CN105007551A - Method for improving sound quality of bone conduction earphone and bone conduction earphone - Google Patents
Method for improving sound quality of bone conduction earphone and bone conduction earphone Download PDFInfo
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- CN105007551A CN105007551A CN201510496617.1A CN201510496617A CN105007551A CN 105007551 A CN105007551 A CN 105007551A CN 201510496617 A CN201510496617 A CN 201510496617A CN 105007551 A CN105007551 A CN 105007551A
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2400/00—Loudspeakers
- H04R2400/11—Aspects regarding the frame of loudspeaker transducers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2460/00—Details of hearing devices, i.e. of ear- or headphones covered by H04R1/10 or H04R5/033 but not provided for in any of their subgroups, or of hearing aids covered by H04R25/00 but not provided for in any of its subgroups
- H04R2460/13—Hearing devices using bone conduction transducers
Abstract
The invention discloses a method for improving the sound quality of a bone conduction earphone and a bone conduction earphone capable of improving the sound quality. The bone conduction earphone comprises a vibration unit and an earphone frame/earphone hanging belt connected with the vibration unit, wherein the vibration unit at least comprises a contact surface which is contacted with a user directly or indirectly, and pressure between the contact surface of the vibration unit and the user is greater than a third threshold, and the pressure enables the contact surface of the vibration unit to maintain a minimum force in contact with the user; and pressure between the contact surface of the vibration unit and the user is enabled to be less than a fourth threshold, and the pressure is a minimum force by which the contact surface of the vibration unit enables the user to generate a sense of pain. According to the invention, the sound quality, particularly the mid-bass sound quality, of the bone conduction earphone is improved through a specific design, and the wearing comfort of the bone conduction earphone is improved.
Description
Technical field
The present invention relates to a kind of high performance bone conduction earphone and improved the tonequality of bone conduction earphone by particular design, low sound quality especially, reduce and leak sound phenomenon, and increase the method for bone conduction earphone comfortable wearing degree.
Background technology
Generally, people can acoustic be because air by external ear duct vibration passing to ear-drum, the auditory nerve of the vibratory drive people formed by ear-drum, the thus vibration of perceives sound.Bone-conduction speaker operationally, usually can be delivered to the auditory nerve of people, thus make people hear sound by the skin of people, hypodermis and bone.
Summary of the invention
The present invention relates to a kind of high performance bone conduction earphone and improved the method for bone conduction earphone tonequality by particular design.Ear frame/the earphone of described bone conduction earphone involving vibrations unit, connection vibration unit is linked with; Described vibration unit at least comprises a contact-making surface, described contact-making surface directly or indirectly contacts with user at least partly, pressure between the contact-making surface of described vibration unit and user is greater than first threshold, pressure between the contact-making surface of described vibration unit and user is less than Second Threshold, and the pressure between the contact-making surface of described vibration unit and user is greater than the 3rd threshold value; Pressure between the contact-making surface of described vibration unit and user is less than the 4th threshold value; Optionally, described first threshold is greater than described 3rd threshold value, and described first threshold can improve the transmission efficiency of high-frequency signal, improves the tonequality of high-frequency signal; Optionally, described 3rd threshold value is the minimum force that vibration unit contact-making surface is contacted with user; Optionally, described 4th threshold value is that vibration unit contact-making surface makes user produce the minimum force of the pain sensation; Optionally, described Second Threshold is less than described 4th threshold value, and described Second Threshold can improve the transmission efficiency of low frequency signal, improves the tonequality of low frequency signal; Optionally, described first threshold is 0.2N; Described Second Threshold is 1.5N; Pressure corresponding to described 3rd threshold value is 0.1N: pressure corresponding to described 4th threshold value is 5N; The tonequality of bone conduction earphone is relevant with the distribution of force on the contact-making surface of described vibration unit, and the frequency response curve of osteoacusis system is the superposition of the frequency response curve of each point on described contact-making surface.In a particular embodiment, the pressure between described contact-making surface and user is 0.1N-5N, and preferably, pressure is 0.2N-4N, and more preferably, pressure is 0.2N-3N, and further preferably, pressure is 0.2N-1.5N, and still more preferably, pressure is 0.3N-1.5N.
In one embodiment, the present invention relates to a kind of bone-conduction speaker improving leakage sound, this loud speaker involving vibrations unit.This vibration unit at least comprises a contact-making surface, and described contact-making surface directly contacts or indirect contact with user at least partly; Described contact-making surface at least comprises the first contact-making surface region and the second contact-making surface region;
Optionally, this first contact-making surface region comprises draws acoustic aperture, and this draws acoustic aperture derives the sound wave in vibration unit shell, superposes, suppress to leak sound with leakage speech ripple; Optionally, the side of vibration unit shell is provided with at least one side and draws acoustic aperture, this draws acoustic aperture derives the sound wave in the shell of vibration unit, superposes, suppress to leak sound with leakage speech ripple; Optionally, be air below described first contact-making surface region, below described second contact-making surface region, connect vibration panel, or vibration panel is the second contact-making surface region; Optionally, described second contact-making surface area raised portion divides higher than the first contact-making surface region, and described first contact-making surface region has at least part not contact with user, the described part do not contacted with user has and draws acoustic aperture.Described second contact-making surface region and user fit tightr, and contact force is larger; Optionally, described vibration panel is identical with shape with the area in described second contact-making surface region; Optionally, described vibration panel is different with shape from the area in described second contact-making surface region, and described vibration panel is not more than described second contact-making surface region area in the projected area in described second contact-making surface region.
In another embodiment, the invention provides a kind of bone-conduction speaker improving tonequality, comprise a shell, a transducing head, one first vibration-transmitting plate; Described first vibration-transmitting plate is connected by physics mode with between described transducing head; Described first vibration-transmitting plate is connected by physics mode with between described shell; Described transducing head can produce at least one resonance peak;
Optionally, described transducing head comprises at least one oscillating plate and one second vibration-transmitting plate, and this transducing head can produce at least two resonance peaks; Optionally, described transducing head comprises at least one voice coil loudspeaker voice coil and at least one magnetic circuit system; Described voice coil loudspeaker voice coil and described oscillating plate physical connection, described magnetic circuit system and described second vibration-transmitting plate physical connection; Optionally, the stiffness factor of described oscillating plate is greater than the stiffness factor of described second vibration-transmitting plate; Optionally, described first vibration-transmitting plate and the second vibration-transmitting plate are flexure strip; Optionally, described first vibration-transmitting plate to center converge like the spokes of a wheel at the hub at least two the first poles; Preferably, described first vibration-transmitting plate thickness is 0.005mm-3mm, and more preferably, thickness is 0.01mm-2mm, more preferably, thickness is 0.01mm-1mm, and further preferably, thickness is 0.02mm-0.5mm.
In another embodiment, the invention provides a kind of bone-conduction speaker improving tonequality, comprise vibration unit, described vibration unit at least comprises a contact layer, and this contact layer directly or indirectly contacts with user at least partly; Described contact-making surface has gradient-structure, makes pressure distribution on contact layer uneven;
Optionally, the gradient-structure of described contact layer makes the pressure distribution that contacts with user uneven, causes each contact point to have different frequency response curves; The frequency response curve of described contact layer entirety is formed by stacking by the frequency response curve of each point; Optionally, described contact layer arranges gradient-structure towards the one side of user; Optionally, described gradient-structure comprises at least one projection; Optionally, described gradient-structure comprises at least one groove; Optionally, described gradient-structure is positioned at center towards the one side of user or edge.Optionally, the one side of described contact layer user dorsad arranges gradient-structure; Optionally, described gradient-structure comprises at least one projection; Optionally, described gradient-structure comprises at least one groove; Optionally, described gradient-structure is positioned at center or the edge of the one side of user dorsad.
Accompanying drawing explanation
Fig. 1 is that bone-conduction speaker causes people's ear to produce the process of the sense of hearing.
The outline drawing of the vibration generating portion of a kind of bone-conduction speaker that Fig. 2-A provides for the embodiment of the present invention.
The structure chart of the vibration generating portion of a kind of bone-conduction speaker that Fig. 2-B provides for the embodiment of the present invention.
The structure chart of the vibration generating portion of a kind of bone-conduction speaker that Fig. 2-C provides for the embodiment of the present invention.
Fig. 3-A is the equivalent model of vibration of a kind of bone-conduction speaker vibration generating portion in the embodiment of the present invention.
The vibration response curve of a kind of bone-conduction speaker that Fig. 3-B is suitable for by the embodiment of the present invention.
Fig. 4 be in the embodiment of the present invention a kind of bone-conduction speaker by the schematic diagram of acoustical vibration transmission system.
Fig. 5-A and 5-B is respectively vertical view and the end view of a kind of bone-conduction speaker panel bonding mode in the embodiment of the present invention.
Fig. 6 is the structure chart of the vibration generating portion of a kind of bone-conduction speaker in the embodiment of the present invention.
The vibration response curve of a kind of bone-conduction speaker work that Fig. 7 is suitable for by the embodiment of the present invention.
The vibration response curve of a kind of bone-conduction speaker work that Fig. 8 is suitable for by the embodiment of the present invention.
Fig. 9 is the structure chart of the vibration generating portion of a kind of bone-conduction speaker in the embodiment of the present invention.
Figure 10 is the frequency response curve of a kind of bone-conduction speaker in the embodiment of the present invention.
Figure 11 is the equivalent model of a kind of bone-conduction speaker vibration generation and transmission system in the embodiment of the present invention.
The structure chart of a kind of bone-conduction speaker that Figure 12 provides for the embodiment of the present invention.
The vibration response curve of a kind of bone-conduction speaker that Figure 13-A and Figure 13-B is suitable for by the embodiment of the present invention.
A kind of method of measuring bone-conduction speaker clamping force of Figure 14-A and Figure 14-B for providing in the embodiment of the present invention.
A kind of bone-conduction speaker vibration response curve that Figure 14-C is suitable for by the embodiment of the present invention.
Figure 15 is a kind of mode regulating clamping force in the embodiment of the present invention.
Figure 16-A is the schematic diagram of a kind of bone-conduction speaker vibration unit contact-making surface in the embodiment of the present invention.
The vibration response curve of a kind of bone-conduction speaker that Figure 16-B is suitable for by the embodiment of the present invention.
Figure 17 is the schematic diagram of bone-conduction speaker vibration unit contact-making surface in the embodiment of the present invention.
The structure chart of a kind of bone-conduction speaker that Figure 18-A and Figure 18-B provides for the embodiment of the present invention and compound vibrating device thereof.
The frequency response curve of a kind of bone-conduction speaker that Figure 19 is suitable for by the embodiment of the present invention.
The structure chart of a kind of bone-conduction speaker that Figure 20 provides for the embodiment of the present invention and compound vibrating device thereof.
Figure 21-A is the equivalent model figure of a kind of bone-conduction speaker vibration generating portion in the embodiment of the present invention.
Figure 21-B in a specific embodiment a kind of vibration response curve of bone-conduction speaker that is suitable for.
Figure 21-C in a specific embodiment a kind of vibration response curve of bone-conduction speaker that is suitable for.
Figure 22-A is the structure chart of the vibration generating portion of a kind of bone-conduction speaker in a specific embodiment.
Figure 22-B is the vibration response curve of bone-conduction speaker vibration generating portion in a specific embodiment.
Figure 22-C is the leakage sound curve of bone-conduction speaker in a specific embodiment.
Figure 23 is the structure chart of bone-conduction speaker vibration generating portion in a specific embodiment.
Figure 24-A is the application scenarios of bone-conduction speaker in a specific embodiment.
Figure 24-B is the vibration response curve of bone-conduction speaker vibration generating portion in a specific embodiment.
Figure 25 is the structure chart of bone-conduction speaker vibration generating portion in a specific embodiment.
Figure 26 is the structural representation of bone-conduction speaker panel in a specific embodiment.
Figure 27 is the gradient-structure in specific embodiment outside bone-conduction speaker contact-making surface.
Figure 28-A and Figure 28-B is the vibration response curve in specific embodiment.
Figure 29 is the gradient-structure in specific embodiment inside bone-conduction speaker contact-making surface.
Figure 30 is the structure chart of bone-conduction speaker vibration generating portion in a specific embodiment.
Embodiment
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, do not limit range of application of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other similar scenes can be applied the present invention to according to these accompanying drawings.
As shown in the specification and claims, unless context clearly points out exceptional situation, the word such as " ", " ", " one " and/or " being somebody's turn to do " not refers in particular to odd number, also can comprise plural number.In general, term " comprises " only points out with " comprising " step and element that comprise and clearly identifying, and these steps and element do not form one and exclusively to enumerate, and method or equipment also may comprise other step or element.Term "based" is " at least in part based on ".Term " embodiment " expression " at least one embodiment "; Term " another embodiment " expression " at least one other embodiment ".The related definition of other terms provides in will be described below.
Below, without loss of generality, in describing the present invention during osteoacusis correlation technique, the description of " bone-conduction speaker " or " bone conduction earphone " will be adopted.This description is only a kind of form of osteoacusis application, and for the those of ordinary skill in this field, " loud speaker " or " earphone " also can replace with other similar words, such as " player ", " hearing aids " etc.In fact, the various implementations in the present invention can be applied on the hearing device of other non-loud speaker class easily.Such as, for those skilled in the art, after the general principle understanding bone-conduction speaker, may when not deviating from this principle, various correction in form and details and change is carried out to implementing the concrete mode of bone-conduction speaker and step, especially, in bone-conduction speaker, add ambient sound pickup and processing capacity, make this loud speaker realize the function of hearing aids.Such as, the microphones such as microphone can pick up the sound of user/wearer's surrounding environment, under certain algorithm, (or the signal of telecommunication produced) after acoustic processing are sent to bone-conduction speaker part.Namely bone-conduction speaker through certain amendment, can add the function of picking up surrounding sounds, and after certain signal transacting, passes through bone-conduction speaker part by transmission sound to user/wearer, thus realizes the function of ossiphone.As an example, algorithm mentioned here can comprise noise elimination, automatic growth control, acoustic feedback suppression, wide dynamic range compression, initiatively Context awareness, active anti-noise, directional process, tinnitus process, one or more combination of multi-channel wide dynamic range compression, initiatively chauvent's criterion, volume control etc.
Sound is passed to hearing system by bone by bone-conduction speaker, thus produces the sense of hearing.Fig. 1 is the process that bone-conduction speaker produces the sense of hearing, mainly comprises following step: in step 101, and bone-conduction speaker obtains or produces the signal containing acoustic information; In step 102, bone-conduction speaker produces vibration according to signal; In step 103, by transmission system by vibration passing to sensing terminal 104.In a kind of operative scenario, bone-conduction speaker pickup or produce containing the signal of acoustic information, converts acoustic information to acoustical vibration by transducing head, and by transmission system by transmission sound to sense organ, finally hear sound.Without loss of generality, the main body of hearing system described above, perceptron official rank can be people, also can be the animal with hearing system.It should be noted that and use the description of bone-conduction speaker not form restriction to bone-conduction speaker use scenes for the mankind below, similar description goes for other animal equally.
Be only concrete example to the description of bone-conduction speaker roughly flow process above, should not be considered to be the embodiment of unique feasible.Obviously, for those skilled in the art, after the general principle understanding bone-conduction speaker, may when not deviating from this principle, carry out various correction in form and details and change to implementing the concrete mode of bone-conduction speaker and step, but these are revised and change still within scope described above.Such as, contain between the signal of acoustic information and step 102 vibration generation in step 101 acquisition, additionally can add signal correction or strengthening step, the signal of acquisition in 101 can carry out strengthening or revising according to specific algorithm or parameter by this step.Further, vibrate in step 102 and produce between 103 vibration passing steps, additionally can add vibrating enhanced or revise step.This step can utilize the voice signal of 101 or environmentally parameter the vibration that 102 produce is strengthened or revises.In like manner; this vibrating enhanced or revise step can complete between step 103 and 104; such as noise reduction, acoustic feedback suppression, wide dynamic range compression, automatic growth control, initiatively Context awareness, active anti-noise, directional process, tinnitus process, multi-channel wide dynamic range compression, initiatively chauvent's criterion, volume control are carried out to signal; or other is similar; or more the process of combination in any, these are revised and change still within claims of the present invention.Method described herein and step in appropriate circumstances with any suitable order, or can realize simultaneously.In addition, when not departing from the spirit and scope of theme described herein, each independent step can be deleted from any one method.The each side of any example as described above can combine with each side of any example in other described examples, to form further example, and can not lose the effect of seeking.
Concrete, in a step 101, bone-conduction speaker can obtain according to different modes or produce the signal containing acoustic information.Acoustic information can refer to video, the audio file with format, also can refer to carry the final data or the file that are converted into sound by particular approach in general sense.Signal containing acoustic information can come from the memory cell of bone-conduction speaker itself, and the information that also can come from beyond bone-conduction speaker produces, stores or transmission system.This place discuss voice signal be not limited to the signal of telecommunication, also can comprise other form outside the signal of telecommunication as light signal, magnetic signal, mechanical signal etc.In principle, in order to vibrative acoustic information, all can be used as voice signal and process as long as this signal includes loud speaker.Voice signal is also not limited to a signal source, can come from multiple signal source.These multiple signal sources can be correlated with and also can be independent of each other.The mode of voice signal transmission or generation can be wired also can be wireless, can be real-time also can be time delay.Such as, bone-conduction speaker can receive the signal of telecommunication containing acoustic information by wired or wireless mode, also directly can obtain data from storage medium, produces voice signal; The assembly with sound collection function can be added in ossiphone, by the sound in pickup environment, convert the mechanical oscillation of sound to the signal of telecommunication, by obtaining the signal of telecommunication meeting particular requirement after amplifier process.Wherein, wired connection includes but not limited to the compound cable using metallic cable, optical cable or metal and optics, such as: coaxial cable, telecommunication cable, flexible cable, spiral cable, nonmetallic sheathed cable, sheath wire, multicore cable, twisted-pair cable, flat cable, shielded type cable, communication cable, paired cable, twin-lead cable and twisted-pair feeder.
