CN115643333A - Loudspeaker assembly and mobile terminal - Google Patents
Loudspeaker assembly and mobile terminal Download PDFInfo
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- CN115643333A CN115643333A CN202110814765.9A CN202110814765A CN115643333A CN 115643333 A CN115643333 A CN 115643333A CN 202110814765 A CN202110814765 A CN 202110814765A CN 115643333 A CN115643333 A CN 115643333A
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Abstract
The disclosure relates to a loudspeaker assembly and a mobile terminal, wherein the loudspeaker assembly is applied to the mobile terminal and comprises a sound absorption device, the sound absorption device comprises a sound absorption part with a cavity structure, and a sound absorption material is filled in a cavity of the sound absorption part; the proportional relation between the dimension of the sound-absorbing component and the filling amount of the sound-absorbing material satisfies that the sound-absorbing component absorbs sound according to the specified sound-absorbing frequency. When a specified sound absorbing frequency needs to be absorbed, the size of the sound absorbing member can be changed by changing the filling amount of the sound absorbing material filled in the sound absorbing member of the sound absorbing device. Therefore, different mobile terminals can adjust the size of the sound-absorbing part according to the stacking condition inside the mobile terminal under the condition of meeting the requirement of absorbing the specified sound-absorbing frequency.
Description
Technical Field
The present disclosure relates to the field of acoustics, and more particularly, to a speaker assembly and a mobile terminal.
Background
Mobile terminals such as mobile phones and computers have become an indispensable part in daily life of people, and with the development of science and technology, the functions of the mobile terminals are more and more increased and more perfect. Users want to realize the two-channel stereo sound quality in a full-screen mobile phone, so a front cavity needs to be designed in the mobile phone to guide the sound to the narrow slit of the screen for sound output. The design can cause the resonance peak of sound with certain frequency, which brings bad influence to the sound effect and influences the user experience.
Disclosure of Invention
To overcome the problems in the related art, the present disclosure provides a speaker assembly and a mobile terminal.
According to a first aspect of the embodiments of the present disclosure, there is provided a speaker assembly applied to a mobile terminal, the speaker assembly including a sound absorption device, the sound absorption device including a sound absorption member having a cavity structure, a cavity of the sound absorption member being filled with a sound absorption material; the proportional relation between the dimension of the sound-absorbing component and the filling amount of the sound-absorbing material satisfies that the sound-absorbing component absorbs sound according to the specified sound-absorbing frequency.
In some embodiments, the sound absorbing member comprises a plurality of sound absorbing ducts of different lengths; the size of each sound-absorbing pipeline, the filling amount of sound-absorbing materials filled in each sound-absorbing pipeline and the sound-absorbing frequency of each sound-absorbing pipeline have a first relation;
the first relationship is:
wherein, the f p A sound absorption frequency for each of the first sound absorption ducts; the n is a high-order resonance order of each first sound-absorbing pipeline; said L is p For each length of the first sound-absorbing duct; d is the diameter of each first sound-absorbing duct; v is p A sound speed determined based on a filling amount of the sound-absorbing material filled in each of the first sound-absorbing ducts.
In some embodiments, the specified sound absorption frequency further comprises a plurality of sound absorption frequencies corresponding to a plurality of the first sound absorption pipes; the sound absorption frequencies of a plurality of the first sound absorption pipes satisfy a model relationship determined based on a finite element method and thermal viscous acoustics using porous material acoustics.
In some embodiments, the sound-absorbing member includes a plurality of second sound-absorbing pipes having the same or different lengths and a plurality of sound-absorbing chambers having the same or different volumes, each of the second sound-absorbing pipes forming a helmholtz resonator with the corresponding sound-absorbing chamber; a second relation exists among the size of the Helmholtz resonator, the filling amount of the sound absorption material filled in the Helmholtz resonator and the sound absorption frequency of the Helmholtz resonator;
the second relation is as follows:
wherein, the f H The sound absorption frequency of the Helmholtz resonator; the S is the opening area of the second sound-absorbing pipeline; the V is the volume of the sound absorbing cavity; l is the length of the second sound-absorbing duct; v is H A sound speed determined based on a filling amount of the sound-absorbing material filled in the Helmholtz resonator.
In some embodiments, the specified sound absorption frequency further comprises a sound absorption frequency of the helmholtz resonator; the sound absorption frequencies of the Helmholtz resonators meet the model relation determined by using porous material acoustics based on a finite element method and thermal viscous acoustics.
In some embodiments, the speaker assembly further comprises a front cavity; the specified sound absorption frequency is determined based on a high-frequency resonance peak frequency value of the front cavity, and the high-frequency resonance peak frequency value is determined by simulation based on the shape and the size of the front cavity.
In some embodiments, the specified sound absorption frequency is in a frequency range determined based on the high frequency resonant peak frequency value.
In some embodiments, the sound absorption frequencies corresponding to a plurality of the first sound absorption pipelines form one or more sound absorption frequency bands, and each sound absorption frequency band comprises one or more sound absorption frequencies corresponding to the first sound absorption pipelines; and each sound absorbing frequency band corresponds to a plurality of sound absorbing frequencies uniformly arranged in the first sound absorbing pipelines.
According to a second aspect of embodiments of the present disclosure, there is provided a mobile terminal comprising the speaker assembly of the first aspect.
