CN2774058Y

CN2774058Y - Six-order bandpass speaker system with passive radiator

Info

Publication number: CN2774058Y
Application number: CN 200520053988
Authority: CN
Inventors: 卢斯荣
Original assignee: Shenzhen TCL New Technology Co Ltd
Current assignee: Shenzhen TCL New Technology Co Ltd
Priority date: 2005-01-18
Filing date: 2005-01-18
Publication date: 2006-04-19
Anticipated expiration: 2015-01-18

Abstract

The utility model relates to a sixth-order band-pass speaker system with a passive radiator, which includes front and rear resonance boxes and an active speaker, and is characterized in that passive radiators are installed on the front and rear of the resonance box, and The passive radiator is sealed and fixed on the front and rear resonance boxes, so that the passive radiator and the front and rear resonance boxes form a sealed whole; the radiation area is large, and the air vibration speed is reduced under the same output sound pressure, which improves The passive radiator separates the resonance box from the outside air, which can effectively suppress the impact of the normal mode of sound waves in the resonance box on the sound radiation of the system, and effectively reduce the nonlinear distortion of the system.

Description

Sixth order bandpass loudspeaker system with passive radiator

技术领域technical field

本实用新型涉及一种能进行电能和声能转换的扬声器系统，确切地说，涉及一种利用无源辐射器辅助低频辐射的新型六阶带通扬声器系统。The utility model relates to a loudspeaker system capable of converting electric energy and sound energy, in particular to a novel sixth-order band-pass loudspeaker system which utilizes a passive radiator to assist low-frequency radiation.

背景技术Background technique

传统六阶带通式扬声器系统(见附图1)是由主动扬声器，共振箱，前、后倒相管三大部分组成。扬声器的振膜受驱动后，产生振动并通过与共振箱内空气的耦合，使共振箱内空气产生振动，箱内空气与倒相管的耦合向空间辐射声波，前、后倒相管分别辐射不同频段、不同相位的声波，两者叠加实现高、低频声波的滤除，从而实现六阶带通响应。其声学类比线路图如附图2所示，附图2中，Pg为等效声压源，Ma为主动扬声器的等效声质量，Ca为主动扬声器的等效声顺，Ra为主动扬声器的等效声阻，Cb1为前共振箱的等效声顺，Mp1为前倒相管的等效声质量，Cb2为后共振箱的等效声顺，Mp2为后倒相管的等效声质量。根据类比线路图可以得到该系统的辐射声压频率响应函数为：The traditional sixth-order band-pass speaker system (see Figure 1) is composed of three parts: active speaker, resonance box, front and rear inverter tubes. After the diaphragm of the speaker is driven, it vibrates and through the coupling with the air in the resonance box, the air in the resonance box vibrates, and the coupling between the air in the box and the inverter tube radiates sound waves to the space, and the front and rear inverter tubes radiate respectively The sound waves of different frequency bands and different phases are superimposed to realize the filtering of high and low frequency sound waves, thus realizing the sixth-order band-pass response. Its acoustic analog circuit diagram is shown in Figure 2. In Figure 2, Pg is the equivalent sound pressure source, Ma is the equivalent sound quality of the active speaker, Ca is the equivalent sound compliance of the active speaker, and Ra is the Equivalent sound resistance, Cb1 is the equivalent sound compliance of the front resonance box, Mp1 is the equivalent sound quality of the front inverter tube, Cb2 is the equivalent sound compliance of the rear resonance box, and Mp2 is the equivalent sound quality of the rear inverter tube . According to the analog circuit diagram, the radiated sound pressure frequency response function of the system can be obtained as:

$P_{v} = \frac{ρf}{2 r} | U_{p 1} - U_{p 2} | = \frac{ρ P_{g}}{4 πr M_{a}} | G_{v} (jw) |$ LLLLLG_v(jw)为系统函数 $P_{v} = \frac{ρf}{2 r} | u_{p 1} - u_{p 2} | = \frac{ρ P_{g}}{4 πr m_{a}} | G_{v} (jw) |$ LLLLLG _v (jw) is a system function

