CN108200512A - Speaker and its control method - Google Patents
Speaker and its control method Download PDFInfo
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- CN108200512A CN108200512A CN201711477718.XA CN201711477718A CN108200512A CN 108200512 A CN108200512 A CN 108200512A CN 201711477718 A CN201711477718 A CN 201711477718A CN 108200512 A CN108200512 A CN 108200512A
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- 238000005192 partition Methods 0.000 claims abstract description 16
- 230000005855 radiation Effects 0.000 claims description 29
- 238000000926 separation method Methods 0.000 claims 1
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- 208000002925 dental caries Diseases 0.000 description 10
- 238000010586 diagram Methods 0.000 description 5
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- 238000005859 coupling reaction Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
- H04R1/2807—Enclosures comprising vibrating or resonating arrangements
- H04R1/2811—Enclosures comprising vibrating or resonating arrangements for 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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
- H04R1/2807—Enclosures comprising vibrating or resonating arrangements
- H04R1/2815—Enclosures comprising vibrating or resonating arrangements of the bass reflex type
- H04R1/2823—Vents, i.e. ports, e.g. shape thereof or tuning thereof with damping material
- H04R1/2826—Vents, i.e. ports, e.g. shape thereof or tuning thereof with damping material for loudspeaker transducers
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- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Circuit For Audible Band Transducer (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
Abstract
Disclose speaker and its control method.The speaker, including：First cavity；Second cavity is separated by a partition board and first cavity；First loud speaker, in first cavity, wherein being provided with the first opening on the partition board, and first loud speaker is set by the described first opening towards second cavity；Second loud speaker, in second cavity, wherein the outer wall of second cavity is provided with the second opening, second loud speaker is set outside by the described second opening towards second cavity；And controller, for first loud speaker and second loud speaker to be controlled to be worked at the same time according to predetermined way so that effective acoustic volume of second cavity is more than its physical size.
Description
Technical field
This disclosure relates to field of acoustics, more specifically to speaker and its control method.
Background technology
It is fast with the novel audios consumer electronics product such as laptop, tablet computer, flat panel TV, smart mobile phone
Speed development, traditional speaker have the tendency that developing towards miniaturization.
However, although existing small size speaker can obtain certain low frequency dive, such all-bottom sound arbitrarily downgrade it is low,
Distortion is big.As it can be seen that miniaturization key technology is the breakthrough of loudspeaker unit, need to accomplish big under conditions of small size loud speaker
The low-frequency effect and low frequency response of dimension cells loud speaker.How to realize that good low-frequency effect is current in small size speaker
Urgent problem to be solved in loudspeaker design.
Invention content
In view of situation above, is intended to provide a kind of new speaker and its control method, can be realized with small size speaker with
The equivalent low-frequency effect of large volume speaker.
According to one aspect of the disclosure, a kind of speaker is provided, including：First cavity；Second cavity passes through a partition board
Separate with first cavity；First loud speaker in first cavity, is opened wherein being provided with first on the partition board
Mouthful, and first loud speaker is set by the described first opening towards second cavity；Second loud speaker, positioned at described
In two cavitys, wherein the outer wall of second cavity is provided with the second opening, second loud speaker is open by described second
It is set outside towards second cavity；And controller, for control first loud speaker and second loud speaker according to
Predetermined way works at the same time so that effective acoustic volume of second cavity is more than its physical size.
Preferably, in speaker according to an embodiment of the present disclosure, the controller is configured to：When described
When one loud speaker and second loud speaker work at the same time, shaking between first loud speaker and second loud speaker is adjusted
Width is poor so that the first vibrating diaphragm of first loud speaker and the second vibrating diaphragm same-phase of second loud speaker are vibrated, and described
The amplitude of first vibrating diaphragm is less than the amplitude of second vibrating diaphragm.
Preferably, in speaker according to an embodiment of the present disclosure, the Helmholz resonance frequency in first cavity
And the difference of the Helmholz resonance frequency in second cavity is less than predetermined threshold.
Preferably, in speaker according to an embodiment of the present disclosure, on the outer wall of first cavity third is provided with to open
The 4th opening is provided on the outer wall of mouth and/or second cavity, wherein, the speaker further comprises：First paraphase spoke
Component is penetrated, is set by third opening towards outside first cavity, for by the sound wave of the first chamber internal radiation
The external world is transmitted to after paraphase, extraneous sound wave is radiated to by first loud speaker to enhance；And/or the second paraphase irradiation unit
Part is set by the described 4th opening towards outside second cavity, for by the sound wave paraphase of the second chamber internal radiation
After be transmitted to the external world, extraneous sound wave is radiated to by second loud speaker to enhance.