In some embodiments, the sound absorbing device is disposed in a gap between a rear case and a middle frame in the mobile terminal.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: the dimension of the sound absorbing component with the cavity structure in the sound absorbing device has a proportional relation with the sound absorbing material filled in the cavity of the sound absorbing component, and the proportional relation satisfies that the sound absorbing component absorbs sound according to the appointed sound absorbing frequency. Therefore, when a predetermined sound absorbing frequency needs to be absorbed, the size of the sound absorbing member can be changed by changing the amount of the sound absorbing material filled in the sound absorbing member of the sound absorbing device. Therefore, different mobile terminals can adjust the size of the cavity structure of the sound absorption component according to the stacking condition inside the mobile terminal under the condition of meeting the requirement of absorbing the specified sound absorption frequency.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a schematic diagram of a speaker assembly shown in accordance with an exemplary embodiment.
Fig. 2 is a schematic diagram of a speaker assembly according to another exemplary embodiment.
Fig. 3 is a diagram illustrating a mobile terminal according to an example embodiment.
Fig. 4 is a sound graph of a mobile terminal according to an example embodiment.
Fig. 5 is a graph comparing the design and results of sound absorption coefficient of sound-absorbing member according to an exemplary embodiment.
Fig. 6 is a flow diagram illustrating the operation of an audio processing circuit of a handset in accordance with an exemplary embodiment.
Fig. 7 illustrates the operation of a speaker circuit according to an exemplary embodiment.
Fig. 8 is a schematic diagram of a handset circuit board, according to an example embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the disclosure, as detailed in the appended claims.
Fig. 3 is a diagram illustrating a mobile terminal according to an example embodiment. The mobile terminal 40 may be an electronic product with a speaker, such as a mobile phone, a computer, a telephone watch, and the like.
The mobile terminal 40 may include: a housing 41 and a speaker assembly. The speaker assembly is disposed inside the housing 41. The housing 41 may be disposed on an outer layer of the mobile terminal 40, and the housing 41 may be made of a metal material. The housing 41 is provided with an opening corresponding to the speaker 10 for making the speaker 10 emit sound to the outside of the mobile terminal 40.
The sound is transmitted through a medium, the sound can be generated only by the vibration of an object, and the sound is the fluctuation generated by the vibration of the substance, namely sound wave, and the sound wave can be heard only by the transmission of the medium. The speed of sound waves transmitted in a medium is called sound speed (or sonic speed), the speed of sound in different media is different, and the speed of sound in air is 340m/s. The frequency is the number of times the sound wave of the sound completes periodic variation in unit time, and is a quantity describing the frequency of periodic movement, and different sounds are different in frequency.
A user hopes that the mobile terminal can have the two-channel stereo tone quality, and in a mobile phone with a full screen, a front cavity needs to be designed to guide the sound to a narrow slit of the screen for sound output. The design can cause the resonance peak of sound with certain frequency, which brings bad influence to the sound effect and influences the user experience.
To solve the above-described problems, the present disclosure provides an exemplary speaker assembly, as shown in fig. 1 and 2. As shown in fig. 1 and 2, the speaker assembly includes a speaker 10 and a sound-absorbing device 20. The speaker 10 is used to emit sound. The sound absorbing device 20 includes a sound absorbing member having a cavity structure, and a sound absorbing material is filled in the cavity of the sound absorbing member. The sound-absorbing material can be sound-absorbing foam, zeolite powder and the like. After filling the sound-absorbing material, according to the Biot porous material equivalent theory, the equivalent sound velocity of sound in the sound-absorbing member is reduced.
With the above configuration, when a specified sound absorbing frequency needs to be absorbed, the sound velocity of sound at the sound absorbing member is changed by changing the filling amount of the sound absorbing material filled at the sound absorbing member of the sound absorbing device 20, thereby changing the size of the sound absorbing member. Therefore, different mobile terminals 40 can adjust the size of the sound-absorbing member according to the stacking condition inside the mobile terminal 40 under the condition of absorbing the designated sound-absorbing frequency.
The proportional relation between the dimension of the sound-absorbing component and the filling amount of the sound-absorbing material satisfies that the sound-absorbing component absorbs sound according to the specified sound-absorbing frequency. The designated sound absorption frequency may be understood as one or more sound absorption frequency points in a sound absorption frequency band in which the sound absorbing device 20 is to absorb sound. The sound absorption frequency band may be a sound absorption frequency band range consisting of a plurality of different sound absorption frequency points.
The sound absorption frequency band may include designated sound absorption frequency points distributed as much as possible, so that the sound absorption device 20 can absorb sounds in different sound frequency bands, thereby preventing the sounds emitted by the speaker 10 from resonating with the housing of the mobile terminal 40, so as to achieve a better sound absorption effect, and enable a user to have a good user experience.
In some embodiments, speaker 10 includes a front volume 13 and sound vents 11.
In some embodiments, the specified sound absorption frequency is determined based on a high-frequency resonance peak frequency value of the front cavity 13, which is determined based on a simulation of the shape and size of the front cavity 13. In the mobile terminal 40 with different models, the stacking manner of the internal electronic components is different, so that the volume, shape and size of the front cavity 13 finally reserved for the speaker 10 are different.
Reference data such as the shape and size of the front cavity 13 are input into simulation software, so that a high-frequency resonant peak frequency value of the front cavity 13 is obtained. The specified sound-absorbing frequency of the sound-absorbing member in the sound-absorbing device 20 of the speaker 10 is determined from the high-frequency resonance peak frequency value of the front cavity 13. That is, if the shape and size of the front cavity 13 are different, the frequency value of the high-frequency resonance peak is different, and the sound absorption frequency is different.
In some embodiments, the specified sound absorption frequency is in a frequency range determined based on the high frequency formant frequency value. As can be seen from the above, the sound absorption frequency is specified as a sound absorption frequency band range composed of a plurality of different sound absorption frequency points. Therefore, the specified sound absorption frequency may be a sound absorption frequency within a frequency band formed by shifting the high-frequency resonance peak frequency value to the left and right sides of the high-frequency resonance peak frequency value as the center point.