Example described above is only used as convenience of description, and the medium of wired connection can also be other type, such as, and the transport vehicle of other signal of telecommunication or light signal etc.Wireless connections include but not limited to radio communication, free space optical communication, acoustic communication and electromagnetic induction etc.Wherein radio communication includes but not limited to, IEEE802.11 series standard, IEEE802.15 series standard (such as Bluetooth technology and purple-bee technology etc.), first generation mobile communication technology, Generation Mobile Telecommunication System technology (such as FDMA, TDMA, SDMA, CDMA, with SSMA etc.), general packet radio service technology, G mobile communication (such as CDMA2000, WCDMA, TD-SCDMA, with WiMAX etc.), forth generation mobile communication technology (such as TD-LTE and FDD-LTE etc.), satellite communication (such as GPS technology etc.), near-field communication (NFC) and other operate in the technology of ISM band (such as 2.4GHz etc.), free space optical communication includes but not limited to visible ray, infra-red signal etc., acoustic communication includes but not limited to sound wave, ultrasonic wave signal etc., electromagnetic induction includes but not limited near field communication technology etc.Example described above is only used as convenience of description, and the medium of wireless connections can also be other type, such as, and the civil radio frequency range of Z-wave technology, other charge and military radio frequency range etc.Such as, as the application scenes of this technology, bone-conduction speaker can obtain by Bluetooth technology the signal containing acoustic information from other equipment, also directly from the memory cell that bone-conduction speaker carries, directly can obtain data, then produce voice signal.
Memory device/memory cell mentioned here, comprise Direct Attached Storage (Direct Attached Storage), the memory device in the storage systems such as network attached storage (Network Attached Storage) and storage area network (Storage Area Network).Memory device includes but not limited to that common all kinds of memory devices are as solid storage device (solid state hard disc, solid-state hybrid hard disk etc.), mechanical hard disk, USB flash memory, memory stick, storage card (as CF, SD etc.), other drivings (as CD, DVD, HD DVD, Blu-ray etc.), random asccess memory (RAM) and read-only memory (ROM).Wherein RAM has but is not limited to: dekatron, selectron, delay line storage, WILLIAMS-DARLING Ton pipe, dynamic random access memory (DRAM), static random access memory (SRAM), thyristor random asccess memory (T-RAM) and zero capacitance random asccess memory (Z-RAM) etc., ROM has again but is not limited to: magnetic bubble memory, A.O. linear memory, thin-film memory, magnetic plated wire memeory, magnetic core internal memory, magnetic drum memory, CD drive, hard disk, tape, early stage NVRAM (nonvolatile storage), phase-change memory element, the random memory-type internal memory of reluctance type, ferroelectric random stored memory, non-volatile SRAM, flash memory, the electronics formula of erasing can make carbon copies read-only memory, Erasable Programmable Read Only Memory EPROM, programmable read only memory, Mask ROM, floating connection door random access memory, nanometer random asccess memory, racing track internal memory, variable resistance type internal memory, with programmable metallization unit etc.Above-mentioned memory device/memory cell lists some examples, and the operable memory device of this memory device/memory cell is not limited thereto.
In 102, the signal containing acoustic information can convert to and vibrates and produce sound by bone-conduction speaker.The generation vibrated is along with the conversion of energy, and bone-conduction speaker can use specific transducing head to realize signal and change to mechanical oscillation.Coexisting and changing of number of different types energy may be comprised in the process of conversion.Such as, the signal of telecommunication can be directly changed into mechanical oscillation by transducing head, produces sound.Again such as, acoustic information is included in light signal, and a kind of specific transducing head can realize the process being converted to vibration signal by light signal.Other kind of energy that can coexist in the transducing head course of work and change comprises heat energy, magnetic field energy etc.The power conversion mode of transducing head includes but not limited to moving-coil type, electrostatic, piezoelectric type, moving-iron type, pneumatic type, electromagnetic type etc.The frequency response range of bone-conduction speaker and tonequality can be subject to the impact of each physical assemblies performance in different transducing mode and transducing head.Such as, in moving-coil type transducing head, the cylindrical coil be wound around is connected with oscillating plate, coil by signal current drives drives vibration plate vibrates sounding in magnetic field, the distortion of the stretching, extension of oscillating plate material and contraction, fold, size, shape and fixed form, the magnetic density etc. of permanent magnet, all can bring very large impact to the audio quality that bone-conduction speaker is final.Again such as, oscillating plate can be the structure of Mirror Symmetry, centrosymmetric structure or asymmetrical structure; Oscillating plate can be provided with the cavernous structure of interruption, make oscillating plate produce larger displacement, thus allow bone-conduction speaker realize higher sensitivity, improve the power output of vibration and sound; Again such as, oscillating plate is torus structure, arranges the multiple poles converge like the spokes of a wheel at the hub to center in torus, and the number of pole can be two or more.
Obviously, for those skilled in the art, after understanding transducing mode and concrete device can affect the general principle of bone-conduction speaker audio quality, may when not deviating from this principle, suitable choice, combination, correction or change are carried out to the above-mentioned influencing factor mentioned, thus obtains desirable tonequality.Such as, adopt the permanent magnet of high-magnetic-density, more preferably oscillating plate material and design, can obtain better tonequality.
Term used herein " tonequality " can be understood as the quality that can reflect sound, refers to the fidelity of audio frequency after the processes such as treated, transmission.Tonequality describes primarily of loudness, tone and tone color three elements.Loudness is the subjective feeling of people's ear to sound intensity, and it is proportional to the logarithm value of intensity of sound, and intensity of sound sounds more greatly feels louder.And it is relevant with waveform with the frequency of sound.Tone, also known as pitch, refers to the subjective feeling of people's ear to acoustical vibration frequency height.Tone depends primarily on the fundamental frequency of sound, and fundamental frequency is higher, and tone is higher, and it is also relevant with the intensity of sound simultaneously.Tone color refers to the subjective sensation of people's ear to sound characteristics.Tone color depends primarily on the spectrum structure of sound, also relevant with the loudness of sound, duration, the factor such as process of establishing and decay process.The spectrum structure fundamental frequency of sound, tone number, harmonics distribution situation, amplitude size and phase relation describe.Different spectrum structures, just has different tone colors.Even if fundamental frequency is identical with loudness, if harmonic structure is different, tone color is not identical yet.
The implementation method of bone-conduction speaker vibration is a lot, and Fig. 2-A and Fig. 2-B is the structure chart of bone-conduction speaker vibration generating portion in a specific embodiment, comprises shell 210, panel 220, transducing head 230 and connector 240.
The vibration of panel 220 is delivered to auditory nerve by tissue and bone, thus makes people hear sound.Panel 220 can directly contact with human body skin, also can by the vibration passing layer (hereinafter can describe in detail) that is made up of certain material and skin contact.Certain material mentioned here can be selected from low-density material, such as plastics (such as but not limited to high-molecular polythene, blow-molding nylon, engineering plastics etc.), rubber also can be other single or composite materials that can reach same performance.For the kind of rubber, such as but not limited to general purpose rubber and Special type rubber.General purpose rubber is including but not limited to natural rubber, isoprene rubber, butadiene-styrene rubber, butadiene rubber, neoprene etc.Special type rubber is again including but not limited to acrylonitrile-butadiene rubber, silicon rubber, fluorubber, polysulfide rubber, polyurethane rubber, chlorohydrin rubber, acrylate rubber, epoxy propane rubber etc.Wherein, butadiene-styrene rubber comprises and is not limited to SBR of emulsion polymerization and solution polymerization styrene-butadiene rubber.For composite material, such as but not limited to reinforcing materials such as glass fibre, carbon fiber, boron fibre, graphite fibre, fiber, graphene fiber, silicon carbide fibre or aramid fibers.Also can be other compound that is organic and/or inorganic material, the such as all kinds of fiberglass of glass fiber reinforcement unsaturated polyester, epoxy resin or phenolic resin as matrix resin composition.Other materials that can be used for making vibration passing layer also comprise one or more the combination in silica gel, polyurethane (PolyUrethane), Merlon (Poly Carbonate).Transducing head 230 realizes based on certain principle the assembly that the signal of telecommunication changes to mechanical oscillation.Panel 220 is connected with transducing head 230, vibrates under the drive of transducing head 230.Connector 240 connects panel 220 and shell 210, for being positioned in shell by transducing head 230.Transducing head 230 by vibration passing to panel 220 time, vibration can pass to shell by connector 240 simultaneously, causes shell 210 to vibrate, also can the mode of vibration of corresponding change panel 220, thus affects the vibration that panel 220 passes to human body skin.
It should be noted that, the mode that transducing head and panel are fixed in shell is not limited to the connected mode that Fig. 2-B describes, obviously, for a person skilled in the art, whether adopt connector 240, or the connector 240 adopting different materials to make, adjustment transducing head 230 or panel 220 are connected to the mode etc. of shell 210, capital shows different mechanical impedance characteristics, produce different vibration passing effects, thus affect the vibration efficiency of vibrational system entirety, produce different tonequality.
Such as, if do not adopt connector, panel directly can be pasted onto on shell by glue, and the mode of clamping or welding also can be adopted to be connected on shell.According to connector, the connector then with appropriate elastic force has the effect of damping in the process of transmitting vibrations, the vibrational energy being delivered to shell can be reduced, thus the bone-conduction speaker effectively suppressing case vibration to cause outwardly leaks sound, also can help to avoid possible exception to resonate the generation of the abnormal sound caused, reach the effect improving tonequality.The transmission efficiency of connector on vibration being positioned at shell/upper diverse location also can produce impact in various degree, and preferably, connector can make transducing head be in the different state such as suspention or support.
Fig. 2-B is depicted as a kind of example of connected mode, and connector 240 can be connected with shell 210 top.Fig. 2-C is the example of another kind of connected mode, and panel 220 stretches out from the opening of shell 210, is connected between panel 220 and transducing head 230 by coupling part 250, and is connected by connector 240 with shell 210.
In other embodiment, also with other connected mode, transducing head can be fixed on enclosure interior, such as, can transducing head be fixed on shell inner bottom surface by connector, or (side that transducing head is connected with panel is top by the bottom of transducing head, side is in contrast bottom) be fixed on enclosure interior by spring is unsettled, also can the top of transducing head be connected on shell, or be connected by multiple connector being positioned at diverse location between transducing head with shell, or the combination in any of above multiple connected mode.
In some specific embodiments, connector has certain elasticity.The elasticity of connector is determined by the many-side such as material, thickness, structure of connector.For the material of connector, such as but not limited to, steel (such as but not limited to stainless steel, carbon steel etc.), alloy in lightweight (such as but not limited to aluminium alloy, beryllium copper, magnesium alloy, titanium alloy etc.), plastic cement (such as but not limited to high-molecular polythene, blow-molding nylon, engineering plastics etc.) also can be other single or composite materials that can reach same performance.For composite material, such as but not limited to reinforcing materials such as glass fibre, carbon fiber, boron fibre, graphite fibre, graphene fiber, silicon carbide fibre or aramid fibers.The material forming connector also can be other compound that is organic and/or inorganic material, such as all kinds of fiberglass of glass fiber reinforcement unsaturated polyester, epoxy resin or phenolic resin as matrix resin composition.The thickness of connector is not less than 0.005mm, and preferably, thickness is 0.005mm-3mm, and more preferably, thickness is 0.01mm-2mm, more preferably, thickness is 0.01mm-1mm, and further preferably, thickness is 0.02mm-0.5mm.
The structure of connector can be set to ring-type, preferably, comprise at least one annulus, preferably, comprising at least two annulus, can be donut, also can be non-donut, be connected by least two poles between annulus, pole, from outer shroud to inner ring center radiation, further preferably, comprises at least one oval annulus, further preferably, comprise at least two oval annulus, different oval annulus has different radius of curvature, is connected between annulus by pole, still more preferably, at least one Q-RING is comprised.Connecting-piece structure also can be set to sheet, preferably, sheet arranges pierced pattern, and more preferably, the area of pierced pattern is not less than the area of the non-openwork part of connector.It should be noted that the material of connector in above description, thickness, structure can be combined into different connectors in any way.Such as, cyclic adapting piece can have different thickness distribution, and preferably, strut thickness equals annulus thickness, and further preferably, strut thickness is greater than annulus thickness, and further preferably, the thickness of inner ring is greater than the thickness of outer shroud.
Those of ordinary skill in the art can according to the material of different practical applications decision connector, position and connected mode etc., or above-mentioned different connector attribute is carried out revising, improve or combinationally using, but these are revised and improve still within scope described above.Such as, connector described above is not necessarily necessary, and panel can directly be bridged on shell, also can be bondd by glue and shell.It should be noted that, the shape, size, ratio etc. of the bone-conduction speaker vibration generating portion in practical application are not limited to Fig. 2 A, Fig. 2 B or the content described in Fig. 2 C, bone-conduction speaker is considering that other may affect bone-conduction speaker sound qualitative factor, the leakage interval degree of such as bone-conduction speaker, the frequency multiplication sound, wearing mode etc. of generation, those skilled in the art the content described in figure can make change to a certain degree.
Well-designed and debugging transducing head and panel can solve the frequent problems faced of a lot of bone-conduction speaker.Such as, bone-conduction speaker easily produces Lou sound phenomenon.Leakage sound mentioned here refers in the process of bone-conduction speaker work, and the vibration of loud speaker can produce the sound that environment towards periphery transmits, and except the wearer of loud speaker, other people in environment also can hear the sound that loud speaker sends.The reason of leaking the appearance of sound phenomenon is a lot, the vibration comprising transducing head and panel is delivered to shell by connector and causes the vibration of shell, or the vibration of transducing head causes air vibration in shell, air vibration is transmitted on shell and causes case vibration, thus produces leakage sound.As shown in Fig. 3-A, a kind of equivalent model of vibration of bone-conduction speaker vibration generating portion, comprise stiff end 301, shell 311 and panel 321, be equivalent between stiff end 301 and shell 311 and be connected with damping piece 332 by elastomer 331, be equivalent between shell 311 and panel 321 and connected by elastomer 341.Stiff end 301 can be the relatively-stationary point in bone-conduction speaker position in vibration processes or relatively-stationary region, position (hereinafter can describe in detail).The connected mode that elastomer 331 and damping 332 are linked with between shell by ear frame/earphone determines, influencing factor comprises the rigidity, shape, composition material etc. that ear frame/earphone is linked with, and ear frame/earphone is linked with the material properties with shell connecting portion.Ear frame/earphone mentioned here is linked with the pressure providing and contact with each other between bone-conduction speaker and user.Elastomer 341 is determined by the connected mode between panel 321 (or panel and transducing head form system) and shell 311, and influencing factor comprises above-mentioned connector 240.Then vibration equation can be expressed as:
mx″
2+Rx′
2-k
1(x
1-x
2)+k
2x
2＝0 (1)
Wherein, m is the quality of shell 311, x
1for the displacement of panel 321, x
2for the displacement of shell 311, R is vibration damping, k
1for the stiffness factor of elastomer 341, k
2for the stiffness factor of elastomer 331.(do not consider transient response) when stable vibration, the ratio x of case vibration and panel vibration can be derived
2/ x
1:
The ratio x of case vibration mentioned here and panel vibration
2/ x
1can reflect that bone-conduction speaker leaks sound size.Generally speaking, x
2/ x
1value larger, it is larger compared to the effective vibration passing to hearing system that the vibration of shell is described, under identical volume, leak sound larger; x
2/ x
1value less, it is less compared to the effective vibration passing to hearing system that the vibration of shell is described, under identical volume, leak sound less.As can be seen here, affect the factor that bone-conduction speaker leaks sound size and comprise, connected mode (the stiffness factor k of elastomer 341 between panel 321 (or panel and transducing head form system) and shell 311
1), ear frame/earphone is linked with and enclosure system (k
2, R, m) etc.In one embodiment, the stiffness factor k of elastomer 331
1, outer cover quality m and damping R is relevant with wearing mode to the shape of loud speaker, at k
1, after m, R determine, x
2/ x
1with the stiffness factor k of elastomer 341
1between relation as shown in Fig. 3-B.Can find out by figure, different stiffness factor k
1the ratio of case vibration amplitude and panel vibration amplitude can be affected, i.e. x
2/ x
1.When frequency f is greater than 200Hz, the vibration of shell is all less than the vibration (x of panel
2/ x
1and along with the increase of frequency, the vibration of shell diminishes gradually <1).Especially, as shown in Fig. 3-B, for different k
1value (from left to right successively set stiffness factor be k
25 times, 10 times, 20 times, 40 times, 80 times and 160 times), when frequency is greater than 400Hz, case vibration has been less than 1/10 (x of panel vibration
2/ x
1<0.1).In a particular embodiment, stiffness factor k is reduced
1value (such as, the connector 240 selecting stiffness factor little), effectively can reduce the vibration of shell, thus reduce leak sound.
In a particular embodiment, the connector of certain material and connected mode is used can to reduce leakage sound.Such as, panel, adopt between transducing head and shell and there is certain flexible connector connect, can at panel under vibration by a relatively large margin, the Oscillation Amplitude of shell is less, reduces and leaks sound.The material that can be used for making connector has a variety of, includes but not limited to, stainless steel, beryllium copper, plastic cement (such as, Merlon) etc.The shape of connector can be arranged to a variety of.Such as, connector can be a kind of torus, converge like the spokes of a wheel at the hub at least two poles in torus Zhong Xiang center, and toric thickness is not less than 0.005mm, preferably, thickness is 0.005mm-3mm, and more preferably, thickness is 0.01mm-2mm, again preferably, thickness is 0.01mm-1mm, and further preferably, thickness is 0.02mm-0.5mm.In another example, connector can be a kind of circular ring plate, circular ring plate can be provided with further the annular distance that multi-turn is interrupted, and is formed and be interrupted interval between every ring hole.Again such as, can at shell or panel (or at the vibration passing layer of panels outside, hereinafter can describe in detail) on offer some meet certain condition draw acoustic aperture, can by acoustic vibration guide propagation in shell to outside shell in transducing head vibration processes, the leakage speech wave interaction formed with case vibration, reaches the effect suppressing bone-conduction speaker to leak sound.And for example, the shell that sound-absorbing material is made can be selected, or use sound-absorbing material on housing at least partially.Sound-absorbing material may be used for the one or more inside/outside surfaces on housing, also can be a part of region on housing on an inside/outside surface.Sound-absorbing material refers to the material can to the acoustic energy of incidence by one or more mechanism in the physical attribute of material self (such as but not limited to porousness), membrane action, resonant interaction with the effect of absorption.Especially, sound-absorbing material can be porous material or the material with loose structure, include but not limited to organic fibrous material (such as but not limited to, natural plant fibre, organic synthetic fibers etc.), inorganic fibers (such as but not limited to, mineral wool, mineral wool, aluminium silicate wool and rock wool etc.), metal sound-absorbing material (such as but not limited to, metal fiber acoustic board, foam metal material etc.), rubber sound absorption material, foamed plastics sound-absorbing material (such as but not limited to, polyurethane foam, polyvinyl chloride foam, polyacrylate polystyrene foam, phenolic resin foam etc.) etc., , also can be the flexible material by resonance sound-absorbing, include but not limited to obturator-type foamed plastics, film material, includes but not limited to plastic film, cloth, canvas, varnished cloth or artificial leather, board-like material, includes but not limited to as hardboard, plasterboard, plastic plate, metallic plate) or perforated plate (as punching is obtained on board-like material).Sound-absorbing material can be one or more combination, also can be composite material.Sound-absorbing material can be arranged on shell, also can be separately positioned on the vibration vibration passing layer of shell or shell.