Preferably, in speaker according to an embodiment of the present disclosure, the controller is configured to：
First loud speaker is controlled to work in low-frequency range, and second loud speaker is controlled to work in Whole frequency band.
Preferably, in speaker according to an embodiment of the present disclosure, low-frequency range is divided into the first frequency range and the second frequency range,
And first frequency range is less than second frequency range, also, the controller is configured to：In first frequency range,
First loud speaker and second loud speaker is controlled to work at the same time；In second frequency range, first loud speaker is controlled
Work, and second loud speaker is controlled not work；Other frequency ranges except the low-frequency range control first loud speaker
It does not work, and controls second speaker operation.
According to another aspect of the present disclosure, a kind of control method is provided, applied to a speaker, the speaker includes：The
One cavity；Second cavity is separated by a partition board and first cavity；First loud speaker, in first cavity,
Described in the first opening is provided on partition board, and first loud speaker is set by the described first opening towards second cavity
It puts；In second cavity, wherein the outer wall of second cavity is provided with the second opening, second loud speaker passes through
Towards setting outside second cavity, the control method includes second opening：Control first loud speaker and described
Second loud speaker is worked at the same time according to predetermined way so that effective acoustic volume of second cavity is more than its physical size.
Preferably, in control method according to an embodiment of the present disclosure, first loud speaker and described second are controlled
Loud speaker is worked at the same time according to predetermined way so that effective acoustic volume of second cavity is more than the step of its physical size
Further comprise：When first loud speaker and second loud speaker work at the same time, first loud speaker and institute are adjusted
State the difference of vibration between the second loud speaker so that the first vibrating diaphragm of first loud speaker shakes with the second of second loud speaker
Film same-phase is vibrated, and the amplitude of first vibrating diaphragm is less than the amplitude of second vibrating diaphragm.
Preferably, control method according to an embodiment of the present disclosure further comprises：First loud speaker is controlled low
Band operation, and second loud speaker is controlled to work in Whole frequency band.
Preferably, in control method according to an embodiment of the present disclosure, low-frequency range is divided into the first frequency range and second
Frequency range, and first frequency range is less than second frequency range, also, the control method further comprises：In the described first frequency
Section controls first loud speaker and second loud speaker to work at the same time；In second frequency range, control described first is raised one's voice
Device works, and second loud speaker is controlled not work；Other frequency ranges except the low-frequency range, control described first are raised one's voice
Device does not work, and controls second speaker operation.
By speaker according to an embodiment of the present disclosure and its control method, using manifold type loudspeaker box structure, the sound of coupling
It works in coordination in chamber work, adjusts the amplitude of loud speaker in the different operatic tunes, can speaker operation be realized with the volume of very little
Preferable cavity volume.This cavity volume be it is adjustable, theoretically can be with the operatic tunes volume of equivalent infinity, and the object of cavity
Reason volume does not have to change.Also, this coupling operatic tunes has very high radiation efficiency in low-frequency range.In addition, by adjusting not
With the speaker operation frequency range of the operatic tunes, very high low-frequency sound pressure can be obtained or ensure to reduce while low frequency extension
Distortion reaches the low-frequency effect of large volume speaker.
Description of the drawings
Fig. 1 is the structure diagram for illustrating the speaker according to first embodiment of the present disclosure；
Fig. 2 is the structure diagram for illustrating the speaker according to second embodiment of the present disclosure；And
Fig. 3 is the comparison diagram for showing separately the second cavity B cavity Cs equivalent with it.
Specific embodiment
Each preferred embodiment of the disclosure is described below with reference to accompanying drawings.It provides referring to the drawings
Description, to help the understanding of the example embodiment of the disclosure to being limited by appended claims and their equivalents.It includes side
The various details of assistant's solution, but they can only be counted as illustratively.Therefore, it would be recognized by those skilled in the art that
Embodiment described herein can be made various changes and modifications, without departing from the scope and spirit of the disclosure.Moreover, in order to
Make specification more clear succinct, will omit pair it is well known that the detailed description of function and construction.
First, by the speaker with reference to Fig. 1 descriptions according to first embodiment of the present disclosure.Fig. 1 is illustrated according to the disclosure
The structure diagram of the speaker of first embodiment.
As shown in Figure 1, two cavitys are included according to the speaker 100 of first embodiment of the present disclosure：First cavity A and second
Cavity B.
First cavity A and the second cavity B are separated by a partition board 103.
First loud speaker 101 is located in the first cavity A, wherein being provided with the first opening on the partition board 103, and institute
The first loud speaker 101 is stated to set towards the second cavity B by the described first opening 104.
Second loud speaker 102 is located in the second cavity B, wherein the outer wall of the second cavity B is provided with second and opens
Mouthful, second loud speaker 102 is set outside by the described second opening 105 towards the second cavity B.
