Annular phase plug of forward radiation type compression driver
A forward radiation and phase plug technology, applied in the direction of sensors, electrical components, etc., can solve the problems of phase mutual cancellation, phase inconsistency, and affecting the high-frequency characteristics of the drive unit, and achieve flat intermediate frequency, good acoustic impedance, and suppress interference effects and resonance effect
Inactive Publication Date: 2015-05-13
ZHONGHUAN ZENMAY TIANJIN ACOUSTICS TECH
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Problems solved by technology
The inconsistency of the phase may cause mutual cancellation between the phases, affecting the high-frequency characteristics of the drive unit
Method used
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[0009] Such as figure 1 , 2 , 3, the annular phase plug of the forward-radiating compression driver includes a speaker housing 4, and also includes a first phase plug 1, a second phase plug 2, a third phase plug 3, and a pin 5, and the speaker housing 4 is tapered The cavity is provided with a circle of raised edges 4-1 along the outer edge of the upper port of the cavity, and a circle of hollow round protrusions 4-2 is provided along the outer edge of the lower port of the cavity, on the surface of the tapered cavity of the loudspeaker shell 4 Pin holes are arranged horizontally; the first phase plug 1 is a bullet-shaped entity, and blind holes are horizontally arranged on the bullet-shaped entity; the second phase plug 2 and the third phase plug 3 are hollow annular bodies, and Pin holes are arranged horizontally on the ring surface respectively; in the cavity of the loudspeaker housing 4, the third phase plug 3, the second phase plug 2 and the first phase plug 1 are sequen...
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The invention relates to an annular phase plug of a forward radiation type compression driver. A third phase plug body, a second phase plug body and a first phase plug body are sequentially arranged from top to bottom inside a cavity of a loudspeaker casing, one end of a pin penetrates through a pin hole of the loudspeaker casing, a pin hole of the third phase plug body and a pin hole of second phase plug body sequentially and is arranged inside a blind hole of the first phase plug body to be closely fit with the blind hole, and gaps are arranged between the loudspeaker casing and the third phase plug body, between the third phase plug body and the second phase plug body and between the second phase plug body and the first phase plug body. The annular phase plug has the advantages that a diversion channel for acoustic wave transmission adopts the smooth flow design to reduce the acoustic energy loss during transmission; the interference effect and resonance can be restrained in a good mode; modal excitation and noises in cavities between a vibrating diaphragm and phase plug bodies can be avoided, so that the straight intermediate frequency and the high sensitivity can be obtained; and the area of the acoustic wave transmission channel adopts the approximate exponential type growth pattern, so that the good acoustic impedance can be obtained, and the high acoustoelectric conversion efficiency can be obtained.
Description
technical field [0001] The invention relates to the technical field of a strong sound broadcasting system, in particular to an annular phase plug of a forward radiation type compression driver of a forward radiation medium and high frequency compression driver. Background technique [0002] The phase plug of the traditional forward-radiating mid-high frequency compression driver is to isolate the sound wave in the middle of the diaphragm, and guide the sound wave to the throat through a long distance. One of such defects is that the sound radiation loss of the sound wave transmission channel is large. Second, the cavity between the diaphragm and the phase plug is prone to modal excitation effects. Third, the phase difference generated by the sound waves emitted by different parts of the diaphragm is relatively large. The inconsistency of the phases may lead to mutual cancellation between the phases and affect the high-frequency characteristics of the drive unit. Fourth, t...
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IPC IPC(8): H04R9/02H04R9/06
Inventor 孟子厚代云飞董强国张吉宏
Owner ZHONGHUAN ZENMAY TIANJIN ACOUSTICS TECH