CN1977564A - Acoustic transducer comprising a plurality of coaxially arranged diaphragms - Google Patents

Abstract

An acoustic transducer comprises one or more electromagnetic motors that drive one or more sets of multiple diaphragms to provide acoustically efficient loudspeaker systems having dimensions that allow use in applications that would be difficult or impossible with traditional transducers. The diaphragms may be driven directly, inertially or fluidically. If diaphragms are driven by rods that pass through holes in the diaphragms, noise may be generated by air that leaks through the pass-through holes. This noise may be reduced or eliminated by measures that reduce or eliminate the air leakage.

Description

The sonic transducer that comprises the vibrating membrane of a plurality of coaxial arrangement

Technical field

The present invention relates to audion system and field of acoustics, relate more specifically to provide that a kind of to be used in electrical signal conversion be improved form factor on the sonic transducer of acoustic radiation.

Background technology

Extensively understood the General Principle of moving coil formula electrodynamic loudspeaker.It is the thought of swept volume that transducer has the core that produces this performance of sound.The effective surface area that swept volume with transducer of single vibrating membrane equals vibrating membrane multiply by the side-play amount of this vibrating membrane.The swept volume of transducer is big more, and its sonorific potential is big more.Need under low frequency, produce big swept volume especially.The conventional method that is used at the bigger swept volume of transducer acquisition is to improve the surface area of vibrating membrane, improve the side-play amount of vibrating membrane or improve the two.

The traditional transducers that is used to produce effective low frequency energy comprises having than the single vibrating membrane of high surface area and adopt motor and housing provides enough vibrating membrane skews.This causes the requirement loudspeaker vibrating diaphragm to have certain minimum dimension, and this proposes mandatory requirement to the minimum dimension of speaker housings again.It is very difficult adopting the traditional transducers with good LF-response in the application of for example panel TV and computer monitor.In these were used, present solution was to adopt independent sub-woofer speaker audio amplifier to duplicate low-frequency sound, thereby caused cost to increase and make troubles.Have same problem in the car audio system that is applied in usually on the luggage case or below the seat, the designer strives to find one sub-woofer speaker is hidden in place on the automobile.

Summary of the invention

The purpose of this invention is to provide a kind of sonic transducer that can in the application that traditional transducers is difficult to satisfactorily resolve, under high sound pressure level, duplicate Hi-Fi low-frequency sound.

According to an aspect of the present invention, the sounding surf zone of sonic transducer passes a plurality of vibrating membranes with form factor and distributes, and this form factor for example is more suitable for being applied on the panel TV and computer monitor and car audio system.These vibrating membranes can be divided into one or more groups, and every group vibrating membrane drives by at least one motor synchronous that in this group all vibrating membranes is connected.Can adopt the vibrating membrane in one group of any motor-driven that electric audio signal can be converted to motion.For example, can adopt the motor of forming by mobile voice coil loudspeaker voice coil and non-moving magnet.

The embodiment of sonic transducer described here adopts the single motor that drives all vibrating membranes or the housing of all vibrating membranes is installed, and perhaps adopts two motors, half vibrating membrane of each motor-driven.In theory, the quantity of motor is not subjected to the constraint of the quantity of vibrating membrane fully.For example, sonic transducer can have one by the group of two motor-driven four vibrating membranes and by the group of motor-driven another three vibrating membranes.

Each drive motors can directly or indirectly link to each other with all vibrating membranes of its driving.Can be by motor directly be connected housing housing realize being connected indirectly by being connected on the vibrating membrane or by gaseous state or fluid liquid that employing links to each other motor and vibrating membrane around part or suspension.All motors on concrete sonic transducer can receive identical substantially audio signal and can be one another in series or parallel connection.

The material that adopts in the structure of numerous embodiments of the present invention can be the material that adopts in the structure of typical sonic transducer.The housing of connecting rod and motor can be made by the material that resonance, vibration or beam mode have a characteristic frequency, and described characteristic frequency is causing outside the sound spectrum of noting.Because these parts preferably are not the parts of sound generating mechanism, so the employing pattern is in the material that causes in the sound spectrum of noting and may causes the artificial audio frequency product that do not meet the requirements.Preferably, mobile member for example made to improve the efficient of device by light as far as possible material by vibrating membrane and connecting rod.For example, can adopt the polypropylene-polyphenylene-oxide-styrene materials or the carbon fibre material of filling glass or filling mica.

Execution mode described here adopts the tubulose form factor with cylindrical shell and Round Membranes; Yet it is circular that the cross section of housing and vibrating membrane needs not to be.They can be ellipse, rectangle or any substantially other required shapes.

Improving many aspects of the present invention need increase complexity and optional feature, can increase manufacturing cost like this and reduce the reliability of transducer.Can be by adopting the modularized design alleviation or avoiding these problems, in described modularized design, for example comprise magnet assemblies, coil and vibrating membrane or conical diaphragm, comprise housing section, vibrating membrane and be connected one group of bar on the vibrating membrane in this module that is called another type of vibrating membrane module in this module of one type that is called motor module.Motor module is designed to and vibrating membrane module coupling, and can comprise one group of bar, and described bar is connected the motor in the motor module with diaphragm mechanical in the adjacent vibrating membrane module.Alternatively, motor module can comprise the vibrating membrane that is connected with vibrating membrane fluid in the adjacent vibrating membrane module.The vibrating membrane module also is designed to and another vibrating membrane module coupling.Any amount of substantially vibrating membrane module can be assembled into linearly aligned module.Bar in each vibrating membrane module passes the opening in the vibrating membrane module of direct neighbor and is connected with diaphragm mechanical in next vibrating membrane module.Housing section in each vibrating membrane module be suitable for and adjacent vibrating membrane module in housing section coupling between module, to form the chamber.Air in respective chamber is acoustically acoustically linking to each other with the air of outside with air insulated or through port, hole or other openings of outside.

Sonic transducer according to the present invention produces positive ground roll and back ground roll.Consider transducer in advance usually by the housings close with opening, described opening suitably is orientated with respect to the hearer, and positive ground roll can pass described opening and discharge.Have many well-known methods to be used for handling the back ground roll of standard sonic transducer, any means in those methods can be used to the present invention.For example, back ground roll can pass the waveguide wire that introduce to postpone and discharge, and it can enter in the big packaging part as dividing plate, and perhaps it can directly enter in the surrounding air.Back one method reduces the audio of transducer under the low frequency usually.

The overall dimension of sonic transducer greatly depends on the audio grade under the required low frequency according to the present invention.Surface area that can be by increasing each vibrating membrane, the skew by increasing each vibrating membrane, the quantity by increasing vibrating membrane, by optimization of matching between vibrating membrane and air acoustic impedance or the combination in any by these factors obtain higher audio.

According to an instruction of the present invention, transducer comprises by employing and is connected the single motor that single drive rod on each vibrating membrane activates a plurality of vibrating membranes.One side of each vibrating membrane is to leading to the opening of acoustic surrounding.The opposite side of each vibrating membrane is isolated by dividing plate and acoustic surrounding.Drive rod can pass the opening on the dividing plate and/or on the vibrating membrane.Can adopt the escape of air that do not meet the requirements of seal to produce on any opening that prevents or be reduced in basically drive rod and can pass.