Specifically, the specified sound absorption frequency may be a frequency band range value formed by shifting 1kHz each to the left and right of the high-frequency resonance peak frequency value with the high-frequency resonance peak frequency value as a center point. The absorption frequencies of the plurality of first sound-absorbing ducts 21 having different lengths are different, and the absorption frequencies of the plurality of first sound-absorbing ducts 21 collectively constitute a sound-absorbing range of 2kHz formed with the high-frequency resonance peak frequency value as the center, thereby ensuring that the sound frequency in the vicinity of the high-frequency resonance peak frequency value can be absorbed.
Further, as shown in fig. 4, the abscissa is the frequency (Hz) of sound, and the ordinate is decibel (dB) of sound; the frequency and decibel of sound from the front chamber 13 of the loudspeaker 10 were measured by acoustic simulation software based on the shape and size of the front chamber 13 of the loudspeaker 10, and a graph of the frequency of sound from the front chamber 13 was plotted. And determining the high-frequency resonant peak frequency value of the front cavity 13 according to the sound frequency curve graph and by using an acoustic simulation model.
As shown in fig. 4, the curve a is a frequency curve of the sound absorbing member without the sound absorbing material, and the curve b is a frequency curve of the sound absorbing member with the sound absorbing material. Wherein the highest value in the a curve is a high frequency resonance peak frequency value determined according to the shape and size of the front cavity 13.
In some embodiments, one end of the sound-absorbing device 20 is an open end, the open end of the sound-absorbing device 20 communicates with the sound-leaking hole 11 of the speaker 10, and the other end is a closed end. The sound emitted from the speaker 10 enters the first sound-absorbing duct 21 or the second sound-absorbing duct 23 and the sound-absorbing chamber 24 through the sound-releasing holes 11, and when the sound enters a closed cavity, the sound of a specific frequency is removed.
In the first embodiment, as shown in fig. 1, the sound-absorbing member in the sound-absorbing device 20 includes an air chamber 22 and a plurality of first sound-absorbing ducts 21 having different lengths.
In the second embodiment, the sound-absorbing member of the sound-absorbing device 20 includes an air chamber 22 and a plurality of second sound-absorbing ducts 23 of the same or different lengths and sound-absorbing chambers 24 of the same or different volume sizes.
Specifically, as shown in fig. 2, the sound-absorbing member of the sound-absorbing device 20 may include an air chamber 22, a plurality of second sound-absorbing ducts 23 having the same length, and sound-absorbing chambers 24 having different volume sizes. The sound-absorbing member of the sound-absorbing device 20 may include an air chamber 22, a plurality of second sound-absorbing ducts 23 having different lengths, and a sound-absorbing chamber 24 having the same volume. The sound-absorbing member of the sound-absorbing device 20 may include an air chamber 22, a plurality of second sound-absorbing ducts 23 having different lengths, and a sound-absorbing chamber 24 having different sizes.
From the above, the specified sound absorption frequency is determined from the high-frequency resonance peak frequency value. In the first embodiment, the specified sound-absorbing frequency includes the sum of the sound-absorbing frequencies of the plurality of first sound-absorbing ducts 21; in the second embodiment, the specified sound absorbing frequency includes the sum of the sound absorbing frequencies of the plurality of second sound absorbing ducts 23 and the plurality of sound absorbing cavities 24.
The sound-absorbing means 20 absorbs the sound of the frequency corresponding to the high frequency resonance peak frequency value emitted from the sound discharge hole 11, so that the one or more first sound-absorbing ducts 21 or the second sound-absorbing duct 23 and the sound-absorbing chamber 24 located in the rear chamber absorb the sound at the high frequency resonance peak frequency value, and the sound pressure level at the high frequency is compensated because of the energy conservation. Therefore, the occurrence of high-frequency resonance peaks can be avoided, the pronunciation effect of the loudspeaker 10 in the mobile terminal 40 is ensured, and good user experience is ensured.
In a first embodiment, as shown again in fig. 1, the sound-absorbing device 20 comprises a plurality of first sound-absorbing ducts 21 of different lengths and an air chamber 22; at this time, the designated sound absorption frequency includes a plurality of sound absorption frequencies corresponding to the plurality of first sound absorption ducts 21. The sound absorbing frequencies of the plurality of first sound absorbing pipes 21 different in length satisfy a model relationship determined by porous material acoustics based on a finite element method and thermal viscous acoustics.
Specifically, when the plurality of first sound-absorbing ducts 21 are connected to the air chamber 22, the sound-absorbing frequency point of each first sound-absorbing duct 21 is slightly shifted. The plurality of first sound absorbing ducts 21 may be modeled using a method of finite element analysis coupled with thermal visco-acoustic acoustics and using Biots cellular material acoustics.
In some embodiments, the sound absorbing frequencies corresponding to the plurality of first sound absorbing pipes 21 constitute one or more sound absorbing frequency bands, each sound absorbing frequency band including the sound absorbing frequency corresponding to one or more sound absorbing pipes; and, correspond a plurality of sound frequencies of a plurality of sound pipelines of inhaling that evenly set up in each sound frequency channel of inhaling.
Wherein, through setting up the first sound pipeline 21 of many different lengths for every first sound pipeline 21 absorbed frequency of inhaling is different. The sound absorption device 20 is used for absorbing sounds with different frequencies, so that the sounds at the rear part of the loudspeaker 10 can not cause the vibration of the rear shell of the mobile terminal 40, and a user has good user experience.