Shell mentioned here, vibration passing layer and jointly form the vibration unit of bone-conduction speaker with the panel that vibration passing laminating closes.Transducing head is arranged in this vibration unit, and by transferring vibrations on vibration unit with the connection of panel and shell.Preferably, it is sound-absorbing material that vibration unit has at least more than 1%, preferred, and vibration unit has the sound-absorbing material more than 5% at least, and further preferably, vibration unit has the sound-absorbing material more than 10% at least.Preferably, shell having at least more than 5% is sound-absorbing material, more preferably, shell having at least more than 10% is sound-absorbing material, and further preferably, shell having more than 40% is sound-absorbing material, again further preferably, shell having at least more than 80% is sound-absorbing material.In a further embodiment, can introduce compensating circuit, the character according to leaking speech sound carries out ACTIVE CONTROL, produces contrary with leaking sound acoustical phase reverse signal, thus suppresses leakage sound.It should be noted that the mode of change bone-conduction speaker tonequality described above can carry out selecting or combinationally using, obtain multiple embodiments, these embodiments are also still in protection scope of the present invention.
Example only just concrete to the description of bone-conduction speaker vibration generating portion structure above, should not be considered to be the embodiment of unique feasible.Obviously, for those skilled in the art, after understanding general principle, may when not deviating from this principle, various correction and change are carried out to the concrete structure and connected mode of implementing vibration, but these are revised and change still within scope described above.Such as, Fig. 2-B, the coupling part 250 in 2-C can be the part on panel 220, adopts glue to be bonded on transducing head 230; Also can be a part (such as, the bossing on oscillating plate) for transducing head 230, adopt glue to be bonded on panel 220; Also can be an independently assembly, adopt glue to be bonded on panel 220 and transducing head 230 simultaneously.Certainly, the connected mode between coupling part 250 and panel 220 or transducing head 230 is not limited to bonding, and other connected modes that those skilled in the art can be known also are applicable to the present invention, such as, can adopt the mode of clamping or welding.Preferably, the mode that glue bonds directly can be adopted between panel 220 and shell 210, more preferably, can be connected by the assembly being similar to elastic component 240, further preferably, can by adding that outside panel 220 mode of vibration passing layer (hereinafter can describe in detail) is connected on shell 210.It should be noted that coupling part 250 describes the schematic diagram that different inter-module connects, those skilled in the art can adopt has similar functions and difform assembly substitutes, and these substitute and change still within the protection range of foregoing description.
In step 103, sound passes to hearing system by transmission system.Transmission system can be, by medium, acoustical vibration is directly passed to hearing system, also can be included in transmission sound process and pass to hearing system again after certain process.
Fig. 4 is a kind of specific embodiment of transmission sound system, bone-conduction speaker in this embodiment operationally, loud speaker 401 contacts after ear, the position such as cheek or forehead, acoustical vibration is passed to skin 402, subcutaneous tissue 403, bone 404 are delivered to cochlea 405, finally pass to brain by cochlea auditory nerve.Human feeling to tonequality can be subject to transmission medium and affect the impact of other factors of transmission medium physical property.Such as, skin and hypodermic density, thickness, the shape of bone, density and vibration in transmittance process may via other tissue of human body etc., all can final tonequality be had an impact.Further, in the transmittance process of vibration, the part of bone-conduction speaker and human contact, the vibration passing efficiency of tissue also can affect final audio.
Such as, vibration is passed to the hearing system of human body by the panel of bone-conduction speaker by tissue, change the material of panel, contact area, shape and/or size, and the interaction force between panel and skin, the transmission efficiency of sound by medium can be affected, thus affect tonequality.Such as, under identical driving, the vibration of the panel transmission of different size has different distributions on wearer's binding face, and then can bring the difference of volume and tonequality.Preferably, the area of panel is not less than 0.15cm
2, more preferably, area is not less than 0.5cm
2, further preferably, area is not less than 2cm
2.Again such as, panel vibrates by the drive of transducing head, the bonding point of panel and transducing head is at the center of panel vibration, preferably, panel is uniform (namely the centre of oscillation is the physical centre of panel) around the mass distribution in the described centre of oscillation, more preferably, make panel around the quality uneven distribution (namely the physical centre of panel is departed from the centre of oscillation) in described vibration.Again such as, an oscillating plate can be connected on multiple panel, shape between multiple panel, material can mutually the same also can be different, can be connected between multiple panel and also can not be connected, multiple panel utilizes multiple approach to transmit acoustical vibration, and the vibration passing mode between different path is different, and the position being delivered to panel is not identical yet, vibration signal between different panels can be complementary, generates comparatively flat frequency response.Again such as, oscillating plate larger for one piece of area is divided into two pieces or the less oscillating plate of polylith area, effectively can improves the uneven vibration that panel deformation causes when high frequency, make frequency response even more ideal.
It should be noted that the physical attribute of panel, such as quality, size, shape, rigidity, vibration damping etc. all can the efficiency of influence surface panel vibration.The panel that those skilled in the art can select suitable material to make according to actual needs, or use different mould that panel is injection molded into different shapes, preferably, the shape of panel can be arranged to rectangle, circle or oval, more preferably, the shape of panel can be rectangle, circle or oval edge are carried out cut after obtain figure (such as but not limited to, circular symmetry cutting is obtained the shape etc. of similar ellipse), further preferably, panel can be arranged to hollow out.Panel material mentioned here includes but not limited to acrylonitrile-butadiene-styrene copolymer (Acrylonitrile butadiene styrene, ABS), polystyrene (Polystyrene, PS), HTPS (High impact polystyrene, HIPS), polypropylene (Polypropylene, PP), polyethylene terephthalate (Polyethyleneterephthalate, PET), polyester (Polyester, PES), Merlon (Polycarbonate, PC), polyamide (Polyamides, PA), polyvinyl chloride (Polyvinyl chloride, PVC), polyurethane (Polyurethanes, PU), polyvinyl dichloride (Polyvinylidene chloride), polyethylene (Polyethylene, PE), polymethyl methacrylate (Polymethyl methacrylate, PMMA), polyether-ether-ketone (Polyetheretherketone, PEEK), phenolic resins (Phenolics, PF), urea-formaldehyde resin (Urea-formaldehyde, UF), melamine formaldehyde resin (Melamine formaldehyde, MF) and some metals, alloy is (as aluminium alloy, chrome-molybdenum steel, scandium alloy, magnesium alloy, titanium alloy, magnesium lithium alloy, nickel alloy etc.) or composite material etc.Relevant parameter comprises the relative density of material, hot strength, modulus of elasticity, Rockwell hardness etc.Preferably, the relative density of panel material is 1.02-1.50, and more preferably, relative density is 1.14-1.45, and further preferably, relative density is 1.15-1.20.The hot strength of panel is not less than 30MPa, and more preferably, hot strength is 33MPa-52MPa, and further preferably, hot strength is not less than 60MPa.The modulus of elasticity of panel material can in 1.0GPa-5.0GPa, and more preferably, modulus of elasticity is at 1.4GPa-3.0GPa, and further preferably, modulus of elasticity is at 1.8GPa-2.5GPa.Similar, the hardness (Rockwell hardness) of panel material can be 60-150, and more preferably, hardness can be 80-120, and further preferably, hardness can be 90-100.Especially, consideration panel material and hot strength simultaneously can be relative density is 1.02-1.1, and hot strength is 33MPa-52MPa, and more preferably, the relative density of panel material is 1.20-1.45, and hot strength is 56-66MPa.
In some other embodiment, the panels outside of bone-conduction speaker is wrapped in vibration passing layer, vibration passing layer and skin contact, and the acoustical vibration of generation is passed to tissue by the vibration system of panel and vibration passing layer composition.Preferably, panels outside wraps up one deck vibration passing layer, more preferably, and panels outside wrapped multiple vibration passing layer; Vibration passing layer can be made up of one or more materials, and the material of different vibration passing layer is formed can be identical, also can be different; Can be mutually superpose on the vertical direction of panel between multi-layer vibration transfer layer, also can be begin to rehearse on the upper berth, direction of panel-level row or the combination of above two kinds of arrangement modes.The area of vibration passing layer can be set as different sizes, and preferably, the area of vibration passing layer is not less than 1cm
2, more preferably, the area of vibration passing layer is not less than 2cm
2, further preferably, the area of vibration passing layer is not less than 6cm
2.
The formation of vibration passing layer can be have certain adsorptivity, flexibility, material chemically, such as plastics (such as but not limited to high-molecular polythene, blow-molding nylon, engineering plastics etc.), rubber also can be other single or composite materials that can reach same performance.For the kind of rubber, such as but not limited to general purpose rubber and Special type rubber.General purpose rubber is including but not limited to natural rubber, isoprene rubber, butadiene-styrene rubber, butadiene rubber, neoprene etc.Special type rubber is again including but not limited to acrylonitrile-butadiene rubber, silicon rubber, fluorubber, polysulfide rubber, polyurethane rubber, chlorohydrin rubber, acrylate rubber, epoxy propane rubber etc.Wherein, butadiene-styrene rubber comprises and is not limited to SBR of emulsion polymerization and solution polymerization styrene-butadiene rubber.For composite material, such as but not limited to reinforcing materials such as glass fibre, carbon fiber, boron fibre, graphite fibre, fiber, graphene fiber, silicon carbide fibre or aramid fibers.Also can be other compound that is organic and/or inorganic material, the such as all kinds of fiberglass of glass fiber reinforcement unsaturated polyester, epoxy resin or phenolic resin as matrix resin composition.Other materials that can be used for making vibration passing layer also comprise one or more the combination in silica gel, polyurethane (Poly Urethane), Merlon (PolyCarbonate).
The existence of vibration passing layer can the frequency response of influential system, changes the tonequality of bone-conduction speaker, also can play the protective effect to element in shell simultaneously.Such as, vibration passing layer can change the mode of vibration of panel, makes the frequency response of entire system milder.The mode of vibration of panel is subject to the impact of the factor such as connected mode, vibration frequency of the connected mode of the attribute of panel own, panel and oscillating plate, panel and vibration passing layer.The attribute of panel own includes but not limited to the quality, size, shape, rigidity, vibration damping etc. of panel.Preferably, can adopt panel in uneven thickness (such as but not limited to, face plate center thickness is greater than edge thickness).The connected mode of panel and oscillating plate includes but not limited to glue bonding, clamping or welding etc.; With the connection of vibration passing layer, panel includes but not limited to that glue is connected; Different vibration frequencies can the different mode of vibration of corresponding panel, comprises translation and the torsion translation in various degree of panels en bloc, selects the panel in particular frequency range with certain vibration mode can change the tonequality of bone-conduction speaker.Preferably, specific frequency range mentioned here can be 20Hz-20000Hz, more preferably, frequency range can be 400Hz-10000Hz, and further preferably, frequency range can be 500Hz-2000Hz, again further preferably, frequency range can be 800Hz-1500Hz.
Preferably, vibration passing layer described above is wrapped in panels outside, forms a side of vibration unit.On vibration passing layer, zones of different is different to the transmission effect of vibration.Such as, existence first contact-making surface region and the second contact-making surface region on vibration passing layer, preferably, the first contact-making surface region not with panel attachment, the second contact-making surface region and panel attachment; More preferably, when vibration passing layer directly or indirectly contacts with user, the clamping force on the first contact-making surface region is less than the clamping force (clamping force mentioned here refers to the pressure between the contact-making surface and user of vibration unit) on the second contact-making surface region; Further preferably, the first contact-making surface region does not directly contact with user, and the second contact-making surface region and user directly contact and transmitting vibrations.The size in the first contact-making surface region and the size in the second contact-making surface region are not etc., preferably, the area in the first contact-making surface region is less than the area in the second contact-making surface region, more preferably, there is aperture in the first contact-making surface region, reduces the area of the first contact area further; The outer surface (namely towards user face) of vibration passing layer can be smooth, also can be uneven, and preferably, the first contact-making surface region and the second contact-making surface region are not at grade; More preferably, the second contact-making surface region is higher than the first contact-making surface region; Further preferably, the second contact-making surface region and the first contact-making surface region form ledge structure; Still more preferably, the second contact-making surface district contacts with user, and the first contact-making surface region does not contact with user.First contact-making surface region and the composition material in the second contact-making surface region can be also can be identical different, can be one or more the combinations in vibration passing layer material described above.Be a kind of form of expression of the present invention for the description of clamping force on contact-making surface above, those skilled in the art can modify to structure described above and mode according to actual needs, and these amendments are still within protection scope of the present invention.Such as, vibration passing layer can be not necessarily, panel can directly contact with user, panel can be arranged different contact-making surface regions, and different contact-making surface regions has and the similar character in the first contact-making surface region described above and the second contact-making surface region.Again such as, contact-making surface can be arranged the 3rd contact-making surface region, 3rd contact-making surface region can be arranged the structure being different from the first contact-making surface region and the second contact-making surface region, and these structures can reducing case vibration, suppress to leak sound, improve in the frequency response curve etc. of vibration unit and obtain certain effect.
As a specific embodiment, Fig. 5-A and 5-B are the front view that is connected with vibration passing layer of panel and end view respectively.Wherein, panel 501 and vibration passing layer 503 are bondd by glue 502, and glue bonding part is positioned at panel 501 two ends, and panel 501 is positioned at the shell of vibration passing layer 503 and housing 504 formation.Preferably, panel 501 is projected as the second contact-making surface region on vibration passing layer 503, and the region be positioned at around the second contact-making surface region is the first contact-making surface region.
Glue can be adopted between panel and vibration passing layer to paste completely, then change the attributes such as the quality of panel, size, shape, rigidity, vibration damping, mode of oscillation equivalently, also make vibration passing efficiency higher; Also paste portion bonding can be only used between panel and transfer layer, then between panel and transfer layer there is gas conduction in non-sticking area, can strengthen the transmission of low-frequency vibration, improves the effect of sound medium and low frequency, preferably, glue area accounts for the 1%-98% of panel area, and more preferably, glue area accounts for the 5%-90% of panel area, again preferably, glue area accounts for the 10%-60% of panel area, and still more preferably, glue area accounts for the 20%-40% of panel area; Also glue can not be used between panel and transfer layer to bond, then the vibration passing efficiency of panel and transfer layer is different from the situation using glue bonding, also can change the tonequality of bone-conduction speaker.In the particular embodiment, the bonding method changing glue can change the mode of vibration of corresponding assembly in bone-conduction speaker, thus changes generation and the transmission effect of sound.Further, the character of glue also can affect the tonequality of bone-conduction speaker, such as glue hardness of water, shear strength, tensile strength and ductility etc.Such as, preferably, glue tensile strength is not less than 1MPa, and more preferably, tensile strength is not less than 2MPa, and further preferably, tensile strength is not less than 5MPa; Preferably, the elongation at break of glue is 100%-500%, and more preferably, elongation at break is 200%-400%; Preferably, the shear strength of glue is not less than 2MPa, and more preferably, shear strength is not less than 3MPa; Preferably, the shore hardness of glue is at 25-30, and more preferably, shore hardness is at 30-50.A kind of glue can be used, also the glue of different attribute can be combinationally used.Glue and panel and the adhesion strength between glue and plastic cement also can be arranged on certain limit, such as but not limited to, in 8MPa-14MPa.It should be noted that the vibration passing layer material in embodiment is not limited to silica gel, also can adopt plastics, biomaterial or other there is certain adsorptivity, flexibility, material chemically.Those skilled in the art also can determine type and the attribute of selecting glue according to actual needs, and the panel material bondd with glue and vibration passing layer material, determines the tonequality of bone-conduction speaker to a certain extent.
Fig. 6 is a specific embodiment of each parts connected mode in bone-conduction speaker vibration generating portion.Transducing head 610 is connected on shell 620, is bondd between panel 630 and vibration passing layer 640 by glue 650, and the edge of vibration passing layer 640 is connected with housing 620.In different embodiments, the distribution of change glue 650, hardness or quantity can be passed through, or the hardness etc. changing transfer layer 640 changes the frequency response of bone-conduction speaker, thus change tonequality.Preferably, panel and vibration passing interlayer can not spreading glue, more preferably, panel and vibration passing interlayer can fill glue, further preferably, panel and vibration passing interlayer portion region spreading glue, more further preferably, the region area of panel and vibration passing interlayer spreading glue is not more than the area of panel.
Those skilled in the art can determine the quantity selecting glue according to actual needs, thus reaches the effect regulating loud speaker tonequality.As shown in Figure 7, in one embodiment, reflect that different glue connected modes is on the impact of the frequency response of bone-conduction speaker.Article three, curve respectively corresponding friction transfer layer and glue, does not fill glue between vibration passing layer and panel, and frequency response when filling glue between vibration passing layer and panel.Can find out, relative to the situation filling glue, coat between vibration passing layer and panel a small amount of glue or not cementing time, the resonance frequency of bone-conduction speaker can offset to low frequency.By the bonding situation of glue between vibration passing layer and panel, the impact of vibration passing layer on vibrational system can be reflected.Therefore, change the bonding mode of glue, the frequency response curve of bone-conduction speaker can be made to have obvious change.
The staff of this area can according to the frequency response demand of reality, bonding mode, the quantity of adjustment and improvement glue, thus improves the tonequality of system.Similar, in another embodiment, Fig. 8 reflects that the hardness of different vibration passing layer is on the impact of vibration response curve.Solid line is the vibration response curve corresponding to bone-conduction speaker adopting harder transfer layer, and dotted line is the vibration response curve corresponding to bone-conduction speaker adopting softer transfer layer.Can find out, adopt the vibration passing layer of different hardness that bone-conduction speaker can be made to obtain different frequency responses.The hardness of vibration passing layer is larger, and the ability transmitting dither is stronger; The hardness of vibration passing layer is less, then the ability transmitting low-frequency vibration is stronger.Select the vibration passing layer (being not limited to silica gel, plastics etc.) of different materials can obtain different tonequality.Such as, the vibration passing layer that bone-conduction speaker uses 45 degree of silica gel to make can obtain good bass effect, and the vibration passing layer using 75 degree of silica gel to make can obtain good high pitch effect.Low frequency mentioned here refers to the sound being less than 500Hz, and intermediate frequency refers to the sound of 500Hz-4000Hz scope, and high frequency refers to the sound being greater than 4000Hz.