According to another instruction of the present invention, transducer comprises two motors, and each motor activates a plurality of vibrating membranes.Vibrating membrane is arranged to two groups; Vibrating membrane in one group by the vibrating membrane in a motor-driven and another group by another motor-driven.Preferably, the vibrating membrane group reciprocally is driven.By the motor that adopts drive rod vibrating membrane is activated.Drive rod can pass the opening on the dividing plate and/or on the vibrating membrane.Disadvantageously, air can pass these openings leakages and cause a large amount of intermodulation distortion and harmonic distortion.This leakage also can significantly reduce the voice output grade.Can adopt seal to prevent from any opening of the vibrating membrane that bar can pass, to produce the escape of air that does not meet the requirements.

These seals can be formed by one or more light foam, every foam be compressible and expandable and near the opening attached to bar on.A foam compresses when bar pushes it against opening, and expands when bar pushes away opening with it.These seals can also be made by the fabric that the fold fabric for example adopts on bellows, and it can expand and shrink as requested.Alternatively, drive rod can extend (route) makes them not pass any vibrating membrane or dividing plate, saves seal thus.

Have the execution mode of the drive rod that passes vibrating membrane and/or dividing plate for those, because seal increases cost and the complexity of implementing, it is satisfactory therefore avoiding adopting seal.The vibrating membrane that this point can be passed by the design driven bar and/or the size of the opening on the dividing plate realize to optimize overall performance.These openings are referred to herein as " pass through openings ".Any escape of air that passes the pass through openings generation on the vibrating membrane all can produce the artifacts who does not meet the requirements of audio frequency distortion or form of noise and/or reduce overall air volume discharge capacity.Can make it produce the artifacts that littler audible noise reduces these escape of airs to the resistance of air flows or by the air that diffuses through opening by increasing opening.For example can be by increasing path that air must move or increasing described resistance by the size that reduces opening.Several technology that are used to reduce the escape of air noise have been described in following paragraph; These technology can adopt or make up employing separately to obtain required result.

According to a kind of technology, increase resistance to air flows by the length that adopts thicker vibrating membrane to increase the air mobile route.The common effect of this point is to increase the quality of vibrating membrane and reduce maximum offset under the given overall transducer volume.

According to another kind of technology, increase vibrating membrane thickness by " interlayer " that adopts two vibrating membranes, between two vibrating membranes, have for example viscoelastic polymer layer of sound-absorbing material layer.Resulting composite membrane vibration is by the height damping, and this point is satisfactory because helping to reduce artificial sound product on the sonic transducer of being everlasting.The existence of sound-absorbing material can be formed vibrating membrane by lighter material, and reduced the transducer moving mass thus increases undesirablely.

According to another kind of technology, by adopt non-stretchable skin material for example paper and lightweight interval insulant for example " interlayer " of polyurethane foam improve vibrating membrane thickness.Resulting composite membrane vibration is lighter and harder than monolithic vibrating membrane usually.

According to another kind of technology, by increase the resistance of cylinder " sleeve " increase to vibrating membrane to air flows around pass through openings.The employing of sleeve has reduces to minimum additional effect with the increase of vibrating membrane quality.Preferably in the sleeve-shaped difference of vibrating membrane both sides.For example, on the lateral surface of the vibrating membrane that transmits the positive ground roll of sound heard by the hearer, cylindrical sleeves can shape such as the funnel turbulence noise of passing the air of opening with reduction.

According to another kind of technology, improve resistance to air flows by increasing the sleeve of making around the material by anti-air flows of pass through openings.The internal diameter of these sleeves can be enough little so that sleeve slightly closely around the drive rod assembling of passing opening.Be used for the material of these sleeves preferably soft and smooth reduce undesirable frictional noise when contacting to form with drive rod at sleeve, and described material has enough anti-air flow property are passed opening with reduction air capacity.The example of suitable material comprises fabric, polyester, soft wool of being made by silk and the other materials that makes up with elastic fabric.These soft fabric sleeve are preferably around for example plastics or metal shorter cylindrical sleeves are installed by hard material.

The other method that is used to reduce the escape of air noise is to utilize to stop effectively that air flows will rub simultaneously and noise is reduced to minimum material seal pass through openings.The example of these materials comprises that bellows and the semi-fluid made by soft flexible fabric move for example thixotropic gel of lubricant.Can obtain similar effects by between bar and sleeve, adopting ferromagnetic fluid.Can ferromagnetic fluid be remained on the appropriate location by the thin annular magnet that is connected on the vibrating membrane.

The other method that is used to reduce the escape of air noise is to make the air diffuser of passing opening.A kind of technology that is used to realize this point is that the discharge point in inlet air flow path increases soft foam.Particularly, can be directly around pass through openings or indirectly around for example plastics or metal shorter cylindrical sleeves increase soft foam cylinder by hard material.Foam can be constructed such that it extends and curves inwardly above rigid sleeve, thereby it covers opening and almost touches drive rod.Foam can be polyurethane open modular (open cell) foam, and it has the characteristic that required diffused air when contacting with drive rod formation reduces the frictional noise that does not meet the requirements simultaneously.Preferably foam only is arranged on the medial surface of vibrating membrane in some applications, transmits the back ground roll of the unheard sound of hearer.Can adopt longer foam sleeve like this with littler internal diameter.These foam sleeves can more closely contact drive rod, thereby they have also increased the resistance to air flows except making the air diffuser of passing opening.The tightr contact of drive rod has improved frictional noise but this noise is included in the ground roll of back, therefore can not bring discomfort for the hearer.

Can the combination by above-mentioned technology reduce the escape of air noise, that is to say, increase sleeve and increase the thickness of vibrating membrane itself to vibrating membrane.

The composite membrane vibration that the example of this combination technique is made up of two vibrating membrane interlayers by formation increases the resistance to air flows, wherein each vibrating membrane only has at the cylindrical sleeves of its lateral surface around pass through openings, has sound-absorbing material layer between two vibrating membranes.Can customize the recruitment of reduction amount, moving mass of escape of air noise and vibrating membrane damping amount is applicable to the length by the thickness of regulating sound-absorbing material layer, the thickness that divides vibrating membrane and sleeve and almost is assemblied in any application.

Another example that is used to reduce escape of air artifacts's combination technique is soft foam and the soft fabric sleeve that increases around pass through openings.Particularly, can increase soft foam and increase soft fabric, combine increase thus the resistance of air flows and these two effects of air that diffuse through opening around rigid sleeve around foam.

Another example that is used to reduce escape of air artifacts's combination technique is the seal cartridge that adopts around bar.Lining preferably by the material of very low friction for example the self-lubricating polymer make.Lining preferably is connected on the vibrating membrane by flexible airtight material, thereby allows limited move and make vibrating membrane and vibration to isolate.

The above-mentioned technology that is used to reduce the escape of air noise can be applied in to adopt on it has the vibrating membrane in hole or any transducer of conical diaphragm.These technology are not limited to the transducer that adopts a plurality of vibrating membranes and arrange.

According to another instruction of the present invention, transducer comprises the motor of the one or more structures of direct actuating, and each structure comprises a plurality of vibrating membranes that hang by around part, support or other forms of suspension.The back ground roll of each vibrating membrane is acoustically being isolated with adjacent vibrating membrane by dividing plate.The positive ground roll of each vibrating membrane can pass opening and arrive acoustic surrounding.Do not adopt any drive rod, vibrating membrane obtains inertia-activated as an alternative.This instruction can expand to adopts a plurality of motors.In addition, can be along reciprocally moving different structures.

