CN106028238B - Double-monomer loudspeaker module, design method thereof and electronic equipment - Google Patents
Double-monomer loudspeaker module, design method thereof and electronic equipment Download PDFInfo
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- CN106028238B CN106028238B CN201610533005.XA CN201610533005A CN106028238B CN 106028238 B CN106028238 B CN 106028238B CN 201610533005 A CN201610533005 A CN 201610533005A CN 106028238 B CN106028238 B CN 106028238B
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- 230000035945 sensitivity Effects 0.000 abstract description 13
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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
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
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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
- H04R1/24—Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges
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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
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
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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
- H04R2400/00—Loudspeakers
- H04R2400/11—Aspects regarding the frame of loudspeaker transducers
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- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
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- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
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Abstract
The invention discloses a double-monomer loudspeaker module, a design method thereof and electronic equipment, wherein the module comprises a module shell, a retaining wall and two same loudspeaker monomers; the module shell is provided with two mounting positions which are in one-to-one correspondence with the two loudspeaker single bodies, two front cavities which are in one-to-one correspondence with the two loudspeaker single bodies and are mutually isolated, and a total rear cavity; the retaining wall is fixedly installed in the total rear cavity, so that the total rear cavity is divided into a first rear cavity and a second rear cavity which respectively correspond to the two loudspeaker units, wherein the volume of the first rear cavity is larger than that of the second rear cavity, and the difference between two resonant frequencies of the double-unit loudspeaker module is 30 Hz-100 Hz due to the volume difference between the first rear cavity and the second rear cavity. The module has higher sensitivity and lower resonant frequency.
Description
Technical Field
The invention relates to the technical field of electroacoustic products, in particular to a double-monomer loudspeaker module, a design method of the double-monomer loudspeaker module forming specific resonant frequency and electronic equipment provided with the double-monomer loudspeaker module.
Background
With the development of electronic products, the speaker module is gradually lighter, thinner and more compact, and also has higher requirements for the sensitivity, resonant frequency (F0), etc. of the speaker module, so that the conventional speaker module with a single speaker cannot meet the higher requirements for sound effect, for example, higher sensitivity and lower resonant frequency. To solve these problems, the concept of a two-monomer module is proposed, and therefore, how to design a two-monomer module to achieve a specific performance parameter to a desired target has become an important research subject.
Disclosure of Invention
One object of the present invention is to provide a new solution for obtaining a dual-cell module with a lower resonant frequency.
According to a first aspect of the present invention, there is provided a dual-unit speaker module, which comprises a module housing, a retaining wall and two identical speaker units; the module shell is provided with two mounting positions corresponding to the two loudspeaker single bodies one by one and a total rear cavity; the two loudspeaker single bodies are arranged on the installation positions corresponding to the two loudspeaker single bodies respectively; retaining wall fixed mounting be in the total back chamber, in order to incite somebody to action the total back chamber is cut apart into and is corresponded the first back chamber of first speaker monomer and correspond the second back chamber of second speaker monomer, wherein, the volume of first back chamber is greater than the volume of second back chamber, just first back chamber with the volume difference between the second back chamber makes the difference between two resonant frequency that two monomer speaker module appeared is between 30Hz to 100 Hz.
Optionally, the difference in volume between the first rear cavity and the second rear cavity is such that the difference between the two resonance frequencies of the twin mass loudspeaker module is between 50Hz and 80 Hz.
Optionally, the volume of the first rear cavity accounts for less than or equal to 60% of the total rear cavity volume.
Optionally, the retaining wall is adhesively secured in the general rear cavity.
Optionally, the retaining wall is made of sound absorbing material; or, the retaining wall comprises a plastic body and a sound-absorbing material bonded on the plastic body.
Optionally, the retaining wall extends upwardly from the bottom of the general rear chamber to a position adjacent to the two mounting positions so that the first rear chamber communicates with the second rear chamber on a side adjacent to the two mounting positions.
Optionally, the overall rear cavity has a mirror-symmetrical configuration about a mid-section between the two mounting locations.
Optionally, the retaining wall is arranged parallel to the middle section.