Certainly, the above description on glue and vibration passing layer is only a kind of embodiment that can affect bone-conduction speaker tonequality, should not be regarded as the embodiment of unique feasible.Obviously; concerning one of skill in the art; after understanding affects the general principle of bone-conduction speaker tonequality; may when not deviating from this principle; adjust bone-conduction speaker vibrating each device and connected mode in generating portion and change, but these adjustment and change are still within protection range described above.Such as, the material of vibration passing layer can be arbitrary, also can be customize according to the use habit of user.There is use solidification between vibration passing layer and panel after the glue of different hardness, also may have an impact to the tonequality of bone-conduction speaker.In addition, the thickness increasing vibration passing layer can be equivalent to the quality added in the vibrational system of composition, also can reach the effect of the resonance frequency decline being system.Preferably, the thickness of transfer layer is 0.1mm-10mm, and more preferably, thickness is 0.3mm-5mm, more preferably, thickness is 0.5mm-3mm, and further preferably, thickness is 1mm-2mm.The hot strength, viscosity, hardness, tearing strength, percentage elongation etc. of transfer layer also can have an impact to the tonequality of system.Power required on unit range when the hot strength of transfer layer material refers to and causes transfer layer sample to tear, preferably, hot strength is 3.0MPa-13MPa, more preferably, hot strength is 4.0MPa-12.5MPa, and further preferably, hot strength is 8.7MPa-12MPa.Preferably, the shore hardness of transfer layer is 5-90, and more preferably, shore hardness is 10-80, and further preferably, shore hardness is 20-60.When the percentage elongation of transfer layer refers to that transfer layer ruptures relatively and the percentage that increases of raw footage, preferably, percentage elongation is between 90%-1200%, and more preferably, percentage elongation is between 160%-700%, and further preferably, percentage elongation is between 300%-900%.The resistance that otch or indentation expand is hindered when the tearing strength of transfer layer refers to apply strength on the transfer layer having otch, preferably, tearing strength is between 7kN/m-70kN/m, more preferably, tearing strength is between 11kN/m-55kN/m, further preferably, tearing strength is between 17kN/m-47kN/m.
In the vibrational system that panel described above and vibration passing layer form, except changing the physical attribute of panel and transfer layer, and the aspect such as the bonding mode of panel and vibration passing layer, also can from the performance of other aspects change bone-conduction speaker.
A kind of well-designed vibration generating portion comprising vibration passing layer effectively can reduce bone-conduction speaker further and leak sound.Preferably, leakage sound can be reduced in the punching of vibration passing layer surface.As shown in Figure 9, vibration passing layer 940 leads to glue 950 and bonds with panel 930 embodiment, on vibration passing layer with the bonded areas degree of convexity of panel higher than adhesive free region on vibration passing layer 940, be a cavity below non-bonded region.On vibration passing layer 940, non-bonded region and shell 920 surface offer respectively and draw acoustic aperture 960.Preferably, offer the non-bonded region of partly drawing acoustic aperture not contact with user.On the one hand, draw acoustic aperture 960 and effectively can reduce non-bonded region area on vibration passing layer 940, vibration passing layer inner air and outer air can be made penetrating, reduce inner and outer air pressure poor, thus reduce the vibration of non-bonded region; On the other hand, drawing acoustic aperture 960 can vibrate shell 920 inner air the outside that the sound wave formed leads to shell 920, vibrates and promotes the leakage speech ripple that shell outer air formed and disappear mutually, leak speech wave amplitude to reduce with shell 920.Concrete, the leakage sound size of bone-conduction speaker any point is in space proportional to the acoustic pressure P at this some place,
Wherein,
P＝P
0+P
1+P
2(3)
P
0the acoustic pressure that shell (on involving vibrations transfer layer not with the part of skin contact) generates at above-mentioned point, P
1be shell side draw sound that acoustic aperture the transmits acoustic pressure at above-mentioned point, P
2that vibration passing layer draws sound that acoustic aperture the transmits acoustic pressure at above-mentioned point, P
0, P
1, P
2respectively:
Wherein, k represents wave vector, ρ
0represent atmospheric density, ω represents the angular frequency of vibration, and R (x ', y ') to represent in sound source a bit any distance in space, S
0the shell surface territory do not contacted with face, S
1the territory, perforate face that acoustic aperture is drawn in shell side, S
2the strength of sound source of the territory, perforate face of vibration passing layer drawing acoustic aperture, W (x, y) representation unit area,
represent the phase difference of the acoustic pressure that different sound source a bit produces in space.It should be noted that, vibration passing layer exist not with the subregion of skin contact (in such as Fig. 9, the fringe region drawn residing for acoustic aperture 960 on vibration passing layer 940), described region is subject to the impact of panel and case vibration and produces vibration, thus radiation sound to external world, above mentioned shell surface territory should to comprise on this type of vibration passing layer not with the part of skin contact.In space, any point acoustic pressure (when angular frequency is ω) can be expressed as:
Our target reduces the value of P as far as possible, thus reach the effect reducing and leak sound.In actual use, the size and number of being drawn acoustic aperture by adjustment can adjustment factor A1, A2, and the position of acoustic aperture is drawn in adjustment can control phase
value.After the vibrational system understanding panel, transducing head, vibration passing layer and shell composition can affect the principle of bone-conduction speaker tonequality, those skilled in the art can be according to actual needs, adjustment draw acoustic aperture shape, to offer on position, quantity, size and hole damping etc., thus reach the object suppressing to leak sound.Such as, it can be one or more for drawing acoustic aperture, preferably has multiple.Draw acoustic aperture for what lay in shell side face ring-type, the acoustic aperture quantity of drawing in each laying region can be one or more, such as 4-8.The shape of drawing acoustic aperture can be circular, ellipse, rectangle or strip.On a bone-conduction speaker draw that acoustic aperture can adopt shape identical draw acoustic aperture, also can adopt multiple difform combination of drawing acoustic aperture.Such as, what vibration passing layer and shell side laid difformity and quantity respectively draws acoustic aperture, on vibration passing layer draw that acoustic aperture number density is greater than shell side draw acoustic aperture number density.Again such as, vibration passing layer is laid and pays a multiple aperture, can effectively reduce vibration passing layer not with the area of skin contact part, thus reduce the leakage sound produced by this part.Again such as, drawing in acoustic aperture on vibration passing layer/shell side increases damping material or sound-absorbing material, can add the object that high inhibition leaks sound further.Further, drawing acoustic aperture easily extensible described in is that other is convenient to the air vibration in shell to conduct material or the structure of shell.Such as, use phase adjustment material (such as but not limited to sound-absorbing material) as the portion of material of shell, the air vibration phase place making it conduct and the vibration phase of other parts of shell within the scope of 270 °, thus play the effect that sound disappears mutually at 90 °.Lay the description of drawing acoustic aperture about shell to come across and to disclose in the Chinese Patent Application No. 201410005804.0 submitted on January 6th, 2014, name is called " a kind of method and bone-conduction speaker suppressing bone-conduction speaker leakage sound ", and this patent documentation quotes in full in this as reference.Again further, by regulating the connected mode between transducing head and shell, the phase place of other partial vibrations of shell can be changed, also can make it and drawing phase difference that acoustic aperture conducts the sound at 90 ° within the scope of 270 °, thus play the effect that sound disappears mutually.Such as, Flexible Connector is adopted between transducing head and shell, for the material of connector, such as but not limited to, steel (such as but not limited to stainless steel, carbon steel etc.), alloy in lightweight (such as but not limited to aluminium alloy, beryllium copper, magnesium alloy, titanium alloy etc.), plastic cement (such as but not limited to high-molecular polythene, blow-molding nylon, engineering plastics etc.) also can be other single or composite materials that can reach same performance.For composite material, such as but not limited to reinforcing materials such as glass fibre, carbon fiber, boron fibre, graphite fibre, graphene fiber, silicon carbide fibre or aramid fibers.The material forming connector also can be other compound that is organic and/or inorganic material, such as all kinds of fiberglass of glass fiber reinforcement unsaturated polyester, epoxy resin or phenolic resin as matrix resin composition.The thickness of connector is not less than 0.005mm, and preferably, thickness is 0.005mm-3mm, and more preferably, thickness is 0.01mm-2mm, more preferably, thickness is 0.01mm-1mm, and further preferably, thickness is 0.02mm-0.5mm.The structure of connector can be set to ring-type, preferably, comprise at least one annulus, preferably, comprising at least two annulus, can be donut, also can be non-donut, be connected by least two poles between annulus, pole, from outer shroud to inner ring center radiation, further preferably, comprises at least one oval annulus, further preferably, comprise at least two oval annulus, different oval annulus has different radius of curvature, is connected between annulus by pole, still more preferably, at least one Q-RING is comprised.Connecting-piece structure also can be set to sheet, preferably, sheet arranges pierced pattern, and more preferably, the area of pierced pattern is not less than the area of the non-openwork part of connector.It should be noted that the material of connector in above description, thickness, structure can be combined into different connectors in any way.Such as, cyclic adapting piece can have different thickness distribution, and preferably, strut thickness equals annulus thickness, and further preferably, strut thickness is greater than annulus thickness, and further preferably, the thickness of inner ring is greater than the thickness of outer shroud.
One embodiment of the present of invention to the description of sound-absorbing hole above; do not form and the restriction in tonequality, suppression leakage sound etc. is being improved to bone-conduction speaker; the inventor of this area can by carrying out various correction and improvement to execution mode described above, and these are revised and improve still within protection range described above.Such as, preferably, drawing acoustic aperture is only opened on vibration passing layer, more preferably, draw the region that acoustic aperture only starts not overlap with panel at vibration passing layer, further preferably, draw acoustic aperture and be opened on the region do not contacted with user, again preferably, draw acoustic aperture inside vibration unit, be opened on a cavity.Again such as, draw acoustic aperture and also can be opened in outer shell bottom wall, be opened in drawing acoustic aperture quantity and can being one of diapire, being arranged on bottom wall central, also can be multiple, be arranged to around bottom wall central in the form of a ring circumference be uniformly distributed.Again such as, draw acoustic aperture and can be opened on side wall of outer shell, be opened in drawing acoustic aperture quantity and can being one of side wall of outer shell, also can be multiple, be uniformly distributed in circumference.
Describing the vibration passing of bone-conduction speaker is above only concrete example, should not be considered to be the embodiment of unique feasible.Obviously, for those skilled in the art, after the general principle understanding bone-conduction speaker, may when not deviating from this principle, the vibration of bone-conduction speaker is described to the various correction and change carried out in form and details, but these are revised and change still within scope described above.Such as, adopt the ossiphone of implanted directly can be adjacent to human skeleton, acoustical vibration is directly passed to bone, and without skin or hypodermis, the decay that in vibration passing process, frequency response produced by skin or hypodermis and change can be avoided so to a certain extent.And for example, in some applications, conduction position can be tooth, and namely bone-conduction device can be fitted on tooth, acoustical vibration is passed to bone and perienchyma by tooth, also can reduce skin impact on frequency response in vibration processes to a certain extent.Above descriptive object is just played to the introduction of osteoacusis application scenarios; those skilled in the art is after the general principle understanding osteoacusis; bone conduction technology can be applied in different scenes; in these scenes, the transmission of sound can be change the part of pipeline described above, and these change still in protection range described above.
In step 104, the tonequality that human feeling arrives is also relevant with the hearing system of human body, and different crowd may be different to the sensitivity of the sound of different frequency scope.In certain embodiments, the sensitivity of the sound to different frequency of human body can be reflected by equal loudness contour.Some crowd is insensitive to the sound in particular frequency range in voice signal, then show the response intensity of respective frequencies in equal loudness contour lower than the response intensity in other frequencies.Such as, some crowd is insensitive to high-frequency sound signal, in equal loudness contour, namely shows as intensity response at corresponding high-frequency signal lower than the intensity response at other frequency place; Some crowd's centering low frequency sound signals is insensitive, equal loudness contour then shows as intensity response at corresponding medium and low frequency signal lower than the intensity response at other frequency place.Low frequency mentioned here refers to the sound being less than 500Hz, and intermediate frequency refers to the sound of 500Hz-4000Hz scope, and high frequency refers to the sound being greater than 4000Hz.
Certainly, low frequency and the high frequency of sound can be relative, hearing system for some special population responds the difference of sound within the scope of different frequency, optionally change or adjust the distribution of intensity of sound within the scope of corresponding frequencies that bone-conduction speaker produces, corresponding crowd can be made to obtain different sound experience.It should be noted that the high frequency in voice signal discussed above, intermediate frequency or low frequency part can be the descriptions of appropriate section in earshot to normal human ear, also can be the description of appropriate section in loud speaker natural range of sounds to be expressed.
In one embodiment, as shown in curve in Figure 10 3, there is peak value near A dot frequency in the equal loudness contour of the hearing system of some crowd, shows that the sensitivity of this crowd to the sound of frequency near A point is higher than other Frequency points (as B point in figure).When designing bone-conduction speaker, can compensate insensitive frequency-portions in people's ear hearing system.In figure, curve 4 is a kind of bone-conduction speaker frequency response curves carrying out corresponding compensation for audiometric curve 3, near B dot frequency, there is resonance peak.In conjunction with the frequency response curve 4 that the equal loudness contour 3 during people's ear reception sound and bone-conduction speaker produce, the sound that final human body is heard is even more ideal, and sound experience is more broad.As a concrete example, the frequency of A point may be selected in about 500Hz, and the frequency of B point may be selected in about 2000Hz.It should be noted that, above bone-conduction speaker is carried out to the example of corresponding frequencies compensation, should not be considered to be the embodiment of unique feasible, those skilled in the art, can for the suitable peak value value of practical application scene settings and compensation way after its principle of understanding.
Obviously, for those skilled in the art, after understanding dependency basis present principles, may when not deviating from this principle, to implementing the concrete mode of bone-conduction speaker and the various correction selecting to carry out in form and details and change, but these are revised and change still within scope described above.Such as, ossiphone is equally applicable to the method that above bone-conduction speaker carries out frequency response compensation, namely can for the hearing response curve of hearing impaired crowd, the frequency-response characteristic of one or more hearing aidss that design is corresponding makes up its insensitivity to particular frequency range that may show, in actual applications, ossiphone can intelligent selection or carry out the adjustment of frequency response according to the input information of user.Such as, system obtains automatically or user inputs self equal loudness contour, and according to the frequency response of this curve adjustment bone-conduction speaker, compensates the sound of characteristic frequency.In one embodiment, for the point (such as, minimum point on a curve) that loudness in equal loudness contour is lower, the frequency response amplitude of bone-conduction speaker near the frequency that can increase this some correspondence, thus obtain desirable tonequality.Similar, for the point (such as, maximum point on a curve) that loudness in equal loudness contour is higher, the frequency response amplitude of bone-conduction speaker near the frequency that can reduce this some correspondence.Further, the maximal point in the equal loudness contour of frequency response curve described above or people's ear or minimal point can have multiple, and corresponding compensated curve (frequency response curve) also can to there being multiple maximum value or minimum value.To one skilled in the art, in the above description to human auditory's sensitivity, " equal loudness contour " can replace with similar word, such as, and " contour of equal loudness ", " hearing response curve " etc.In fact, human body also can be regarded as a kind of frequency response of sound to hearing sensitivity, in the description of each embodiment in the present invention, in conjunction with the sensitivity of human body to sound and the frequency response of bone-conduction speaker, final body reveals the tonequality of bone-conduction speaker.
Under normal circumstances, the tonequality of bone-conduction speaker is subject to vibration passing relation between the physical property of each part of loud speaker itself, each part, loud speaker and many-sided influencing factor such as extraneous vibration passing relation and the efficiency of vibration passing system when transmitting vibrations.Each components of bone-conduction speaker itself comprises vibrative assembly (such as but not limited to transducing head), the assembly (being linked with such as but not limited to ear frame/earphone) of fixing loud speaker, the assembly (such as but not limited to panel, vibration passing layer etc.) of transmitting vibrations.Between each part, the vibration passing relation in vibration passing relation and loud speaker and the external world is determined by the way of contact (such as but not limited to clamping force, contact area, contact shape etc.) between loud speaker and user.As shown in figure 11, a kind of vibration generation of bone-conduction speaker and transmission system equivalent schematic, the equivalent system comprising a kind of bone-conduction speaker comprises stiff end 1101, sensing terminal 1102, vibration unit 1103, and transducing head 1104.Wherein, stiff end 1101 is by transitive relation K1 (k in Fig. 4
4) be connected with vibration unit 1103, sensing terminal 1102 is by transitive relation K2 (R in Fig. 4
3, k
3) be connected with vibration unit 1103, vibration unit 1103 is by transitive relation K3 (R in Fig. 4
4, k
5) be connected with transducing head 1104.
Vibration unit mentioned here is the vibrating body of panel and transducing head composition, and transitive relation K1, K2 and K3 are the descriptions (will be described in more detail below) of interactively between appropriate section in bone-conduction speaker equivalent system.The vibration equation of equivalent system can be expressed as:
m
3x″
3+R
3x′
3-R
4x′
4+(k
3+k
4)x
3+k
5(x
3-x
4)＝f
3(8)
m
4x″
4+R
4x″
4-k
5(x
3-x
4)＝f
4(9)
Wherein, m
3the equivalent mass of vibration unit 1103, m
4the equivalent mass of transducing head 1104, x
3the equivalent displacement of vibration unit 1103, x
4the equivalent displacement of transducing head 1104, k
3the equivalent elastic coefficient between sensing terminal 1102 and vibration unit 1103, k
4the equivalent elastic coefficient between stiff end 1101 and vibration unit 1103, k
5the equivalent elastic coefficient between transducing head 1104 and vibration unit 1103, R
3the equivalent damping between sensing terminal 1102 and vibration unit 1103, R
4the equivalent damping between transducing head 1104 and vibration unit 1103, f
3and f
4the interaction force between vibration unit 1103 and transducing head 1104 respectively.The equivalent amplitude A of vibration unit in system
3for:
Wherein, f
0representation unit actuating force, ω represents vibration frequency.As can be seen here, the generating portion of the factor involving vibrations of bone-conduction speaker frequency response is affected (such as but not limited to vibration unit, transducing head, shell and be interconnected mode, as m in formula (10)
3, m
4, k
5, R
4deng), vibration passing part (such as but not limited to, with skin contact mode, the attribute that ear frame/earphone is linked with, as k in formula (10)
3, k
4, R
3deng).Change the parameter connected between the structure of bone-conduction speaker each several part and each assembly, such as, change the sizableness of clamping force in change k
4size, change the bonding mode of glue and be equivalent to change R
4and k
5size, change the hardness, elasticity, damping etc. of associated materials and be equivalent to change k
3and R
3size, these can change frequency response and the tonequality of bone-conduction speaker.