According to another instruction of the present invention, each drive motors links to each other with single diaphragm mechanical.This vibrating membrane links to each other with another vibrating membrane by fluid, and another vibrating membrane links to each other with other diaphragm mechanical again.Like this, can adopt one or more conventional loud speakers to drive a plurality of vibrating membranes indirectly.If air connects to adopt pneumatic fluid for example to connect between the vibrating membrane of vibrating membrane that directly drives and driving indirectly, the vibrating membrane operation that drives indirectly is as they drivings by the signal that passes the filter with low-pass characteristic, and the vibrating membrane that directly drives operation is as they drivings by the signal with whole frequency range.In for example such execution mode, the vibrating membrane that the direct vibrating membrane that drives sends most high-frequency sound and driving indirectly sends most low-frequency sound.

According to another instruction of the present invention, the transducer with housing comprises a plurality of vibrating membrane modules, and each vibrating membrane module has housing section, be suspended on the vibrating membrane on the housing section and be connected one group of one or more bar on the vibrating membrane.The housing section that is used for the corresponding vibration film module has first surface and opposing second surface.The first surface of the housing section in a vibrating membrane module is designed to as follows the second surface coupling with housing section in another vibrating membrane module, promptly forms the chamber between the corresponding vibration film of adjacent block.The housing section of module can have mouthful, the opening of hole or other types, so that the air in the chamber can acoustically link to each other with air outside the chamber.Bar in each vibrating membrane module passes the opening in the vibrating membrane module of direct neighbor and links to each other with diaphragm mechanical in next vibrating membrane module.In one embodiment, apparent surface outstanding and vibrating membrane has the fixture of the boom end that is suitable for holding and mate the module that is close to adjacent block to the bar group in module from a surface of vibrating membrane.At another execution mode, first group of bar is outstanding and second group of bar is outstanding from the apparent surface of vibrating membrane from a surface of corresponding vibration film.The end of two groups of king-rods is suitable for mutual coupling.

According to another instruction of the present invention, above-mentioned vibrating membrane module does not have the bar that links to each other with vibrating membrane.Each vibrating membrane module is made up of housing section and the vibrating membrane that is suspended on the housing section.After the middle part of transducer was assembled by a plurality of such vibrating membrane modules, bar was inserted into and utilizes combined process for example to glue together or sonic welded is connected on the suitable vibrating membrane, and one or more motor module is connected the end at transducer middle part.

In above-mentioned any execution mode, can increase sleeve or vibrating membrane can be the composite membrane vibration that is made of two vibrating membranes around through hole, between two vibrating membranes, sandwich sound-absorbing material layer.The interlayer vibrating membrane can also be included in cylindrical sleeves on its one or two face to reduce undesirable escape of air noise.

In above-mentioned any execution mode, the vibrating membrane suspension does not need all have identical attribute or orientation.For example, directly driving in the execution mode of vibrating membrane, adopting harder suspension near the motor so that meeting the requirements along the mobile minimum of reducing on the direction outside the drive rod direction of actuation.In addition, by being orientated to some suspensions by the vibrating membrane suspension that single motor activates, can eliminate or reduce the asymmetric property of suspension, thereby can reduce the distorted characteristic of transducer towards the direction opposite with respect to other suspensions.

By reference the following description and drawings each feature and the preferred implementation thereof that the present invention may be better understood.The content of the following description and drawings is suggested and should be understood as that as just example and limits the scope of the present invention.

Description of drawings

Fig. 1 is the schematic diagram that adopts the embodiment of the present invention of dividing plate, single interior drive rod and single motor.

Fig. 2 is the schematic diagram that does not adopt dividing plate, adopts the embodiment of the present invention of a plurality of interior drive rods and two motors.

Fig. 3 is the schematic diagram that adopts the embodiment of the present invention of dividing plate, a plurality of outer drive rod and single motor.

Fig. 4 is the schematic diagram that does not adopt dividing plate, adopts the embodiment of the present invention of a plurality of outer drive rods and two motors.

Fig. 5 is the schematic diagram that does not adopt drive rod, adopts the embodiment of the present invention of dividing plate and single motor.

Fig. 6 A-6C is the schematic diagram that is used to make the vibrating membrane module of sonic transducer of the present invention.

Fig. 7 is the perspective schematic view that adopts vibrating membrane module such shown in Fig. 6 A-6C to realize the execution mode that mechanical connection drives according to having of sonic transducer of the present invention.

Fig. 8 is the schematic cross section of transducer shown in Figure 7.

Fig. 9 adopts vibrating membrane module such shown in Fig. 6 A-6C to realize that fluid connects the perspective schematic view of the execution mode that drives according to having of sonic transducer of the present invention.

Figure 10 is the schematic cross section of transducer shown in Figure 9.

The schematic diagram of the composite membrane vibration that Figure 11 A-11C is made up of two vibrating membranes, sound-absorbing material layer is clipped between described two vibrating membranes.

Figure 12 A-12C is the schematic diagram that has around the vibrating membrane module of the cylindrical sleeves of pass through openings.

The schematic diagram of the composite membrane vibration that Figure 13 A-13C is made up of two vibrating membranes, each vibrating membrane only has the cylindrical sleeves around pass through openings on its lateral surface, and sound-absorbing material layer is clipped between described two vibrating membranes.

Figure 14 A-14B has around the cylindrical sleeves of pass through openings with around the schematic diagram of the vibrating membrane of the soft fabric sleeve of cylindrical sleeves.

Figure 15 A-15B has around the cylindrical sleeves of pass through openings with around the schematic diagram of the vibrating membrane of the soft foam sleeve of cylindrical sleeves.

Figure 16 A-16B be have cylindrical sleeves around pass through openings, around the soft foam sleeve of cylindrical sleeves and around the schematic diagram of the vibrating membrane of the soft fabric sleeve of foam sleeve.

Figure 17 A-17B has have cylindrical sleeves around pass through openings on the vibrating membrane lateral surface on around the infundibulate cylindrical sleeves of pass through openings and the medial surface at vibrating membrane, having the schematic diagram around the vibrating membrane of the soft foam sleeve of cylindrical sleeves.

Figure 18 A-18B is the schematic diagram that only has on the side within it around the vibrating membrane of the soft wave pipe of pass through openings.

Figure 19 A-19B be have cylindrical sleeves around pass through openings, only within it on the side around the schematic diagram of the vibrating membrane of the annular magnet of sleeve and the ferromagnetic fluids between sleeve and drive rod.

Figure 20 A-20B only has cylindrical sleeves around pass through openings, is only having schematic diagram around the vibrating membrane of the annular magnet of pass through openings and the ferromagnetic fluids between magnet and drive rod within it on the side on its lateral surface.

Figure 21 A-21B is the schematic diagram of vibrating membrane with moving lubricant of semi-fluid of the pass through openings of covering.

Figure 22 A is the schematic diagram with vibrating membrane module case body of rib.

Figure 22 B is the perspective schematic view that comprises the sonic transducer of the module case body with rib.

Figure 23 A-23C is the schematic diagram with dome shape vibration film of the rib of one and sleeve.