In the first embodiment, a sound absorbing material is filled in the first sound absorbing duct 21. There is a first relationship among the size of each first sound-absorbing duct 21, the amount of sound-absorbing material filled in each first sound-absorbing duct 21, and the sound-absorbing frequency of each first sound-absorbing duct 21. In some embodiments, the first relationship is:
wherein, f p The sound absorption frequency for each first sound absorption duct 21; n is the high order resonance order of each first sound-absorbing duct 21; l is a radical of an alcohol p For the length of each first sound-absorbing duct 21; d is the diameter of each first sound-absorbing duct 21; v. of p The sound speed determined based on the filling amount of the sound-absorbing material filled in each first sound-absorbing duct 21.
When the sound absorbing material is filled in the first sound absorbing duct 21, the sound velocity of the sound in the first sound absorbing duct 21 becomes low, i.e., v p And decreases. From the first relationship, the length L of the first sound absorbing duct 21 is p Without change, v p Is reduced so that the sound-absorbing frequency f of the first sound-absorbing duct 21 is reduced p It will be lowered.
If the sound absorption frequency f is specified p After the first sound absorbing duct 21 is filled with the sound absorbing material, v p The reduction is such that the length L of the first sound-absorbing duct 21 should be reduced p Or the diameter d of the first sound-absorbing duct 21. Therefore, by adding a sound-absorbing material inside the first sound-absorbing duct 21, the length or diameter of the first sound-absorbing duct 21 can be reduced.
Specifically, when the sound velocity in the first sound absorbing duct 21 is half of the original sound velocity in accordance with the filling amount of the sound absorbing material filled in the first sound absorbing duct 21, the length and the diameter of the first sound absorbing duct 21 can be half of the original length in the first relationship while maintaining the predetermined sound absorbing frequency. Therefore, the sound-absorbing member of the whole sound-absorbing device 20 is smaller and thinner, and can be installed in the mobile terminal 40 having a small internal space.
In addition, according to the first relation, the length L of the first sound absorbing duct 21 p The diameter d of the first sound-absorbing duct 21 is different and the sound-absorbing frequency f of the first sound-absorbing duct 21 is the same p It is different. Diameter of the first sound-absorbing duct 21The greater the sound absorption frequency f p The smaller; the smaller the diameter of the first sound-absorbing duct 21 is, the sound-absorbing frequency f p The larger.
It should be noted that the first relationship can be used for preliminary calculation and theoretical analysis. When the plurality of first sound-absorbing ducts 21 having different lengths are communicated with the air chamber 22, the sound-absorbing frequency points of the sound absorption of the respective first sound-absorbing ducts 21 are slightly shifted. At this time, the first sound absorbing duct 21 was modeled using a finite element analysis method in conjunction with thermal visco-acoustic properties using a Biots porous material acoustic theory.
In the second embodiment, as shown in fig. 2 again, the sound-absorbing device 20 includes a plurality of second sound-absorbing ducts 23 having the same length and a plurality of sound-absorbing chambers 24 having different volumes, and the number of the second sound-absorbing ducts 23 corresponds to the number of the sound-absorbing chambers 24. Each second sound-absorbing duct 23 corresponds to one sound-absorbing chamber 24. The sound-absorbing chamber 24 is located at an end of the second sound-absorbing duct 23 remote from the air chamber 22. The width of the sound-absorbing chamber 24 is greater than the width of the second sound-absorbing duct 23. At this time, the second sound-absorbing duct 23 and the sound-absorbing chamber 24 constitute a helmholtz resonator.
In the second embodiment, the sound-absorbing device 20 includes a plurality of helmholtz resonators; in this case, the predetermined sound absorption frequency includes a plurality of sound absorption frequencies corresponding to the plurality of helmholtz resonators. The sound absorption frequencies of the plurality of Helmholtz resonators satisfy a model relationship determined based on a finite element method and thermal viscous acoustics using porous material acoustics.
Specifically, after a plurality of helmholtz resonators are connected with the air cavity 22, the sound absorption frequency point of each helmholtz resonator may be shifted by a small amount. The multiple helmholtz resonators can be modeled using a method of finite element analysis coupled with thermal viscosity acoustics and using Biots porous material acoustics.
There is a second relationship between the size of the helmholtz resonator, the filling amount of the sound-absorbing material filled in the helmholtz resonator, and the sound-absorbing frequency of the helmholtz resonator. The second relation is as follows:
wherein, the f H The sound absorption frequency of the Helmholtz resonator; s is an opening area of the second sound-absorbing duct 23; v is the volume of the sound absorbing chamber 24; l is the length of the second sound-absorbing duct 23; v is H The sound velocity is determined based on the filling amount of the sound-absorbing material filled in the Helmholtz resonator.
After the sound absorbing material is filled in the second sound absorbing pipe 23 and the sound absorbing cavity 24, according to the Biot porous material equivalent theory, the equivalent sound velocity of sound in the helmholtz resonator is reduced, that is, the sound velocity v of sound in the helmholtz resonator is reduced H Becomes low. From the second relationship, when the length L of the second sound absorbing duct 23 is not changed or the volume V of the sound absorbing chamber 24 is not changed, V H Is reduced so that the sound-absorbing frequency f of the second sound-absorbing duct 23 is reduced H It will be lowered.
If the sound absorption frequency f is specified H In this case, the length L of the second sound-absorbing duct 23 or the volume V of the sound-absorbing cavity 24 can be reduced after the sound-absorbing material is filled in the second sound-absorbing duct 23 or the sound-absorbing cavity 24. Therefore, by adding the sound-absorbing material to the second sound-absorbing duct 23 or the sound-absorbing cavity 24, the length of the second sound-absorbing duct 23 or the volume of the sound-absorbing cavity 24 can be reduced, so that the sound-absorbing member of the entire sound-absorbing device 20 can be made smaller and thinner, and can be mounted in the mobile terminal 40 having a narrow internal space.