In a specific embodiment, stiff end 1101 can be the relatively-stationary point in bone-conduction speaker position in vibration processes or relatively-stationary region, position, these points or region can regard the stiff end of bone-conduction speaker in vibration processes as, stiff end can be made up of specific parts, also can be the position determined according to bone-conduction speaker overall structure.Such as, can be hung by bone-conduction speaker, bonding or be adsorbed near people's ear by specific device, structure and the profile that also can design bone-conduction speaker make osteoacusis position to touch human body skin.
Sensing terminal 1102 is hearing systems that human body receives voice signal; vibration unit 1103 be on bone-conduction speaker for the protection of, support, connect the part of transducing head; comprise the part directly or indirectly contacted with user to the vibration passing layer of user or panel etc. by vibration passing, and protect, support the shell etc. of other vibration producing components.Transducing head 1104 is generation devices of acoustical vibration, can be one or more combination in transducing head discussed above.
Transitive relation K1 is connected and fixed end 1101 and vibration unit 1103, and represent that bone-conduction speaker vibrates the vibration passing relation of generating portion and stiff end in the course of the work, K1 depends on shape and the structure of bone-conduction device.Such as, bone-conduction speaker can be linked with form with U-shaped ear frame/earphone and be fixed on human body head, also can use on the equipment such as mask, glasses of the helmet, smoke helmet or other special purposes by device, shape and the structure of different bone-conduction speakers all can have an impact to vibration passing relation K1, further, the structure of loud speaker also comprises the physical property such as composition material, quality of bone-conduction speaker different piece.Transitive relation K2 connects sensing terminal 402 and vibration unit 1103.
K2 depends on the composition of transmission system, and described transmission system to include but not limited to acoustical vibration by user's organized delivery to hearing system.Such as, when sound passes to hearing system by skin, hypodermis, bone etc., the physical property of different human body tissue and interconnected relationship all can have an impact to K2.Further, vibration unit 1103 contacts with tissue, in different embodiments, the contact-making surface on vibration unit can be a side of vibration passing layer or panel, and the surface configuration of contact-making surface, the interaction force etc. between size and tissue all can affect carry-over factor K2.
The transitive relation K3 of vibration unit 1103 and transducing head 1104 is determined by the connection attribute of bone-conduction speaker vibration generating apparatus inside, transducing head is connected by rigidity or elastic type with vibration unit, or change the relative position of connector between transducing head and vibration unit, capital changes transducing head by vibration passing to vibration unit, especially the transmission efficiency of panel, thus affect transitive relation K3.
In the use procedure of bone-conduction speaker, the generation of sound and transmittance process all can have influence on the tonequality that final human feeling arrives.Such as above-mentioned stiff end, human body sensory terminal, vibration unit, transducing head and transitive relation K1, K2 and K3 etc., may have an impact to the audio quality of bone-conduction speaker.It should be noted that K1, K2, K3 just represent the one relating to different device part or system connected mode in vibration passing process herein, can including but not limited to the transmission efficiency etc. of the conduction pattern of physical connection mode, power, sound.
Be only concrete example to the description of bone-conduction speaker equivalent system above, should not be considered to be the embodiment of unique feasible.Obviously, for those skilled in the art, after the general principle understanding bone-conduction speaker, may when not deviating from this principle, various correction in form and details and change are carried out on the concrete mode and step that affect bone-conduction speaker vibration passing, but these are revised and change still within scope described above.Such as, K1, K2, K3 described above can be simple vibration or mechanics transfer mode, also can comprise complicated non-linear transmission system, transitive relation can be directly be connected to form by various piece, also can be transmitted by contactless mode.
In a specific embodiment, the structure of bone-conduction speaker as shown in figure 12, comprises that ear frame/earphone is linked with 501, vibration unit 1202 and transducing head 1203.Vibration unit 1202 comprises contact-making surface 1202a, shell 1202b, and transducing head 1203 is positioned at vibration unit 1202 inside and is attached thereto.Preferably, vibration unit 502 comprises panel described above and vibration passing layer, and contact-making surface 1202a is the surface that vibration unit 1202 contacts with user, preferably, is the outer surface of vibration passing layer.
In use, ear frame/earphone is linked with the privileged site (such as, head) that bone-conduction speaker to be fixed on user by 1201, for providing clamping force between vibration unit 1202 and user.Contact-making surface 1202a is connected with transducing head 1203, and keeps in touch with user, by sound by vibration passing to user.Stiff end 1101 shown in Figure 11 can the relatively-stationary point in proximate selection position when bone-conduction speaker works.If bone-conduction speaker is structure symmetrically, and suppose the actuating force equal and opposite in direction that in the course of work, both sides transducing head provides, direction is contrary, and it is equivalent stiff end that ear frame/earphone so can be selected to be linked with center position, such as position shown in 1204; If bone-conduction speaker can provide stereo sound, namely the instant actuating force that two place's transducing heads provide differs in size, or structurally there is asymmetry in bone-conduction speaker, then can choose ear frame/earphone be linked with or ear frame/earphone be linked with beyond other point or region as equivalent stiff end.Stiff end mentioned here can be regarded as the relatively-stationary equivalence end in bone-conduction speaker position in vibrative process.Be linked with 1201 by ear frame/earphone between stiff end 1101 and vibration unit 1202 to be connected, transitive relation K1 and ear frame/earphone be linked with 1201 and ear frame/earphone to be linked with 1201 clamping forces provided relevant, depend on that ear frame/earphone is linked with the physical attribute of 1201.Preferably, change ear frame/earphone and be linked with the transmission sound efficiency that the physical quantitys such as the quality that the clamping force, the ear frame/earphone that provide be linked with can change bone-conduction speaker, the frequency response of influential system in particular frequency range.Such as, ear frame/the earphone adopting the higher material of intensity to make is linked with the ear frame/earphone made from the material adopting intensity lower and is linked with and can provides different clamping forces, or change the structure that ear frame/earphone is linked with, being linked with to add at ear frame/earphone to provide the servicing unit of elastic force also can change clamping force, thus affects the transmission efficiency of sound; The change that when wearing, ear frame/earphone is linked with size also can affect the size of clamping force, and clamping force is linked with the increase of two ends vibration unit spacing along with ear frame/earphone and increases.
Be linked with for obtaining the ear frame/earphone meeting specific clamping force condition, those of ordinary skill in the art can select according to actual conditions there is different rigidity, the material of different modulus makes ear frame/earphone and is linked with or adjusts the size and size that ear frame/earphone is linked with.It should be noted that clamping force that ear frame/earphone is linked with not only can affect the transmission efficiency of sound, also can affect the sound experience of user in bass frequency range.Clamping force mentioned here is the pressure between contact-making surface and user, preferably, be clamped between 0.1N-5N, more preferably, clamping force is between 0.2N-4N, further preferably, clamping force is between 0.2N-3N, more preferably, clamping force is between 0.2N-1.5N, still more preferably, clamping force is between 0.3N-1.5N.
The material that ear frame/earphone is linked with can determine the size of clamping force.Preferably, the material that ear frame/earphone is linked with can select the plastics with certain degree of hardness.Such as but not limited to acrylonitrile-butadiene-styrene copolymer (Acrylonitrile butadiene styrene, ABS), polystyrene (Polystyrene, PS), HTPS (High impact polystyrene, HIPS), polypropylene (Polypropylene, PP), polyethylene terephthalate (Polyethylene terephthalate, PET), polyester (Polyester, PES), Merlon (Polycarbonate, PC), polyamide (Polyamides, PA), polyvinyl chloride (Polyvinylchloride, PVC), polyurethane (Polyurethanes, PU), polyvinyl dichloride (Polyvinylidene chloride), polyethylene (Polyethylene, PE), polymethyl methacrylate (Polymethyl methacrylate, PMMA), polyether-ether-ketone (Polyetheretherketone, PEEK), phenolic resins (Phenolics, PF), urea-formaldehyde resin (Urea-formaldehyde, UF), melamine formaldehyde resin (Melamine formaldehyde, MF) etc.More preferably, the material that formation ear frame/earphone is linked with can comprise some a little metals, alloy (as aluminium alloy, chrome-molybdenum steel, scandium alloy, magnesium alloy, titanium alloy, magnesium lithium alloy, nickel alloy etc.) or composite material etc.Further preferably, the material that ear frame/earphone is linked with can select the material with memory function.Memory material includes but not limited to memory alloy material, macromolecule memory material, inorganic non-memory material etc.Memorial alloy includes but not limited to titanium ambrose alloy memorial alloy, titanium ferronickel memorial alloy, titanium nickel chromium triangle memorial alloy, copper nickel system memorial alloy, copper aluminium system memorial alloy, copper zinc system memorial alloy, iron system memorial alloy etc.Macromolecule memory material includes but not limited to polynorbornene, using trans-polyisoprene, Styrene-Butadiene, crosslinked polyethylene, polyurethane, polylactone, fluorine-containing polymer, polyamide, cross-linked polyolefin, polyester etc.Inorganic non-memory material includes but not limited to memory ceramic, memory glass, garnet, mica etc.Further preferably, the memory material that ear frame/earphone is linked with has selected memory temperature, preferably, memory temperature can be elected as and be not less than 10 DEG C, and more preferably, memory temperature is elected as and is not less than 40 DEG C, further preferably, memory temperature is elected as and is not less than 60 DEG C, more preferably, memory temperature is elected as and is not less than 100 DEG C.Memory material accounts for the ratio that ear frame/earphone is linked with material and is no less than 5%, and preferably, this ratio is no less than 7%, and more preferably, this ratio is no less than 15%, and further preferably, this ratio is no less than 30%, more preferably, this ratio is no less than 50%.Ear frame/earphone mentioned here is linked with the rear mounted structure referring to and make bone-conduction speaker produce clamping force.Memory material is in ear frame/earphone and is linked with different positions, preferably, memory material is in ear frame/earphone and is linked with the concentrated position of upper stress, be linked with the connecting portion with vibration unit such as but not limited to ear frame/earphone, near the symmetrical centre that ear frame/earphone is linked with or ear frame/earphone be linked with the densely distributed position etc. of interior circuit.In one embodiment, adopt memorial alloy to make ear frame/earphone and be linked with, for the user's head varied in size, the clamping force difference that it provides is little, makes to wear consistency higher, and the tonequality consistency affected by clamping force is also higher.In another embodiment, after the ear frame/earphone adopting memorial alloy to make, hanger has good elasticity, normally can return to original-shape after standing large deformation, and it still stably can keep the size of clamping force after the long-time deformation of experience.In another embodiment, hang lightweight after the ear frame/earphone adopting memorial alloy to make, the deformation that the degree of freedom is larger can be provided, make its user that can fit better.
Pressure between the contact-making surface that clamping force provides bone-conduction speaker to vibrate generating portion and user.Figure 13-A and Figure 13-B is the vibration response curve of the bone-conduction speaker in an embodiment between contact-making surface and user under different pressures.In vibration passing process, clamping force is lower than the transmission being unfavorable for intermediate frequency and dither after certain threshold value.As shown in (a), for same vibration source (sound source), when clamping force is 0.1N, in the vibration (sound) that wearer receives, intermediate frequency and HFS are obviously less than the vibration (sound) of clamping force for receiving during 0.2N and 1.5N, namely, in tonequality, clamping force is when 0.1N, and intermediate frequency and HFS performance are weaker than the performance of clamping force when 0.2N-1.5N.Meanwhile, in the present embodiment, the clamping force of 0.1N be able to ensure that bone conduction earphone is worn on unlikely on user coming off.Similar, in vibration passing process, clamping force is unfavorable for the transmission of low-frequency vibration after being greater than certain threshold value.As shown in (b), for same vibration source (sound source), when clamping force is 5.0N, the low frequency part of the vibration (sound) that wearer receives obviously is less than the vibration (sound) of clamping force for receiving during 0.2N and 1.5N, namely in tonequality, clamping force is when 5.0N, and low frequency part performance is weaker than the performance of clamping force when 0.2N-1.5N.Meanwhile, in the present embodiment, the clamping force of 5.0N makes user produce the obvious pain sensation.
In the particular embodiment, be linked with material by selecting suitable ear frame/earphone and be linked with result with the suitable ear frame/earphone of setting, the pressure between contact-making surface and user is remained in suitable scope.Pressure between contact-making surface and user is greater than a certain threshold value, and preferably, this threshold value is 0.1N, and more preferably, this threshold value is 0.2N, and further preferably, this threshold value is 0.3N, more preferably, this threshold value is 0.5N.Pressure between contact-making surface and user is less than another threshold value, and preferably, this threshold value is 5.0N, and more preferably, this threshold value is 4N, and further preferably, this threshold value is 3N, more preferably, this threshold value is 1.5N.Those skilled in the art is after the clamping force understanding bone-conduction speaker changes the general principle of osteoacusis system frequency response; can be on this basis; by being linked with material, the amendment of structure and replacement to ear frame/earphone; thus setting meets the clamping force scope that different tonequality requires, and these amendments and replacement are still in the protection range of this specification.
The clamping force of bone-conduction speaker can be measured by specific equipment or method.Figure 14-A and Figure 14-B is a kind of specific embodiment measuring bone-conduction speaker clamping force.A point and B point are that in the present embodiment, bone-conduction speaker ear frame/earphone is linked with 2 points near vibration unit.In test process, fixing A point or B point, another point connects dynamometer, when the distance L between A point and B point is between 125mm ~ 155mm, records clamping force.Figure 14-C is the frequency vibration response curve under a kind of bone-conduction speaker is in different clamping force state, and the clamping force that three curves are corresponding is respectively 0N, 0.61N and 1.05N.Figure 14-C shows the increase along with bone-conduction speaker clamping force, and the load that the vibration unit (such as, panel, the vibration passing layer etc. that with panel be connected) of face to bone-conduction speaker produces can increase thereupon, and the vibration of vibration plane can be weakened.Clamping force too small or cross conference cause bone-conduction speaker the larger unevenness of vibration processes medium frequency response (as clamping force be 0N and 1.05N curve within the scope of 500Hz-800Hz).If clamping force excessive (curve as corresponding when clamping force is 1.05N), can make wearer experience discomfort, the vibration of loud speaker simultaneously dies down, and sound diminishes; If clamping force too small (curve as corresponding when clamping force is 0N), then wearer can experience and comparatively significantly vibrate sense.
It should be noted that the above description to change bone-conduction speaker clamping force method is only concrete example, should not be considered to be the embodiment of unique feasible.Obviously, for those skilled in the art, after the general principle understanding bone-conduction speaker, may when not deviating from this principle, for the bone-conduction speaker of difformity and structure, the mode changing bone-conduction speaker clamping force is changed, but these change still within scope described above.Such as, bone-conduction speaker frame can use the material (such as memory metal) with memory function, the radian that can open according to the adjustment of the head dummy of people, and possesses good elasticity, the comfort level worn can be improved to greatest extent, adjustment clamping force size.Further, bone-conduction speaker frame can be installed the elastoplast 1501 for regulating clamping force, as shown in figure 15, be linked with at ear frame/earphone and depart from equilbrium position and carry out in the process shunk or pull open, elastoplast can provide extra restoring force.
Transitive relation K2 between sensing terminal 1102 and vibration unit 1103 also can have influence on the frequency response of osteoacusis system.The sound that people's ear is heard, depend on the energy that cochlea receives, this energy is subject to the impact of different physical quantities in transmittance process, can be represented by following formula:
P＝∫∫
Sα·f(a,R)·L·ds (11)
Wherein, P is proportional to the energy that cochlea receives, S is the area that contact-making surface 502a contacts with face, α is the coefficient of a dimension conversion, f (a, R) to represent on contact-making surface that the tightness degree R of any acceleration a and contact-making surface and skin contact is on the impact of energy transferring, L is the impedance of mechanical wave transmission on arbitrary contact point, i.e. the transfer impedance of unit are.
From (11), the transmission of sound is subject to the impact of transfer impedance L, and the vibration passing efficiency of osteoacusis system is relevant with L, and the frequency response curve of osteoacusis system is the superposition of the frequency response curve of each point on contact-making surface.Without loss of generality, when describing osteoacusis system contacts face structure, term " contact-making surface " can be the surface carrying out with user at least partly directly or indirectly contacting, and also can be directly or indirectly at least partly to carry out with user contacting, and has certain thickness " contact layer ".The factor that changing affects impedance comprises the size of energy transferring area, shape, degree of roughness, stressed size or distribution of force etc.Such as, changed the transmission effect of sound by the structure and profile changing vibration unit 1202, and then change the tonequality of bone-conduction speaker.Be only exemplarily, change the respective physical characteristic of vibration unit 1202 contact-making surface 1202a, the effect changing transmission sound can be reached.
A kind of well-designed contact-making surface surface is provided with gradient-structure, and described gradient-structure refers to the region that contact-making surface surface exists height change.Gradient-structure can be the structures such as projection that outside contact-making surface, (side of fitting with user) exists/recessed or step-like, also can be the structures such as projection that inside contact-making surface, (dorsad the side of user) exists/recessed or step-like.A kind of vibration unit embodiment of bone-conduction speaker is as shown in Figure 16-A, and contact-making surface 1601 (outside contact-making surface) exists protruding or recessed (not showing in Figure 16-A) part.In the process of bone-conduction speaker work, protruding or negative area and face skin contact, pressure when diverse location contacts with face on change contact-making surface 1601.Bossing contacts tightr with face, the skin contacted with it and hypodermis are subject to the pressure larger than other parts; Accordingly, the skin contacted with recessed portion and hypodermis are subject to the pressure less than other parts.Such as, the contact-making surface 1601 in Figure 16-A exists A, B, C 3 point, lays respectively at the non-bossing of contact-making surface 1601, on bossing edge and bossing.With the process of skin contact, the clamping force size F of A, B, C 3 place suffered by skin
c>F
a>F
b.In certain embodiments, the clamping force size of B point is 0, namely B point not with skin contact.People's face skin and hypodermis show the impedance of sound at various pressures and respond different.The position unit area impedance that pressure is large is little, sound wave is had to the filtering characteristic of deflection high pass, and the position unit area impedance that pressure is little is large, has the filtering characteristic of deflection low pass.The impedance operator L at each position of contact-making surface 1601 is different, according to formula (11), different parts is different to the response of frequency during transmission sound, sound is equivalent to the summation of each position transmission sound by the effect that Full connected face is transmitted, final transmission sound is to forming level and smooth frequency response curve during brain, avoid the appearance having too high resonance peak at low frequency or high frequency, thus obtain frequency response desirable in whole audio bandwidth.Same, the material of contact-making surface 1601 and thickness also can have an impact to the transmission of sound, thus affect acoustical quality.Such as, during contact-making surface made of soft, the sound wave transmission effect of low-frequency range is better than the sound wave transmission of high-frequency range, and when contact-making surface material is harder, the sound wave transmission effect of high-frequency range is better than the sound wave transmission of low-frequency range.