According to a second aspect of the present invention, there is provided a method for designing a dual-speaker module, comprising:
selecting two identical loudspeaker units;
selecting a module shell matched with the loudspeaker single bodies, wherein the module shell is provided with two mounting positions corresponding to the two loudspeaker single bodies one by one and a total rear cavity;
calculating the resonant frequency of the double-single-body loudspeaker module according to the total back cavity of the two loudspeaker single bodies, and taking the resonant frequency as a reference resonant frequency;
setting the first resonant frequency to be lower than the reference resonant frequency;
calculating the volume of a back cavity corresponding to the first resonance frequency to be obtained as a target volume according to the resonance frequency of the single loudspeaker;
removing the target volume from the total back volume to obtain a remaining volume;
calculating a second resonance frequency according to the resonance frequency of the loudspeaker monomer and the residual volume;
judging whether the difference value between the second resonant frequency and the first resonant frequency is between 30Hz and 100Hz, if so, determining that the first resonant frequency is the target resonant frequency, and if not, modifying the set first resonant frequency;
the retaining wall is installed in the total rear cavity, so that the total rear cavity is divided into a first rear cavity corresponding to a first loudspeaker monomer and a second rear cavity corresponding to a second loudspeaker monomer through the retaining wall, and the volume of the first rear cavity is equal to the target volume corresponding to the target resonant frequency.
According to a third aspect of the present invention, there is provided an electronic apparatus provided with the electronic apparatus according to the first aspect of the present invention.
The double-monomer loudspeaker module and the design method thereof have the beneficial effects that the total rear cavity of the module shell is divided unequally through the retaining wall, so that the module has two relatively close resonant frequencies (namely, impedance double peaks), and the resonant frequency of the module can be reduced and the medium-frequency sensitivity can be improved under the condition of not influencing the performance of the module.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic diagram of an internal structure of a dual-cell speaker module according to an embodiment of the present invention;
fig. 2 is an exploded schematic view of the dual-unit speaker module shown in fig. 1;
FIG. 3 is a schematic diagram of an internal structure of a reference module corresponding to the module shown in FIG. 1;
FIG. 4a is a graph of sensitivity versus frequency for the module of FIG. 3;
FIG. 4b is a graph showing the impedance-frequency variation of the module shown in FIG. 3;
FIG. 5a is a graph of sensitivity versus frequency for the module of FIG. 1;
FIG. 5b is a graph showing the impedance-frequency variation of the module shown in FIG. 1;
FIG. 6 is a flow chart of an embodiment of a method for designing a module according to the present invention.
Description of reference numerals:
1-a module housing; 1 a-a rear shell;
1 b-a front shell; 101a, 101 b-mounting position;
104-general rear cavity; 104 a-a first rear cavity;
104 b-a second rear cavity; 2a, 2 b-speaker monomer;
3-retaining wall.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 1 is a schematic structural diagram of an internal structure of a twin speaker module according to an embodiment of the present invention. Fig. 2 is an exploded view of the module shown in fig. 1.
Referring to fig. 1 and 2, the dual-unit speaker module of the present invention includes a module housing 1, a retaining wall 3, and two identical speaker units 2a and 2 b.
The module case 1 is provided with a mounting position 101a corresponding to the speaker unit 2a, a mounting position 101b corresponding to the speaker unit 2b, and a general rear chamber 104.
The speaker unit 2a is mounted at the corresponding mounting position 101a, and the speaker unit 2b is mounted at the corresponding mounting position 101 b.
The retaining wall 3 is fixedly installed in the overall rear cavity 104 to divide the overall rear cavity 104 into a first rear cavity 104a corresponding to the first speaker unit 2a and a second rear cavity 104b corresponding to the second speaker unit 2b, wherein the volume of the first rear cavity 104a is larger than the volume 104b of the second rear cavity, and the difference in volume between the first rear cavity 104a and the second rear cavity 104b is such that the twin speaker module has two resonance frequencies, and the difference between the two resonance frequencies is between 30Hz and 100Hz (including 30Hz and 100Hz), and the difference can be further limited between 50Hz and 80Hz (including 50Hz and 80Hz), which is the frequency corresponding to the maximum value of the low-band impedance.