In Fig. 1, A cavitys and public first loud speaker 101 of B cavitys, first loud speaker 101 are also referred to as crossed over and are raised one's voice
Device.Meanwhile also exclusive second loud speaker 102 of B cavitys, the also referred to as exclusive loud speaker of second loud speaker 102.
In addition, the speaker 100 according to the disclosure further includes：Controller (not shown).The position of the controller is not
Be particularly limited to, can be located in the first cavity or in the second cavity, naturally it is also possible to positioned at the first cavity and the second cavity it
Outer other positions, as long as it can control the work of the first loud speaker 101 and the second loud speaker 102.The controller
First loud speaker 101 and second loud speaker 102 is controlled to be worked at the same time according to predetermined way so that second cavity
Effective acoustic volume of B is more than its physical size.
Here, it should be noted that effective acoustic volume here refers to generate identical acoustic efficiency (for example, low frequency
Submerged depth and all-bottom sound are arbitrarily downgraded) equivalent physical size.For example, it is assumed that the physical size of a cavity is 500ml, but pass through
The design of structure, the acoustic efficiency obtained are equivalent to the acoustic efficiency that physical size is obtained by the cavity of 1L, then should
Effective acoustic volume of cavity is 1L.
In Fig. 1, the first cavity A is small size speaker according to prior art.The small size speaker has centainly low
Frequency dive, the deficiency but all-bottom sound is arbitrarily downgraded.Second cavity B is increased on the basis of small size speaker according to the design of the disclosure
The coupled resonator added.By controlling first loud speaker 101 and second loud speaker 102 according to predetermined way while work
Make, that is to say, that by intercoupling for two loud speakers, being equivalent to increases a very big babinet of effective acoustic volume.Cause
This, in the speaker according to the disclosure, by only increasing by a second relatively small cavity B, it is possible to realize much larger than second
The preferable cavity volume of the speaker operation of the actual physics volume of cavity B, it is small-sized with speaker so as to solve low-frequency effect
Contradiction between change.
In Fig. 1, the volume of the first cavity A is illustrated as to the volume more than the second cavity B.However, example is only for, and
It is and unrestricted.In the disclosure, and the magnitude relationship that is not specially limited between the first cavity A and the second cavity B.No matter
How are the magnitude relationship of first cavity A and the second cavity B, can realize actual physics volume bigger than the second cavity B
The preferable cavity volume of speaker operation, and then realize low frequency effect more better than low-frequency effect achieved by its physical size
Fruit.Certainly, for the requirement of Miniaturization Design, the usual very little of volume of the second cavity B, volume arrangement mainly considers to raise in satisfaction
Accomplish minimum under the premise of the installation of sound device.
In addition, in Fig. 1, the second loud speaker 102 is illustrated as being aligned in vertical direction with the first loud speaker 101.So
And the disclosure is not limited to that.Second loud speaker 102 can be positioned at any position on the outer wall of the second cavity B.Certainly,
Preferred embodiment shown in Fig. 1 may insure that the control logic for the controller that will be described below is most simple.
Next, by the speaker with reference to Fig. 2 descriptions according to second embodiment of the present disclosure.
As shown in Fig. 2, two cavitys are included according to the speaker 200 of second embodiment of the present disclosure：First cavity A and second
Cavity B.
First cavity A and the second cavity B are separated by a partition board 203.
First loud speaker 201 is located in the first cavity A, wherein being provided with the first opening on the partition board 203, and institute
The first loud speaker 201 is stated to set towards the second cavity B by the described first opening 204.
Second loud speaker 202 is located in the second cavity B, wherein the outer wall of the second cavity B is provided with second and opens
Mouthful, second loud speaker 202 is set outside by the described second opening 205 towards the second cavity B.
In addition, the speaker 200 according to the disclosure further includes：Controller (not shown).The position of the controller is not
Be particularly limited to, can be located in the first cavity or in the second cavity, naturally it is also possible to positioned at the first cavity and the second cavity it
Outer other positions, as long as it can control the work of the first loud speaker 201 and the second loud speaker 202.The controller
First loud speaker 201 and second loud speaker 202 is controlled to be worked at the same time according to predetermined way so that second cavity
Effective acoustic volume of B is more than its physical size.
Fig. 3 is the comparison diagram for showing separately the second cavity B cavity Cs equivalent with it.
