阅读说明：本技术 一种扩声用相位塞及其设计制造方法 (A kind of public address phase plug and its design and production method ) 是由 张祥奎 于 2019-09-30 设计创作，主要内容包括：一种扩声用相位塞,包括两个以上的环形的声波通道,所述声波通道的截面为指数型截面,各声波通道的输入口和输出口的面积之比相同,形成等传输比特性,声波在各声波通道中的模拟声路径相等,形成等相位特性。采用上述技术方案,采用指数型截面声波通道,降低声波传输过程中的失真,等传输比特性,使得声波通过本相位塞各声波通道后,在出口处形成传输效率相同的等效波阵面,等相位特性,实现声波通道输出的声波全效的耦合叠加。另外,本发明还公开该相位塞的设计制造方法。(A kind of public address phase plug, channel of acoustic wave including more than two annulars, the section of the channel of acoustic wave is exponential type section, the input port of each channel of acoustic wave and the area ratio of delivery outlet are identical, the transfer ratios characteristics such as formation, simulation acoustic path of the sound wave in each channel of acoustic wave is equal, forms equiphase characteristic.By adopting the above technical scheme, using exponential type section channel of acoustic wave, reduce the distortion during sonic transmissions, etc. transfer ratios characteristic, so that sound wave passes through after each channel of acoustic wave of this phase plug, the identical equivalent wave surface of efficiency of transmission is formed in exit, equiphase characteristic realizes the coupling superposition that the sound wave of channel of acoustic wave output is imitated entirely.In addition, invention additionally discloses the design and production methods of the phase plug.)

1. a kind of public address phase plug, it is characterised in that: the channel of acoustic wave including more than two annulars, the channel of acoustic wave Section is exponential type section, and the input port of each channel of acoustic wave and the area ratio of delivery outlet are identical, and sound wave is in each channel of acoustic wave Phase it is equal.

2. public address phase plug according to claim 1, it is characterised in that: the section of the channel of acoustic wave includes close to phase The section line q at position plug center_iWith the exponential type cross section curve y on the outside of phase plug_i, i refers to by the of phase plug center to outside I channel of acoustic wave.

3. public address phase plug according to claim 2, it is characterised in that: exponential type cross section curve y_iFunction formula be y_i=a^x, wherein a is constant and is greater than 1.

4. public address phase plug according to claim 2, it is characterised in that: simulation acoustic path of the sound wave in channel of acoustic wave d_i=q_i+c_i, wherein the input terminal of the phase plug is conical camber, and the conical camber is in the cross section curve of channel of acoustic wave C, E_iFor q_iWith the intersection point of c, c_iFor E_iAnd E₁Path length of the two o'clock on cross section curve c.

5. public address phase plug according to claim 4, it is characterised in that: E₁For the simulation point source of sound of vibrating diaphragm.

6. public address phase plug according to claim 2, it is characterised in that: S_i/s_i=b, S_iFor the defeated of i-th channel of acoustic wave Discharge area, s_iFor the input open area of i-th of channel of acoustic wave, b is constant.

7. public address phase plug according to claim 1, it is characterised in that: the phase plug includes the input of conical camber The implant in input terminal middle position is held and is located at, the outer diameter of implant is matched with the internal diameter of mid-driver, the phase plug It is implanted in mid-driver by implant, the conical camber is matched with the vibrating diaphragm of mid-driver.

8. a kind of design and production method to amplify with phase plug, it is characterised in that: by computer CAD aided drafting software, make Each annular channel of acoustic wave on phase plug meets following condition simultaneously:

(1) same exponential model: the section of channel of acoustic wave is the constant a of exponential type section and the exponential type function of each channel of acoustic wave It is equal；

(2) equiphase: simulation acoustic path of the sound wave in each channel of acoustic wave is equal；

(3) etc. transfer ratios: the input port of each channel of acoustic wave and the area ratio of delivery outlet are identical.

