WO2024016401A1 - 扬声器模组 - Google Patents
扬声器模组 Download PDFInfo
- Publication number
- WO2024016401A1 WO2024016401A1 PCT/CN2022/111196 CN2022111196W WO2024016401A1 WO 2024016401 A1 WO2024016401 A1 WO 2024016401A1 CN 2022111196 W CN2022111196 W CN 2022111196W WO 2024016401 A1 WO2024016401 A1 WO 2024016401A1
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- WO
- WIPO (PCT)
- Prior art keywords
- horn
- section
- sound
- speaker
- speaker box
- Prior art date
Links
- 239000011358 absorbing material Substances 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 abstract description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920001690 polydopamine Polymers 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
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
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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
Definitions
- the present invention relates to the technical field of electroacoustic conversion, and in particular, to a speaker module.
- the upper top surface and the lower bottom surface of the speaker horn of the related art speaker in the thickness direction of the terminal device are both flat; the upper top surface is parallel to the upper shell surface of the terminal device, and the lower bottom surface is parallel to the lower shell surface of the terminal device; the horn is vertically There is an extension from the horn mouth to the horn throat in the thickness direction of the terminal equipment and the length direction of the horn. Therefore, under the premise of the thin thickness of the terminal equipment, the micro-speaker is combined with the horn to achieve the purpose of low resonant frequency F0 and high loudness.
- horns in related technologies are large in size, require high shape expansion, cannot flexibly form avoidance spaces, and have poor resonance effects.
- the technical problem to be solved by the present invention is to provide a speaker module with small size, flexible avoidance space, good multi-level harmonic effect and effective widening of frequency band range.
- the present invention provides a speaker module for a mobile terminal provided with a sound outlet.
- the speaker module includes a speaker box, and the speaker box includes a sound output opening for side sound emission.
- the speaker module also includes a horn connected to the sound output opening.
- the horn is hollow and open at both ends. One end of the horn is connected to the side of the speaker box and communicates with the sound output opening. The other end of the horn is used to be connected to the sound outlet of the mobile terminal; the cross-sectional area along the sound output direction of the horn is gradually changed.
- the horn includes a top surface and a bottom surface spaced apart along the thickness direction of the speaker box, and two side surfaces connecting the bottom surface and the top surface respectively, and the bottom surface and/or the top surface are in the form of Surface.
- the horn includes a first section connected to the sound output opening, a second section bent and extended from an end of the first section away from the speaker box and spaced apart from the speaker box, and a second section formed by the third section.
- the second section extends away from one end of the first section to form a third section, the third section is used to connect to the sound outlet of the mobile terminal; the first section and the second section correspond to the
- the bottom surfaces are all flat, the top surface corresponding to the first section is a first arc-shaped surface, the top surface corresponding to the second section is a second arc-shaped surface, and the top surface corresponding to the third section is a second arc-shaped surface.
- the bottom surface and the top surface are respectively a third arc-shaped surface and a fourth arc-shaped surface, and the first arc-shaped surface, the second arc-shaped surface, the third arc-shaped surface and the fourth arc-shaped surface
- the curvatures of the faces are all different.
- the bending radius of the connection between the first section and the second section is greater than 4 times the minimum wavelength.
- the inner diameter of the connection between the first section and the second section is less than half a wavelength.
- the speaker box is rectangular, and the sound output opening is provided on a short axis side of the speaker box.
- the horns include a plurality of horns, a plurality of first sections of the horns are arranged side by side along the width direction of the speaker box, and a plurality of second sections of the horns are arranged along the width direction of the speaker box.
- the thickness direction of the speaker box is staggered and stacked, and the plurality of third sections of the plurality of horns are arranged side by side along the length direction of the speaker box.
- the second section and/or the third section are filled with sound-absorbing material.
- the speaker module of the present invention is used for a mobile terminal provided with a sound outlet.
- the speaker module includes a speaker box.
- the speaker box includes a sound output opening for side sound.
- the speaker module also includes a sound output port. Open-connected horn, the horn is hollow and open at both ends. One end of the horn is connected to the side of the speaker box and communicates with the sound output opening.
- the other end of the horn is used to connect to the sound outlet of the mobile terminal; along the sound output direction of the horn
- the cross-sectional area on the horn gradually changes; by designing variable cross-sections with different areas or lengths and widths on the horn for lofting, the variable cross-section size is directly related to the sound quality of each part of the horn, and the impedance of each part of the horn is fully coupled, thereby achieving a small volume and multiple Level resonance broadens the frequency band range. At the same time, it is small in size and has flexible space to adapt to the casings of different mobile terminals.