Figure 16-B shows the frequency response of the bone-conduction speaker containing different contact-making surface.The corresponding contact-making surface of dotted line exists the frequency response of the bone-conduction speaker of bulge-structure, the corresponding contact-making surface of solid line does not exist the frequency response of the bone-conduction speaker of bulge-structure.Within the scope of medium and low frequency, the vibration without bulge-structure has obvious weakening relative to the vibration that there is bulge-structure, frequency response curve forms one " dell ", shows as less-than-ideal frequency response, thus affect the tonequality of bone-conduction speaker.
Only the explanation for concrete example to the description of Figure 16-B above, for those skilled in the art, after understanding affects the general principle of bone-conduction speaker frequency response, various correction and change can be carried out to the structure of bone-conduction speaker, assembly, thus obtain different frequency response effects.
It should be noted that for those skilled in the art, the shape of contact-making surface 1601 and structure are not limited to above description, also can be to meet other specific requirement.Such as, the projection on contact-making surface or negative area can be distributed in the edge of contact-making surface, also can be distributed in the middle part of contact-making surface.Contact-making surface may comprise one or more projection or negative area, and protruding and negative area can distribute on the contact surface simultaneously.Projection on contact-making surface or the material of negative area can be other materials different with contact-making surface material, can be flexible, rigidity or are more suitable for the material producing specified pressure gradient; Can be memorizing material, also can be non-memorizing material; Can be the material of single character, also can be composite material.The projection of contact-making surface or the structure graph of negative area include but not limited to zhou duicheng tuxing, centrosymmetric image, Rotational Symmetry figure, asymmetrical graphic etc.The projection of contact-making surface or negative area structure graph can be a kind of figures, also can be the figures of two kinds or two or more combination.Contact-making surface surface includes but not limited in having certain smoothness, roughness, percent ripple etc.The projection of contact-making surface or the position distribution of negative area include but not limited to axial symmetry, Central Symmetry, Rotational Symmetry, asymmetric distribution etc.The projection of contact-making surface or negative area can be at contact-making surface edge, also can be distributed in contact-making surface inside.
In Figure 17,1704-1709 is the specific embodiment of contact face structure described above.
Wherein, in figure shown in 1704 be example contact-making surface comprising the similar projection of multiple shape and structure.Projection can be formed with the same or similar material of panel other parts, also can with the material different from other parts.Especially, projection can be made up of jointly memory material and vibration passing layer material, and wherein the ratio of memory material is no less than 10%, and preferably, in projection, the ratio of memory material is no less than 50%.The area of single projection accounts for the 1%-80% of the gross area, and preferably, the ratio accounting for the gross area is 5%-70%, and more preferably, the ratio accounting for the gross area is 8%-40%.The area sum total of all projections accounts for the 5%-80% of the gross area, and preferably, this ratio is 10%-60%.Projection can have at least 1, and preferably, projection is 1, more preferably, is raised with 2, further preferably, is raised to rare 5.Protruding shape can be circle, ellipse, triangle, rectangle, trapezoidal, irregular polygon or other similar pattern, wherein the structure of bossing can be symmetrical or asymmetrical, the position distribution of bossing also can be symmetrical or asymmetrical, the quantity of bossing can be one or more, the height of bossing can be identical also can be not identical, and protruding height and distribution can form certain gradient.
The example of two or more figure combination that to be a kind of structure of contact-making surface bossing shown in 1705 in figure be, wherein the quantity of the projection of different graphic can be one or more.Two or more convex shape can be two or more the combination any in circle, ellipse, triangle, rectangle, trapezoidal, irregular polygon or other similar pattern.Similar in protruding material, quantity, area, symmetry etc. and Figure 170 4.
In figure, 1706 is that a kind of contact-making surface bossing is distributed in contact-making surface edge and inner example, and wherein the quantity of bossing is not limited to shown in figure.The protruding quantity being positioned at contact-making surface edge accounts for the 1%-80% of all protruding quantity, and preferably, this ratio is 5%-70%, and more preferably, this ratio is 10%-50%, and further preferably, this ratio is 30%-40%.Similar in protruding material, quantity, area, shape, symmetry etc. and Figure 170 4.
In figure, 1707 is structure graphs of a kind of contact-making surface negative area, the structure of negative area can be symmetrical or asymmetrical, the position distribution of negative area also can be symmetrical or asymmetrical, the quantity of negative area can be one or more, the shape of negative area can be identical or different, recessed part can be hollow out.Single recessed area accounts for the 1%-80% of the gross area, and preferably, the ratio accounting for the gross area is 5%-70%, and more preferably, the ratio accounting for the gross area is 8%-40%.All recessed area sum totals account for the 5%-80% of the gross area, and preferably, this ratio is 10%-60%.Recessed can have at least 1, and preferably, recessed is 1, and more preferably, recessed have 2, and further preferably, recessed have 5 at least.Recessed shape can be circle, ellipse, triangle, rectangle, trapezoidal, irregular polygon or other similar pattern.
In figure, 1708 is that a kind of contact-making surface had not only existed bossing but also there is the example of negative area, and quantity that is protruding and negative area is not limited to one or more.The ratio of recessed quantity and protruding quantity is 0.1-100, and preferably, this ratio is 1-80, and more preferably, this ratio is 5-60, and further preferably, this ratio is 10-20.Similar in the material, area, shape, symmetry etc. of single projection/recessed and Figure 170 4.
In figure, 1709 is examples that a kind of contact-making surface has certain percent ripple.Ripple is formed by plural projection/recessed or two assembled arrangement, and preferably, the distance between adjacent protrusion/recessed is equal, and more preferably, the distance between protruding/recessed is equal-difference arrangement.
In figure, 1710 is examples that a kind of contact-making surface exists the projection of one piece of larger area.Protruding area accounts for the 30%-80% of the contact-making surface gross area.Preferably, protruding a part of edge and a part of edge of contact-making surface contact with each other substantially.
In figure, 1711 is that a kind of contact-making surface exists the larger projection of first area, and first projection exists the less projection of second area.The projection of larger area accounts for the 30%-80% of the contact-making surface gross area, accounts for the 1%-30% of the contact-making surface gross area compared with the projection of small size, and preferably, this ratio is 5%-20%.Account for the 5%-80% of larger area compared with small size, preferably, this ratio is 10%-30%.
Be only concrete example to the description of bone-conduction speaker contact face structure above, should not be considered to be the embodiment of unique feasible.Obviously, for those skilled in the art, after understanding bone-conduction speaker contact face structure can affect the general principle of bone-conduction speaker tonequality, may when not deviating from this principle, to the various correction implemented in the concrete mode form of bone-conduction speaker contact-making surface and details and change, but these are revised and change still within scope described above.Such as, protruding or recessed quantity to be not limited in Figure 17 shown, and the amendment also can carrying out to a certain degree to the projection of foregoing description, recessed or contact-making surface picture on surface, these amendments are still in protection range described above.And, the contact-making surface of one or more vibration units that bone-conduction speaker at least contains can use above-mentioned identical or different shape and material, the vibrating effect that different contact-making surface transmits also can produce difference along with the difference of contact-making surface character, the acoustical quality that final acquisition is different.
As shown in Figure 11, the mode of vibration of transducing head 1104 in bone-conduction speaker vibrational system, and the mode K3 be connected with vibration unit 1103 also can have an impact to the audio of system.Preferably, transducing head comprises an oscillating plate, vibration-transmitting plate, one group of coil and a magnetic circuit system, and more preferably, transducing head comprises the compound vibrating device be made up of multiple oscillating plate and vibration-transmitting plate.The sonorific frequency response of system is subject to the impact of the physical property of oscillating plate and vibration-transmitting plate, selects the size of specific oscillating plate and vibration-transmitting plate, shape, material, thickness and vibration passing mode etc., can produce the audio meeting actual requirement.
The embodiment of a compound vibrating device is as shown in Figure 18-A and Figure 18-B, comprise: the complex vibration parts that vibration-transmitting plate 1801 and oscillating plate 1802 form, described vibration-transmitting plate 1801 is set to one first torus 1813, and in this first torus, being provided with three first poles 1814 converge like the spokes of a wheel at the hub to center, the center of its converge like the spokes of a wheel at the hub center and described oscillating plate 1802 is fixed.The center of described oscillating plate 1802 is the groove 1820 coordinating described converge like the spokes of a wheel at the hub center and the first pole.Described oscillating plate 1802 is arranged has second torus 1821 different from described vibration-transmitting plate 1801 radius, and slightly thick three second poles 1822 different from described first pole 1814, first pole 1814 and described second pole 1822 described in when assembling are staggered settings, and can be, but not limited to is 60 degree of angles.
Above-mentioned first pole and the second pole can adopt straight-bar or be arranged to other shape meeting particular requirement, and pole number can be set to two or more, adopt symmetrical or asymmetric arrangement, to meet the requirement of the aspects such as economic, practical effect.Described vibration-transmitting plate 1801 has thin thickness and can increase elastic force, and vibration-transmitting plate 1801 is groove 1820 centers of being stuck in oscillating plate 1802.Voice coil loudspeaker voice coil 1808 is provided with on the downside of the second torus 1821 being bonded in oscillating plate 1802.Compound vibrating device also comprises base plate 1812, and this base plate 1812 is provided with toroidal magnet 1810, in this toroidal magnet 1810, be provided with inner magnet 1811 with one heart; The end face of described inner magnet 1811 is provided with interior magnetic conductive board 1809, on described toroidal magnet 1810, be provided with annular magnetic conductive board 1807 simultaneously, above described annular magnetic conductive board 1807, be fixedly installed packing ring 1806, the first torus 1813 of described vibration-transmitting plate 1801 is fixedly connected with this packing ring 1806.This whole compound vibrating device is connected with outside by a panel 1830, and described panel 1830 is connected converge like the spokes of a wheel at the hub center of described vibration-transmitting plate 1801, and the center at vibration-transmitting plate 1801 and oscillating plate 1802 that is fixed.
Utilize the compound vibrating device of oscillating plate and vibration-transmitting plate composition, obtain frequency response as shown in figure 19, two resonance peaks are created by double complex vibration, by regulating the parameter such as size and material of two parts, allow resonance peak be moved, the resonance peak of low frequency moves to getting over low frequency, and the resonance peak of high frequency is to getting over high-frequency mobile, preferably, the stiffness factor of oscillating plate is greater than the stiffness factor of vibration-transmitting plate.Finally can fit to the frequency response curve of the dotted line shown in Figure 19, namely ideally flat frequency response, the scope of these resonance peaks can be arranged within the frequency range of the sound that people's ear can be heard, also can not be wherein, preferably, in the frequency range of sound that two resonance peaks can not be heard at people's ear; More preferably, within the frequency range of the sound that resonance peak can be heard at people's ear, outside the frequency range of the sound that another resonance peak can be heard at people's ear; Preferred, in the frequency range of the sound that two resonance peaks all can be heard at people's ear; And still more preferably, in the frequency range of the sound that two resonance peaks all can be heard at people's ear, and its crest frequency is between 80Hz-18000Hz; Still more preferably, in the frequency range of the sound that two resonance peaks all can be heard at people's ear, and its peak value is between 200Hz-15000Hz; Still more preferably, in the frequency range of the sound that two resonance peaks all can arrive at people's ear, and its peak value is between 500Hz-12000Hz; Still more preferably, in the frequency range of the sound that two resonance peaks all can arrive at people's ear, and its peak value is between 800Hz-11000Hz.The frequency of the peak value of resonance peak preferably can have certain gap, and such as, the peak value of two resonance peaks differs at least 500Hz; Preferably, the peak value of two resonance peaks differs at least 1000Hz; Still more preferably, the peak value of two resonance peaks differs at least 2000Hz; Again still more preferably, the peak value of two resonance peaks differs at least 5000Hz.In order to reach reasonable effect, two resonance peaks can all within people's ear range of audibility, and the crest frequency of resonance peak differs at least 500Hz; Preferably, two resonance peaks can all within people's ear range of audibility, and the peak value of two resonance peaks differs at least 1000Hz; Again further preferably, two resonance peaks can all within people's ear range of audibility, and the peak value of two resonance peaks differs at least 2000Hz; And still more preferably, two resonance peaks can all within people's ear range of audibility, and the peak value of two resonance peaks differs at least 3000Hz; Can also still more preferably, two resonance peaks can all within people's ear range of audibility, and the peak value of two resonance peaks differs at least 4000Hz.In two resonance peaks can one within people's ear range of audibility, another is outside people's ear range of audibility, and the crest frequency of two resonance peaks differs at least 500Hz; Preferably, a resonance peak is within people's ear range of audibility, and another is outside people's ear range of audibility, and the crest frequency of two resonance peaks differs at least 1000Hz; More preferably, a resonance peak is within people's ear range of audibility, and another is outside people's ear range of audibility, and the crest frequency of two resonance peaks differs at least 2000Hz; Further preferably, a resonance peak is within people's ear range of audibility, and another is outside people's ear range of audibility, and the crest frequency of two resonance peaks differs at least 3000Hz; Still more preferably, a resonance peak is within people's ear range of audibility, and another is outside people's ear range of audibility, and the crest frequency of two resonance peaks differs at least 4000Hz.Two resonance peaks can all between frequency 5Hz-30000Hz, and the crest frequency of two resonance peaks differs at least 400Hz; Preferably, two resonance peaks can all between frequency 5Hz-30000Hz, and the crest frequency of two resonance peaks differs at least 1000Hz; More preferably, two resonance peaks can all between frequency 5Hz-30000Hz, and the crest frequency of two resonance peaks differs at least 2000Hz; Further preferably, two resonance peaks can all between frequency 5Hz-30000Hz, and the crest frequency of two resonance peaks differs at least 3000Hz; Still more preferably, two resonance peaks can all between frequency 5Hz-30000Hz, and the crest frequency of two resonance peaks differs at least 4000Hz.Two resonance peaks can all between frequency 20Hz-20000Hz, and the crest frequency of two resonance peaks differs at least 400Hz; Preferably, two resonance peaks can all between frequency 20Hz-20000Hz, and the crest frequency of two resonance peaks differs at least 1000Hz; More preferably, two resonance peaks can all between frequency 20Hz-20000Hz, and the crest frequency of two resonance peaks differs at least 2000Hz; Further preferably, two resonance peaks can all between frequency 20Hz-20000Hz, and the crest frequency of two resonance peaks differs at least 3000Hz; Still more preferably, two resonance peaks can all between frequency 20Hz-20000Hz, and the crest frequency of two resonance peaks differs at least 4000Hz.Two resonance peaks can all between frequency 100Hz-18000Hz, and the crest frequency of two resonance peaks differs at least 400Hz; Preferably, two resonance peaks can all between frequency 100Hz-18000Hz, and the crest frequency of two resonance peaks differs at least 1000Hz; More preferably, two resonance peaks can all between frequency 100Hz-18000Hz, and the crest frequency of two resonance peaks differs at least 2000Hz; Further preferably, two resonance peaks can all between frequency 100Hz-18000Hz, and the crest frequency of two resonance peaks differs at least 3000Hz; Still more preferably, two resonance peaks can all between frequency 100Hz-18000Hz, and the crest frequency of two resonance peaks differs at least 4000Hz.Two resonance peaks can all between frequency 200Hz-12000Hz, and the crest frequency of two resonance peaks differs at least 400Hz; Preferably, two resonance peaks can all between frequency 200Hz-12000Hz, and the crest frequency of two resonance peaks differs at least 1000Hz; More preferably, two resonance peaks can all between frequency 200Hz-12000Hz, and the crest frequency of two resonance peaks differs at least 2000Hz; Further preferably, two resonance peaks can all between frequency 200Hz-12000Hz, and the crest frequency of two resonance peaks differs at least 3000Hz; Still more preferably, two resonance peaks can all between frequency 200Hz-12000Hz, and the crest frequency of two resonance peaks differs at least 4000Hz.Two resonance peaks can all between frequency 500Hz-10000Hz, and the crest frequency of two resonance peaks differs at least 400Hz; Preferably, two resonance peaks can all between frequency 500Hz-10000Hz, and the crest frequency of two resonance peaks differs at least 1000Hz; More preferably, two resonance peaks can all between frequency 500Hz-10000Hz, and the crest frequency of two resonance peaks differs at least 2000Hz; Further preferably, two resonance peaks can all between frequency 500Hz-10000Hz, and the crest frequency of two resonance peaks differs at least 3000Hz; Still more preferably, two resonance peaks can all between frequency 500Hz-10000Hz, and the crest frequency of two resonance peaks differs at least 4000Hz.So just widen the resonance response scope of loud speaker, be met the tonequality of condition.It should be noted that, in the use procedure of reality, multiple vibration-transmitting plate and oscillating plate can be set, form multi-layer vibration structure, Hz-KHzs corresponding different respectively, realize the loudspeaker vibration that gamut full range rings high-quality, or make frequency response curve reach instructions for use in some particular frequency range.Such as, in ossiphone, in order to meet normal good hearing requirement, can the one or more oscillating plates of selective resonance frequency in the scope of 100Hz-10000Hz, vibration-transmitting plate form transducing head.The description of the compound vibrating device formed about oscillating plate and vibration-transmitting plate comes across and discloses in the Chinese Patent Application No. 201110438083.9 submitted on December 23rd, 2011, name is called that in the patent application of " a kind of bone-conduction speaker and compound vibrating device thereof ", this patent documentation quotes in full in this as reference.
As shown in figure 20, in another embodiment, an oscillating plate 2002 is comprised in vibrational system, first vibration-transmitting plate 2003 and the second vibration-transmitting plate 2001, oscillating plate 2002 and the second vibration-transmitting plate 2001 are fixed on shell 2019 by the first vibration-transmitting plate 2003, the compound vibration systems be made up of oscillating plate 2002, first vibration-transmitting plate 2003 and the second vibration-transmitting plate 2001 can produce and be no less than two resonance peaks, in the hearing system range of audibility, produce flat frequency response curve more, thus improve the tonequality of bone-conduction speaker.Vibrational system equivalent model is as shown in Figure 21-A:
Wherein, 2101 is shell, 2102 is panel, and 2103 is voice coil loudspeaker voice coil, and 2104 is magnetic circuit vibrates, 2105 is the first vibration-transmitting plate, 2106 is the second vibration-transmitting plate, and 2107 is oscillating plate, wherein, first vibration-transmitting plate, the second vibration-transmitting plate and oscillating plate are all abstracted into the element containing elasticity and damping, and shell, panel, voice coil loudspeaker voice coil and magnetic circuit system can all be abstracted into equivalent mass block.The vibration equation of system can be expressed as:
m
6x″
6+R
6(x
6-x
5)′+k
6(x
6-x
5)＝F (12)
m
7x″
7+R
7(x
7-x
5)′+k
7(x
7-x
5)＝-F (13)
m
5x″
5-R
6(x
6-x
5)′-R
7(x
7-x
5)′+R
8x′
5+k
8x
5-k
6(x
6-x
5)-k
7(x
7-x
5)＝0 (14)
Wherein F is actuating force, k
6be the equivalent stiffness coefficient of the second vibration-transmitting plate, k
7for the equivalent stiffness coefficient of oscillating plate, k
8be the equivalent stiffness coefficient of the first vibration-transmitting plate, R
6be the equivalent damping of the second vibration-transmitting plate, R
7for the equivalent damping of oscillating plate, R
8be the equivalent damping of the first vibration-transmitting plate, m
5for the quality of panel, m
6for the quality of magnetic circuit system, m
7for voice coil loudspeaker voice coil quality, x
5for slab movement, x
6for magnetic circuit system displacement, x
7for voice coil loudspeaker voice coil displacement.Then can show that the amplitude of panel 2102 is:
Wherein, ω represents the angular frequency of vibration, f
0representation unit actuating force.