This shows that the resonant frequencies of the first single module and the second single module constituting the dual-single speaker module are different, and the difference between the resonant frequencies is 30Hz to 100Hz, wherein the first single module is composed of the first speaker 2a (having an independent front cavity) and the first rear cavity 104a, and the second single module is composed of the second speaker 2b (having an independent front cavity) and the second rear cavity 104 b.
Resonance frequency F of single module0The calculation formula of (2) is as follows:
wherein, FsForming the resonance frequency of the loudspeaker monomer of the monomer module; vb is the back cavity volume of the monomer module; rho0For the air density, 1.21Kg/m is usually taken3(ii) a Sd is the effective radiation area (m) of the loudspeaker unit forming the unit module2) (ii) a C is the sound velocity in air, usually 344 m/s; mms is the equivalent mass of the vibration system; cms is the equivalent compliance of the support system of the vibration system.
It can be seen that the resonant frequency F of the single module can be determined according to the formula (1) and the formula (2)0Back volume Vb and resonance frequency F of the loudspeaker unitsThe relationship between the three, and then under the condition that the total volume of rear cavity 104 is certain, can obtain the volume of first rear cavity 104a and second rear cavity 104b to make the difference of two resonant frequencies of two monomer speaker modules between 30Hz to 100 Hz.
If the retaining wall 3 is removed on the basis of the twin speaker module of the present invention, the total rear cavity 104 will be virtually divided into a rear cavity region corresponding to the first speaker unit 2a and a rear cavity region corresponding to the second speaker unit 2b according to the installation position 101a and the installation position 101b, wherein the installation position 101a and the installation position 101b are generally mirror images of the virtual plane where the division is performed, and herein, the twin speaker module with the retaining wall 3 removed is referred to as a reference module, and fig. 3 shows an internal structure schematic diagram of the reference module. If the total back volume 104 is mirror-symmetrical or nearly mirror-symmetrical about the virtual plane, the resonant frequencies of the first and second individual modules of the reference module will be equal, which means that the resonant frequency of the reference module will be equal to the resonant frequencies of the two individual modules of itself.
For the dual-unit speaker module of the present invention, since the total rear cavity 104 is divided into the first rear cavity 104a and the second rear cavity 104b by the retaining wall 3, and the volume of the first rear cavity 104a is greater than the volume of the second rear cavity 104b, in the case of the same speaker unit, since the volume of the rear cavity of the first unit module of the present invention is greater than the volume of the rear cavity of the first unit module of the reference module, the resonant frequency of the former will be lower than the resonant frequency of the latter, and similarly, since the volume of the rear cavity of the second unit module of the present invention is less than the volume of the rear cavity of the second unit module of the reference module, the resonant frequency of the former will be higher than the resonant frequency of the latter, which means that the module of the present invention will have two resonant frequencies, i.e. there are two impedance peaks.
Figure 4a is a graph of the sensitivity of the above-mentioned reference module (averaging the total back volume) as a function of frequency. As can be seen from FIG. 4a, the average of the sensitivities 1-2KHz is 98.1 dB.
FIG. 5a is a graph of sensitivity versus frequency for the module of the present invention. As can be seen from FIG. 5a, the average of the sensitivities 1-2KHz is improved to 99.5dB, which is improved by 1.4 dB.
Fig. 4b is a graph of the impedance of the reference module (averaging the total back volume) as a function of frequency. As can be seen from FIG. 4b, the resonant frequency of the reference module is 610 Hz.
FIG. 5b is a graph of the impedance of the module of the present invention as a function of frequency. As can be seen from FIG. 5b, the resonant frequency of the inventive module is 530Hz, which is reduced by 80 Hz.
As can be seen from fig. 4a, 4b, 5a and 5b, the present invention utilizes dual impedance peaks to reduce the resonant frequency of the module, improve the if sensitivity of the module, and effectively ensure the performance of the module by overlapping two resonant frequencies close to each other. In addition, compared with a reference module with the same size, the module improves the medium-frequency sensitivity, so that the invention avoids enlarging the size of a single body due to insufficient sensitivity, not only saves the internal space of the module, but also can meet the requirement of smaller and thinner module size.