Figure 24 A comprises the modularization housing section with rib and has the perspective schematic view of transducer dome shape vibration film, modular of soft foam sleeve.

Figure 24 B is the schematic cross section with dome shape vibration film and transducer soft foam sleeve, modular.

Embodiment

A. directly drive

Fig. 1 represents one embodiment of the present invention, and wherein electromagnetic machine comprises magnet 1010 and voice coil loudspeaker voice coil 1020, and the mechanical fastener 1030 that links to each other with drive rod 1040 is installed on the described voice coil loudspeaker voice coil 1020.Drive rod is connected on the vibrating membrane 1050, and each vibrating membrane 1050 is connected on the housing 1060 by corresponding suspension 1070 again.When audio signal acts on the voice coil loudspeaker voice coil, can be radiated acoustic surrounding by opening 1080 from the sound wave of vibrating membrane one side.Sound wave from the vibrating membrane opposite side can be by another group opening 1085 radiation.The escape of air that can prevent or reduce substantially not meet the requirements by dividing plate 1090 and seal 1100.If desired, can on motor, adopt one or more linings to prevent that voice coil loudspeaker voice coil from producing and do not wish the motion that occurs.Alternatively, drive rod 1040 can pass some or all vibrating membranes 1050 under the situation that does not adopt seal.The bulk that can optimize between vibrating membrane and the bar is reduced to minimum with the friction between bar and the vibrating membrane simultaneously escape of air is reduced to minimum.

Fig. 2 represents one embodiment of the present invention, and wherein electromagnetic machine comprises magnet 2010 and voice coil loudspeaker voice coil 2020, and the mechanical fastener 2030 that links to each other with drive rod 2040 is installed on the described voice coil loudspeaker voice coil 2020.Drive rod 2040 is connected on the vibrating membrane 2050, and each vibrating membrane 2050 is connected on the housing 2060 by corresponding suspension 2070 again.Suspension 2070 does not need all have identical attribute.For example adopting the bigger suspension of hardness being satisfactory along the mobile minimum of reducing on the direction outside the drive rod direction of actuation near the voice coil loudspeaker voice coil with voice coil loudspeaker voice coil.Can be by the geometry of conversion suspension or the hardness of control of material suspension 2070.In addition, by being orientated to them by the vibrating membrane suspension that single motor activates, can reduce the distorted characteristic of transducer in the face of opposite direction.In this embodiment, drive rod 2040 passes whole vibrating membranes 2150 except that one via seal 2180 sealed opening.Another motor comprises magnet 2110 and the voice coil loudspeaker voice coil 2120 with the mechanical fastener 2130 that links to each other with drive rod 2140.Drive rod 2140 is connected on the vibrating membrane 2150, and each vibrating membrane 2150 is connected on the housing 2060 by corresponding suspension 2170 again.In this embodiment, drive rod 2140 passes whole vibrating membranes 2050 except that one via seal 2180 sealed opening.Voice coil loudspeaker voice coil 2020 and 2120 is connected so that each vibrating membrane is relative with adjacent vibrating membrane and works.When audio signal acts on the transducer, can be radiated acoustic surrounding by opening 2090 from the sound wave in vibrating membrane front.Prevent or reduce the leakage between the ground roll of positive ground roll and back substantially by the seal on the vibrating membrane.Back ground roll can pass through opening 2190 radiation.Alternatively, drive rod 2040 and 2140 can pass some or all vibrating membranes 2050 and 2150 under the situation that does not adopt seal.Minimum is reduced to the friction between bar and the vibrating membrane simultaneously escape of air is reduced to minimum in the space that can optimize between vibrating membrane and the bar.After considering the component change that causes because of foozle, the net change of mechanical part momentum is zero or is substantially zero in this execution mode of the present invention, and therefore, transducer housing 2060 can not vibrate basically.

Fig. 3 represents one embodiment of the present invention, the voice coil loudspeaker voice coil 3020 on wherein electromagnetic machine comprises magnet 3010 and is installed in the mechanical connection that links to each other with two drive rods 3040 on 3030.Drive rod 3040 is connected on the vibrating membrane 3050, and vibrating membrane 3050 is connected on the housing 3060 by suspension 3070 again.When audio signal acts on the transducer, can be radiated acoustic surrounding by opening 3080 from the sound wave of vibrating membrane one side.Sound wave from another survey of vibrating membrane can pass through opening 3180 radiation.Prevent or reduce the escape of air that appearance does not meet the requirements between each chamber substantially by dividing plate 3090.

Fig. 4 represents one embodiment of the present invention, the voice coil loudspeaker voice coil 4020 on wherein electromagnetic machine comprises magnet 4010 and is installed in the mechanical fastener 4030 that links to each other with drive rod 4040.Drive rod 4040 is connected on the vibrating membrane 4050, and vibrating membrane 4050 is connected on the housing 4060 by suspension 4070 again.Another motor comprises magnet 4080 and the voice coil loudspeaker voice coil 4090 with the mechanical fastener 4100 that links to each other with drive rod 4110.Drive rod 4110 is connected on the vibrating membrane 4120, and vibrating membrane 4120 is connected on the housing 4060 by suspension 4130 again.Voice coil loudspeaker voice coil is connected so that each vibrating membrane is adjacent vibrating membrane and works relatively.After considering the component change that causes because of foozle, the net change of mechanical part momentum is zero or is substantially zero in this execution mode of the present invention, and therefore, transducer housing can not vibrate basically.

Main difference between Fig. 2 and the execution mode shown in Figure 4 is the structure that drives each bar of half vibrating membrane on the transducer.Another execution mode of the present invention adopts two groups of bars, and every group comprises a plurality of bars.Every group of bar links to each other with half vibrating membrane and passes second half vibrating membrane.For example, in Fig. 7-10 illustrated embodiment, adopt be symmetrically distributed around the vibrating membrane center conglobate six bars and 60 degree angles, adjacent stems space.Six bars are divided into two groups, every group of three bars, and the bar in these two groups is at interval staggered toward each other.This means that three bars in every group are with equidistantly be symmetrically distributed 120 degree angles, adjacent stems space in circular and this group, distance vibrating membrane center.Every group of three bar are connected on half vibrating membrane and to pass second half vibrating membrane with above-mentioned bar shown in Figure 2 2040 and 2140 similar modes via sealing or unencapsulated opening.In this layout, each vibrating membrane obtains activating with symmetric mode by three bars, and described three bars are connected three point symmetries distributions on the vibrating membrane and define unique two dimensional surface in three dimensions.If accurately being arranged in, bar and vibrating membrane make all bars be parallel to each other, all vibrating membranes are parallel to each other, and all bars are vertically to the surface of all vibrating membranes, the vibrating membrane normal force that will be symmetrically distributed then, this normal force be tending towards under the situation of the vibration mode that does not excite might cause not wishing the artificial sound product that occurs any not wish to occur required vertically on mobile vibrating membrane.