- Figure 1 is an axially symmetric structural diagram of the speaker module of the present invention
- Figure 2 is an axially symmetrical left view of the speaker module of the present invention
- Figure 3 is an exploded view of Figure 1;
- Figure 4 is a schematic structural diagram of the first section of Figure 1;
- Figure 5 is a schematic structural diagram of the second section of Figure 1;
- Figure 6 is a schematic structural diagram of the third section of Figure 1;
- Figure 7 is a schematic structural diagram of the overlapping multiple horns of the speaker module of the present invention.
- Figure 8 is a schematic structural diagram of the speaker module of the present invention in which the sound-absorbing material reduces the horn volume and is axially symmetrical;
- Figure 9 is an axially symmetric cross-sectional view along line A-A of Figure 8.
- Figure 10 is an SPL curve of the transmission frequency response of the speaker module of the present invention.
- Figure 11 is a sound pressure impedance change curve of the speaker module of the present invention.
- Figure 12 is a matching SPL curve diagram of the speaker module of the present invention.
- Figure 13 is a sound pressure level SPL curve diagram when the speaker module of the present invention is filled with attenuation materials
- Figure 14 is an SPL curve chart of the acoustic performance test results of the speaker module of the present invention.
- a speaker module 100 is provided for a mobile terminal (not shown) provided with a sound outlet (not shown).
- the speaker module 100 includes a speaker box 1, so
- the speaker box 1 includes a sound output opening 11 for side sound emission.
- the speaker module 100 also includes a horn 2 connected to the sound output opening 11.
- the horn 2 is hollow and open at both ends.
- the horn 2 One end of the horn 2 is connected to the side of the speaker box 1 and communicates with the sound output opening 11, and the other end of the horn 2 is used to connect to the sound outlet of the mobile terminal; along the sound output direction of the horn 2 , the cross-sectional area of the horn 2 gradually changes.
- variable cross-sections with different areas or lengths and widths on the horn 2 for lofting
- the size of the variable cross-section is directly related to the sound quality of each part of the horn 2, and the impedance of each part of the horn 2 is fully coupled, thereby achieving small-volume multi-level resonance and broadening frequency band range.
- it is small in size and has flexible space to adapt to the casings of different mobile terminals.
- the mobile terminal can be a mobile phone, computer, tablet, etc.
- the speaker module 100 By adapting the speaker module 100 to the mobile terminal and assembling the speaker box 1 and the mobile terminal through the horn 2, the acoustic performance of the mobile terminal can be improved.
- the horn 2 includes a top surface and a bottom surface spaced apart along the thickness direction of the speaker box 1, and two side surfaces respectively connecting the bottom surface and the top surface.
- the bottom surface and/or the The top surface is curved.
- the speaker in the speaker box 1 includes a diaphragm.
- the vibration direction of the diaphragm is the thickness direction of the speaker box 1 .
- the horn 2 includes a first section 21 connected to the sound output opening 11 , a section 21 bent and extended from the first section 21 to an end away from the speaker box 1 and spaced apart from the speaker box.
- the second section 22 and the third section 23 formed by extending from one end of the second section 22 away from the first section, the third section 23 is used to be connected to the sound outlet of the mobile terminal.
- the corresponding bottom surfaces of the first section 21 and the second section 22 are both flat surfaces 4, the corresponding top surface of the first section 21 is a first arc surface 5, and the corresponding top surface of the second section 22 is the second arcuate surface 6, the bottom surface and the top surface corresponding to the third section 23 are the third arcuate surface 7 and the fourth arcuate surface 10 respectively, the first arcuate surface 5, the The second arcuate surface 6 , the third arcuate surface 7 and the fourth arcuate surface 10 all have different curvatures.
- the sound output opening 11 provided on the sound output side of the speaker box 1 is connected to the horn 2 for transmitting the sound emitted by the speaker box 1 , thereby improving the acoustic performance of the speaker box 1 .
- the horn 2 includes a first section 21, a second section 22 and a third section 23, the horn 2 is designed with a variable cross-section with different areas or lengths and widths for setting out, so that the variable cross-section size is directly related to each part of the horn 2 To improve the sound quality, the impedance of each part of the horn 2 is fully coupled, thereby achieving multi-level resonance in a small volume and broadening the frequency band range.