Also, in the speaker 200 according to second embodiment of the present disclosure, is provided on the outer wall of first cavity
The 4th opening is provided on the outer wall of three openings and/or second cavity.The opening set on the outer wall of cavity is used to place
Paraphase radiation component described below, therefore the quantity being open is consistent with the quantity of paraphase radiation component.It is shown in Fig. 2
The situation that 206 and the 4th opening 207 of third opening is respectively arranged on the outer wall of the outer wall of first cavity A and the second cavity B is made
For example.Certainly, the disclosure is not limited to that.For example, it is also possible to opening is set only on the outer wall of the second cavity B.In addition,
Third is open to be not particularly limited with the quantity of the 4th opening and position.The outer right wall in the first cavity A is shown in FIG. 2
One third of setting is open, and set one the 4th opening respectively outside the left and right sides of the second cavity B.But institute in Fig. 2
Situation about showing is merely illustrative.The third of any other quantity can also be set to be open and the 4th opening, and third opening and the 4th
Opening can also be placed on any other position on chamber outer wall.
With the opening that is set on outer wall correspondingly, the speaker 200 further comprises：First paraphase radiation component 208
And/or second be oriented to radiation component 209.
First paraphase radiation component 208 is set by third opening 206 towards outside first cavity, for by institute
The external world is transmitted to after stating the sound wave paraphase of the first chamber internal radiation, extraneous sound is radiated to by first loud speaker to enhance
Wave.
Second paraphase radiation component 209 is set outside by the described 4th opening towards second cavity, for by described in
The external world is transmitted to after the sound wave paraphase of second chamber internal radiation, extraneous sound wave is radiated to by second loud speaker to enhance.
In fig. 2, the first paraphase radiation component 208 and the second paraphase radiation component 209 are illustrated as by passively radiating
Device is realized.Passive radiator is similar with loudspeaker unit shape, but without voice coil and drive magnet.Only there are one paper for it
Basin, gets along well any voice coil or circuit is connected.Passive radiator is usually used to adjustment bass so that designer can adjust speaker
Whole tone color.Passive radiator in speaker active cell to carrying out passive sounding under the drive of air in babinet.Certainly, originally
It is open to be not limited to that.Alternatively, the first paraphase radiation component 208 and the second paraphase radiation component 209 can also pass through
Phase-reversing tube is realized.Phase-reversing tube is one section of hollow pipe, passes through the one outlet of speaker front panel or postnotum and free surrounding space phase
It is logical.Basically, phase inverted cabinet is belonged to using the speaker of phase-reversing tube and passive radiator.In the present specification to the two
It is not added with distinguishing, is referred to as phase inverted cabinet.
Next, the description of specific embodiment that the controller will be provided.It is given below about controller
Description can be applied to the speaker according to first embodiment of the present disclosure and second embodiment.
First, the control details that the mode that the controller works at the same time two loud speakers will be described.
The controller is configured to：When first loud speaker and second loud speaker work at the same time,
Adjust the difference of vibration between first loud speaker and second loud speaker.
Assuming that the controller controls the vibrating diaphragm vibration or simultaneously vibration, and amplitude phase downwards upwards simultaneously of two loud speakers
Together, then the gas volume in the second cavity B, which is equivalent to, at this time is uncompressed, so that the volume of the second cavity B is for therein
It is exactly the speaker of a volume infinity for second loud speaker.Therefore, in the speaker according to first embodiment of the present disclosure,
It can control so that two loud speaker in phase vibrations and amplitude is identical, to achieve the effect that the speaker of volume infinity.
However, the speaker of volume infinity is inoperable in some cases, such as it is outlined above according to this public affairs
In the case of the phase inverted cabinet for the second embodiment opened, it is therefore desirable to adjust the reasonable difference of vibration between two loud speakers, make
The effective acoustic volume range that can adjust the second cavity B is obtained from the physical size of the second cavity B to infinite large volume.
Specifically, the controller is configured to be controlled so that the first of first loud speaker shakes
Second vibrating diaphragm same-phase of film and second loud speaker is vibrated, and the amplitude of first vibrating diaphragm is less than second vibrating diaphragm
Amplitude.For example, by adjusting providing to for driving the size of the power input to a machine of diaphragm oscillations that can realize vibrating diaphragm
Amplitude adjusts.
In addition, two loud speakers can connect or can also be in parallel.Also, two loud speakers can also be individually
Use amplifier all the way.The impedance of the two can difference can also be identical.Preferably, the first loud speaker has with the second loud speaker
Identical specification (only needs low frequency specification, the diaphragm of loudspeaker of that leap two sound chambers A and B can not have to consider medium-high frequency
Response), for example, the specification includes the correspondence between applied input power and vibrating diaphragm amplitude.Also, first raises one's voice
Device and the second loud speaker use individually amplifier all the way, and the actual power of the two is different.This preferred embodiment can be with
Control logic when ensuring the difference of vibration between controller two loud speakers of adjustment is relatively easy.Certainly, it the disclosure and not only limits
In this.First loud speaker can also have different specifications, the control that only will lead to controller in this way from the second loud speaker
Logic is more complicated.