In order to facilitate the limit of the proximity of the resonant frequencies of the first single module and the second single module of the present invention, in one embodiment of the present invention, the volume of the first rear cavity 104a may be less than or equal to 60% of the total volume of the rear cavity 104 by the retaining wall 3.
In one embodiment of the present invention, the retaining wall 3 is adhesively secured in the general rear cavity 104. In other embodiments of the present invention, the retaining wall 3 may be fixedly connected to the rear cavity by ultrasonic welding or the like.
In one embodiment of the invention, the retaining wall 3 has a sound-absorbing material composition to also enable the sound quality to be adjusted by the retaining wall 3. The retaining wall 3 may have sound-absorbing material components, such as the retaining wall 3 is made of sound-absorbing material, or the retaining wall includes a plastic body and sound-absorbing material adhered to the plastic body. The sound-absorbing material.
Sound absorbing material is defined according to its standard as being sound absorbing material by classifying as sound absorbing material a material having an average sound absorption coefficient greater than 0.2 for four frequencies 250, 500, 1K, 2K. The sound absorbing material is mostly loose and porous material, such as slag wool, foam, silica, zeolite, sound absorbing cotton, and the like. The sound absorption mechanism of the sound absorption material is that sound waves go deep into pores of the material, the pores are mostly open pores with mutually communicated inner parts, and under the action of air molecule friction and viscous resistance, fine fibers are subjected to mechanical vibration, so that sound energy is converted into heat energy. The sound absorption coefficient of the porous sound absorption material generally increases gradually from low frequency to high frequency, so that the sound absorption effect on high frequency and medium frequency sound is better.
In one embodiment of the present invention, referring to fig. 1 and 2, the retaining wall 3 extends upward from the bottom of the general rear cavity 104 to a position adjacent to the two mounting positions 101a, 101b, which means that the retaining wall 3 will leave a gap between the surfaces of the two speaker units 2a, 2b facing the rear cavity 104, so that the first rear cavity 104a communicates with the second rear cavity 104b on the side adjacent to the two mounting positions 101a, 101b, and this structure enables the two rear cavities 104a, 104b to share the damping hole of the general rear cavity 104.
In a particular embodiment of the invention, the general rear cavity has a mirror-symmetrical configuration with respect to a median section (see the virtual plane of the reference module) between the two mounting positions, which is introduced in order to define the configuration of the general rear cavity, which is a virtual plane that is not visible. On this basis, in one embodiment of the invention, the retaining wall 3 is arranged parallel to the median section.
In order to facilitate mounting of the loudspeaker units 2a, 2b, in one embodiment of the invention, see fig. 2, the module housing 1 comprises a rear shell 1a and a front shell 1b, wherein the two mounting locations 2a, 2b are formed on the front shell 1b, and the rear shell 1a and the front shell 1b are snapped together to form an overall rear cavity 104. The rear case 1a and the front case 1b may be fastened together by ultrasonic welding or the like. On this basis, the retaining wall 3 may be provided on the front case 1 b.
The invention also provides an electronic device, such as a mobile phone, a tablet computer, an MP4, etc., which is provided with the dual-cell speaker module according to the invention.
The invention also provides a design method of the double-monomer loudspeaker module, and a flow chart of one embodiment of the design method is shown in FIG. 6.
According to fig. 6, the design method comprises:
in step S601, two identical speaker units are selected, which means that the two selected speaker units have the same resonance frequency, and then step S602 is performed.
Step S602, selecting a module housing matched with the speaker units, wherein the module housing has two mounting positions corresponding to the two speaker units one by one, two front cavities corresponding to the two speaker units one by one and isolated from each other, and a total rear cavity, and then executing step S603.
Step S603, calculating the resonant frequency of the two-unit speaker module according to the equation (1) and the equation (2) and the total rear cavity of the two speaker units, as the reference resonant frequency, and then executing step S604.
In step S604, the first resonant frequency is set to be lower than the reference resonant frequency, and then step S605 is performed.
In step S605, the back cavity volume corresponding to the first resonance frequency to be obtained is calculated as the target volume according to the above formula (1) and formula (2) based on the resonance frequency of the speaker unit, and then step S606 is performed.