Another embodiment of the present invention adopts concentric a bar and a pipe.The external diameter of bar is less than the internal diameter of pipe, thereby when they were mounted with concentric manner, bar can contact tube.Bar is connected on the first group of vibrating membrane that comprises half vibrating membrane on the transducer and passes one or more vibrating membranes in the second group of vibrating membrane that comprises second half vibrating membrane.Pipe is connected on second group of vibrating membrane in the vibrating membrane and passes one or more vibrating membranes in first group of vibrating membrane.Bar passes vibrating membrane in second group of vibrating membrane because of it is completely contained in the pipe.Pipe is made up of interconnective a plurality of parts, and one or more bars pass first group of opening on the vibrating membrane.Preferably, three connecting rods are symmetrically distributed along the circumference of tube portion.

For the execution mode of any direct driving described herein, the vibrating membrane suspension does not need all have identical attribute or orientation.For example, adopting the bigger suspension of hardness will being satisfactory near the motor along the mobile minimum of reducing on the direction outside the drive rod direction of actuation.Can be by the geometry of conversion suspension or the hardness of control of material suspension.In addition, make some suspensions towards rightabout, can eliminate or reduce the asymmetric property of suspension with respect to other suspensions by being orientated to by the vibrating membrane suspension that single motor activates.In exemplary embodiment, suspension has asymmetrical response to the power that drive motors produces.Asymmetrical response generally includes to be introduced distortion in the final sound wave that is produced by the vibrating membrane that moves.Reverse by the orientation that makes some suspensions, can reduce the asymmetrical response of whole suspension, reduce the distortion in the final sound wave thus.

B. drive indirectly

Fig. 5 represents one embodiment of the present invention, and wherein electromagnetic machine comprises magnet 5010 and voice coil loudspeaker voice coil 5020, and the mechanical fastener 5030 that links to each other with housing 5040 is installed on the voice coil loudspeaker voice coil 5020.Housing links to each other with vibrating membrane 5050 by suspension 5060.Form each chamber by dividing plate 5070.Sound wave from the vibrating membrane front can be radiated acoustic surrounding by opening 5080.Sound wave from the vibrating membrane back can pass through opening 5180 radiation.Prevent or reduced counteracting between preceding vibrating membrane and the after vibration film substantially by dividing plate 5070.On the frequency that is in fully under vibrating membrane/suspended rack assembly resonance frequency, vibrating membrane substantially in phase moves and does not form basically any sound along with housing.On the frequency that is in fully on vibrating membrane/suspended rack assembly resonance frequency, the relative motion between vibrating membrane almost motionless and housing and the vibrating membrane forms sound.Thereby the resonance frequency of vibrating membrane/suspended rack assembly can be chosen to be and obtain required transducer frequency response.

Suspension does not need all have identical attribute or orientation.By changing the suspension orientation as mentioned above like that, can eliminate or reduce the asymmetric property of suspension, thereby can reduce the distorted characteristic of transducer.

C. modular

Fig. 6 A-6C, 7 and 8 expression another embodiment of the present invention, it makes sonic transducer can obtain the modularization assembling.This modularization execution mode is compared manufacturability, flexibility and the performance that can provide bigger with the non-modularization execution mode.

Fig. 6 A-6C represents a kind of execution mode of vibrating membrane module.Fig. 6 A represents the front view of vibrating membrane module, and Fig. 6 B represents the rearview of same vibrating membrane module, and Fig. 6 C represents the cross-sectional view of same vibrating membrane module.The vibrating membrane module comprises by suspension 6070 and is connected vibrating membrane 6050 on the housing section 6060.Housing section 6060 is included in the opening 6190 of front side and at another opening 6290 of rear side.Housing section 6060 has in the projection 6162 of front side with in the projection 6262 of rear side, and corresponding respectively at the groove 6164 of front side with at the groove 6264 of rear side.The vibrating membrane module also comprises three bars 6040, and each bar has at the projection 6041 of front side and the opening 6042 that is complementary at rear side.Bar 6040 can be integral to improve structural intergrity with vibrating membrane 6050.For example can in molding process, adopt such as the polypropylene-polyphenylene-oxide-styrene materials of filling glass or filling mica and make described vibrating membrane/rod unit.Vibrating membrane 6050 has three openings 6080, makes the bar of adjacent vibrating membrane module can pass vibrating membrane 6050.If desired, the vibrating membrane module can have the suspension of different attribute or different orientation as mentioned above.

When two adjacent vibrating membrane modules are assembled together when forming a kind of transducer of execution mode, the front side of first vibrating membrane links to each other with the front side of second vibrating membrane.The bar 6040 of first vibrating membrane passes the opening 6080 of second vibrating membrane.Each projection 6162 of two vibrating membrane modules slips in the groove 6164 of another module and can be by operational example as gummed or sonic welded combination.Open front 6190 combination of first and second vibrating membranes is delivered to opening in the surrounding air to form with the front sound wave.The assembly that comprises two assembled in this way vibrating membrane modules can fit together with the 3rd vibrating membrane module that rear side is connected the second vibrating membrane rear side.The projection 6262 of each slips in the groove 6264 of another module and can be by operational example as gummed or sonic welded combination in the second and the 3rd vibrating membrane module.The bar projection 6041 of first vibrating membrane slips in the bar opening 6042 of the 3rd vibrating membrane and can be by operational example as gummed or sonic welded combination.After-opening 6290 combination of the second and the 3rd vibrating membrane makes the back sound wave be discharged to opening in the surrounding air with formation.

In a preferred embodiment, the housing section 6060 of vibrating membrane module is made vibrating membrane is provided the material of stabilizing supporting structure by having sufficient intensity and rigidity, makes transducer not produce uncomfortable artifacts.But, if housing section by hard plastics for example filling glass or the polypropylene-polyphenylene-oxide-styrene materials of filling mica make, then the rigidity of resulting transducer is not enough greatly.Under the sort of situation, can be by on the housing section outer wall, increasing the rigidity that rib improves modular assembly.Figure 22 A represents that housing section 22060 has the flange 22160 and the rib 22260 of one on its outer surface.Adjacent housings portion can utilize adhesive and the screw that passes opening 22460 to interconnect to obtain extra rigidity.Resulting modular transducer assemblies 22000 has been shown in Figure 22 B.

In the packaging technology of above summary, can continue to increase extra vibrating membrane module to form the linear array of the vibrating membrane module of any Len req basically.Second kind of module is called motor module at this and comprises and be designed to the mechanical fastener that links to each other with the rear side of vibrating membrane module.

Linear array and one or more motor module of vibrating membrane module are assembled to form complete transducer.For example, Fig. 7 and 8 shows a kind of execution mode according to transducer of the present invention, and it is made up of two motor modules 7100 and 12 vibrating membrane modules.Each motor module 7100 comprises magnet assemblies 7110, coil 7120 and is connected motor on first vibrating membrane and is connected mechanical fastener 7130 on another vibrating membrane by bar 6040 therefrom.The quantity of the vibrating membrane module that can link together in this way is chosen to be the transducer of random length and any swept volume, supposes that motor has enough power so that the load that is produced by the vibrating membrane module of selecting quantity activates.