9. the design and production method according to claim 8 to amplify with phase plug, it is characterised in that: include the following steps:

S1: according to the technical requirements and design object of bugle loudspeaker, relevant parameter is determined；

S1-1: the Hz-KHz of reference drive, in conjunction with the target operation bandwidth f of bugle loudspeaker_Under~f_On, determine the length of bugle Spend range；

S1-2: the sensitivity of reference drive and power, combining target maximum sound pressure level can calculate the range of compression ratio；

S1-3: by compression ratio=vibrating diaphragm area/throat area, the diameter of aditus laryngis can be calculated；

S2: according to equivalent sound path simulation algorithm, by computer CAD aided drafting software, meet at the same time, etc. simulation sound travel Diameter, etc. under the conditions of transfer ratios and same exponential model three, determine the structural model and relative dimensions of phase plug.

10. the design and production method according to claim 9 to amplify with phase plug, it is characterised in that: further include following step It is rapid:

S3: with 3D printing technique, producing phase plug model, match driver, crosses baffle method of testing, soft by acoustical testing Part measures the phase response in each channel respectively, by correcting the deviation of relative dimensions repeatedly, finally makes the phase in each channel Curve approach is overlapped, and determines the accurate dimension and structure of phase plug；

S4: assembling corresponding bugle, test relevant parameter and design object parameter comparison, adjusts vibrating diaphragm and phase with annular gasket Gap between plug, to improve f_On, bugle length is adjusted with the f that extends_Under, make f_On~f_UnderReach design object；

S5: with numerical control plus center, the Split mold of each components is produced, and produces finished product；

S6: assembly pattern identical with vibrating diaphragm curvature is produced in a manner of copying with numerical control machining center；

S7: positioning wing plate is inserted into corresponding locating slot by each locating platform gluing by assembling, and with assembly pattern positioning, pressurization is straight Locating platform, which is reached, to wing plate removes assembly pattern after glue curing.

Technical field

The present invention relates to public address equipment field, especially a kind of public address phase plug and its design and production method.

Background technique

Professional public address application in, in order to improve the acvoustic units of sound pressure level SPL(volume) generally use bugle structure (see Figure).Bugle can be such that the radiation resistance loaded before driver increases, to significantly improve the efficiency of public address, sound pressure level be substantially improved. But at the same time, also usually causes acoustic interference, lead to distortion effect, public address sound quality is greatly reduced.

In order to solve this problem, common method, which is, plus phase plug structure is to reduce the acoustic interference in bugle improves sound Matter.

According to correlation theory known to horn-type loudspeaker, we can be summarized bugle loudspeaker designing technique are as follows: one A center, three basic points.

One center --- it reduces distortion rate (THD).Because distortion directly destroys the sound quality of public address, the effect of public address is influenced Fruit.

Three basic points, it is understood that be three directions of optimization design.As shown in Figure 1,

1, public address efficiency --- it depending on the compression ratio of bugle, is usually indicated with the area ratio of vibrating diaphragm and aditus laryngis: S vibrating diaphragm/S aditus laryngis

2, lower-cut-off frequency f_Under——f_UnderDepend primarily on the length (L) of bugle.But length L is too long, and distortion THD can be made to add Greatly.And cause outer dimension excessive, transport difficult.Therefore f_UnderOptimizable space it is limited.

3, upper limiting frequency f is effectively reset_On——f_Under~f_OnConstitute effective bandwidth of operation of bugle loudspeaker.f_OnDepending on phase The structure of position plug.f_OnHigher, then effective bandwidth of operation is wider.Therefore, f_OnIt will be the main direction of bugle optimization design.

Existing phase plug, has the following problems:

First, phase plug uses external-compression type, although the structure can improve intermediate frequency interference, can not solve the high frequency of mid-driver Extension problem keeps the bandwidth of bugle intermediate frequency relatively narrow, and available frequency range is limited.Frequency range is usually 300Hz-1.5kHz；It is logical Often, " front cavity " under dust cap intermediate frequency vibrating diaphragm when the vibrations are up and down, the air in preceding alveolus will be discharged by compression, form " gas Pad " effect, this will affect the vibration characteristics of vibrating diaphragm, Non-Linear Vibration be formed, so as to cause non-linear distortion；In general, public address is answered In, higher sound pressure level is needed, to keep voice transmission farther, expands public address coverage area, this will lead to input power and adds Greatly, thus intermediate frequency unit bear power also increase therewith.This will lead to voice coil temperature and improves rapidly, such as cannot effectively radiate, will Voice coil is set to overheat " burning ".