${G G}_{v v} ((jw jw)) = = \frac{\frac{{((jw jw))}^{44}}{{W W}_{s the s}^{22}} ((\frac{11}{{W W}_{p p 11}^{22}} - - \frac{11}{{W W}_{p p 22}^{22}}))}{[\begin{matrix} 11 + + \frac{jw jw}{{W W}_{s the s} {Q Q}_{t t}} + + {((jw jw))}^{22} ((\frac{11}{{W W}_{s the s}^{22}} + + \frac{11 + + α α}{{W W}_{p p 11}^{22}} + + \frac{11 + + β β}{{W W}_{p p 22}^{22}})) + + \frac{{((jw jw))}^{33}}{{W W}_{s the s} {Q Q}_{t t}} ((\frac{11}{{W W}_{p p 11}^{22}} + + \frac{11}{{W W}_{p p 22}^{22}})) + + {((jw jw))}^{44} ((\frac{11}{{W W}_{p p 11}^{22} {W W}_{s the s}^{22}} + + \frac{11}{{W W}_{p p 22}^{22} {W W}_{s the s}^{22}} + + \frac{11 + + α α + + β β}{{W W}_{p p 11}^{22} {W W}_{p p 22}^{22}})) \\ + + \frac{{((jw jw))}^{22}}{{W W}_{p p 22}^{22} {W W}_{p p 11}^{22} {W W}_{s the s} {Q Q}_{t t}} + + \frac{{((jw jw))}^{66}}{{W W}_{p p 22}^{22} {W W}_{p p 11}^{22} {W W}_{s the s}^{22}} \end{matrix}]}$

其中： $\frac{C_{a}}{C_{b 1}} = α; \frac{C_{a}}{C_{b 2}} = β;$ $W_{p 1} = \frac{1}{\sqrt{M_{p 1} C_{b 1}}};$ $W_{p 2} = \frac{1}{\sqrt{M_{p 2} C_{b 2}}};$ $W_{s} = \frac{1}{\sqrt{M_{a} C_{a}}};$ $Q_{t} = \frac{W_{s} M_{a}}{R_{a}}$ in: $\frac{C_{a}}{C_{b 1}} = α; \frac{C_{a}}{C_{b 2}} = β;$ $W_{p 1} = \frac{1}{\sqrt{m_{p 1} C_{b 1}}};$ $W_{p 2} = \frac{1}{\sqrt{m_{p 2} C_{b 2}}};$ $W_{the s} = \frac{1}{\sqrt{m_{a} C_{a}}};$ $Q_{t} = \frac{W_{the s} m_{a}}{R_{a}}$

根据系统函数合理选择相关参数，就可以得到预期的响应特性，可以看出对于给定的扬声器系统，调谐频率FB是一定的，共振箱的容积也是一定的，由下面的公式：According to the system function, the relevant parameters are reasonably selected, and the expected response characteristics can be obtained. It can be seen that for a given speaker system, the tuning frequency FB is certain, and the volume of the resonance box is also certain. The following formula:

$F_{B} = 1 / 2 π \sqrt{M_{p} C_{b}}$ ----------Mp为倒相管声质量，Cb为共振箱等效声顺 $f_{B} = 1 / 2 π \sqrt{m_{p} C_{b}}$ ---------- Mp is the sound quality of the inverted tube, Cb is the equivalent sound compliance of the resonance box

M_p＝ρL/S_p-------------L为倒相管长度，Sp为倒相管等效辐射面积M _p =ρL/S _p ------------- L is the length of the inverter tube, Sp is the equivalent radiation area of the inverter tube

P＝(ρf/2r)U_p------------P为辐射声压，Up为空气体积速度P=(ρf/2r)U _p ------------P is radiation sound pressure, Up is air volume velocity

U_p＝V_pS_p--------------Vp为管内的空气速度U _p ＝V _p S _p -------------- Vp is the air speed in the tube