- the bending radius of the connection between the first section 21 and the second section 22 is greater than 4 times the minimum wavelength. As shown in Figure 10-11, simulation shows that excellent acoustic transmission performance can be achieved only when the bending radius exceeds 4 times the minimum wavelength.
- the sound emission directions of the first section 21 and the third section 23 are bent at 90° through the second section 22, so that the size of the horn is small, and it is designed according to the cross section of the curve path, so that it can fit into the casing of the mobile terminal. , the avoidance effect is good.
- the inner diameter of the connection between the first section 21 and the second section 22 is less than half a wavelength.
- the radius of the horn 2 is less than half the wavelength, the high-frequency sound waves are reversed after passing through the bend, resulting in a sound cutoff phenomenon. If the bending size of horn 2 is less than half a wavelength, its high-frequency cutoff will be improved and the frequency bandwidth will be broadened.
- the vertical direction of the horn 2 is designed as a variable cross-section with different areas or lengths and widths. The variable cross-section size is directly related to the sound quality of each part of the horn. The impedance of each part of the horn 2 is fully coupled to achieve multi-level resonance.
- the speaker box 1 is rectangular, and the sound output opening 11 is provided on the short axis side of the speaker box.
- the frequency response curve of the symmetrical horn 2 produces an extremely deep valley value at 11.5kHz; as shown in Figure 12, a sound pressure node appears in the horizontal axis direction of the speaker at this frequency, resulting in sound output. Valley; increase the sound output port in the vertical axis direction, change the sound pressure intensity on both sides of the horizontal axis, increase the 11.5kHz valley value, and have good acoustic performance.
- the horns 2 include multiple first sections of the horns 2 arranged side by side along the width direction of the speaker box 1 , and the first sections of the horns 2 are arranged side by side.
- the second sections 22 are arranged in staggered stacks along the thickness direction of the speaker box 1
- the plurality of third sections 23 of the plurality of horns 2 are arranged side by side along the length direction of the speaker box 1 .
- the number of horns 2 is 2, 3, 4, etc., selected according to actual needs.
- multi-layer overlapping of speaker semi-horns 2 is used to control the width of the single-layer horn 2 to be less than half a wavelength, thereby increasing the cut-off frequency of the horn 2, achieving smooth sound transmission and improving high-frequency performance.
- the resonant peaks of each horn 2 are coupled to improve the high-frequency performance.
- the volume and space requirements can be reduced, the lengths of multiple first sections 21 and second sections 22 can be extended, and the number of resonant frequencies can be increased.
- Multi-level resonance is controlled through multiple horn 2 parts to achieve high-frequency boosting effects at multiple frequencies.
- the three horns 2 are arranged side by side or crosswise with each other. It is also possible that two horns 2 are arranged side by side, and one horn 2 overlaps with one of the two horns 2 or is arranged between the two horns 2 . Multi-level resonance is controlled through multiple horn 2 parts to achieve high-frequency boosting effects at multiple frequencies.
- the second section 22 and/or the third section 23 are filled with sound-absorbing material.
- the sound-absorbing material By filling the sound-absorbing material to increase the damping of the horn 2, compensate the symmetrical horn 2 response curve and improve the high-frequency performance.
- the SPL curve of ori is compared with the SPL curve of ori+internal impedance 1100Pa*s/m+expansion space.
- the symmetrical formula from the sound output side of the speaker in the transverse axis direction to the sound output opening 11 of the device Horn 2 creates valleys at the high-frequency position, and uses small cavities to fill attenuation materials to increase pipe damping and smooth the high-frequency SPL curve. By increasing the local volume and changing the sound volume, the resonant frequency point can be controlled.
- the first section 21 includes a first opening 211 that is in contact with the sound output opening 11 , a first opening 212 connected to one end of the second section 22 , and a first opening 212 connected to one end of the second section 22 .
- the opening 211 extends toward the first opening 212 to form a first side wall 213 and a second side wall 214. Both ends of the first opening 211 gradually decrease and extend toward the first opening 212 to form the first side wall 213 and the second side wall 214.
- a curved surface 5 5.
- the said The first arc surface 5 the bottom surface of the first section 21 is the flat surface 4, and the top surface is the first arc surface 5, so that the cross section of the first section 21 of the horn 2 gradually changes shape, thereby improving the sound quality of the horn 2.
- one end opening of the horn is a first opening 211
- the first opening 211 is the horn port 9 for connecting with the sound output opening 11 .