Second, channel of acoustic wave uses parallel cast, linear type, parabolic type etc., transmission distortion height.

The input open area of third, each channel of acoustic wave is different with delivery outlet area ratio, cannot make each channel realization etc. Efficiency transmission.

4th, sound wave is different in the transmission time of each channel of acoustic wave, i.e., two or more sound waves cannot trigger, simultaneously simultaneously It reaches, can not achieve the coupling superposition of sound wave imitated entirely, because phase difference forms part interference or offsets.

In conclusion needing to improve.

Summary of the invention

It is an object of the present invention to provide a kind of a kind of public address phase plug that can effectively solve the above problem and its design and manufacture Method.In order to achieve the above objectives, the present invention adopts the following technical scheme:

A kind of public address phase plug, the channel of acoustic wave including more than two annulars, the section of the channel of acoustic wave are exponential type Section, the input port of each channel of acoustic wave and the area ratio of delivery outlet are identical, and phase of the sound wave in each channel of acoustic wave is equal.

By adopting the above technical scheme, the section of channel of acoustic wave is exponential type section, and sound wave is transmitted along exponential type pipeline to spread, Compared to parallel pipe, linear type, parabolic type etc., transmission distortion is minimum.The input port of each channel of acoustic wave and the area of delivery outlet The ratio between it is identical, the transfer ratios characteristic such as form, this will make sound wave by being formed and being transmitted in exit after each channel of acoustic wave of this phase plug The identical equivalent wave surface of efficiency.Phase of the sound wave in each channel of acoustic wave is equal, i.e. simulation acoustic path is equal, because the velocity of sound is One constant, Yao Shixian phase is equal, i.e. simulation acoustic path wants equal, then achievable acoustic transit time is equal, i.e. equiphase, phase When in pull(ing) effect.I.e. two or more sound waves are triggered while being reached simultaneously.Theoretically, equiphase is to constitute sound wave to imitate coupling entirely The necessary condition of conjunction.That is: there was only the sound wave of same phase characteristic, be just able to achieve the coupling superposition imitated entirely, it otherwise, then can be because of phase Difference forms part interference or offsets.

Further, the section of the channel of acoustic wave includes the section line q close to phase plug center_iOutside close phase plug The exponential type cross section curve y of side_i, i refers to i-th of channel of acoustic wave by phase plug center to outside.

Further, exponential type cross section curve y_iFunction formula be y_i=a^x, wherein a is constant and is greater than 1.Each sound wave Channel must comply with same y=a^xExponential model, the sound transmission characteristics to ensure each channel are consistent.This will be effective Reduce sound wave each channel of acoustic wave exit coupling be distorted.

Further, simulation acoustic path d of the sound wave in channel of acoustic wave_i=q_i+c_i, wherein the input terminal of the phase plug For conical camber, the conical camber is c, E in the cross section curve of channel of acoustic wave_iFor q_iWith the intersection point of c, c_iFor E_iAnd E₁Two o'clock exists Path length on cross section curve c.Simulation acoustic path of the sound wave in each channel of acoustic wave is given herein, because of sound transmission Speed is constant, thus it is only equal with the simulated sound path distance in each channel of acoustic wave, then the equiphase of sound wave can be achieved, this Abstract theoretical materialization is provided concrete implementation mode for the equiphase of sound wave by place.

Further, E₁For the simulation point source of sound of vibrating diaphragm.Driver is located at the object of voice coil as sound source, theoretical point source of sound Manage central point.This phase plug input terminal is equipped with conical camber, with matching for driver diaphragm, it is assumed that voice coil and its skeleton are Rigid body, then E₁The as simulation point source of sound of vibrating diaphragm.