可以看出，要提高系统辐射声压，则必须保证管中传输的空气体积速度，管内空气振动速度和倒相管的截面积的乘积为空气体积速度。由于倒相管的截面积的取值范围有较大的局限性(通常远小于主动扬声器的有效辐射面积)，导致倒相管中的空气振动速度很高，不可避免的带来空气摩擦噪声；因此我们并不希望空气振动速度太大，相反希望在保证声压输出的情况下降低空气振动速度，从而降低低频失真，如此则必须增大倒相管尺寸，则必然会导致管子长度变得很长，管子的长度和面积成反比，这在结构上常会遇到一定的困难(在小体积扬声器箱中尤其明显)。另一方面，该系统箱内外空气通过倒相管直接连通，因此箱内简正方式的影响不可避免，表现在系统的非线性失真较大。It can be seen that to increase the radiation sound pressure of the system, the air volume velocity transmitted in the tube must be guaranteed, and the product of the air vibration velocity in the tube and the cross-sectional area of the inverter tube is the air volume velocity. Due to the limited value range of the cross-sectional area of the inverter tube (usually much smaller than the effective radiation area of the active speaker), the air vibration speed in the inverter tube is very high, which inevitably brings air friction noise; Therefore, we don't want the air vibration speed to be too high. On the contrary, we hope to reduce the air vibration speed while ensuring the sound pressure output, thereby reducing low-frequency distortion. In this case, the size of the inverter tube must be increased, which will inevitably lead to a very long tube length. Long, the length of the tube is inversely proportional to the area, which often encounters certain difficulties in structure (especially in small-volume speaker boxes). On the other hand, the air inside and outside the system box is directly connected through the inverter tube, so the influence of the normal mode in the box is inevitable, which is reflected in the large nonlinear distortion of the system.

发明内容Contents of the invention

本实用新型的目的是提供一种具有无源辐射器的六阶带通扬声器系统，该系统利用无源辐射器取代传统六阶带通系统中的倒相管，性能优异、低低失真，并在结构安装上方便可行。The purpose of this utility model is to provide a sixth-order band-pass loudspeaker system with a passive radiator, which uses a passive radiator to replace the inverter tube in the traditional sixth-order band-pass system, with excellent performance, low distortion, and It is convenient and feasible in structural installation.

本实用新型的技术方案是：The technical scheme of the utility model is:

一种具有无源辐射器的六阶带通扬声器系统，包括前、后共振箱，主动扬声器，其特征在于：在共振箱上的前、后安装设置有无源辐射器，且该无源辐射器密封固定于前、后共振箱上，使无源辐射器与前、后共振箱形成密封的整体。主动扬声器受驱动后，产生振动并通过与共振箱内空气的耦合，使共振箱内空气产生振动，共振箱内空气与密封固定安装于共振箱上的前、后无源辐射器的耦合，导致前、后无源辐射器做活塞振动，向空间辐射声波，前、后无源辐射器辐射不同频段、不同相位的声波，两者叠加实现高、低频的滤除，从而实现准六阶带通响应。A sixth-order bandpass loudspeaker system with passive radiators, including front and rear resonance boxes and active speakers, is characterized in that: the front and rear installations on the resonance boxes are provided with passive radiators, and the passive radiation The radiator is sealed and fixed on the front and rear resonance boxes, so that the passive radiator and the front and rear resonance boxes form a sealed whole. After the active loudspeaker is driven, it generates vibration and through the coupling with the air in the resonance box, the air in the resonance box vibrates, and the air in the resonance box is coupled with the front and rear passive radiators that are sealed and fixed on the resonance box, resulting in The front and rear passive radiators do piston vibration and radiate sound waves to the space. The front and rear passive radiators radiate sound waves of different frequency bands and different phases. The superposition of the two achieves high and low frequency filtering, thereby realizing quasi-sixth-order bandpass response.

所述主动扬声器为传统的直接辐射式电动扬声器，其安装位置为共振箱前、后腔体中间的隔板，受驱动后，分别向前、后腔体辐射声波。其安装必须牢固，不可出现机械振动，并在与隔板连接处加垫密封棉，如EVA棉。The active loudspeaker is a traditional direct-radiating electric loudspeaker, and its installation position is the partition between the front and rear cavities of the resonance box. After being driven, it radiates sound waves to the front and rear cavities respectively. Its installation must be firm, no mechanical vibration, and gaskets such as EVA cotton should be added to the connection with the partition.

所述共振箱，由前、后两个共振箱组成，无源辐射器也具有前后两个，前无源辐射器安装于前共振箱上，后无源辐射器通安装于后共振箱上，两共振箱通过主动扬声器连接。箱体材料必须选择坚固不易震动材料制成如MDF板材，要求密封。The resonance box is composed of two front and rear resonance boxes, and the passive radiator also has two front and rear ones. The front passive radiator is installed on the front resonance box, and the rear passive radiator is installed on the rear resonance box. The two resonance boxes are connected by active speakers. The material of the box body must be made of strong and not easy to vibrate materials such as MDF boards, which require sealing.