The controller controls first loud speaker and second loud speaker to be worked at the same time according to predetermined way, in addition to
So that effective acoustic volume of the second cavity B is more than except its physical size, it is also possible that in first cavity
The difference of Helmholz resonance frequency and the Helmholz resonance frequency in second cavity is less than predetermined threshold.
Speaker drive babinet sends out low frequency response, at this moment the He Muhuo of babinet by the Helmholz resonance of phase inverting box
Hereby resonant frequency is that the volume of babinet and phase-reversing tube or passive radiator determine, unrelated with loud speaker, is one highly stable
Frequency fb.Helmholz resonance frequency fb determines the depth of low frequency dive.At frequency fb, Helmholtz acoustic pressure is far above
The radiation of loud speaker.Therefore, for the first cavity A, since the setting of cavity volume and phase-reversing tube or passive radiator is
It is fixed, therefore the Helmholz resonance frequency fb of the first cavity A is also just secured.
However, effective acoustic volume due to the second cavity B can be adjusted by controlling the working method of two loud speakers
Whole therefore different from the first cavity A, the Helmholz resonance frequency fb of the second cavity B is adjustable.Pass through the control
Device controls first loud speaker and second loud speaker to be worked at the same time according to predetermined way, can having the second cavity B
Effect acoustic volume is adjusted to a Helmholz resonance frequency as the frequency identical with the Helmholz resonance frequency fb of the first cavity A
The volume of ideal of rate.Alternatively, alternatively, the Helmholz resonance frequency of the first cavity A and the Helmholtz of the second cavity B are total to
Vibration frequency might not be identical, and allows the deviation less than predetermined threshold.
The second loud speaker across two cavitys in the vibrating diaphragm of B chambers is not direct radiative acoustic wave, but is small size B sound
Chamber creates an equivalent enormousness operatic tunes.Since the second cavity B can be equivalent to the acoustic volume of bigger, He Muhuo
Hereby resonance efficiency is very high, so as to which the all-bottom sound for obtaining higher is arbitrarily downgraded.In addition, due to the Helmholz resonance in first cavity
Frequency and the Helmholz resonance frequency in second cavity are equal or roughly equal, therefore the first cavity A and the second cavity B
Helmholz resonance can be superimposed, so as to effectively compensating for the first cavity A since all-bottom sound caused by finite volume is arbitrarily downgraded,
It realizes ideal low frequency dive and higher all-bottom sound is arbitrarily downgraded.
Next, the control details that the frequency band that the controller works at the same time two loud speakers will be described.The control
Device processed is configured to：First loud speaker is controlled to work in low-frequency range, and controls second loud speaker in full range
Band work.Since the purpose of the disclosure is the radiation efficiency of raising low-frequency range, the first loud speaker and the second loud speaker exist
Low-frequency range works at the same time.As mentioned above it is possible, being worked at the same time by two loud speakers, intercouple, it can be with the volume of very little
Realize the preferable cavity volume of speaker operation.And there was only the second speaker operation in other frequency ranges, to save power consumption.
It, can be with it is highly preferred that as alternatively possible embodiment in addition, for further the considerations of saving power consumption
Low-frequency range is divided further into the first frequency range and the second frequency range, and first frequency range is less than second frequency range.In fact, I
More value is low frequency performance in the first lower frequency range.Therefore, with the second loud speaker for describing before in Whole frequency band work
Make difference, consider to stop the work of the second loud speaker in the second frequency range.The controller is configured to：Described
One frequency range controls first loud speaker and second loud speaker to work at the same time；In second frequency range, control described first
Speaker operation, and second loud speaker is controlled not work；Other frequency ranges except the low-frequency range, control described first
Loud speaker does not work, and controls second speaker operation.So as to work with the second loud speaker described before in Whole frequency band
It compares, can further save power consumption of second loud speaker in the second frequency range.
Specifically, at the low frequency near fb, the Helmholtz radiation for the C operatic tunes that frequency is fb is equivalent to, monopolizes and raises
The acoustic radiation of sound device, B operatic tunes Helmholtz radiation three's cophase stacking.
As frequency rises, because acoustic radiation is imitated near the corresponding Helmholz resonance frequency of physical size of the B operatic tunes
Rate is high, can close exclusive loud speaker, and the Helmholtz that the B operatic tunes is operated alone across loud speaker is allowed to radiate.Closing exclusive raise
In the case of sound device, the physical size of B sound chambers is small, for across loud speaker, can form the band logical bass of a double-tone chamber
Speaker.The vibrating diaphragm of the passive radiator of B sound chambers and exclusive loud speaker (passive radiator is equivalent to when not powered) can be common
Equivalent greater area of passive radiator is formed, a new Helmholtz spoke can be formed in frequency more higher than fb
It penetrates, the Helmholtz of two different frequencies of two operatic tunes of A, B radiates to form above-mentioned band general formula woofer.