Further, S_i/s_i=b, S_iFor the output open area of i-th of channel of acoustic wave, s_iFor the input of i-th of channel of acoustic wave Open area, b are constant.If being equipped with 3 channel of acoustic wave, transfer ratios principle, three channel of acoustic wave input ports and the delivery outlet such as foundation Area ratio it is identical, then the transfer ratio in 3 channels is equal, then S₁/s₁= S₂/s₂= S₃/s₃。

Further, the phase plug includes the input terminal of conical camber and is located at the implant in input terminal middle position, The outer diameter of implant is matched with the internal diameter of mid-driver, and the phase plug is implanted in mid-driver by implant, institute Conical camber is stated to match with the vibrating diaphragm of mid-driver.

It is designed, is had the advantage that using implanted, first, taper whole film driver, high frequency sound-emanating areas concentrates on Center portion position, is designed by implantable structure, can get more high frequency responses, effective extension frequency upper limit f_On, to make bugle Effective bandwidth of operation increase.Second, the piston vibration of vibrating diaphragm can be made pliable best.External-compression type is avoided, because of the gas in convex cap Pad effect, caused by non-linear distortion.Third, implanted can make voice coil by forming circular passage with implant part, and outer Boundary communicates.In work, by piston vibration, convection type heat dissipation is formed.It can effectively reduce because temperature rise causes thermal losses and crosses heat waste It ruins.The working efficiency and reliability of lifting system.

A kind of design and production method to amplify with phase plug makes on phase plug by computer CAD aided drafting software Each annular channel of acoustic wave meets following condition simultaneously:

(1) same exponential model: the section of channel of acoustic wave is the constant a of exponential type section and the exponential type function of each channel of acoustic wave It is equal；

(2) equiphase: simulation acoustic path of the sound wave in each channel of acoustic wave is equal；

(3) etc. transfer ratios: the input port of each channel of acoustic wave and the area ratio of delivery outlet are identical；

It is particularly applicable in design and manufacture, including the following steps:

S1: according to the technical requirements and design object of bugle loudspeaker, relevant parameter is determined；

S1-1: the Hz-KHz of reference drive, in conjunction with the target operation bandwidth f of bugle loudspeaker_Under~f_On, determine the length of bugle Spend range；

S1-2: the sensitivity of reference drive and power, combining target maximum sound pressure level can calculate the range of compression ratio；

S1-3: by compression ratio=vibrating diaphragm area/throat area, the diameter of phase plug outlet (i.e. aditus laryngis) can be calculated；

S2: according to equivalent sound path simulation algorithm, by computer CAD aided drafting software, meet at the same time, etc. simulation sound travel Diameter, etc. under the conditions of transfer ratios and same exponential model three, that is, can determine the structural model and relative dimensions of phase plug.

Further, on the basis of the above-described procedure, further include the following steps:

S3: with 3D printing technique, producing phase plug model, match driver, crosses baffle method of testing, soft by acoustical testing Part measures the phase response in each channel respectively, by correcting the deviation of relative dimensions repeatedly, finally makes the phase in each channel Curve approach is overlapped, and phase curve, which is overlapped, illustrates that phase is equal, can finally determine the accurate dimension and structure of phase plug；

S4: assembling corresponding bugle, test relevant parameter and design object parameter comparison, adjusts vibrating diaphragm and phase with annular gasket Gap between plug, to improve f_On, bugle length is adjusted with the f that extends_Under, make f_On~f_UnderReach design object；

S5: with numerical control plus center, the Split mold of each components is produced, and produces finished product；

S6: assembly pattern identical with vibrating diaphragm curvature is produced in a manner of copying with numerical control machining center；

S7: positioning wing plate is inserted into corresponding locating slot by each locating platform gluing by assembling, and with assembly pattern positioning, pressurization is straight Locating platform, which is reached, to wing plate removes assembly pattern after glue curing.