所述无源辐射器，是一种复合材料制成的由弹性良好的折环连接一块平面或锥面的振动发声器；折环必须具有很好的弹性，同时不易产生非弹性形变；振动发声器必须具备足够的刚性，以保证振动时不会产生形变，振动为活塞振动。The passive radiator is a vibrating sounder made of a composite material that is connected to a flat or conical surface by a ring with good elasticity; the ring must have good elasticity and is not easy to produce inelastic deformation; the vibration sound The device must have sufficient rigidity to ensure that no deformation occurs during vibration, and the vibration is piston vibration.

上述的无源辐射器，其具体的结构为：中间是振动发声器，该振动发声器为平板结构或者是锥形结构，振动发声器的外缘具有折环，折环向外连接有支架，振动发声器通过支架连接于共振箱上。The specific structure of the above-mentioned passive radiator is as follows: a vibrating sounder in the middle, the vibrating sounder is a flat plate structure or a conical structure, the outer edge of the vibrating sounder has a ring, and the ring is connected with a bracket outward. The vibration sounder is connected to the resonance box through a bracket.

本实用新型采用无源辐射器取代传统的倒箱管，辐射面积大，同等输出声压情况下，降低了空气振动速度，而改善了低频辐射失真，表现在系统在做低频重放时空气摩擦噪声大幅降低；无源辐射器的主要参数的调整与结构尺寸没有必然的关系，结构尺寸自由度相对比较高，因此在结构设计上具有较大的灵活性，尤其适合于小型声学系统的设计；同时，无源辐射器将共振箱和外界空气隔开，可有效抑制共振箱内声波简正方式对系统声辐射的影响，有效降低了系统的非线性失真。The utility model adopts a passive radiator to replace the traditional inverted box tube, and has a large radiation area. Under the same output sound pressure, the air vibration speed is reduced, and the low-frequency radiation distortion is improved, which is manifested in the air friction when the system is doing low-frequency playback. The noise is greatly reduced; the adjustment of the main parameters of the passive radiator has no necessary relationship with the structural size, and the degree of freedom of the structural size is relatively high, so it has greater flexibility in structural design, especially suitable for the design of small acoustic systems; At the same time, the passive radiator separates the resonance box from the outside air, which can effectively suppress the impact of the normal mode of sound waves in the resonance box on the sound radiation of the system, and effectively reduce the nonlinear distortion of the system.

附图说明Description of drawings

图1传统六阶带通式扬声器系统，Figure 1 Traditional sixth-order bandpass loudspeaker system,

图2传统六阶带通式扬声器系统类比线路图，Figure 2 The analog circuit diagram of the traditional sixth-order band-pass loudspeaker system,

图3本实用新型的声学结构示意图，Fig. 3 is the schematic diagram of the acoustic structure of the utility model,

图4本实用新型的声学类比线路图，The acoustic analog circuit diagram of Fig. 4 the utility model,

图5为无源辐射器的结构示意图，Figure 5 is a schematic structural view of a passive radiator,

图6为无源辐射器的侧面示意图。Fig. 6 is a schematic side view of a passive radiator.

具体实施方式Detailed ways

下面结合附图进一步介绍本实用新型的结构特征和实施：Further introduce structural feature and implementation of the present utility model below in conjunction with accompanying drawing:

本实用新型的声学结构及安装示意图如附图3所示，Acoustic structure of the present utility model and installation schematic diagram are as shown in accompanying drawing 3,

其中，主动扬声器为传统的直接辐射式电动扬声器，其安装位置为共振箱前、后腔体中间的隔板，受驱动后，分别向前、后腔体辐射声波。其安装必须牢固，不可出现机械振动，并在与隔板连接处加垫EVA密封棉。Among them, the active loudspeaker is a traditional direct radiation electric loudspeaker, and its installation position is the partition between the front and rear chambers of the resonance box. After being driven, it radiates sound waves to the front and rear chambers respectively. Its installation must be firm without mechanical vibration, and EVA sealing cotton should be added to the connection with the partition.

共振箱是由前、后两个共振箱组成，无源辐射器也具有前后两个，前无源辐射器安装于前共振箱上，后无源辐射器通安装于后共振箱上，两共振箱通过主动扬声器连接。箱体材料必须选择坚固小易震动材料制成如MDF板材，要求密封。The resonance box is composed of two front and rear resonance boxes, and the passive radiator also has two front and rear ones. The front passive radiator is installed on the front resonance box, and the rear passive radiator is installed on the rear resonance box. The boxes are connected through active speakers. The material of the box body must be made of strong and small vibration-prone materials such as MDF boards, and sealing is required.