Further, in the second relationship, the sound absorption frequency of the helmholtz resonator can be calculated from the range of the specified absorption frequency, the opening area of the second sound absorbing duct 23, the average length of the second sound absorbing duct 23, the propagation speed of sound in the helmholtz resonator, and the volume of the sound absorption cavity 24. The overall volume of the helmholtz resonator is adjusted within a suitable range by adjusting the opening area of the second sound-absorbing duct 23, the length of the second sound-absorbing duct 23, or the volume of the sound-absorbing chamber 24 without changing the absorption frequency.
Further, the helmholtz resonator sound velocity is set to half of the original sound velocity by the filling amount of the sound absorbing material filled in the helmholtz resonator. In the second relation, one of the volume of the sound-absorbing chamber 24 or the length of the second sound-absorbing duct 23 may be reduced to one fourth of the original volume, or both the volume of the sound-absorbing chamber 24 and the length of the second sound-absorbing duct 23 may be reduced to one half of the original volume. Therefore, the sound absorbing member of the entire sound absorbing device 20 can be made smaller and thinner, and can be mounted in the mobile terminal 40 having a small internal space.
Further, as shown in fig. 5, a design and result comparison chart is shown for the sound absorption coefficient of the sound-absorbing member. In fig. 5, the ordinate represents the sound absorption coefficient, and the abscissa represents the frequency of sound. A sound absorption coefficient of 1 represents 100% absorption of sound at this frequency.
The first embodiment is described as an example, and the upper graph of fig. 5 shows a plurality of curves having different peak values. Wherein each peak represents a sound absorption frequency of one of the first sound absorption ducts 21. Since the sound-absorbing member has the plurality of first sound-absorbing ducts 21 having different lengths in the present embodiment, the lengths of the first sound-absorbing ducts 21 are different, and the sound-absorbing frequency is also different, each of the first sound-absorbing ducts 21 corresponds to one peak, and thus, a curve having a plurality of different peaks is shown in the upper graph of fig. 5.
In the lower graph of fig. 5, there is a curve composed of a plurality of sound absorbing frequency points. Each sound absorbing frequency point corresponds to one first sound absorbing pipeline 21. Appointed sound frequency point of inhaling is covered up as much as possible, a plurality of sound frequency points of inhaling that a plurality of first sound pipelines 21 that are about to in the mobile terminal 40 correspond set up in appointed sound frequency section as much as possible, so, a wide sound forbidden band of inhaling can be constituteed at the sound frequency point of inhaling of a plurality of narrow bands to reach better sound effect of inhaling.
For example, in a sound frequency band in the range of 300 to 1200Hz, the sound frequency band in the range of 300 to 1200Hz may be divided into one or more sound absorbing frequency bands, for example into three: 300-600 Hz, 600-900 Hz and 900-1200 Hz.
There is a corresponding sound absorption frequency for the one or more sound absorption ducts in each sound absorption frequency band. For example, in the frequency band of 300 to 600Hz, 30 first sound-absorbing ducts 21 may be provided; in the frequency range of 600 to 900Hz, 30 first sound absorbing ducts 21 may be provided, and in the frequency range of 900 to 1200Hz, 30 first sound absorbing ducts 21 may be provided. In addition, the corresponding plurality of first sound-absorbing ducts 21 in each sound-absorbing frequency band evenly distribute sound-absorbing frequency points in the sound-absorbing frequency band. For example, in the frequency band of 300 to 600Hz, there are 30 first sound-absorbing ducts 21; sound absorption frequency points corresponding to one first sound absorption pipe 21 are arranged every 10 Hz. And finally, modulating the frequency response curve of the loudspeaker through a sound absorption forbidden band.
As can be seen from the above, the sound absorption range of the designated absorption frequency can be adjusted and set according to the high-frequency resonant peak frequency value of the mobile terminal 40, and the sound absorption range of the designated absorption frequency can be determined. Through the first relation, the length or the diameter of the first sound-absorbing duct 21 is set, so that sound with different frequencies is absorbed, and the range of specified absorption frequency is met. Through the second relation, set up the different length of second sound pipeline 23, the different volume in sound-absorbing cavity 24 and the open area of second sound pipeline 23 of inhaling, realize the absorption to different frequency sound, satisfy appointed absorption frequency's scope.
In some embodiments, each of the first sound-absorbing ducts 21 is a hose, and is independently disposed inside the mobile terminal 40. Wherein, every first sound pipeline 21 of inhaling all is the hose, can buckle and coil in mobile terminal 40's inside, utilizes the inside all spaces that can utilize of mobile terminal 40, sets up the route of every first sound pipeline 21, and the occupation space of sound device 20 is inhaled in the dispersion, utilizes mobile terminal 40 inner space from the branch, and then has saved limited mobile terminal 40's inner space.
In this manner, the saved space may be used for placing a larger battery, which may increase the capacity of the battery, increase the standby time of the mobile terminal 40, and the like. The hose should be made of a polymer material with high acoustic impedance to avoid sound from being incident into the solid material.
In some embodiments, each first sound-absorbing duct 21 may also be made of a rigid pipe material. The rigid pipe is a hard pipe-mounted structure and is made of materials with certain rigidity. For example, the rigid tube may be made of metal, plastic, or other material having some degree of rigidity. The rigid material is processed into a rigid pipe with certain acoustic characteristics through a special processing technology. The rigid pipe can be in a straight cylinder shape or can be bent according to the internal structure of the mobile terminal.