D. fluid drives

Fig. 9 and Figure 10 represent another execution mode of the present invention, and wherein motor module 9100 and the electric machinery that adopts on traditional transducers seemingly and comprise magnet assemblies 9110, coil 9120 and conical diaphragm 9130.Conical diaphragm 9130 is connected with first vibrating membrane, 9140 fluids by the fluid that is included in the annular seal space 9150.Vibrating membrane 9140 is by bar 6040 and all the other vibrating membrane 6050 mechanical connections.Can promote the positive ground roll of vibrating membrane 6050 from the back ground roll of direct driven conical diaphragm 9130.If the fluid that adopts in the annular seal space 9150 between direct driven conical diaphragm 9130 and indirect driven vibrating membrane 6050 is a for example air of gas, then fluid drives and comprises low pass filter.In this case, can drive direct driven conical diaphragm 9130 and in their whole frequency range, produce effective acoustic energy, drive indirect driven vibrating membrane 6050 simultaneously and only on low frequency, produce effective acoustic energy.

E. reduce the escape of air noise

Figure 11 A-11C, 12A-12C and Figure 13 A-13C represent that three kinds of different technology can be used in the multiple combination to reduce with the pass through openings by vibrating membrane and do not wish the escape of air noise that occurs.

Figure 11 A-11C represents to adopt a kind of technology of composite membrane vibration 11050.Figure 11 A represents to have the decomposition view of the composite membrane vibration 11050 of two branch vibrating membranes 11150,11250 and the sound-absorbing material layer between them 11350.Sound-absorbing material layer 11350 can adopt such as gummed or molded technology and be connected on branch vibrating membrane 11150 and 11250.Figure 11 B and Figure 11 C represent the rearview and the cross-sectional view of composite membrane vibration 11050.

Figure 12 A-12C represents to adopt and has the another kind of technology of vibrating membrane 12050 that runs through the sleeve of through hole around it.Figure 12 A, Figure 12 B and Figure 12 C represent to have rearview, the front view of vibrating membrane 12050 that runs through the sleeve of through hole around it respectively, and cross-sectional view.

Figure 13 A-13C represents to adopt and has the another kind of technology of composite membrane vibration 13050 that runs through the sleeve of through hole around it.Figure 13 A represents to have the decomposition view of the composite membrane vibration 13050 of the sound-absorbing material 13350 between two branch vibrating membranes 13150 and 13250 and two branch vibrating membranes 13150 and 13250.Sound-absorbing material layer 13350 can be by using for example bonding or molding process is connected to branch vibrating membrane 13150 and 13250.Two branch vibrating membranes 13150 and 13250 each have sleeve 13450 around they corresponding pass through openings.Sleeve is formed on each lateral surface that divides vibrating membrane, and this lateral surface is in the face of the side away from sound-absorbing material 13350.Figure 13 B represents the rearview of branch vibrating membrane 13050 and the cross-sectional view that Figure 13 C represents branch vibrating membrane 13050.

Figure 14 A-14B represents to adopt another technology that has around the vibrating membrane 14050 of the rigid sleeve of its pass through openings and soft fabric sleeve.Figure 14 A and Figure 14 B represent the end view and the cross-sectional view of resulting sub-component, and it comprises the vibrating membrane 14050 that has around the hard cylindrical sleeves 14450 of each pass through openings on vibrating membrane 14050 both sides.Soft fabric sleeve 14550 is connected the outside of rigid sleeve 14450 and extends beyond them, almost touches the bar 14040 of the pass through openings slip of passing vibrating membrane 14050.

Figure 15 A-15B represents to adopt another technology that has around the vibrating membrane 15050 of the rigid sleeve of its pass through openings and soft foam sleeve.Figure 15 A and Figure 15 B represent the end view and the cross-sectional view of resulting sub-component, and it comprises the vibrating membrane 15050 that has around the hard cylindrical sleeves 15450 of each pass through openings on vibrating membrane 15050 both sides.Soft foam sleeve 15650 is connected the outside of rigid sleeve 15450 and preferably extends beyond them, the crooked bar 15040 that also almost touches the pass through openings slip of passing vibrating membrane 15050.

Figure 16 A-16B represents to adopt another technology of the vibrating membrane 16050 of the rigid sleeve that has around its pass through openings, soft foam sleeve and soft fabric sleeve.Figure 16 A and Figure 16 B represent the end view and the cross-sectional view of resulting sub-component, and it comprises the vibrating membrane 16050 that has around the hard cylindrical sleeves 16450 of each pass through openings on vibrating membrane 16050 both sides.Soft foam sleeve 16650 is connected the outside of rigid sleeve 16450, and soft fabric sleeve 16550 is connected the outside of soft foam sleeve 16650 and extends beyond them, almost touches the bar 16040 of the pass through openings slip of passing vibrating membrane 16050.

Figure 17 A-17B represents to adopt another technology that has around the vibrating membrane 17050 of the rigid sleeve of its pass through openings and soft foam sleeve.Figure 17 A and Figure 17 B represent the end view and the cross-sectional view of resulting sub-component, and it comprises the vibrating membrane 17050 that has around the hard cylindrical sleeves 17450 of each pass through openings on vibrating membrane 17050 both sides.Soft foam sleeve 17650 only is connected the outside of rigid sleeve 17450 on the medial surface of vibrating membrane 17050, and their tight contact levers 17040 are with the resistance of further reduction to air flows.Sleeve 17450 has infundibulate to reduce the escape of air noise to a greater degree on vibrating membrane 17050 lateral surfaces.

Figure 18 A-18B represents to be used to adopt and has the technology that prevents escape of air around the vibrating membrane 18050 of the soft wave pipe of its pass through openings.Figure 18 A and Figure 18 B represent the end view and the cross-sectional view of resulting sub-component, and it comprises the vibrating membrane 18050 with the soft wave pipe 18750 on the side within it.One side ring of bellows 18750 is coupled around each pass through openings of vibrating membrane 18050.The opposite side of bellows 18750 links to each other with bar 18040.Soft wave pipe 18750 moves relative to each other along with vibrating membrane 18050 and bar 18040 and extends and shrink.

Figure 19 A-19B represents to be used to adopt the vibrating membrane 19050 with rigid sleeve, annular magnet and ferromagnetic fluids to prevent another technology of escape of air.Figure 19 A and 19B represent the end view and the cross-sectional view of resulting sub-component, and it comprises the vibrating membrane 19050 that has around the hard cylindrical sleeves 19450 of each pass through openings on vibrating membrane 19050 both sides.Annular magnet 19950 is connected the outside of rigid sleeve 19450 on the medial surface of vibrating membrane 19050, and their preferred in the vertical directions are polarized to raise the efficiency.Ferromagnetic fluids 19960 is arranged between sleeve 19450 and the bar 19040, and the magnetic force by annular magnet 19950 is maintained at the appropriate location when bar 19040 moves with respect to vibrating membrane 19050.

Figure 20 A-20B represents to be used to adopt the vibrating membrane 20050 with soft sleeve, annular magnet and ferromagnetic fluids to prevent another technology of escape of air.Figure 20 A and 20B represent the end view and the cross-sectional view of resulting sub-component, and it comprises the vibrating membrane 20050 that has around the hard cylindrical sleeves 20450 of the pass through openings on the vibrating membrane medial surface.Annular magnet 20950 is connected on the medial surface of vibrating membrane 20050 around vibrating membrane 20050, and their preferred in the vertical directions are polarized to raise the efficiency.Ferromagnetic fluids 20960 is arranged between annular magnet 20950 and the bar 20040, and the magnetic force by annular magnet 20950 is maintained at the appropriate location when bar 20040 moves with respect to vibrating membrane 20050.