结合图5、图6，无源辐射器，是由复合材料制成的，具体地说是由弹性良好的折环2连接一块平面的振动发声器1；振动发声器1的外缘具有折环2，折环2向外连接有支架3，振动发声器1通过支架3连接于共振箱上。折环2必须具有很好的弹性，同时不易产生非弹性形变；振动发声器1必须具备足够的刚性，以保证振动时不会产生形变，同时，无源辐射器与前共振箱固定部位通过螺钉及胶水固定密封，使整个系统密闭。With reference to Fig. 5 and Fig. 6, the passive radiator is made of composite material, specifically, a planar vibrating sounder 1 is connected by a ring 2 with good elasticity; the outer edge of the vibrating sounder 1 has a ring 2. The bracket 3 is connected to the outside of the ring 2, and the vibration sounder 1 is connected to the resonance box through the bracket 3. Surrounding ring 2 must have good elasticity, and at the same time, it is not easy to produce inelastic deformation; vibration sounder 1 must have sufficient rigidity to ensure that no deformation occurs during vibration, and at the same time, the passive radiator and the front resonance box are fixed by screws And glue fixed seal, make the whole system airtight.

可以看出无源辐射器能将箱内外的空气隔开，可以有效的抑制箱能声波简正方式对系统声辐射的影响，有效降低了系统的非线性失真。It can be seen that the passive radiator can separate the air inside and outside the box, which can effectively suppress the influence of the box energy sound wave normal mode on the sound radiation of the system, and effectively reduce the nonlinear distortion of the system.

根据声学类比原理可以画出本实用新型的声学类比线路图，如图4所示。其中Pg为等效声压源，Ma为主动扬声器的等效声质量，Ca为主动扬声器的等效声顺，Ra为主动扬声器的等效声阻，Cbf为前共振箱的等效声顺，Mpf为前无源辐射器的等效声质量，Cpf为前无源辐射器的等效声顺，Cbr为后共振箱的等效声顺，Mpr为后无源辐射器的等效声质量，Cpr为后无源辐射器的等效声顺。由此可以得出本实用新型的声学系统所辐射的声压频率响应函数如下：According to the principle of acoustic analogy, the acoustic analog circuit diagram of the present invention can be drawn, as shown in FIG. 4 . Where Pg is the equivalent sound pressure source, Ma is the equivalent sound quality of the active speaker, Ca is the equivalent sound compliance of the active speaker, Ra is the equivalent sound resistance of the active speaker, and Cbf is the equivalent sound compliance of the front resonance box, Mpf is the equivalent sound quality of the front passive radiator, Cpf is the equivalent sound compliance of the front passive radiator, Cbr is the equivalent sound compliance of the rear resonance box, Mpr is the equivalent sound quality of the rear passive radiator, Cpr is the equivalent sound compliance of the rear passive radiator. Can draw thus the sound pressure frequency response function that the acoustic system of the present invention radiates is as follows:

${P P}_{pr pr} = = \frac{ρf ρf}{22 r r} | | {U u}_{pr pr} - - {U u}_{pf pf} | | = = \frac{ρ ρ {P P}_{g g}}{44 πr πr {M m}_{a a}} | | {G G}_{p p} ((jw jw)) | |$

LLU_pr为后无源辐射器推动空气的体积速度，U_pf为后无源辐射器推动空气的体积速度，LLU _pr is the volume velocity of the air pushed by the rear passive radiator, U _pf is the volume velocity of the air pushed by the rear passive radiator,