In addition, it should be further noted that the embodiments disclosed in the present disclosure all belong to the acoustic metamaterial, and the acoustic metamaterial is prepared by performing artificial design on characteristic physical dimensions, so that the acoustic metamaterial has an artificial-sequence composite material exceeding the acoustic performance of the conventional material. Acoustic metamaterials typically manipulate acoustic waves by introducing structural designs, typically rigid boundaries, such as iron, aluminum, or 3D printed materials.
In the acoustic metamaterial, the metamaterial having the sound absorption function is called sound absorption metamaterial. The first sound-absorbing duct 21 in the first embodiment of the present disclosure, and the second sound-absorbing duct 23 and the sound-absorbing cavity 24 in the second embodiment of the present disclosure form a helmholtz resonator, which all fall into the category of the sound-absorbing metamaterial.
In some embodiments of the present disclosure, the sound absorbing device 20 includes an air cavity 22. The air chamber 22 is provided between the sound leakage hole 11 of the speaker 10 and the sound-absorbing member for coupling the sound leakage hole 11 of the speaker 10 and the sound-absorbing member. As shown in fig. 1 and 2, the air chamber 22 is provided with a plurality of connection holes, and the sound-absorbing member is communicated with the air chamber 22 through the connection holes. In this way, the sound entering the air chamber 22 through the sound outlet hole 11 does not go to other places, but enters the first sound-absorbing duct 21 or the second sound-absorbing duct 23.
In one embodiment, one end of the opening of each of the first sound-absorbing duct 21 or the second sound-absorbing duct 23 is detachably connected to the connection hole by inserting and pulling, thereby detachably connecting the first sound-absorbing duct 21 or the second sound-absorbing duct 23 to the air chamber 22. So, it is more convenient to make air chamber 22 and many first sound pipeline 21 or the second sound pipeline 23 between be connected, the installation and the dismantlement of being convenient for.
In one embodiment, a plurality of connection holes are provided on one or more sides of the air chamber 22. Air chamber 22 appearance is like a column, and parcel lou hole 11 after one end is opened, and side and the other end set up a plurality of connecting holes, and each face of air chamber 22 can all be provided with the connecting hole, can make first sound pipeline 21 or the second of inhaling inhale sound pipeline 23 and have abundant connecting space like this.
In one embodiment, the air chamber 22 may be a cone-shaped cylinder, and the cross-section of the end connected to the sound leakage hole 11 is larger than the cross-section of the end connected to the first sound-absorbing duct 21 or the second sound-absorbing duct 23. Thus, the sound coming out of the sound outlet hole 11 is collected, and the sound is further propagated in the direction of the first sound-absorbing duct 21 or the second sound-absorbing duct 23.
In some embodiments of the present disclosure, the speaker assembly includes a bracket 30, the bracket 30 is connected to the front end of the speaker 10, and forms a front chamber 13 at the sound outlet of the speaker 10. The bracket 30 is made of plastic material, which is light, low in price and convenient to obtain. Support 30 opens the effect of support and protection to speaker 10, and simultaneously, the plastic material has certain cushioning effect, if mobile terminal 40 takes place the vibration, support 30 can guarantee that speaker 10 is stable, reduces or avoids speaker 10 to rock, guarantees the pronunciation effect.
Another aspect of the present disclosure also provides a mobile terminal including the speaker assembly described above.
The mobile terminal 40 may be an electronic device such as a mobile phone, a computer, a telephone watch, and the like. For example, the mobile terminal 40 may be a cellular phone in which the mobile terminal 40 of the speaker assembly described above is installed. With the development of science and technology, mobile phones are increasingly light and thin, display screens are increasingly large, especially mobile phones with a front screen, available space inside the mobile phones is less and less, users expect that the mobile phones can have two-channel stereo tone quality, and in mobile phones with a full screen, a front cavity needs to be designed inside the mobile phones to guide sound to narrow slits of the screens to output sound. The design can cause the resonance peak of sound with certain frequency, which brings bad influence to the sound effect and influences the user experience.
For example, the mobile terminal 40 may be a telephone watch in which any of the above-described mobile terminals is installed. Along with the development of science and technology, the function of telephone wrist-watch is more and more powerful, can the video, can talk, can listen to the music, and the component that inside set up is also more and more, and the space that inside can utilize is less and less, and the user hopes that telephone wrist-watch can the stereophonic tone quality of dual track, need be at a telephone wrist-watch internal design front chamber, lead the slit sound of the screen of telephone wrist-watch with sound.
According to some embodiments of the present disclosure, a speaker, also called a loudspeaker, converts electrical energy into an electroacoustic device of sound energy, which may be used in a mobile terminal or other electronic devices to support the mobile terminal or other electronic devices to implement an audio output function. The principle of the speaker is that current passes through a coil in a magnetic circuit composed of magnets, and a driving force is generated in the up-and-down direction to vibrate a vibrating body, so that air is vibrated to produce sound.
According to some embodiments of the present disclosure, a speaker of a cellular phone includes a diaphragm, a protector, an anode, an electromagnetic coil, a metal ring, a magnet, and a gasket. Among them, the vibration plate is a vibration body (plastic film) for vibrating air, which is one of main parts of a speaker, and MCPET material is frequently used. The protector protects the diaphragm (made of metal). The anode is used to concentrate the magnetic lines of force on the metal plate around the electromagnetic coil. The electromagnetic coil is a coil that generates a driving force when a current passes through it. The metal ring is used for gathering magnetic lines of force on the metal plate around the electromagnetic coil. The magnet is used for emitting magnetic lines. The pad is used for suppressing vibration body (air brake) and dust prevention.