Figure 21 A-21B represent to be used to adopt have the moving lubricant of semi-fluid for example the vibrating membrane 21050 of thixotropic gel prevent another technology of escape of air.Figure 21 A and Figure 21 B represent the end view and the cross-sectional view of resulting sub-component, and it comprises the vibrating membrane 21050 of the moving lubricant 21980 of semi-fluid with the pass through openings on the sealing vibrating membrane both sides.Lubricant 21980 makes bar 21040 can slip over opening but sealed open in other cases, thereby has eliminated the air flows that flows through opening substantially.

The thickness of vibrating membrane and the length of sleeve are adjusted to feasible the shortest 2mm of total length or the longest 25mm or longer that passes the air duct of pass through openings.Can be according to application need and required audio quality levels setting air passage length.Approximately the passage length of 15mm is preferred concerning many application.

Accompanying drawing represents to have the execution mode of the sonic transducer of plane or two-dimension vibration film.Not crucial on the shape theory of vibrating membrane.Can adopt other shapes for example taper or domeshape.

Figure 23 A-23C represents to have the bar 23040 of one and the dome shape vibration film 23050 of sleeve 23450.Figure 23 A, Figure 23 B and Figure 23 C represent front view, lateral side view and the cross-sectional view of vibrating membrane 23050.Because vibrating membrane is a domeshape, therefore can increases flat lasso and reduce parts and improve rigidity to hold escape of air.Adopt around the flat lasso (landing) 23455 of sleeve 23450 and connect the parts that are used to reduce the escape of air noise, soft foam sleeve 17650 for example shown in Figure 17 or annular magnet 19950 shown in Figure 19.Increasing around the flat lasso 23045 of bar 23040 makes vibrating membrane 23050 more stand for example injection molding method of volume autofrettage.Also increase gusset 23047 as the structure support that connects between bar 23040 and the lasso 23045.Flat lasso 23045 and 23455 is pushed to the front side of vibrating membrane 23050 to improve the gap between the adjacent vibrating membrane, has improved the maximum allowable offset of whole energy transducer like this.

The perspective view and the cross-sectional view of the transducer 24000 of Figure 24 A and the assembling of Figure 24 B representation module, have on its outer surface one flange 24160 and rib 24260, and dome shape vibration film 24050, this vibrating membrane their rear sides have by soft foam sleeve 24650 around the bar 24040 and the sleeve 24450 of one.

Claims (54)

1. sonic transducer comprises:

Housing;

The a plurality of vibrating membranes that are divided into one or more groups, wherein the vibrating membrane at least one vibrating membrane group interconnects by bar, at least some bars in the described bar pass the opening on the vibrating membrane, and the vibrating membrane with opening comprises that the prevention air passes described opening or makes air diffuser pass the parts of opening; And

One or more motors of response signal of telecommunication operation; Wherein the vibrating membrane in every group is driven by corresponding motor, and all vibrating membranes are connected to described corresponding motor in this group.

2. sonic transducer as claimed in claim 1 is characterized in that, described sonic transducer is made up of following:

Interconnective a plurality of vibrating membrane module, each vibrating membrane module comprise housing section and the one or more vibrating membranes that are connected on the described housing section; And

Be connected the one or more motor modules on one or more vibrating membrane modules, each motor module comprises one or more motors.

3. sonic transducer as claimed in claim 2 is characterized in that, each vibrating membrane module comprises the one or more bars on the one or more vibrating membranes that are connected it.

4. sonic transducer as claimed in claim 3, it is characterized in that the one or more bars in the first vibrating membrane module link to each other with vibrating membrane in the second vibrating membrane module and pass opening on the vibrating membrane that inserts the 3rd vibrating membrane module between the first and second vibrating membrane modules.

5. sonic transducer as claimed in claim 4, it is characterized in that, one or more bars in each vibrating membrane module apparent surface outstanding from a surface of vibrating membrane and this vibrating membrane has one or more fixtures, and described fixture is suitable for holding the end of one or more bars of the module that links to each other with described corresponding vibration film module with coupling.

6. sonic transducer as claimed in claim 4, it is characterized in that, first group of one or more bar are outstanding and second group of one or more bar is outstanding from the apparent surface of this corresponding vibration film from a surface of corresponding vibration film, and wherein the end of two groups of bars is suitable for mutual coupling.

7. sonic transducer as claimed in claim 1 is characterized in that, described parts comprise the seal that forms around described opening.

8. sonic transducer as claimed in claim 7 is characterized in that, described seal comprises:

One or more light foam, every light foam is compressible and expandable and is arranged in the respective openings place;

One or more bellowss that can extend and shrink, each bellows is arranged in the respective openings place;

Be arranged in the ferromagnetic fluids at respective openings place, described ferromagnetic fluids is maintained at the appropriate location by the one or more magnet that link to each other with the corresponding vibration film; Perhaps

Be arranged in the lubricant at respective openings place.

9. sonic transducer as claimed in claim 7 is characterized in that, described seal comprises:

One or more light foam, every light foam near the opening attached to bar on, foam block compresses when bar pushes it against opening and expands when bar pushes away opening with it;

One or more bellowss that can extend and shrink, each bellows near the opening attached to bar on, bellows compresses when bar pushes it against opening and extends when bar pushes away opening with it; Perhaps

At near the lubricant that is arranged in the opening on the bar.

10. sonic transducer as claimed in claim 1 is characterized in that, described parts comprise following vibrating membrane feature: three layer interlayer rings of material get around mouthful layout and the intermediate layer is a sound-absorbing material, for example viscoelastic polymer.

11. sonic transducer as claimed in claim 1 is characterized in that, described parts comprise following vibrating membrane feature: three layer interlayer rings of material get around a mouthful layout, and skin is that stretch-proof material and intermediate layer are low density materials, for example polyurethane foam.

12. sonic transducer as claimed in claim 1 is characterized in that, described parts comprise the sleeve around opening.

13. sonic transducer as claimed in claim 12 is characterized in that, described sleeve is the shape difference on each side of vibrating membrane.

14. sonic transducer as claimed in claim 13 is characterized in that, described cylindrical sleeves is shape such as funnel on a side of vibrating membrane.

15. sonic transducer as claimed in claim 12 is characterized in that, the internal diameter of described sleeve is enough little, makes liner ring distaff close fit.

16. sonic transducer as claimed in claim 15 is characterized in that, described sleeve comprises soft and smooth to reduce by first material that rubs with bar.

17. sonic transducer as claimed in claim 16 is characterized in that, described sleeve also is included in (inflexible) second material hard on the vibrating membrane, and first material is installed on second material.

18. sonic transducer as claimed in claim 12 is characterized in that, described sleeve has magnet and ferromagnetic fluids and is arranged in sleeve and passes between the bar of opening.

19. sonic transducer as claimed in claim 1 is characterized in that, described parts comprise the foam around aperture arrangement.

20. sonic transducer as claimed in claim 19 is characterized in that, described parts comprise around opening and are installed in sleeve on the vibrating membrane, and foam is installed on the sleeve.

21. sonic transducer as claimed in claim 20 is characterized in that, described parts comprise the soft fabric of installing on the foam.

22. sonic transducer as claimed in claim 19 is characterized in that, on the relative side of the side with transmitting the sound that the listener hears that described foam is installed in vibrating membrane.

23. sonic transducer as claimed in claim 19 is characterized in that, described foam is installed on the side of the sound that the transmission listener of vibrating membrane hears.