- the length of the first opening 211 is greater than the length of the first opening 212 , and the width of the first opening 211 is less than the width of the first opening 212 . It is convenient to gather the sound output from the sound output opening 11, and the sound quality effect is good.
- the second section 22 includes a third opening 221 that cooperates with the first opening 212 , a fourth opening 222 connected to one end of the third section 23 , and a third opening 221 connected to the third opening 221 .
- the third side wall 223 and the fourth side wall 224 are bent and extended toward the fourth opening 222 .
- the third opening 221 is used to transmit the sound output from the first opening 212 to the fourth opening 222, and transmit the sound out through the fourth opening 222. Due to the different cross-sectional structures of the first section 21 and the second section 22, and at the same time, the thickness of the first opening 211, the first opening 212 and the fourth opening 222 increases step by step, the sound can be resonant in multiple levels and the frequency band range can be broadened. .
- the thickness of the third opening 221 is the same as the thickness of the first opening 212 .
- the cross section of the fourth side wall 224 parallel to the thickness direction of the speaker box 1 has a semicircular structure. Easy to manufacture.
- the third side wall 223 and the fourth side wall 224 are arranged vertically. It is convenient to bend the second section 22 and save installation space.
- the third section 23 includes a fifth opening 231 that cooperates with the fourth opening 222, a fifth side wall 233 extending from the fifth opening 231 in a direction away from the fourth opening 222, and The sixth side wall 234 and the sixth opening 232 connected between the fifth side wall 233 and the six side walls, the first side wall 213, the third side wall 223 and the fifth The side walls 233 together form the avoidance position 3 .
- the opening at the other end of the horn is a sixth opening 232 , and the sixth opening 232 is the horn waiting port 10 .
- the third section 23 protrudes to both sides parallel to the thickness direction of the speaker box 1 to form the third arcuate surface 7 and the fourth arcuate surface respectively.
- the sensitivity of the conventional side-firing module 2 at the same frequency is lower than that of the multi-level horn plus sound port matching model 1, the first version of the 2-level horn 3, and the first version of the 2-level horn plus sound absorption.