${G G}_{p p} ((jw jw)) = = \frac{\frac{{((jw jw))}^{22}}{{W W}_{s the s}^{22}} [[\frac{γ γ}{α α} - - \frac{δ δ}{β β} + + \frac{{((jw jw))}^{22}}{{W W}_{s the s}^{22}} ((\frac{γ γ}{{h h}_{f f}^{22} α α} - - \frac{δ δ}{β β {h h}_{r r}^{22}}))}{[\begin{matrix} \frac{((α α + + γ γ)) ((β β + + δ δ)) + + ((β β + + δ δ)) + + ((α α + + γ γ))}{αβ αβ} + + \frac{jw jw}{{W W}_{s the s} {Q Q}_{t t}} \frac{((α α + + γ γ)) ((β β + + δ δ))}{αβ αβ} \\ + + \frac{{((jw jw))}^{22}}{{W W}_{s the s}^{22}} [[\frac{((α α + + γ γ)) ((β β + + δ δ))}{αβ αβ} + + \frac{11}{{h h}_{r r}^{22}} \frac{((α α + + 11)) ((β β + + δ δ)) + + α α}{αβ αβ} + + \frac{11}{{h h}_{f f}^{22}} \frac{((α α + + γ γ)) ((β β + + 11)) + + β β}{αβ αβ}]] \\ + + \frac{{((jw jw))}^{33}}{{W W}_{s the s}^{33} {Q Q}_{t t}} [[\frac{11}{{h h}_{r r}^{22}} ((\frac{β β + + δ δ}{β β})) + + \frac{11}{{h h}_{f f}^{22}} ((\frac{α α + + γ γ}{α α}))]] + + \frac{{((jw jw))}^{44}}{{W W}_{s the s}^{44}} [[\frac{11}{{h h}_{r r}^{22}} ((\frac{β β + + δ δ}{β β})) + + \frac{11}{{h h}_{f f}^{22}} ((\frac{α α + + γ γ}{α α})) + + \frac{βα βα + + β β + + α α}{αβ αβ {h h}_{r r}^{22} {h h}_{f f}^{22}}]] \\ + + \frac{{((jw jw))}^{55}}{{h h}_{r r}^{22} {h h}_{f f}^{22} {W W}_{s the s}^{55} {Q Q}_{t t}} + + \frac{{((jw jw))}^{66}}{{h h}_{r r}^{22} {h h}_{f f}^{22} {W W}_{s the s}^{66}} \end{matrix}]}$

其中：C_br＝αC_a；C_bf＝βC_a； $W_{pr} = \frac{1}{\sqrt{M_{pr} C_{pr}}} = h_{r} W_{s};$ $W_{pf} = \frac{1}{\sqrt{M_{pf} C_{pf}}} = h_{f} W_{s};$ C_pr＝γC_a；C_pf＝δC_a；Where: C _br =αC _a ; C _bf =βC _a ; $W_{pr} = \frac{1}{\sqrt{m_{pr} C_{pr}}} = h_{r} W_{the s};$ $W_{pf} = \frac{1}{\sqrt{m_{pf} C_{pf}}} = h_{f} W_{the s};$ C _pr =γC _a ; C _pf =δC _a ;

要得到平坦响应则 $\frac{γ}{α} = \frac{δ}{β},$ 即 $\frac{C_{br}}{C_{bf}} = \frac{C_{pr}}{C_{pf}},$ 此时系统函数可简化为：For a flat response then $\frac{γ}{α} = \frac{δ}{β},$ Right now $\frac{C_{br}}{C_{b f}} = \frac{C_{pr}}{C_{pf}},$ At this point, the system function can be simplified as:

${G G}_{p p} ((jw jw)) = = \frac{\frac{{((jw jw))}^{44}}{{W W}_{s the s}^{44}} \frac{γ γ}{α α} ((\frac{11}{{h h}_{f f}^{22}} - - \frac{11}{{h h}_{r r}^{22}}))}{[\begin{matrix} ((11 + + \frac{γ γ}{α α})) ((11 + + \frac{γ γ}{α α} + + \frac{11}{α α} + + \frac{11}{β β})) + + \frac{jw jw}{{W W}_{s the s} {Q Q}_{t t}} {((11 + + \frac{γ γ}{α α}))}^{22} + + \frac{{((jw jw))}^{22}}{{W W}_{s the s}^{22}} [[{((11 + + \frac{γ γ}{α α}))}^{22} ((11 + + \frac{11}{{h h}_{r r}^{22}} + + \frac{11}{{h h}_{f f}^{22}})) + + \frac{11}{{h h}_{r r}^{22} β β} + + \frac{11}{{αh αh}_{f f}^{22}}]] \\ + + \frac{{((jw jw))}^{33}}{{{W W}_{s the s}^{33} Q Q}_{t t}} ((11 + + \frac{γ γ}{α α})) ((\frac{11}{{h h}_{r r}^{22}} + + \frac{11}{{h h}_{f f}^{22}})) + + \frac{{((jw jw))}^{44}}{{W W}_{s the s}^{44}} [[((11 + + \frac{γ γ}{α α})) ((\frac{11}{{h h}_{r r}^{22}} + + \frac{11}{{h h}_{f f}^{22}})) + + \frac{11 + + \frac{11}{α α} + + \frac{11}{β β}}{{h h}_{r r}^{22} {h h}_{f f}^{22}}]] + + \frac{{((jw jw))}^{55}}{{h h}_{r r}^{22} {h h}_{f f}^{22} {W W}_{s the s}^{55} {Q Q}_{t t}} + + \frac{{((jw jw))}^{66}}{{h h}_{r r}^{22} {h h}_{f f}^{22} {W W}_{s the s}^{66}} \end{matrix}]}$