The vibrational system of bone-conduction speaker by panel by vibration passing to user, from formula (15), the vibration efficiency of system is relevant with vibration damping to the stiffness factor of oscillating plate, the first vibration-transmitting plate, the second vibration-transmitting plate, preferably, and the stiffness factor k of oscillating plate
7be greater than the second Oscillating Coefficients k
6, the stiffness factor k of oscillating plate
7be greater than the first Oscillating Coefficients k
8.Wherein, there is the resonance peak number of triple compound vibration systems generations of the first vibration-transmitting plate more than the resonance peak not having the compound vibration systems of the first vibration-transmitting plate to produce, preferably, have three resonance peaks at least; More preferably, within the scope having at least a resonance peak can not hear at people's ear; More preferably, within the scope that resonance peak all can be heard at people's ear; Still more preferably, within the scope that resonance peak all can be heard at people's ear, and its crest frequency is not higher than 18000Hz; Still more preferably, in the frequency range of the sound that resonance peak all can be heard at people's ear, and its peak value is between 100Hz-15000Hz; Still more preferably, in the frequency range of the sound that resonance peak all can arrive at people's ear, and its peak value is between 200Hz-12000Hz; Still more preferably, in the frequency range of the sound that resonance peak all can arrive at people's ear, and its peak value is between 500Hz-11000Hz.The frequency of the peak value of resonance peak preferably can have certain gap, and such as, the peak value that at least there are two resonance peaks differs at least 200Hz; Preferably, the peak value that at least there are two resonance peaks differs at least 500Hz; More preferably, the peak value that at least there are two resonance peaks differs at least 1000Hz; Again further preferably, the peak value that at least there are two resonance peaks differs at least 2000Hz; Again still more preferably, the peak value that at least there are two resonance peaks differs at least 5000Hz.In order to reach reasonable effect, resonance peak can all within people's ear range of audibility, and the crest frequency that at least there are two resonance peaks differs at least 500Hz; Preferably, resonance peak can all within people's ear range of audibility, and the peak value that at least there are two resonance peaks differs at least 1000Hz; More preferably, resonance peak can all within people's ear range of audibility, and the peak value that at least there are two resonance peaks differs at least 1000Hz; Again further preferably, resonance peak can all within people's ear range of audibility, and the peak value that at least there are two resonance peaks differs at least 2000Hz; And still more preferably, resonance peak can all within people's ear range of audibility, and the peak value that at least there are two resonance peaks differs at least 3000Hz; Can also still more preferably, resonance peak can all within people's ear range of audibility, and the peak value that at least there are two resonance peaks differs at least 4000Hz.Can have two in resonance peak within people's ear range of audibility, another is outside people's ear range of audibility, and the crest frequency that at least there are two resonance peaks differs at least 500Hz; Preferably, two resonance peaks are within people's ear range of audibility, and another resonance peak is outside people's ear range of audibility, and the crest frequency that at least there are two resonance peaks differs at least 1000Hz; More preferably, two resonance peaks are within people's ear range of audibility, and another is outside people's ear range of audibility, and the crest frequency that at least there are two resonance peaks differs at least 2000Hz; Further preferably, two resonance peaks are within people's ear range of audibility, and another is outside people's ear range of audibility, and the crest frequency that at least there are two resonance peaks differs at least 3000Hz; Still more preferably, two resonance peaks are within people's ear range of audibility, and another is outside people's ear range of audibility, and the crest frequency that at least there are two resonance peaks differs at least 4000Hz.Can have one in resonance peak within people's ear range of audibility, two other is outside people's ear range of audibility, and the crest frequency that at least there are two resonance peaks differs at least 500Hz; Preferably, a resonance peak is within people's ear range of audibility, and two other resonance peak is outside people's ear range of audibility, and the crest frequency that at least there are two resonance peaks differs at least 1000Hz; More preferably, a resonance peak is within people's ear range of audibility, and two other is outside people's ear range of audibility, and the crest frequency that at least there are two resonance peaks differs at least 2000Hz; Further preferably, a resonance peak is within people's ear range of audibility, and two other is outside people's ear range of audibility, and the crest frequency that at least there are two resonance peaks differs at least 3000Hz; Still more preferably, a resonance peak is within people's ear range of audibility, and two other is outside people's ear range of audibility, and the crest frequency that at least there are two resonance peaks differs at least 4000Hz.Resonance peak can all between frequency 5Hz-30000Hz, and the crest frequency that at least there are two resonance peaks differs at least 400Hz; Preferably, resonance peak can all between frequency 5Hz-30000Hz, and the crest frequency that at least there are two resonance peaks differs at least 1000Hz; More preferably, resonance peak can all between frequency 5Hz-30000Hz, and the crest frequency that at least there are two resonance peaks differs at least 2000Hz; Further preferably, resonance peak can all between frequency 5Hz-30000Hz, and the crest frequency that at least there are two resonance peaks differs at least 3000Hz; Still more preferably, resonance peak can all between frequency 5Hz-30000Hz, and the crest frequency that at least there are two resonance peaks differs at least 4000Hz.Resonance peak can all between frequency 20Hz-20000Hz, and the crest frequency that at least there are two resonance peaks differs at least 400Hz; Preferably, resonance peak can all between frequency 20Hz-20000Hz, and the crest frequency that at least there are two resonance peaks differs at least 1000Hz; More preferably, resonance peak can all between frequency 20Hz-20000Hz, and the crest frequency that at least there are two resonance peaks differs at least 2000Hz; Further preferably, resonance peak can all between frequency 20Hz-20000Hz, and the crest frequency that at least there are two resonance peaks differs at least 3000Hz; Still more preferably, resonance peak can all between frequency 20Hz-20000Hz, and the crest frequency that at least there are two resonance peaks differs at least 4000Hz.Resonance peak can all between frequency 100Hz-18000Hz, and the crest frequency that at least there are two resonance peaks differs at least 400Hz; Preferably, resonance peak can all between frequency 100Hz-18000Hz, and the crest frequency that at least there are two resonance peaks differs at least 1000Hz; More preferably, resonance peak can all between frequency 100Hz-18000Hz, and the crest frequency that at least there are two resonance peaks differs at least 2000Hz; Further preferably, resonance peak can all between frequency 100Hz-18000Hz, and the crest frequency that at least there are two resonance peaks differs at least 3000Hz; Still more preferably, resonance peak can all between frequency 100Hz-18000Hz, and the crest frequency that at least there are two resonance peaks differs at least 4000Hz.Resonance peak can all between frequency 200Hz-12000Hz, and the crest frequency that at least there are two resonance peaks differs at least 400Hz; Preferably, resonance peak can all between frequency 200Hz-12000Hz, and the crest frequency that at least there are two resonance peaks differs at least 1000Hz; More preferably, resonance peak can all between frequency 200Hz-12000Hz, and the crest frequency that at least there are two resonance peaks differs at least 2000Hz; Further preferably, resonance peak can all between frequency 200Hz-12000Hz, and the crest frequency that at least there are two resonance peaks differs at least 3000Hz; Still more preferably, resonance peak can all between frequency 200Hz-12000Hz, and the crest frequency that at least there are two resonance peaks differs at least 4000Hz.Resonance peak can all between frequency 500Hz-10000Hz, and the crest frequency that at least there are two resonance peaks differs at least 400Hz; Preferably, resonance peak can all between frequency 500Hz-10000Hz, and the crest frequency that at least there are two resonance peaks differs at least 1000Hz; More preferably, resonance peak can all between frequency 500Hz-10000Hz, and the crest frequency that at least there are two resonance peaks differs at least 2000Hz; Further preferably, resonance peak can all between frequency 500Hz-10000Hz, and the crest frequency that at least there are two resonance peaks differs at least 3000Hz; Still more preferably, resonance peak can all between frequency 500Hz-10000Hz, and the crest frequency that at least there are two resonance peaks differs at least 4000Hz.In order to obtain reasonable effect further, at least two resonance peaks can within people's ear range of audibility, and the resonance peak produced by the first vibration-transmitting plate is not higher than 20000Hz, preferably, at least two resonance peaks can within people's ear range of audibility, and the resonance peak produced by the first vibration-transmitting plate is not higher than 10000Hz, preferably, at least two resonance peaks can within people's ear range of audibility, and the resonance peak produced by the first vibration-transmitting plate is not higher than 5000Hz, preferably, at least two resonance peaks can within people's ear range of audibility, and the resonance peak produced by the first vibration-transmitting plate is not higher than 2000Hz, preferably, at least two resonance peaks can within people's ear range of audibility, and the resonance peak produced by the first vibration-transmitting plate is not higher than 1000Hz, preferably, at least two resonance peaks can within people's ear range of audibility, and the resonance peak produced by the first vibration-transmitting plate is not higher than 500Hz, preferably, at least two resonance peaks can within people's ear range of audibility, and the resonance peak produced by the first vibration-transmitting plate is not higher than 300Hz, preferably, at least two resonance peaks can within people's ear range of audibility, and the resonance peak produced by the first vibration-transmitting plate is not higher than 200Hz, preferably, at least two resonance peaks can within people's ear range of audibility, and the resonance peak produced by the first vibration-transmitting plate is in 20-20000Hz scope, preferably, at least two resonance peaks can within people's ear range of audibility, and the resonance peak produced by the first vibration-transmitting plate is in 20-10000Hz scope, preferably, at least two resonance peaks can within people's ear range of audibility, and the resonance peak produced by the first vibration-transmitting plate is in 20-5000Hz scope, preferably, at least two resonance peaks can within people's ear range of audibility, and the resonance peak produced by the first vibration-transmitting plate is in 20-2000Hz scope, preferably, at least two resonance peaks can within people's ear range of audibility, and the resonance peak produced by the first vibration-transmitting plate is in 20-1000Hz scope, preferably, at least two resonance peaks can within people's ear range of audibility, and the resonance peak produced by the first vibration-transmitting plate is in 20-500Hz scope, preferably, at least two resonance peaks can within people's ear range of audibility, and the resonance peak produced by the first vibration-transmitting plate is in 20-300Hz scope, preferably, at least two resonance peaks can within people's ear range of audibility, and the resonance peak produced by the first vibration-transmitting plate is in 20-200Hz scope, more preferably, transducing head produces at least two resonance peaks at people's ear range of audibility, and the resonance peak produced by the first vibration-transmitting plate is not higher than 20000Hz, more preferably, transducing head produces at least two resonance peaks at people's ear range of audibility, and the resonance peak produced by the first vibration-transmitting plate is not higher than 10000Hz, more preferably, transducing head produces at least two resonance peaks at people's ear range of audibility, and the resonance peak produced by the first vibration-transmitting plate is not higher than 5000Hz, more preferably, transducing head produces at least two resonance peaks at people's ear range of audibility, and the resonance peak produced by the first vibration-transmitting plate is not higher than 2000Hz, more preferably, transducing head produces at least two resonance peaks at people's ear range of audibility, and the resonance peak produced by the first vibration-transmitting plate is not higher than 1000Hz, more preferably, transducing head produces at least two resonance peaks at people's ear range of audibility, and the resonance peak produced by the first vibration-transmitting plate is not higher than 500Hz, more preferably, transducing head produces at least two resonance peaks at people's ear range of audibility, and the resonance peak produced by the first vibration-transmitting plate is not higher than 300Hz, more preferably, transducing head produces at least two resonance peaks at people's ear range of audibility, and the resonance peak produced by the first vibration-transmitting plate is not higher than 200Hz, more preferably, transducing head produces at least two resonance peaks at people's ear range of audibility, and the resonance peak produced by the first vibration-transmitting plate is in 20-20000Hz scope, more preferably, transducing head produces at least two resonance peaks at people's ear range of audibility, and the resonance peak produced by the first vibration-transmitting plate is in 20-10000Hz scope, more preferably, transducing head produces at least two resonance peaks at people's ear range of audibility, and the resonance peak produced by the first vibration-transmitting plate is in 20-5000Hz scope, more preferably, transducing head produces at least two resonance peaks at people's ear range of audibility, and the resonance peak produced by the first vibration-transmitting plate is in 20-2000Hz scope, more preferably, transducing head produces at least two resonance peaks at people's ear range of audibility, and the resonance peak produced by the first vibration-transmitting plate is in 20-1000Hz scope, more preferably, transducing head produces at least two resonance peaks at people's ear range of audibility, and the resonance peak produced by the first vibration-transmitting plate is in 20-500Hz scope, more preferably, transducing head produces at least two resonance peaks at people's ear range of audibility, and the resonance peak produced by the first vibration-transmitting plate is in 20-300Hz scope, more preferably, transducing head produces at least two resonance peaks at people's ear range of audibility, and the resonance peak produced by the first vibration-transmitting plate is in 20-200Hz scope.In one embodiment, by the triple compound vibration systems utilizing oscillating plate, the first vibration-transmitting plate and the second vibration-transmitting plate to form, the frequency response as shown in Figure 21-B can be obtained, triple compound vibration systems of the first vibration-transmitting plate are had to create three obvious resonance peaks, create flat frequency response more, improve tonequality.
By changing the parameters such as the size of the first vibration-transmitting plate and material, resonance peak can be allowed to be moved, the final frequency response obtained ideally.Such as, the stiffness factor of the first vibration-transmitting plate is reduced to design load, resonance peak can be allowed to move to design attitude to low frequency, bone-conduction speaker frequency response can be made to be highly improved in the sensitivity of low-frequency range, be easy to obtain better tonequality.As shown in Figure 21-C, when the stiffness factor of the first vibration-transmitting plate reduces gradually (described first vibration-transmitting plate from hard to soft), resonance peak moves to low frequency direction, and the sensitivity of bone-conduction speaker frequency response in low-frequency range is significantly improved.Preferably, the first vibration-transmitting plate is a flexure strip.This elasticity is determined by the many-side such as material, thickness, structure of the first vibration-transmitting plate.The material of the first vibration-transmitting plate, such as but not limited to, steel (such as but not limited to stainless steel, carbon steel etc.), alloy in lightweight (such as but not limited to aluminium alloy, beryllium copper, magnesium alloy, titanium alloy etc.), plastic cement (such as but not limited to high-molecular polythene, blow-molding nylon, engineering plastics etc.) also can be other single or composite materials that can reach same performance.For composite material, such as but not limited to reinforcing materials such as glass fibre, carbon fiber, boron fibre, graphite fibre, graphene fiber, silicon carbide fibre or aramid fibers, also can be other compound that is organic and/or inorganic material, the such as all kinds of fiberglass of glass fiber reinforcement unsaturated polyester, epoxy resin or phenolic resin as matrix resin composition.The thickness of the first vibration-transmitting plate is not less than 0.005mm, and preferably, thickness is 0.005mm-3mm, and more preferably, thickness is 0.01mm-2mm, more preferably, thickness is 0.01mm-1mm, and further preferably, thickness is 0.02mm-0.5mm.The structure of the first vibration-transmitting plate can be set to ring-type, preferably, comprise at least one annulus, preferably, comprising at least two annulus, can be donut, also can be non-donut, be connected by least two poles between annulus, pole, from outer shroud to inner ring center radiation, further preferably, comprises at least one oval annulus, further preferably, comprise at least two oval annulus, different oval annulus has different radius of curvature, is connected between annulus by pole, still more preferably, the first vibration-transmitting plate comprises at least one Q-RING.First vibration-transmitting plate structure also can be set to sheet, preferably, arranges pierced pattern above, and the area of pierced pattern is not less than the area not having hollow out.In more than describing, material, thickness, structure can be combined into different vibration-transmitting plates.Such as, ring-type vibration-transmitting plate has different thickness distribution, and preferably, strut thickness equals annulus thickness, and further preferably, strut thickness is greater than annulus thickness, and still more preferably, the thickness of inner ring is greater than the thickness of outer shroud.
Specific embodiment
Embodiment one
A kind of bone-conduction speaker, comprising: a U-shaped ear frame/earphone is linked with, two acoustical vibration unit are fixedly connected with a transducing head in acoustical vibration unit.Vibration unit comprises a contact-making surface and a shell, and described contact-making surface is the outside of silica gel transfer layer.Contact-making surface exists gradient-structure, and described gradient-structure comprises a bulge-structure.Ear frame/earphone is linked with the clamping force of contact-making surface and the skin contact provided, described clamping force uneven distribution on the contact surface.Described gradient-structure part and non-gradient structure division have different transmission sound efficiency.
Embodiment two
The difference of the present embodiment and embodiment one is: comprise a kind of alloy with memory function in the formation that ear frame/earphone is linked with, described ear frame/earphone is linked with and can agrees with the nose curve of different users, and possess good elasticity, there is better comfortable wearing degree.Be linked with the deformation of experience certain hour at ear frame/earphone after, still original-shape can be returned to.Here certain hour, can refer to ten minutes, 30 minutes, one hour, two hours, five hours, also can refer to one day, two days, ten days, one month, 1 year or longer time.The clamping force size that ear frame/earphone is linked with to be provided keeps stable, the situation that can not decline gradually along with the elongated rear clamping force of wear time.The pressure that bone-conduction speaker contacts with human body surface is in some suitable scopes, and time human body is worn, impression produces pain or significantly vibrates sense less than undue pressure.In the process used, the clamping force of bone-conduction speaker is within the scope of 0.2N ~ 1.5N.
Embodiment three
The present embodiment and embodiment one or embodiment two difference are: the coefficient of elasticity that ear frame/earphone is linked with remains in particular range, make bone-conduction speaker in use, frequency response curve at low frequency (such as, below 500Hz) near value higher than the value near high frequency (such as, more than 4000Hz).