- the speaker module of the present invention is used for a mobile terminal provided with a sound outlet.
- the speaker module includes a speaker box.
- the speaker box includes a sound output opening for side sound.
- the speaker module also includes a sound output port. Open-connected horn, the horn is hollow and open at both ends. One end of the horn is connected to the side of the speaker box and communicates with the sound output opening.
- the other end of the horn is used to connect to the sound outlet of the mobile terminal; along the sound output direction of the horn , the cross-sectional area of the horn gradually changes; by designing a variable cross-section with different areas or lengths and widths on the horn, the variable cross-section size is directly related to the sound quality of each part of the horn, and the impedance of each part of the horn is fully coupled, thereby achieving a small volume Multi-level resonance broadens the frequency band range. At the same time, it is small in size and has flexible space to adapt to the casings of different mobile terminals.
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- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
Abstract
本发明属于电声转换技术领域，本发明提供一种扬声器模组，用于设有出声口的移动终端，扬声器模组包括扬声器箱，扬声器箱包括用于侧面发声的声音输出开口，扬声器模组还包括与声音输出开口连接的号筒，号筒呈中空且两端开口，号筒的一端连接至扬声器箱的侧面并与声音输出开口连通，号筒的另一端用于连接至移动终端的出声口；沿号筒的出声方向上的截面面积呈渐变；通过在号筒上设计为面积或长宽不一的变截面进行放样，使得变截面尺寸直接关联号筒各部分声质量，号筒采用基于传输线网络理论优化耦合号筒局部阻抗，实现小体积多级谐振，拓宽频带范围。与相关技术相比，本发明能实现多级谐振、体积小、便于拓宽频带范围及具有灵活避让空间。
Description
本发明涉及电声转换技术领域，尤其涉及一种扬声器模组。
随着电声转换技术的发展，现已应用于电脑、手机、MP4、PDA 等终端电子装置中。伴随着电子行业和科学技术的不断进步与发展，受众对于扬声器的声学性能也必然提出更高的要求，使得扬声器模组在各种终端设备中得到广泛的应用。
相关技术的扬声器的号筒在终端设备的厚度方向上的上顶面与下底面均为平面；上顶面与终端设备的上壳面平行，下底面与终端设备的下壳面平行；号筒在垂直于终端设备的厚度方向和号筒的长度方向上，由号筒口至号筒喉口具有延展。从而使得终端设备的厚度较薄的制约的前提下，将微型扬声器与号筒结合，达到了其共振频率F0低、响度又大的目的。
然而，相关技术的号筒体积大，对形状扩展的要求较高，不能灵活的形成避让空间，谐振效果差。
因此，有必要提供一种新的扬声器模组来解决上述问题。
本发明要解决的技术问题是提供一种体积小、灵活避让空间、多级谐效果好及有效拓宽频带范围的扬声器模组。
为解决上述技术问题，本发明提供了一种扬声器模组，用于设有出声口的移动终端，所述扬声器模组包括扬声器箱，所述扬声器箱包括用于侧面发声的声音输出开口，所述扬声器模组还包括与所述声音输出开口连接的号筒，所述号筒呈中空且两端开口，所述号筒的一端连接至所述扬声器箱的侧面并与所述声音输出开口连通，所述号筒的另一端用于连接至所述移动终端的出声口；沿所述号筒的出声方向上的截面面积呈渐变。
优选的，所述号筒包括沿所述扬声器箱的厚度方向间隔设置的顶面和底面，以及分别连接所述底面和所述顶面的两个侧面，所述底面和/或所述顶面呈曲面。
优选的，所述号筒包括连接所述声音输出开口的第一段、由所述第一段远离所述扬声器箱的一端弯折延伸并与所述扬声器箱间隔的第二段以及由所述第二段远离所述第一段的一端延伸形成的第三段，所述第三段用于连接至所述移动终端的出声口；所述第一段和所述第二段对应的所述底面均为平面，所述第一段对应的所述顶面为第一弧形面，所述第二段对应的所述顶面为第二弧形面，所述第三段对应的所述底面和所述顶面分别为第三弧形面和第四弧形面，所述第一弧形面、所述第二弧形面、所述第三弧形面以及所述第四弧形面的弧度皆相异。
优选的，所述第一段与所述第二段之间的连接处的弯曲半径大于4倍最小波长。
优选的，所述第一段与所述第二段之间的连接处的内径小于半波长。
优选的，所述扬声器箱呈矩形，所述声音输出开口设置于所述扬声器箱的短轴边。