In some embodiments according to the present disclosure, the speaker is typically connected to the circuit board through a contact pad, and an audio processing circuit on the circuit board is in signal communication with the speaker for controlling the operational state of the speaker.
In some embodiments according to the present disclosure, as shown in fig. 6, the audio processing circuit of the handset has the following working flow: when a call is answered, firstly, the receiving baseband information (RXI-P, RXI-N, RXQ-P and RXQ-N) of 67.707kHz is demodulated from the radio frequency circuit, and is sent to the inside of a baseband processor for digital narrow band demodulation (GMSK), and a control signal and a voice signal are separated; secondly, carrying out a series of processing such as decryption, de-interleaving, recombination and the like on the voice signal, and then carrying out channel decoding and voice decoding; finally, pure digital voice signals are obtained and sent to a multi-mode converter in the voice signal processor for digital/analog (D/A) conversion; after the analog audio signal is restored, the audio power is amplified to drive an Earphone (EAR) to sound.
Working principle of the loudspeaker circuit: the hands-free audio signals are output from the K2 and K3 pins of the speech processor N2200, amplified by the audio power amplifier N2150, and then output from the B1 and C1 pins of the audio power amplifier N2150. The signal is filtered by filters L2158 and L2159 to remove high-frequency interference, and then is output to a loudspeaker B2150 after passing through an ESD circuit V2150 to push the loudspeaker to sound, as shown in FIG. 7. Wherein, C2153 and C2154 are used for filtering high frequency and low frequency interference in the power supply, and V2150 is ESD circuit, that is, electrostatic protection circuit.
The classification of circuit boards, by board hardness, is: hard boards, soft boards and rigid-flex boards. The circuit layer number is divided into: single-sided boards, pseudo-double-sided boards, metallized hole double-sided boards, and multi-layer boards.
The current circuit board mainly comprises the following circuits and drawings (Pattern): the circuit is used as a tool for conducting elements, and a large copper surface is additionally designed on the design as a grounding and power supply layer. The lines are made simultaneously with the drawing. Dielectric layer (Dielectric): the insulating layer is used to maintain the insulation between the circuit and each layer, and is commonly called as a substrate. Pore (Through hole/via): the via hole can make more than two layers of circuits mutually conduct, the larger via hole is used as a part plug-in, and a non-conducting hole (nPTH) is usually used for surface mounting positioning and screw fixing during assembly. Solder resist ink (sol resist/sol Mask): not all of the copper surfaces will be tinned, so that areas other than the tinned areas will be printed with a layer of substance (usually epoxy) to isolate the tinned copper surfaces from shorting the non-tinned lines. According to different processes, the oil is divided into green oil, red oil and blue oil.
Screen printing (Legend/Marking/Silk Screen): this is an unnecessary configuration, and the main function is to mark the name and position frame of each component on the circuit board, so as to facilitate maintenance and identification after assembly. Surface treatment (Surface Finish): since the copper surface is easily oxidized in a general environment and tin cannot be applied (poor solderability), the copper surface to be tin-plated is protected. The protection methods include TIn spraying (HASL), gold (ENIG), silver (Immersion Silver), TIn (Immersion TIn), and Organic Solderability Preservative (OSP), and the methods have advantages and disadvantages, and are collectively called surface treatment.
According to some embodiments of the present disclosure, a handset circuit board is mainly composed of a baseband part, a radio frequency part and other parts. Other parts include: CPU, memory, various controllers, including touch screen, bluetooth, WIFI, sensor etc.. There are also some microphones, earphones, speakers, cameras, interfaces to display screens, etc. Some mobile phone circuit boards include a main PCB and an auxiliary PCB, wherein the main PCB includes a Wi-Fi module, a camera, an earphone jack, a microUSB interface, and various cables. The auxiliary PCB board is provided with a loudspeaker, a microphone and a flat cable for connecting the two PCB boards.
Fig. 8 is a schematic diagram of a handset circuit board, according to some embodiments of the present disclosure. In fig. 8, the embodiment of the circuit board for a mobile phone may include a main board 111, where the main board 111 is a common multi-layer PCB circuit board, and a baseband module connector 112 and a rf module connector 113 are disposed on the main board 111, where the baseband module connector 112 is a pad with multiple pins for soldering the baseband module chip and the power management chip to the main board 111, and the rf module connector 113 is a pad with multiple pins for soldering the rf module chip to the main board 111. The baseband module chip and the power management chip are responsible for coding.
The radio frequency module chip includes: and the radio frequency processor and the radio frequency power amplifier realize the receiving and transmitting functions of signals. The baseband module chip and the radio frequency module chip respectively realize baseband signal processing and radio frequency signal processing of the mobile phone, so the baseband module connector 112 and the radio frequency module connector 113 on the main board 111 have an important role in realizing the communication function of the mobile phone. Also provided on the main board 111 are an earphone socket connector 114, a speaker connector 115, an indicator light connector 116, a microphone connector 117, and a power supply socket connector 118, which are electrically connected to the earphone socket, the speaker, the indicator light, the microphone, and the power supply socket, respectively, and are typically pad connectors.
It is understood that "a plurality" in this disclosure means two or more, and other words are analogous. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. The singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It will be further understood that the terms "first," "second," and the like, are used to describe various information and should not be limited by these terms. These terms are only used to distinguish one type of information from another and do not denote a particular order or importance. Indeed, the terms "first," "second," and the like are fully interchangeable. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure.