Embodiment four
The present embodiment and embodiment one difference are: bone-conduction speaker is integrated on spectacle frame or the helmet, the mask interior of special role.
Embodiment five
The present embodiment and embodiment one difference are: the vibration unit of bone-conduction speaker comprises two or more panel, different panels or different from the gradient-structure on the contact-making surface of the vibration passing layer that panel connects and user.Such as, one of them contact-making surface is bulge-structure, another contact-making surface is groove mechanism; Or the gradient-structure on two contact-making surfaces is all protruding or groove structure, but the shape of bulge-structure, quantity have a difference therebetween at least.
Embodiment six
Can select to adopt multi-frequency response curve in a kind of portable ossiphone, user or tester can select suitable hearing aid response curve to compensate according to the real response curve of hearing system.In addition, according to actual needs, the vibrating device in ossiphone, make hearing aids can produce more satisfactory frequency response in particular frequency range, such as frequency range is at 500Hz ~ 4000Hz.
Embodiment seven
A kind of vibration generating portion of bone-conduction speaker is as shown in Figure 22-A.Wherein, transducing head comprises by magnetic conductive board 2210, the magnetic circuit system that magnet 2211 and magnetic conductor 2212 form, oscillating plate 2214, coil 2215, the first vibration-transmitting plate 2216 and the second vibration-transmitting plate 2217.Shell 2219 given prominence to by panel 2213, and vibrating reed 2214 is bondd by glue, and transducing head is fastened on shell 2219 by the first vibration-transmitting plate 2216, forms suspended structure.
In the process of bone-conduction speaker work, by oscillating plate 2214, triple vibrational systems of the first vibration-transmitting plate 2216 and the second vibration-transmitting plate 2217 composition can produce more flat frequency response curve, thus improve the tonequality of bone-conduction speaker.Transducing head elasticity is connected on shell 2219 by the first vibration-transmitting plate 2216, can lower the vibration that transducing head passes to shell, thus effectively reduces the leakage sound because hull vibration causes, and decreases the vibration of housing to the impact of bone-conduction speaker tonequality.That vibration generating portion case vibration intensity and panel vibration intensity are along with the response curve of frequency shown in Figure 22-B.Wherein, thick line display be the frequency response of use first vibration-transmitting plate 2216 after vibration generating portion, fine rule display be the frequency response not using the first vibration-transmitting plate 2216 after vibration generating portion.Can find out do not have the device of use first vibration-transmitting plate 2216 in the frequency range of more than 500Hz, the vibration of speaker housings is all greater than the device of use first vibration-transmitting plate 2216.Shown in Figure 22-C be vibration generating portion use the first vibration-transmitting plate 2216 and do not use the first vibration-transmitting plate 2,216 two kinds of situations under leakage signal to noise ratio comparatively.Wherein, use the device of the first vibration-transmitting plate 2216 the leakage sound of intermediate frequency (such as about 1000Hz) scope be less than do not use the first vibration-transmitting plate 2216 device at the leakage sound of respective frequencies scope.This shows, after using the first vibration-transmitting plate between panel and shell, effectively can reduce the vibration of shell, thus reduce leakage sound.
Described first vibration-transmitting plate can adopt such as, but not limited to, materials such as stainless steel, beryllium copper, plastic cement, Merlon, and its thickness is in the scope of 0.01mm-1mm.
Embodiment eight
The present embodiment and embodiment seven difference are: as shown in figure 23, and panel 2313 increases vibration passing layer 2320 (such as but not limited to silica gel), and vibration passing layer 2320 can produce certain deformation and adapt to skin shape.The part that vibration passing layer 2320 contacts with panel 2313 higher than the part that vibration passing layer 2320 does not contact with panel 2313, forming station stage structure.The part (part that in Figure 23, vibration passing layer 2320 does not protrude) do not contacted with panel 2313 at vibration passing layer 2320 designs one or more aperture 2321.Leakage sound can be reduced: panel 2313 is died down by the connection of vibration passing layer 2320 with shell 2319 at vibration passing layer design aperture, the vibration that panel 2313 is delivered to shell 2319 by vibration passing layer 2320 reduces, thus decreases shell 2319 and vibrate the leakage sound brought; The part that vibration passing layer 2320 does not protrude arranges aperture 2321 long-pending reduction below, and the air that can drive reduces, and the leakage sound caused by air vibration reduces; After the non-projection of vibration passing layer 2320 arranges aperture 2321, in the shell that the air vibration in housing is formed, sound wave is guided out outside shell, and the leakage speech ripple that the air vibration caused with shell 2319 is formed is cancelled out each other, and reduces to leak sound.
Embodiment nine
The present embodiment and embodiment seven difference are: because panel protrudes speaker housings, use the first vibration-transmitting plate to be connected with speaker housings by panel simultaneously, the degree of coupling of panel and shell reduces greatly, and the first vibration-transmitting plate can provide certain deformation, panel is made to be have the higher degree of freedom fitting with user, can adapt to complicated binding face (in Figure 24-A shown in right figure) better, described first vibration-transmitting plate can make panel produce the inclination of certain angle relative to shell.Preferably, angle of inclination is no more than 5 ゜.
Further, the vibration efficiency of loud speaker is different along with the difference of fit-state.Good fit-state has higher vibration passing efficiency.As shown in Figure 24-B, the vibration passing efficiency under the good state of thick line display laminating, the vibration passing efficiency under the state that fine rule display laminating is bad, can find out, good fit-state vibration passing efficiency is higher.
Embodiment ten
The difference of the present embodiment and embodiment seven is: increase a surrounding edge at the edge of shell, and in the process of shell and skin contact, surrounding edge can make distribution of forces more even, increases the comfort level that bone-conduction speaker is worn.As shown in figure 25, there is difference in height d between surrounding edge 2510 and panel 2513
0.The skin power acted on panel 2513 makes the distance d between panel 2513 and surrounding edge 2510 reduce, and the pressure when between bone-conduction speaker and user is greater than the first vibration-transmitting plate 2516 shape and becomes d
0time suffered power time, unnecessary clamping force can be delivered to skin via surrounding edge 2510, and does not have an impact to the clamping force of oscillating component, makes the consistency of clamping force higher, thus ensures tonequality.
Embodiment 11
As shown in figure 26, panel 2610 is shown in dotted line with the link 2620 of transducing head (not drawing in fig. 26) for panel-shaped.Transducing head passes through link 2620 by vibration passing to panel 2610, then the position residing for link 2620 is the centre of oscillation of panel 2610.The distance on center O distance panel 2610 both sides of link 2620 is respectively L
1and L
2.By changing the size of panel 2610, the position of link 2620 on panel 2610 can change the coating performance of panel and skin and the transmission efficiency of vibration.Preferably, L
1and L
2ratio set for being greater than 1, more preferably, L
1and L
2ratio set for being greater than 1.61, further preferably, L
1and L
2ratio set for being greater than 2.Again such as, large panel, middle panel and small panel can be selected to act in vibrating device.Large panel mentioned here refers to the panel described by Figure 26, and panel 2610 area is greater than the area of link 2620, and middle panel refers to that panel 2610 is identical with link 2620 size, and small panel refers to that the area of panel 2610 is less than the situation of link 2620.The different panel of size and the position of different link 2620, its vibration of transmitting has different distributions on wearer's binding face, and then can bring the difference of volume, tonequality.
Embodiment 12
The present embodiment relates to the multiple configuration of gradient-structure outside bone-conduction speaker vibration unit contact-making surface.As shown in figure 27, gradient-structure is the projection of varying number, and projection is positioned at diverse location outside contact-making surface.A projection is had, near the marginal position of contact-making surface in scheme 1; There is a projection in scheme 2, be positioned at the center of contact-making surface; Contact-making surface there are two projections in scheme 3, respectively near the marginal position of contact-making surface; Three projections are had in scheme 4; Four projections are had in scheme 5.Protruding quantity, position can produce different impacts to the vibration passing efficiency of contact-making surface.As shown in Figure 28-A and 28-B, the contact-making surface without bulge-structure is different from the frequency response curve that the contact-making surface that there is bulge-structure in scheme 1-5 shows.Can find out, after binding face adds gradient-structure (projection), frequency response curve has had within the scope of 300Hz-1100Hz significantly to be raised, and shows after adding gradient-structure, and the medium and low frequency part of sound obtains obvious improvement.
Embodiment 13
The present embodiment relates to the multiple configuration of gradient-structure inside bone-conduction speaker vibration contact-making surface.As shown in figure 29, the gradient-structure of contact-making surface is positioned at the inner side of contact-making surface, i.e. the side of user dorsad.In option A inside vibration passing layer and panel attachment, outside binding face and vibration passing layer, there is certain angle of inclination; There is a ledge structure inside vibration passing layer in option b, step is positioned at the edge of vibration passing layer; There is another ledge structure inside vibration passing layer in scheme C, ledge structure is positioned at vibration passing layer center; Multiple ledge structure is there is inside vibration passing layer in scheme D.Owing to there is gradient-structure inside contact-making surface, contact-making surface is made to have different vibration passing efficiency from the position of difference on the binding face of panel, the frequency response curve of vibration can be widened, make frequency response in certain frequency range more " smooth ", thus improve the tonequality of bone-conduction speaker.
Embodiment 14
The difference of the present embodiment and embodiment eight is: as shown in figure 30, on vibration passing layer 3020 and shell 3019, all acoustic aperture is drawn in design, in the shell that air vibration in housing is formed, sound wave is guided out outside shell by drawing acoustic aperture, the leakage speech ripple that the air vibration caused with shell 3019 is formed is cancelled out each other, and reduces to leak sound.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be noted that; for the person of ordinary skill of the art; without departing from the inventive concept of the premise; some distortion and improvement can also be made; the mode that several change bond-conduction sound disclosed in such as this specification transmit; combination in any and amendment can be carried out, but these amendments and combination are still within claims of the present invention.
Claims (11)
1. improve a method for the tonequality of bone conduction earphone, it is characterized in that,
There is provided bone conduction earphone, the ear frame/earphone of this bone conduction earphone involving vibrations unit, connection vibration unit is linked with,
Described vibration unit at least comprises the contact-making surface directly or indirectly contacted with user;
Make the pressure between the contact-making surface of vibration unit and user be greater than the 3rd threshold value, it makes loud speaker contact-making surface can keep the minimum force contacted with user;
Make the pressure between the contact-making surface of vibration unit and user be less than the 4th threshold value, it is that loud speaker contact-making surface makes user produce the minimum force of the pain sensation.
2. method according to claim 1, it is characterized in that, pressure between the contact-making surface of vibration unit and user is greater than first threshold, described first threshold is greater than described 3rd threshold value, described first threshold can improve the transmission efficiency of intermediate frequency and high-frequency signal, can also improve the tonequality of intermediate frequency and high-frequency signal simultaneously.
3. method according to claim 1, it is characterized in that, the pressure between the contact-making surface of vibration unit and user is made to be less than Second Threshold, described Second Threshold is less than described 4th threshold value, described Second Threshold can improve the transmission efficiency of low frequency signal, can also improve the tonequality of low frequency signal simultaneously.
4. method according to claim 1, is characterized in that, pressure corresponding to described 3rd threshold value is 0.1N: pressure corresponding to described 4th threshold value is 5N.
5. the method according to claim 2,3, is characterized in that, described first threshold is 0.2N; Described Second Threshold is 1.5N.
6. a bone conduction earphone, is characterized in that, this bone conduction earphone involving vibrations unit, ear frame/earphone are linked with, and vibration unit at least comprises the contact-making surface directly or indirectly contacted with user;
Make the pressure between the contact-making surface of vibration unit and user be greater than the 3rd threshold value, it makes loud speaker contact-making surface can keep the minimum force contacted with user;
Make the pressure between the contact-making surface of vibration unit and user be less than the 4th threshold value, it is that loud speaker contact-making surface makes user produce the minimum force of the pain sensation.
7. bone conduction earphone according to claim 6, is characterized in that, the ear frame/earphone of described loud speaker is linked with and comprises memorial alloy or engineering plastic materials.
8. bone conduction earphone according to claim 6, it is characterized in that, pressure between the contact-making surface of vibration unit and user is greater than first threshold, described first threshold is greater than described 3rd threshold value, described first threshold corresponds to and improves intermediate frequency and high frequency transmission efficiency, can also improve intermediate frequency and high frequency tonequality simultaneously.
9. bone conduction earphone according to claim 6, it is characterized in that, the pressure between the contact-making surface of vibration unit and user is made to be less than Second Threshold, described Second Threshold is less than described 4th threshold value, described Second Threshold corresponds to and improves low frequency transmission efficiency, can also improve low frequency tonequality simultaneously.
10. bone conduction earphone according to claim 6, is characterized in that, pressure corresponding to described 3rd threshold value is 0.1N: pressure corresponding to described 4th threshold value is 5N.
11. bone conduction earphones according to Claim 8, described in 9, it is characterized in that, described first threshold is 0.2N; Described Second Threshold is 1.5N.
Priority Applications (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710184192.XA CN106954151B (en) | 2015-08-13 | 2015-08-13 | Bone-conduction speaker |
| CN201710184125.8A CN106954150B (en) | 2015-08-13 | 2015-08-13 | Bone conduction loudspeaker |
| CN201710184303.7A CN106954152B (en) | 2015-08-13 | 2015-08-13 | Bone-conduction speaker |
| CN201710184790.7A CN106954154B (en) | 2015-08-13 | 2015-08-13 | Bone conduction loudspeaker |
| CN201710184786.0A CN106954153B (en) | 2015-08-13 | 2015-08-13 | Bone conduction loudspeaker |
| CN201710184191.5A CN106937221B (en) | 2015-08-13 | 2015-08-13 | Bone-conduction speaker |
| CN201710184792.6A CN106954155B (en) | 2015-08-13 | 2015-08-13 | Bone-conduction speaker |
| CN201710184789.4A CN106937222B (en) | 2015-08-13 | 2015-08-13 | Bone-conduction speaker |
| CN201510496617.1A CN105007551B (en) | 2015-08-13 | 2015-08-13 | Method for improving sound quality of bone conduction earphone and bone conduction earphone |
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|---|---|---|---|
| CN201510496617.1A CN105007551B (en) | 2015-08-13 | 2015-08-13 | Method for improving sound quality of bone conduction earphone and bone conduction earphone |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710184786.0A Division CN106954153B (en) | 2015-08-13 | 2015-08-13 | Bone conduction loudspeaker |
| CN201710184192.XA Division CN106954151B (en) | 2015-08-13 | 2015-08-13 | Bone-conduction speaker |
| CN201710184790.7A Division CN106954154B (en) | 2015-08-13 | 2015-08-13 | Bone conduction loudspeaker |
| CN201710184303.7A Division CN106954152B (en) | 2015-08-13 | 2015-08-13 | Bone-conduction speaker |
| CN201710184789.4A Division CN106937222B (en) | 2015-08-13 | 2015-08-13 | Bone-conduction speaker |
| CN201710184125.8A Division CN106954150B (en) | 2015-08-13 | 2015-08-13 | Bone conduction loudspeaker |
| CN201710184792.6A Division CN106954155B (en) | 2015-08-13 | 2015-08-13 | Bone-conduction speaker |
| CN201710184191.5A Division CN106937221B (en) | 2015-08-13 | 2015-08-13 | Bone-conduction speaker |
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| Publication Number | Publication Date |
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| CN105007551A true CN105007551A (en) | 2015-10-28 |
| CN105007551B CN105007551B (en) | 2017-04-19 |
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| CN201710184789.4A Active CN106937222B (en) | 2015-08-13 | 2015-08-13 | Bone-conduction speaker |
| CN201710184792.6A Active CN106954155B (en) | 2015-08-13 | 2015-08-13 | Bone-conduction speaker |
| CN201510496617.1A Active CN105007551B (en) | 2015-08-13 | 2015-08-13 | Method for improving sound quality of bone conduction earphone and bone conduction earphone |
| CN201710184790.7A Active CN106954154B (en) | 2015-08-13 | 2015-08-13 | Bone conduction loudspeaker |
| CN201710184191.5A Active CN106937221B (en) | 2015-08-13 | 2015-08-13 | Bone-conduction speaker |
| CN201710184786.0A Active CN106954153B (en) | 2015-08-13 | 2015-08-13 | Bone conduction loudspeaker |
| CN201710184303.7A Active CN106954152B (en) | 2015-08-13 | 2015-08-13 | Bone-conduction speaker |
| CN201710184125.8A Active CN106954150B (en) | 2015-08-13 | 2015-08-13 | Bone conduction loudspeaker |
| CN201710184192.XA Active CN106954151B (en) | 2015-08-13 | 2015-08-13 | Bone-conduction speaker |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710184789.4A Active CN106937222B (en) | 2015-08-13 | 2015-08-13 | Bone-conduction speaker |
| CN201710184792.6A Active CN106954155B (en) | 2015-08-13 | 2015-08-13 | Bone-conduction speaker |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710184790.7A Active CN106954154B (en) | 2015-08-13 | 2015-08-13 | Bone conduction loudspeaker |
| CN201710184191.5A Active CN106937221B (en) | 2015-08-13 | 2015-08-13 | Bone-conduction speaker |
| CN201710184786.0A Active CN106954153B (en) | 2015-08-13 | 2015-08-13 | Bone conduction loudspeaker |
| CN201710184303.7A Active CN106954152B (en) | 2015-08-13 | 2015-08-13 | Bone-conduction speaker |
| CN201710184125.8A Active CN106954150B (en) | 2015-08-13 | 2015-08-13 | Bone conduction loudspeaker |
| CN201710184192.XA Active CN106954151B (en) | 2015-08-13 | 2015-08-13 | Bone-conduction speaker |
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| WO2017024595A1 (en) * | 2015-08-13 | 2017-02-16 | 深圳市韶音科技有限公司 | Bone conduction loudspeaker |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN106954153A (en) | 2017-07-14 |
| CN106954154A (en) | 2017-07-14 |
| CN106937221B (en) | 2019-07-19 |
| CN106954154B (en) | 2020-02-11 |
| CN106954152A (en) | 2017-07-14 |
| CN106954153B (en) | 2020-04-14 |
| CN106937222A (en) | 2017-07-07 |
| CN106954152B (en) | 2019-07-19 |
| CN106937222B (en) | 2019-11-12 |
| CN106954150A (en) | 2017-07-14 |
| CN106954155B (en) | 2019-08-16 |
| CN106954151A (en) | 2017-07-14 |
| CN105007551B (en) | 2017-04-19 |
| CN106954150B (en) | 2020-03-27 |
| CN106954155A (en) | 2017-07-14 |
| CN106937221A (en) | 2017-07-07 |
| CN106954151B (en) | 2019-09-06 |
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