/2834H04R1/2842H04R1/2849H04R1/2865H04R1/30
Inventor 李世煌
Owner 李世煌
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