此时本使用新型的系统函数特性和传统的六阶带通系统的系统函数的特性非常相似的，因此可以采用相同的分析方法来求出有关元件及箱体参数。对于特定的预期响应前后无源辐射器的参数是一定的，也就是无源辐射器的谐振频率及无源辐射器的顺性值可以通过对响应特性分析而得出。无源辐射器的谐振频率由以下公式给出：At this time, the characteristics of the new system function used in this paper are very similar to those of the traditional sixth-order bandpass system, so the same analysis method can be used to obtain the relevant components and box parameters. The parameters of the passive radiator before and after a specific expected response are certain, that is, the resonant frequency of the passive radiator and the compliance value of the passive radiator can be obtained by analyzing the response characteristics. The resonant frequency of a passive radiator is given by:

$f_{p} = \frac{1}{2 π \sqrt{M_{mp} C_{mp}}} = \frac{1}{2 π \sqrt{M_{p} C_{p}}};$ $M_{p} = \frac{M_{mp}}{{S_{p}}^{2}};$ C_p＝C_mpS_p ²； $f_{p} = \frac{1}{2 π \sqrt{m_{mp} C_{mp}}} = \frac{1}{2 π \sqrt{m_{p} C_{p}}};$ $m_{p} = \frac{m_{mp}}{S_{p}};$ C _p = C _mp S _p ² ;

LLM_mp为无源辐射器的等效质量，单位为Kg，M_p为无源辐射器的等效声质量LLM _mp is the equivalent mass of the passive radiator in Kg, M _p is the equivalent sound quality of the passive radiator

LLC_mp为无源辐射器的等效力顺，单位为m/N，C_p为无源辐射器的等效声顺LLC _mp is the equivalent compliance of the passive radiator, the unit is m/N, C _p is the equivalent compliance of the passive radiator

可以看出，调整无源辐射器的谐振频率可以通过改变振动发声器的重量和折环的弹性系数来实现，这在实际使用过程中非常容易实现，同时无源辐射器谐振频率的调整完全可以在不改变其结构尺寸的情况下进行，这使其具有安装及调整方便的优点。It can be seen that adjusting the resonant frequency of the passive radiator can be achieved by changing the weight of the vibration generator and the elastic coefficient of the ring, which is very easy to achieve in actual use, and the resonant frequency of the passive radiator can be adjusted completely It is carried out without changing its structural size, which makes it easy to install and adjust.

同时可以看出在条件允许的情况下，振动发声器的面积可以尽可能的做大(一般都大于主动扬声器的有效辐射面积)，只要保证等效声质量及等效声顺不变，则不会改变无源辐射器的谐振频率，面积增大只需要将调整振动发声器的重量及折环的顺性即可，不会导致无影响安装的纵向尺寸的增加，相较于传统的六阶带通系统，本实用新型在小型系统设计中有着得天独厚的优势。At the same time, it can be seen that when conditions permit, the area of the vibration sounder can be made as large as possible (generally larger than the effective radiation area of the active speaker), as long as the equivalent sound quality and equivalent sound conformity are kept unchanged, the It will change the resonant frequency of the passive radiator, and the increase of the area only needs to adjust the weight of the vibration sounder and the compliance of the ring, which will not cause an increase in the longitudinal dimension that does not affect the installation. Compared with the traditional six-order Band-pass system, the utility model has unique advantages in small system design.