It will be further understood that the terms "central," "longitudinal," "lateral," "front," "rear," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used herein to denote orientations and positional relationships, based on the orientation or positional relationship shown in the drawings, and are used merely to facilitate description of the embodiments and to simplify the description, but do not indicate or imply that the referenced devices or elements must be constructed and operated in a specific orientation.
It will be further understood that, unless otherwise specified, "connected" includes direct connections between the two without the presence of other elements, as well as indirect connections between the two with the presence of other elements.
It is further to be understood that while operations are depicted in the drawings in a particular order, this is not to be understood as requiring that such operations be performed in the particular order shown or in serial order, or that all illustrated operations be performed, to achieve desirable results. In certain environments, multitasking and parallel processing may be advantageous.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is to be limited only by the scope of the appended claims.
Claims (10)
1. The loudspeaker assembly is characterized by being applied to a mobile terminal and comprising a sound absorption device, wherein the sound absorption device comprises a sound absorption part with a cavity structure, and a sound absorption material is filled in a cavity of the sound absorption part;
the proportion relation between the size of the sound-absorbing component and the filling amount of the sound-absorbing material meets the requirement that the sound-absorbing component absorbs sound according to the specified sound-absorbing frequency.
2. The loudspeaker assembly of claim 1, wherein the sound absorbing member comprises a plurality of first sound absorbing ducts of different lengths;
a first relation exists among the size of each first sound absorbing pipeline, the filling amount of sound absorbing materials filled in each first sound absorbing pipeline and the sound absorbing frequency of each first sound absorbing pipeline;
the first relationship is:
wherein, the f p A sound absorption frequency for each of the first sound absorption ducts;
n is a high-order resonance order of each first sound-absorbing pipeline;
said L p For each length of the first sound absorbing duct;
d is the diameter of each first sound-absorbing duct;
v is p A sound speed determined based on a filling amount of the sound-absorbing material filled in each of the first sound-absorbing ducts.
3. The speaker assembly of claim 2,
the designated sound absorption frequencies further comprise a plurality of sound absorption frequencies corresponding to the plurality of first sound absorption pipelines;
the sound absorption frequencies of a plurality of the first sound absorption pipes satisfy a model relationship determined based on a finite element method and thermal viscous acoustics using porous material acoustics.
4. The loudspeaker assembly of claim 1, wherein the sound absorbing member comprises a plurality of second sound absorbing pipes of the same or different lengths and a plurality of sound absorbing cavities of the same or different volumes, each of the second sound absorbing pipes forming a helmholtz resonator with the corresponding sound absorbing cavity;
a second relation exists among the size of the Helmholtz resonator, the filling amount of the sound absorption material filled in the Helmholtz resonator and the sound absorption frequency of the Helmholtz resonator;
the second relation is as follows:
wherein, the f H The sound absorption frequency of the Helmholtz resonator;
s is the opening area of the second sound-absorbing pipeline;
the V is the volume of the sound absorbing cavity;
l is the length of the second sound-absorbing duct;
v is H A sound speed determined based on a filling amount of the sound-absorbing material filled in the Helmholtz resonator.
5. The speaker assembly of claim 4,
the specified sound absorption frequency further comprises a sound absorption frequency of the Helmholtz resonator;
the sound absorption frequencies of the Helmholtz resonators meet the model relationship determined by using porous material acoustics based on a finite element method and thermal viscous acoustics.
6. The speaker assembly of any one of claims 1-5, further comprising a front cavity;
the specified sound absorption frequency is determined based on a high-frequency resonance peak frequency value of the front cavity, and the high-frequency resonance peak frequency value is determined by simulation based on the shape and the size of the front cavity.
7. The speaker assembly of claim 6, wherein the specified sound absorption frequency is located in a frequency range determined based on the high frequency formant frequency value.
8. The loudspeaker assembly of claim 2, wherein the sound absorption frequencies corresponding to the plurality of first sound absorption pipes form one or more sound absorption bands, and each sound absorption band comprises one or more sound absorption frequencies corresponding to the first sound absorption pipes;
and each sound absorbing frequency band corresponds to a plurality of sound absorbing frequencies uniformly arranged on the first sound absorbing pipelines.
9. A mobile terminal, characterized in that it comprises a speaker assembly according to any one of claims 1-8.
10. The mobile terminal of claim 9, wherein the sound absorbing means is disposed in a gap between a rear case and a middle frame of the mobile terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110814765.9A CN115643333A (en) | 2021-07-19 | 2021-07-19 | Loudspeaker assembly and mobile terminal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110814765.9A CN115643333A (en) | 2021-07-19 | 2021-07-19 | Loudspeaker assembly and mobile terminal |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208434097U (en) * | 2018-06-04 | 2019-01-25 | 歌尔科技有限公司 | Loudspeaker mould group |
| CN209201314U (en) * | 2018-06-12 | 2019-08-02 | 瑞声科技(新加坡)有限公司 | Loudspeaker enclosure |
| CN111719720A (en) * | 2020-06-05 | 2020-09-29 | 佛山市文杰影音设备有限公司 | Sound absorbing device capable of adjusting sound absorbing frequency |
-
2021
- 2021-07-19 CN CN202110814765.9A patent/CN115643333A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208434097U (en) * | 2018-06-04 | 2019-01-25 | 歌尔科技有限公司 | Loudspeaker mould group |
| CN209201314U (en) * | 2018-06-12 | 2019-08-02 | 瑞声科技(新加坡)有限公司 | Loudspeaker enclosure |
| CN111719720A (en) * | 2020-06-05 | 2020-09-29 | 佛山市文杰影音设备有限公司 | Sound absorbing device capable of adjusting sound absorbing frequency |
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