In step S606, the target volume is removed from the total back volume to obtain a remaining volume, and then step S607 is executed.
Step S607, the second resonance frequency is calculated using the formula (1) and the formula (2) according to the resonance frequency and the remaining volume of the speaker unit, and then step S608 is performed.
Step S608, determining whether the difference between the second resonant frequency and the first resonant frequency is between 30Hz and 100Hz, if yes, performing step S609, otherwise, returning to step S604 to modify the set first resonant frequency.
In step S609, the first resonant frequency is determined as the target resonant frequency, and then step S410 is performed.
Step S610, a retaining wall is installed in the total rear cavity to divide the total rear cavity into a first rear cavity corresponding to the first speaker unit and a second rear cavity corresponding to the second speaker unit through the retaining wall, and a volume of the first rear cavity is equal to a target volume corresponding to the target resonant frequency.
In order to be able to quickly determine the position of the retaining wall, in one embodiment of the present invention, the resonant frequency expected to be obtained may be first set as the first resonant frequency in step S604, and if the first resonant frequency set first satisfies the condition as the target resonant frequency, the position of the retaining wall may be determined; if the first resonance frequency set first does not satisfy the condition as the target resonance frequency, the fixed frequency is increased again by a set step, for example, 5-10Hz, to modify the set first resonance frequency until the modified first resonance frequency satisfies the condition as the target resonance frequency, so that the resonance frequency of the designed module is as close as possible to the intended target.
In one embodiment of the invention, the general rear chamber has a mirror-symmetrical configuration about a mid-section between the two mounting locations, and the retaining wall is disposed in a direction parallel to the mid-section.
The embodiments in the present description are described in a progressive manner, and the same and similar parts among the embodiments can be referred to each other, each embodiment focuses on the differences from other embodiments, and the embodiments can be used alone or in combination with each other as needed.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (10)
1. A double-single-body loudspeaker module is characterized by comprising a module shell (1), a retaining wall (3) and two identical loudspeaker single bodies (2 a and 2 b); the module housing (1) is provided with two mounting positions (101 a, 101 b) corresponding to the two loudspeaker single bodies (2 a, 2 b) one by one and a total rear cavity (104); the module shell (1) comprises a rear shell (1 a) and a front shell (1 b); the two speaker units (2 a, 2 b) are mounted at respective corresponding mounting positions (101 a, 101 b); the retaining wall (3) is fixedly installed in the total rear cavity (104) so as to divide the total rear cavity (104) into a first rear cavity (104 a) corresponding to the first loudspeaker single body (2 a) and a second rear cavity (104 b) corresponding to the second loudspeaker single body (2 b), wherein the volume of the first rear cavity (104 a) is larger than that of the second rear cavity (104 b), and the difference between the volumes of the first rear cavity (104 a) and the second rear cavity (104 b) enables the difference between two resonant frequencies of the dual-body loudspeaker module to be within 30Hz to 100 Hz.
2. The twin mass loudspeaker module of claim 1 wherein the difference in volume between the first back volume (104 a) and the second back volume (104 b) is such that the difference between the two resonant frequencies at which the twin mass loudspeaker module occurs is within 50Hz to 80 Hz.
3. A twin mass loudspeaker module as claimed in claim 1 in which the volume of the first rear chamber (104 a) is less than or equal to 60% of the total rear chamber volume.
4. A twin mass loudspeaker module as claimed in claim 1 in which the retaining wall (3) is adhesively secured in the general rear cavity.
5. A twin-block loudspeaker module as claimed in claim 1, characterised in that the retaining wall (3) is made of sound absorbing material; or, the retaining wall (3) comprises a plastic body and a sound-absorbing material bonded on the plastic body.
6. A twin mass loudspeaker module as claimed in claim 1 in which the dam (3) extends upwardly from the base of the general rear chamber (104) to a position which terminates adjacent the two mounting locations (101 a, 101 b) so that the first rear chamber (104 a) communicates with the second rear chamber (104 b) on a side adjacent the two mounting locations (101 a, 101 b).