In conclusion being had the advantage that using technical solution of the present invention

Implantable structure --- non-linear distortion is effectively reduced, radiating efficiency is improved, increases system reliability, extends f_On。

Same exponential type transmission structure --- channel of acoustic wave is respectively segmented, same exponential model waveguide structure is all made of, makes sound Wave transfer characteristic is consistent and distortion minimization.

Deng phase transmission design --- the proposition equivalent simulation algorithm of innovation enormously simplifies the calculating of acoustic path, is each sound Realize that equiphase and coupling superposition lay the foundation in wave channel.

Etc. transfer ratios design --- the transfer ratios concept such as proposition of innovation.Each channel of acoustic wave is set to realize equal efficiency transmissions.

Detailed description of the invention

Fig. 1 is SPL-f curve graph.

Fig. 2 is the stereoscopic schematic diagram of phase plug.

Fig. 3 is the assembling schematic diagram of phase plug and mid-driver.

Fig. 4 is the channel of acoustic wave input port schematic diagram of phase plug input terminal.

Fig. 5 is the channel of acoustic wave delivery outlet schematic diagram of phase plug output end.

Fig. 6 is the schematic diagram of loudspeaker.

The schematic diagram of Fig. 7 phase plug manufacturing process.

Fig. 8 is the overlooking surface view of Fig. 7.

Fig. 9 is the schematic diagram that phase plug manufacturing process installs pattern.

Figure 10 is y=a^xExponential model coordinate model figure.

Figure 11 is the phase response curve table of each channel of acoustic wave.

Figure 12 is that the direction of this phase plug tests table.

Figure 13 is the efficiency test table of this phase plug.

Figure 14 is the distortion measurement table of this phase plug.

Specific embodiment

In the following, the present invention will be described in conjunction with specific embodiment.

As shown in Figure 2,3, a kind of public address phase plug 1, the channel of acoustic wave including more than two annulars, specifically, In In the present embodiment, there are three the channel of acoustic wave of annular, from center to periphery respectively channel of acoustic wave K for the setting of phase plug 1₁, sound wave Channel K₂And channel of acoustic wave K₃。

In above three channel of acoustic wave, the section of channel of acoustic wave is the exponential type letter of exponential type section and each channel of acoustic wave Several constant a equal (referred to as same exponential model), the input port of each channel of acoustic wave and the identical (title of the area ratio of delivery outlet For etc. transfer ratios), simulation acoustic path of the sound wave in each channel of acoustic wave is equal (referred to as equiphase).

For the feature of same exponential model, each channel of acoustic wave is using following design:

As shown in Fig. 3,4,5,10, the section of channel of acoustic wave includes the section line q close to 1 center of phase plug_iWith close phase plug 1 The exponential type cross section curve y in outside_i, i refers to by i-th of channel of acoustic wave at 1 center of phase plug to outside.Exponential type cross section curve y_i Function formula be y_i=a^x, wherein a is constant and is greater than 1.The channel of acoustic wave being each made of l/L, it is necessary to follow the same y= a^xExponential model, i.e. channel of acoustic wave K₁, channel of acoustic wave K₂And channel of acoustic wave K₃In a be identical value, to ensure each The sound transmission characteristics in channel are consistent.This will effectively reduce coupling of the sound wave in each channel of acoustic wave exit and is distorted.

For the feature of equiphase (or waiting acoustic paths), each channel of acoustic wave is using following design:

As shown in figure 3, the simulation acoustic path d of channel of acoustic wave_i=q_i+c_i, wherein the input terminal of phase plug 1 is conical camber, taper Curved surface is c, E in the cross section curve of channel of acoustic wave_iFor q_iWith the intersection point of c, c_iFor E_iAnd E₁Path length of the two o'clock on cross section curve c Degree.At three channel of acoustic wave of the present embodiment, E₁For the simulation point source of sound of vibrating diaphragm 5, E₀For the theoretical point source of sound of vibrating diaphragm 5, Simulate acoustic path d₁For curve E₁O₁, simulate acoustic path d₂For curve E₁E₂+E₂O₂, simulate acoustic path d₃For curve E₁E₃+E₃O₃, because This, d₁= d₂= d₃And E₁O₁= E₁E₂+E₂O₂= E₁E₃+E₃O₃。