而辐射声压与辐射面积及振动速度有这样的关系：The radiation sound pressure has such a relationship with the radiation area and vibration velocity:

$P = \frac{ρf}{2 r} V_{p} S_{p}$ -----P为辐射声压，Vp为辐射器振动速度，Sp为辐射器有效辐射面积 $P = \frac{ρf}{2 r} V_{p} S_{p}$ -----P is the radiation sound pressure, Vp is the vibration velocity of the radiator, Sp is the effective radiation area of the radiator

辐射面积的增大意味着在输出同样的声压级的情况下，本实用新型所采用的无源辐射器所驱动的空气的速度将大为降低，而无源辐射器的有效辐射面积远大于传统的倒相管的面积，这就意味着在输出同样声压级的情况下，本实用新型所推动空气的振动速度远低于传统六阶带通式系统，因此本实用新型可以有效降低低频辐射失真，表现在系统在做低频重放时空气摩擦噪声大幅降低。The increase of the radiation area means that under the condition of outputting the same sound pressure level, the speed of the air driven by the passive radiator adopted in the utility model will be greatly reduced, and the effective radiation area of the passive radiator is much larger than The area of the traditional inverter tube means that under the condition of outputting the same sound pressure level, the vibration speed of the air driven by the utility model is much lower than that of the traditional sixth-order bandpass system, so the utility model can effectively reduce the low frequency Radiation distortion is manifested in the significant reduction of air friction noise when the system is performing low-frequency playback.

综合以上，本实用新型有如下优点：In summary, the utility model has the following advantages:

1、利用无源辐射器辐射面积大的特征，同等输出声压情况下，降低了空气振动速度，而改善了低频辐射失真，表现在系统在做低频重放时空气摩擦噪声大幅降低；1. Utilizing the characteristics of large radiation area of the passive radiator, under the same output sound pressure, the air vibration speed is reduced, and the low-frequency radiation distortion is improved, which is manifested in that the air friction noise is greatly reduced when the system is doing low-frequency playback;

2、由于无源辐射器的主要参数的调整与结构尺寸没有必然的关系，结够尺寸自由度相对比较高，因此在结构设计上具有较大的灵活性，尤其适合于小型声学系统的设计；2. Since the adjustment of the main parameters of the passive radiator has no necessary relationship with the structural size, the degree of freedom of the structural size is relatively high, so it has greater flexibility in structural design, especially suitable for the design of small acoustic systems;

3、因为无源辐射器将共振箱和外界空气隔开，可有效抑制共振箱内声波简正方式对系统声辐射的影响，有效降低了系统的非线性失真，3. Because the passive radiator separates the resonance box from the outside air, it can effectively suppress the impact of the normal mode of sound waves in the resonance box on the sound radiation of the system, effectively reducing the nonlinear distortion of the system.

4、具有和传统六阶带通式扬声器系统相似的频响特性。4. It has similar frequency response characteristics to the traditional sixth-order band-pass speaker system.

Claims

1, a kind of six rank band-pass loudspeaker systems with passive radiator, comprise forward and backward resonance box, the active loud speaker, it is characterized in that: the forward and backward installation on resonance box is provided with passive radiator, and this passive radiator is sealingly fastened on the forward and backward resonance box, makes passive radiator and forward and backward resonance box form the integral body of sealing.

2, six rank band-pass loudspeaker systems with passive radiator as claimed in claim 1, it is characterized in that initiatively loud speaker is traditional direct radiator type electrodynamic loudspeaker, its installation site is the dividing plate in the middle of the forward and backward cavity of resonance box, after being driven, respectively forward, the rear chamber radiative acoustic wave.

3, six rank band-pass loudspeaker systems with passive radiator as claimed in claim 2 is characterized in that initiatively loud speaker adds with the dividing plate junction to be lined with the sealing cotton.

4, six rank band-pass loudspeaker systems with passive radiator as claimed in claim 1, it is characterized in that the initiatively described resonance box of loud speaker, form by former and later two resonance boxes, passive radiator also has former and later two, preceding passive radiator is installed on the preceding resonance box, back passive radiator is logical to be installed on the resonance box of back, and two resonance boxes are by initiatively loud speaker connection.

5, as claim 1 or 4 described six rank band-pass loudspeaker systems with passive radiator, it is characterized in that the initiatively described passive radiator of loud speaker, be a kind of composite material make connect the vibration sounding device of a plane or the conical surface by the good ring of elasticity; Ring has good elasticity, and the vibration sounding utensil is prepared enough enough rigidity simultaneously.

6, six rank band-pass loudspeaker systems with passive radiator as claimed in claim 5, it is characterized in that the initiatively above-mentioned passive radiator of loud speaker, its concrete structure is: the centre is the vibration sounding device, this vibration sounding device is slab construction or pyramidal structure, the outer rim of vibration sounding device has ring, ring is to being externally connected with support, and the vibration sounding device is connected on the resonance box by support.