Frequency is further up, closes across loud speaker, exclusive loud speaker is allowed individually to radiate medium-high frequency sound wave.
Hereinbefore, the concrete configuration of the speaker according to the embodiment of the present disclosure is described in detail referring to figs. 1 to Fig. 3.
Next, by the control method for being applied to the speaker according to the embodiment of the present disclosure is described.As mentioned above it is possible, the speaker packet
It includes：First cavity；Second cavity is separated by a partition board and first cavity；First loud speaker, positioned at first cavity
In, wherein being provided with the first opening on the partition board, and first loud speaker is open by described first towards described second
Cavity is set；In second cavity, wherein the outer wall of second cavity is provided with the second opening, described second raises one's voice
Device is set outside by the described second opening towards second cavity.
The control method includes：First loud speaker and second loud speaker are controlled according to predetermined way while work
Make so that effective acoustic volume of second cavity is more than its physical size.
By the way that first loud speaker and second loud speaker is controlled to be worked at the same time according to predetermined way, that is to say, that
By intercoupling for two loud speakers, being equivalent to increases a very big babinet of effective acoustic volume.Therefore, according to this public affairs
In the speaker opened, by only increasing by a second relatively small cavity, it is possible to realize the actual physics much larger than the second cavity
The preferable cavity volume of the speaker operation of volume, so as to solve the contradiction between low-frequency effect and speaker miniaturization.
First, will the control details of mode that worked at the same time for two loud speakers be described.
Specifically, first loud speaker and second loud speaker is controlled to be worked at the same time according to predetermined way so that institute
The effective acoustic volume for stating the second cavity further comprises more than the step of its physical size：
When first loud speaker and second loud speaker work at the same time, first loud speaker and described the are adjusted
Difference of vibration between two loud speakers.
Assuming that the controller controls the vibrating diaphragm vibration or simultaneously vibration, and amplitude phase downwards upwards simultaneously of two loud speakers
Together, then the gas volume in the second cavity, which is equivalent to, at this time is uncompressed, so as to the second cavity volume for therein the
It is exactly the speaker of a volume infinity for two loud speakers.However, the speaker of volume infinity is cannot in some cases
Work, such as in the case of the phase inverted cabinet being outlined above, it is therefore desirable to adjust rationally shaking between two loud speakers
Width is poor so that can adjust effective acoustic volume range of the second cavity from the physical size of the second cavity to infinite large volume.
Specifically, it when first loud speaker and second loud speaker work at the same time, adjusts described first and raises one's voice
The step of difference of vibration between device and second loud speaker, further comprises：It is controlled so that first loud speaker
Second vibrating diaphragm same-phase of the first vibrating diaphragm and second loud speaker is vibrated, and the amplitude of first vibrating diaphragm is less than described second
The amplitude of vibrating diaphragm.For example, by adjusting providing to for driving the size of the power input to a machine of diaphragm oscillations that can realize
The amplitude adjustment of vibrating diaphragm.
The amplitude of exclusive loud speaker is more than the amplitude across loud speaker, therefore the acoustic pressure of B cavitys will necessarily act on leap
On loud speaker, so can obtain the added force other than itself across loud speaker, this can increase the Helmholtz radiation of B cavitys
Acoustic pressure.
First loud speaker and second loud speaker is controlled to be worked at the same time according to predetermined way, in addition to causing described
Effective acoustic volume of two cavitys is more than except its physical size, it is also possible that the Helmholz resonance in first cavity
The difference of frequency and the Helmholz resonance frequency in second cavity is less than predetermined threshold.
Speaker drive babinet sends out low frequency response, at this moment the He Muhuo of babinet by the Helmholz resonance of phase inverting box
Hereby resonant frequency is that the volume of babinet and phase-reversing tube or passive radiator determine, unrelated with loud speaker, is one highly stable
Frequency fb.Helmholz resonance frequency fb determines the depth of low frequency dive.At frequency fb, Helmholtz acoustic pressure is far above
The radiation of loud speaker.Therefore, for the first cavity A, since the setting of cavity volume and phase-reversing tube or passive radiator is
It is fixed, therefore the Helmholz resonance frequency fb of the first cavity A is also just secured.