Simulation acoustic path of the sound wave in each channel of acoustic wave, because sound propagation velocity is constant, institute are given herein With only equal with the simulated sound path distance in each channel of acoustic wave, then the equiphase of sound wave can be achieved, herein by abstract reason By materialization, concrete implementation mode is provided for the equiphase of sound wave.E₁For the simulation point source of sound of vibrating diaphragm 5.Driver conduct Sound source, theoretical point source of sound are located at physical centre's point of voice coil.1 input terminal of this phase plug is equipped with conical camber, with driver Vibrating diaphragm 5 matches, it is assumed that voice coil and its skeleton are rigid body, then E₁The as simulation point source of sound of vibrating diaphragm 5.

For etc. transfer ratios feature, each channel of acoustic wave is using following design:

As in Figure 3-5, S_i/s_i=b, S_iFor the output open area of i-th of channel of acoustic wave, s_iFor the input of i-th of channel of acoustic wave Open area, b are constant.If being equipped with 3 channel of acoustic wave, transfer ratios principle, three channel of acoustic wave input ports and the delivery outlet such as foundation Area ratio it is identical, then the transfer ratio in 3 channels is equal, then S₁/s₁= S₂/s₂= S₃/s₃。

In addition, as shown in Figure 1, 2, as a preferred scheme, phase plug 1 is designed using the structure of implanted, implantation Into mid-driver 2, specifically, phase plug 1 includes the input terminal of conical camber and the implantation for being located at input terminal middle position The outer diameter of body 3, implant 3 is matched with the internal diameter of mid-driver 2, and phase plug 1 is implanted to mid-driver 2 by implant 3 In, conical camber is matched with the vibrating diaphragm 5 of mid-driver 2.

In addition, amplifying the present invention provides one kind in order to manufacture while meeting the phase plug 1 of above-mentioned each characteristic and using phase plug 1 design and production method, specific as follows:

S1: according to the technical requirements and design object of bugle loudspeaker, relevant parameter is determined；

S1-1: the Hz-KHz of reference drive, in conjunction with the target operation bandwidth f of bugle loudspeaker_Under~f_On, determine the length of bugle Spend range；

S1-2: the sensitivity of reference drive and power, combining target maximum sound pressure level can calculate the range of compression ratio；

S1-3: by compression ratio=5 areas of vibrating diaphragm/throat area, the diameter that phase plug 1 exports (i.e. aditus laryngis) can be calculated；

S2: according to equivalent sound path simulation algorithm, by computer CAD aided drafting software, meet at the same time, etc. simulation sound travel Diameter (E₁O₁= E₁E₂+E₂O₂= E₁E₃+E₃O₃), etc. transfer ratios (S₁/s₁= S₂/s₂= S₃/s₃) and same exponential model (y_i=a^x, A value is identical) under the conditions of three, that is, it can determine the structural model and relative dimensions of phase plug 1.Again by acoustical testing software, lead to Cross actual test 1,2,3, the phase response curve in channel, the structure of auxiliary fine tuning orrection phase place plug.Finally make the phase in 3 channels Position curve co-insides, phase curve, which is overlapped, illustrates that phase is equal, illustrates that effective acoustic path in 3 channels is equal.So far, it is exporting The phases wave surfaces such as place, the full effect of each channel sound wave, which couples, to be superimposed, and Formation and characteristics are consistent.Theoretically, phases wave surface is waited, by the number of making The directive property of cylinder controls uniformity, and minimum because being distorted caused by interference.Figure 11 is the phase response curve of each channel of acoustic wave Table, in table, 1,2,3 be K₁、K₂、K₃The phase response curve that channel is individually connected, 1+2+3 K₁、K₂、K₃Channel simultaneously turns on Phase response curve, as seen from table.4 lines essentially coincide, and illustrate each channel equiphase.