7. A twin mass loudspeaker module as claimed in any one of claims 1 to 6 characterised in that the general rear chamber (104) has a mirror symmetrical configuration about a mid-section between the two mounting locations (101 a, 101 b).
8. A twin mass loudspeaker module as claimed in claim 7 in which the retaining wall (3) is disposed parallel to the mid-section.
9. A design method of a double-monomer loudspeaker module is characterized by comprising the following steps:
selecting two identical loudspeaker units (2 a, 2 b);
selecting a module shell (1) matched with the loudspeaker single bodies (2 a, 2 b), wherein the module shell (1) is provided with two installation positions (101 a, 101 b) corresponding to the two loudspeaker single bodies (2 a, 2 b) one by one and a total rear cavity (104);
the resonance frequency of the double-single-body loudspeaker module is calculated by equally dividing the total rear cavity (104) according to the two loudspeaker single bodies (2 a and 2 b) and is used as a reference resonance frequency;
setting the first resonant frequency to be lower than the reference resonant frequency;
according to the resonance frequency of the loudspeaker single bodies (2 a and 2 b), calculating the volume of a back cavity corresponding to the first resonance frequency to be obtained as a target volume;
removing the target volume from the total back volume (104) resulting in a residual volume;
calculating a second resonance frequency from the resonance frequency of the speaker unit (2 a, 2 b) and the residual volume;
judging whether the difference value between the second resonant frequency and the first resonant frequency is within 30Hz to 100Hz, if so, determining the first resonant frequency as a target resonant frequency, and if not, modifying the set first resonant frequency;
installing a retaining wall (3) in the total rear cavity to divide the total rear cavity (104) into a first rear cavity (104 a) corresponding to a first speaker unit (2 a) and a second rear cavity (104 b) corresponding to a second speaker unit (2 b) through the retaining wall (3), and the volume of the first rear cavity (104 a) is equal to the target volume corresponding to the target resonance frequency.
10. An electronic device, characterized in that a twin speaker module according to any one of claims 1 to 8 is provided.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610533005.XA CN106028238B (en) | 2016-07-07 | 2016-07-07 | Double-monomer loudspeaker module, design method thereof and electronic equipment |
| PCT/CN2016/110427 WO2018006552A1 (en) | 2016-07-07 | 2016-12-16 | Double-speaker unit module and design method thereof, and electronic device |
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| CN201610533005.XA CN106028238B (en) | 2016-07-07 | 2016-07-07 | Double-monomer loudspeaker module, design method thereof and electronic equipment |
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| CN106028238A CN106028238A (en) | 2016-10-12 |
| CN106028238B true CN106028238B (en) | 2021-05-18 |
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| CN106028238B (en) * | 2016-07-07 | 2021-05-18 | 歌尔股份有限公司 | Double-monomer loudspeaker module, design method thereof and electronic equipment |
| CN111432312A (en) * | 2019-01-09 | 2020-07-17 | 台湾立讯精密有限公司 | Thin speaker device |
| JP7410974B2 (en) * | 2019-05-31 | 2024-01-10 | ハーマン インターナショナル インダストリーズ インコーポレイテッド | Speaker adapter and dual core speaker assembly |
| CN111756903B (en) * | 2020-07-01 | 2022-05-20 | 维沃移动通信有限公司 | Speaker assembly and electronic device |
| CN112929769B (en) * | 2021-01-27 | 2022-06-28 | 歌尔科技有限公司 | Audio equipment and intelligent wearable equipment |
| CN113490109B (en) * | 2021-07-06 | 2024-06-25 | 维沃移动通信有限公司 | Acoustic module and electronic equipment |
| CN113938802A (en) * | 2021-09-07 | 2022-01-14 | 联想(北京)有限公司 | Loudspeaker assembly and electronic equipment |
| CN114007179B (en) * | 2021-09-24 | 2024-10-18 | 歌尔科技有限公司 | Speaker module, electronic equipment and far-field noise elimination adjusting method |
| CN113993031B (en) * | 2021-11-10 | 2023-07-14 | 歌尔科技有限公司 | Sound generating device, calibration method of sound generating device and sound generating unit |
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| WO2018006552A1 (en) | 2018-01-11 |
| CN106028238A (en) | 2016-10-12 |
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