However, effective acoustic volume due to the second cavity B can be adjusted by controlling the working method of two loud speakers
Whole therefore different from the first cavity A, the Helmholz resonance frequency fb of the second cavity B is adjustable.Pass through the control
Device controls first loud speaker and second loud speaker to be worked at the same time according to predetermined way, can having the second cavity B
Effect acoustic volume is adjusted to a Helmholz resonance frequency as the frequency identical with the Helmholz resonance frequency fb of the first cavity A
The volume of ideal of rate.Alternatively, alternatively, the Helmholz resonance frequency of the first cavity A and the Helmholtz of the second cavity B are total to
Vibration frequency might not be identical, and allows the deviation less than predetermined threshold.
Since the second cavity B can be equivalent to the acoustic volume of bigger, Helmholz resonance efficiency is very high, so as to obtain
Higher all-bottom sound is obtained to arbitrarily downgrade.In addition, due in the Helmholz resonance frequency in first cavity and second cavity
Helmholz resonance frequency it is equal or roughly equal, therefore the Helmholz resonance of the first cavity A and the second cavity B can be folded
Add, so as to effectively compensate for the first cavity A since all-bottom sound caused by finite volume is arbitrarily downgraded, realize ideal low frequency dive
Higher all-bottom sound is arbitrarily downgraded.
Next, by the control details of frequency band worked at the same time for two loud speakers is described.The control method is into one
Step includes：First loud speaker is controlled to work in low-frequency range, and second loud speaker is controlled to work in Whole frequency band.Due to this
Disclosed purpose is to improve the radiation efficiency of low-frequency range, therefore the first loud speaker and the second loud speaker are in low-frequency range work simultaneously
Make.As mentioned above it is possible, being worked at the same time by two loud speakers, intercouple, can loud speaker work be realized with the volume of very little
The preferable cavity volume of work.And there was only the second speaker operation in other frequency ranges, to save power consumption.
It, can be with it is highly preferred that as alternatively possible embodiment in addition, for further the considerations of saving power consumption
Low-frequency range is divided further into the first frequency range and the second frequency range, and first frequency range is less than second frequency range.In fact, I
More value is low frequency performance in the first lower frequency range.Therefore, with the second loud speaker for describing before in Whole frequency band work
Make difference, consider to stop the work of the second loud speaker in the second frequency range.Specifically, the control method further comprises：
In first frequency range, first loud speaker and second loud speaker is controlled to work at the same time；In second frequency range, control
First speaker operation, and second loud speaker is controlled not work；Other frequency ranges except the low-frequency range, control
First loud speaker does not work, and controls second speaker operation.So as to the second loud speaker for describing before complete
Band operation is compared, and can further save power consumption of second loud speaker in the second frequency range.
So far, the speaker and its control method according to the embodiment of the present disclosure has been described in detail with reference to the accompanying drawings.It is logical
The speaker and its control method according to the embodiment of the present disclosure are crossed, it is mutual in the sound chamber work of coupling using manifold type loudspeaker box structure
Cooperation adjusts the amplitude of loud speaker in the different operatic tunes, and the preferable cavity volume of speaker operation can be realized with the volume of very little.
This cavity volume be it is adjustable, theoretically can with the operatic tunes volume of equivalent infinity, and the physical size of cavity do not have to hair
Changing.Also, this coupling operatic tunes has very high radiation efficiency in low-frequency range.In addition, raising one's voice by adjusting the different operatic tunes
Device operating frequency range can obtain very high low-frequency sound pressure or ensure to reduce distortion while low frequency extension, reach substantially
The low-frequency effect of product speaker.
It should be noted that in the present specification, term " comprising ", "comprising" or its any other variant are intended to
Non-exclusive inclusion, so that process, method, article or equipment including a series of elements not only will including those
Element, but also including other elements that are not explicitly listed or further include as this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence " including ... ", it is not excluded that including
Also there are other identical elements in the process of the element, method, article or equipment.
Finally, it is to be noted that, a series of above-mentioned processing are not only included with sequence described here in temporal sequence
The processing of execution, and the processing including performing parallel or respectively rather than in chronological order.
Through the above description of the embodiments, those skilled in the art can be understood that the disclosure can be by
Software adds the mode of required hardware platform to realize, naturally it is also possible to all be implemented by software.Based on such understanding,
The technical solution of the disclosure can be embodied in the form of software product in whole or in part to what background technology contributed,
The computer software product can be stored in storage medium, such as ROM/RAM, magnetic disc, CD, including some instructions making
Computer equipment (can be personal computer, server or the network equipment etc.) performs each embodiment of the disclosure
Or the method described in certain parts of embodiment.
The disclosure is described in detail above, used herein principle and embodiment party of the specific case to the disclosure
Formula is expounded, and the explanation of above example is only intended to help to understand disclosed method and its core concept；It is meanwhile right
In those of ordinary skill in the art, according to the thought of the disclosure, change is had in specific embodiments and applications
Part, in conclusion the content of the present specification should not be construed as the limitation to the disclosure.