S3: with 3D printing technique, 1 model of phase plug is produced, matches driver, baffle method of testing is crossed, is surveyed by acoustics Software is tried, the phase response in each channel is measured respectively, by correcting the deviation of relative dimensions repeatedly, finally makes each channel Phase curve approach is overlapped, and can finally determine the accurate dimension and structure of phase plug 1；

S4: as shown in fig. 6, corresponding bugle is assembled, test relevant parameter and design object parameter comparison, with the tune of annular gasket 6 Gap between vibrating diaphragm 5 and phase plug 1 is saved, to improve f_On, adjust bugle length L_hWith extension f_Under, make f_On~f_UnderReach design mesh Mark；

S5: with numerical control plus center, the Split mold of each components is produced, and produces finished product；

S6: as Figure 7-9, assembly identical with 5 curvature of vibrating diaphragm is produced in a manner of copying with numerical control machining center Pattern 9；

S7: positioning wing plate 7 is inserted into corresponding locating slot 8, is positioned, added with assembly pattern 9 by each 4 gluing of locating platform by assembling Straightening to wing plate reaches locating platform 4, after glue curing, removes assembly pattern 9.

By adopting the above technical scheme, three channel of acoustic wave use same exponential model, and compared to parallel pipe, linear type is thrown Object line style etc., transmission distortion is minimum, and a value is identical in each exponential model, and the sound transmission characteristics to ensure each channel are consistent. This will effectively reduce coupling of the sound wave in each channel of acoustic wave exit and is distorted.

The transfer ratios such as three channel of acoustic wave, this will make sound wave by being formed after each channel of acoustic wave of this phase plug 1 in exit The identical equivalent wave surface of efficiency of transmission.

Three channel of acoustic wave equiphases (etc. acoustic paths), equiphase is equivalent to pull(ing) effect, i.e., two or more sound waves are same When triggering, reach simultaneously because the velocity of sound is a constant, Yao Shixian phase is equal, i.e. simulation acoustic path wants equal, then achievable sound Wave transmission time is equal, and theoretically, equiphase is the necessary condition for constituting sound wave and imitating coupling entirely.That is: there was only same phase characteristic Sound wave, be just able to achieve imitate entirely coupling superposition, otherwise, then can be formed because of phase difference part interference or offset.

It is designed, is had the advantage that using implanted, first, taper whole film driver, high frequency sound-emanating areas concentrates on Center portion position, is designed by implantable structure, can get more high frequency responses, effective extension frequency upper limit f_On, to make bugle Effective bandwidth of operation increase.Second, the piston vibration of vibrating diaphragm 5 can be made pliable best.External-compression type is avoided, because of the gas in convex cap Pad effect, caused by non-linear distortion.Third, implanted can make voice coil by forming circular passage with implant part, and outer Boundary communicates.In work, by piston vibration, convection type heat dissipation is formed.It can effectively reduce because temperature rise causes thermal losses and crosses heat waste It ruins.The working efficiency and reliability of lifting system.

To sum up, using technical solution of the present invention, in conjunction with attached drawing 12-14 it is found that the present invention has the following advantages:

Implantable structure --- non-linear distortion is effectively reduced, radiating efficiency is improved, increases system reliability, extends f_On。

Same exponential type transmission structure --- channel of acoustic wave is respectively segmented, same exponential model waveguide structure is all made of, makes sound Wave transfer characteristic is consistent and distortion minimization.

Deng phase transmission design --- the proposition equivalent simulation algorithm of innovation enormously simplifies the calculating of acoustic path, is each sound Realize that equiphase and coupling superposition lay the foundation in wave channel.

Etc. transfer ratios design --- the transfer ratios concept such as proposition of innovation.Each channel of acoustic wave is set to realize equal efficiency transmissions.

The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field For art personnel, the present invention can have various changes, combination and variation, be especially in the presence of foozle, each sound wave of phase plug Channel can not accomplish the exponential model that transfer ratio is essentially equal, equiphase (simulation acoustic path is equal), in different channel of acoustic wave In a be also likely to be present error, but all within the spirits and principles of the present invention, any modification, equivalent replacement, improvement Deng should be included within scope of the presently claimed invention.