24. sonic transducer as claimed in claim 19 is characterized in that, described foam is installed on the both sides of vibrating membrane.

25. sonic transducer as claimed in claim 1 is characterized in that, described parts are included near the lining around the bar layout of opening.

26. sonic transducer as claimed in claim 25 is characterized in that, described parts comprise around aperture arrangement and are connected flexible material on the lining.

27. a sonic transducer comprises:

Housing;

The a plurality of vibrating membranes that are divided into one or more groups, wherein the vibrating membrane at least one vibrating membrane group interconnects by bar, and described bar extends in outside makes these bars not pass vibrating membrane, and

Operation of the response signal of telecommunication and the one or more motors that combine with housing;

Wherein the vibrating membrane in every group is driven by corresponding motor, and all vibrating membranes are connected on the described corresponding motor in this group, and at least one motor has the connector that is connected with the vibrating membrane direct mechanical of its driving.

28. sonic transducer as claimed in claim 27 is characterized in that, described sonic transducer is made up of following:

Interconnective a plurality of vibrating membrane module, each vibrating membrane module comprise housing section and the one or more vibrating membranes that are connected on the housing section; And

Be connected the one or more motor modules on one or more vibrating membrane modules, each motor module comprises one or more motors.

29. sonic transducer as claimed in claim 28, it is characterized in that, each vibrating membrane module comprises the one or more bars on the one or more vibrating membranes that are connected it, and the one or more bars in the first vibrating membrane module link to each other and extend with vibrating membrane in the second vibrating membrane module and make them can get around the 3rd vibrating membrane module that is inserted between the first and second vibrating membrane modules.

30. as claim 1,27 and 7-26 in any described sonic transducer, it is characterized in that, described sonic transducer comprises two groups of vibrating membranes and two motors, and each motor activates the vibrating membrane in the respective sets, and the vibrating membrane group reciprocally is driven.

31. as claim 1,27 and 7-26 in any described sonic transducer, it is characterized in that each of two or more vibrating membranes is suspended on the housing by suspension and the suspension of described two or more vibrating membranes has different attributes or orientation.

32. sonic transducer as claimed in claim 31, it is characterized in that, each of two or more vibrating membranes in one group is suspended on the housing by suspension and the vibrating membrane in this group has the suspension of different hardness, wherein be used near the suspension hardness of the vibrating membrane of motor higher, the vibrating membrane of described motor-driven in should group.

33. sonic transducer as claimed in claim 32, it is characterized in that, each of two or more vibrating membranes is suspended on the suspension that some vibrating membranes on the housing and in a group have first orientation by suspension, other vibrating membranes in this group have the suspension of second orientation, second orientation and first opposite orientation.

34. sonic transducer as claimed in claim 31, it is characterized in that, each of two or more vibrating membranes is suspended on the suspension that some vibrating membranes on the housing and in a group have first orientation by suspension, other vibrating membranes in this group have the suspension of second orientation, second orientation and first opposite orientation.

35. sonic transducer as claimed in claim 4 is characterized in that, described parts comprise the sleeve around opening.

36. as claim 12 or 35 described sonic transducers, it is characterized in that, the bar that at least one vibrating membrane in described a plurality of vibrating membrane has domeshape or conical surface and has one or more one, each bar by flat lasso around, recessed domeshape of wherein said flat lasso or conical surface below.

37. sonic transducer as claimed in claim 36 is characterized in that, described sonic transducer is included in one or more ribs or the one or more flange on the housing outer surface, and they extend through described a plurality of vibrating membrane along transducer length.

38. as claim 12 or 35 described sonic transducers, it is characterized in that, at least one vibrating membrane in described a plurality of vibrating membrane has domeshape or conical surface and has one or more sleeves, each sleeve by flat lasso around, recessed domeshape of wherein said flat lasso or conical surface below.

39. sonic transducer as claimed in claim 38 is characterized in that, described sonic transducer is included in one or more ribs or the one or more flange on the housing outer surface, and they extend through described a plurality of vibrating membrane along transducer length.

40. sonic transducer as claimed in claim 1 or 2 is characterized in that, described sonic transducer is included in the one or more ribs on the housing outer surface, and they extend through described a plurality of vibrating membrane along transducer length.

41. sonic transducer as claimed in claim 1 or 2 is characterized in that, described sonic transducer is included in the one or more flanges on the housing outer surface, and they extend through described a plurality of vibrating membrane along transducer length.

42. sonic transducer as claimed in claim 1 or 2 is characterized in that, described sonic transducer is included in one or more ribs and the one or more flange on the housing outer surface, and they extend through described a plurality of vibrating membrane along transducer length.

43. a sonic transducer comprises:

Housing;

Be suspended on the housing and be divided into one or more groups a plurality of vibrating membranes, and

Operation of the response signal of telecommunication and the one or more motors that combine with housing;

Wherein the vibrating membrane in every group is driven by corresponding motor, and all vibrating membranes are connected to described corresponding motor in this group, and at least one motor has the indirect connector with the indirect mechanical connection of vibrating membrane of its driving.

44. sonic transducer as claimed in claim 43 is characterized in that, described indirect connector comprises the corresponding motor that links to each other with housing.

45. sonic transducer as claimed in claim 43 is characterized in that, described indirect connector is gaseous state or the fluid liquid that motor is linked to each other with vibrating membrane.

46. sonic transducer as claimed in claim 45 is characterized in that, corresponding motor links to each other with first vibrating membrane and fluid links to each other first vibrating membrane in the vibrating membrane group with second vibrating membrane.

47. sonic transducer as claimed in claim 46 is characterized in that, described fluid is included in the annular seal space between first vibrating membrane and second vibrating membrane.

48. sonic transducer as claimed in claim 43 is characterized in that, described sonic transducer is made up of following:

Interconnective a plurality of vibrating membrane module, each vibrating membrane module comprise housing section and the one or more vibrating membranes that are connected on the housing section; And

Be connected the one or more motor modules on one or more vibrating membrane modules, each motor module comprises one or more motors.

49. sonic transducer as claimed in claim 48 is characterized in that, each vibrating membrane module comprises the one or more bars on the one or more vibrating membranes that are connected it.

50. sonic transducer as claimed in claim 49 is characterized in that, at least some bars pass the opening on the vibrating membrane.

51. sonic transducer as claimed in claim 49, it is characterized in that the one or more bars in the first vibrating membrane module link to each other with vibrating membrane in the second vibrating membrane module and extend and make them get around the 3rd vibrating membrane module of inserting between the first and second vibrating membrane modules.

52., it is characterized in that described sonic transducer comprises two groups of vibrating membranes and two motors as any described sonic transducer among the claim 43-47, each motor activates the vibrating membrane in the respective sets, and the vibrating membrane group reciprocally is driven.

53., it is characterized in that each of two or more vibrating membranes is suspended on the housing by suspension and the suspension of described two or more vibrating membranes has different attributes or orientation as any described sonic transducer among the claim 43-47.

54. sonic transducer as claimed in claim 53, it is characterized in that, each of two or more vibrating membranes is suspended on the suspension that some vibrating membranes on the housing and in a group have first orientation by suspension, other vibrating membranes in this group have the suspension of second orientation, second orientation and first opposite orientation.

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