Claims (10)
1. a kind of speaker, including：
First cavity；
Second cavity is separated by a partition board and first cavity；
First loud speaker, in first cavity, wherein being provided with the first opening on the partition board, and described first raises one's voice
Device is set by the described first opening towards second cavity；
Second loud speaker, in second cavity, wherein the outer wall of second cavity is provided with the second opening, described
Two loud speakers are set outside by the described second opening towards second cavity；And
Controller, for first loud speaker and second loud speaker to be controlled to be worked at the same time according to predetermined way so that institute
The effective acoustic volume for stating the second cavity is more than its physical size.
2. speaker according to claim 1, wherein the controller is configured to：When first loud speaker and
When second loud speaker works at the same time, the difference of vibration between first loud speaker and second loud speaker is adjusted so that
First vibrating diaphragm of first loud speaker and the second vibrating diaphragm same-phase of second loud speaker are vibrated, and first vibrating diaphragm
Amplitude is less than the amplitude of second vibrating diaphragm.
3. speaker according to claim 1, wherein the Helmholz resonance frequency and described second in first cavity
The difference of Helmholz resonance frequency in cavity is less than predetermined threshold.
4. speaker according to claim 1, wherein being provided with third opening and/or institute on the outer wall of first cavity
It states and the 4th opening is provided on the outer wall of the second cavity,
Wherein, the speaker further comprises：
First paraphase radiation component is set by third opening towards outside first cavity, for by first chamber
The external world is transmitted to after the sound wave paraphase of internal radiation, extraneous sound wave is radiated to by first loud speaker to enhance；And/or
Second paraphase radiation component is set by the described 4th opening towards outside second cavity, for by second chamber
The external world is transmitted to after the sound wave paraphase of internal radiation, extraneous sound wave is radiated to by second loud speaker to enhance.
5. speaker according to claim 1, wherein the controller is configured to：
First loud speaker is controlled to work in low-frequency range, and second loud speaker is controlled to work in Whole frequency band.
6. speaker according to claim 1, wherein low-frequency range is divided into the first frequency range and the second frequency range, and described first
Frequency range is less than second frequency range,
Also, the controller is configured to：
In first frequency range, first loud speaker and second loud speaker is controlled to work at the same time；
In second frequency range, first speaker operation is controlled, and second loud speaker is controlled not work；
Other frequency ranges except the low-frequency range control first loud speaker not work, and control second loud speaker
Work.
7. a kind of control method, applied to a speaker, the speaker includes：First cavity；Second cavity passes through a partition board and institute
State the separation of the first cavity；First loud speaker, in first cavity, wherein the first opening is provided on the partition board, and
First loud speaker is set by the described first opening towards second cavity；In second cavity, wherein institute
The outer wall for stating the second cavity is provided with the second opening, and second loud speaker is open by described second towards second cavity
Outer setting, the control method include：
First loud speaker and second loud speaker is controlled to be worked at the same time according to predetermined way so that second cavity
Effective acoustic volume is more than its physical size.
8. according to the method described in claim 7, first loud speaker and second loud speaker are wherein controlled according to predetermined
Mode works at the same time so that effective acoustic volume of second cavity further comprises more than the step of its physical size：
When first loud speaker and second loud speaker work at the same time, adjust first loud speaker and raised with described second
Difference of vibration between sound device so that the second vibrating diaphragm same-phase of the first vibrating diaphragm of first loud speaker and second loud speaker
Vibration, and the amplitude of first vibrating diaphragm is less than the amplitude of second vibrating diaphragm.
9. according to the method described in claim 7, further comprise：
First loud speaker is controlled to work in low-frequency range, and second loud speaker is controlled to work in Whole frequency band.
10. according to the method described in claim 7, low-frequency range is wherein divided into the first frequency range and the second frequency range, and described
One frequency range is less than second frequency range,
Also, the control method further comprises：
In first frequency range, first loud speaker and second loud speaker is controlled to work at the same time；
In second frequency range, first speaker operation is controlled, and second loud speaker is controlled not work；
Other frequency ranges except the low-frequency range control first loud speaker not work, and control second loud speaker
Work.
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|---|---|---|---|
| CN201711477718.XA CN108200512B (en) | 2017-12-29 | 2017-12-29 | Sound box and control method thereof |
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|---|---|---|---|
| CN201711477718.XA CN108200512B (en) | 2017-12-29 | 2017-12-29 | Sound box and control method thereof |
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| CN108200512B CN108200512B (en) | 2023-12-22 |
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| CN108200512B (en) | 2023-12-22 |
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