优选的，所述号筒包括多个，多个所述号筒的多个所述第一段沿所述扬声器箱的宽度方向并排设置，多个所述号筒的多个所述第二段沿所述扬声器箱的厚度方向交错叠层设置，多个所述号筒的多个所述第三段沿所述扬声器箱的长度方向并排设置。
优选的，所述第二段和/或所述第三段内填充吸声材料。
与相关技术相比，本发明扬声器模组，用于设有出声口的移动终端，扬声器模组包括扬声器箱，扬声器箱包括用于侧面发声的声音输出开口，扬声器模组还包括与声音输出开口连接的号筒，号筒呈中空且两端开口，号筒的一端连接至扬声器箱的侧面并与声音输出开口连通，号筒的另一端用于连接至移动终端的出声口；沿号筒的出声方向上的截面面积呈渐变；通过在号筒上设计为面积或长宽不一的变截面进行放样，使得变截面尺寸直接关联号筒各部分声质量，号筒各部分阻抗充分耦合，以此实现小体积多级谐振，拓宽频带范围，同时，体积小，灵活避让空间以便于适配不同移动终端的机壳。
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图，其中：
图1为本发明扬声器模组轴对称的结构示意图；
图2为本发明扬声器模组轴对称的左视图；
图3为图1的爆炸图；
图4为图1的第一段的结构示意图；
图5为图1的第二段的结构示意图；
图6为图1的第三段的结构示意图；
图7为本发明扬声器模组的交叠式多号筒的结构示意图；
图8为本发明扬声器模组的吸声材料减小号筒体积轴对称的结构示意图；
图9为图8的A-A线轴对称的剖视图；
图10为本发明扬声器模组的传递频响的SPL曲线图；
图11为本发明扬声器模组的声压阻抗变化曲线图；
图12为本发明扬声器模组的匹配SPL曲线图；
图13为本发明扬声器模组填充有衰减材料时的声压级SPL曲线图；
图14为本发明扬声器模组的声学性能测试结果SPL曲线图。
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本发明保护的范围。
请参阅图1-9所示，提供一种扬声器模组100，用于设有出声口（未示出）的移动终端（未示出），所述扬声器模组100包括扬声器箱1，所述扬声器箱1包括用于侧面发声的声音输出开口11，所述扬声器模组100还包括与所述声音输出开口11连接的号筒2，所述号筒2呈中空且两端开口，所述号筒2的一端连接至所述扬声器箱1的侧面并与所述声音输出开口11连通，所述号筒2的另一端用于连接至所述移动终端的出声口；沿所述号筒2的出声方向，所述号筒2的截面面积呈渐变。通过在号筒2上设计为面积或长宽不一的变截面进行放样，使得变截面尺寸直接关联号筒2各部分声质量，号筒2各部分阻抗充分耦合，以此实现小体积多级谐振，拓宽频带范围。同时，体积小，灵活避让空间以便于适配不同移动终端的机壳。
可选的，移动终端可以是手机、电脑、平板等。通过将扬声器模组100适配于移动终端内，通过号筒2将扬声器箱1和移动终端组装设置，便于提高移动终端的声学性能。
本实施方式中，所述号筒2包括沿所述扬声器箱1的厚度方向间隔设置的顶面和底面，以及分别连接所述底面和所述顶面的两个侧面，所述底面和/或所述顶面呈曲面。
其中，扬声器箱1内扬声器包括振膜，在该侧面发声的扬声器箱1中，振膜的振动方向即为所述扬声器箱1的厚度方向。通过将号筒2在厚度方向上间隔设置的顶面和底面以及分别连接所述底面和所述顶面的两个侧面，使号筒2的在出声方向的截面为渐变效果，实现多级谐振，拓宽频带范围。
本实施方式中，所述号筒2包括连接所述声音输出开口11的第一段21、由所述第一段21向远离所述扬声器箱1的一端弯折延伸并与所述扬声器箱间隔的第二段22以及由所述第二段22远离所述第一段的一端延伸形成的第三段23，所述第三段23用于连接至移动终端的出声口。所述第一段21和所述第二段22对应的底面均为平面4，所述第一段21的对应的顶面为第一弧形面5，所述第二段22对应的顶面为第二弧形面6，所述第三段23对应的所述底面和所述顶面分别为第三弧形面7和第四弧形面10，所述第一弧形面5、所述第二弧形面6、所述第三弧形面7以及所述第四弧形面10的弧度皆相异。
具体的，扬声器箱1的出声侧设置的声音输出开口11与号筒2连接，用于将扬声器箱1发出的声音进行传输，从而提高扬声器箱1的声学性能。由于所述号筒2包括第一段21、第二段22和第三段23，通过在号筒2上设计为面积或长宽不一的变截面进行放样，使得变截面尺寸直接关联号筒2各部分声质量，号筒2各部分阻抗充分耦合，以此实现小体积多级谐振，拓宽频带范围。
本实施方式中，所述第一段21与所述第二段22之间的连接处的弯曲半径大于4倍最小波长。如图10-11所示，通过仿真表明，当弯曲半径超过4倍最小波长方可实现优异的声学传输性能。
优选的，第一段21与第三段23的出声方向通过第二段22处弯折呈90°，使得号筒的体积小，依照曲线路径的截面进行设计，可适配移动终端的机壳，避让效果好。
本实施方式中，所述第一段21与所述第二段22之间的连接处的内径小于半波长。当号筒2的半径小于半波长时，高频声波经过弯折处反向，产生声音截止现象。若号筒2采用小于半波长的弯折尺寸，将会改善其高频截止，拓宽频带宽度。以传输线模型为理论基础，将号筒2垂直方向设计为面积或长宽不一的变截面进行放样，变截面尺寸直接关联号筒各部分声质量，号筒2各部分阻抗充分耦合，实现多级谐振。
本实施方式中，所述扬声器箱1呈矩形，所述声音输出开口11设置于所述扬声器箱的短轴边。
具体的，通过加入移动终端的机壳孔后，对称式号筒2频响曲线在11.5kHz产生极深谷值；如图12所示，该频率在扬声器横轴方向出现声压节点，导致声音输出存在坑谷；在纵轴方向增加声音输出口，改变横轴两侧声压强度，提升11.5kHz谷值，声学性能良好。
本实施方式中，所述号筒2包括多个，多个所述号筒2的多个所述第一段沿所述扬声器箱1的宽度方向并排设置，多个所述号筒2的多个所述第二段22沿所述扬声器箱1的厚度方向交错叠层设置，多个所述号筒2的多个所述第三段23沿所述扬声器箱1的长度方向并排设置。可选的，多个号筒2为2个、3个、4个等，具体根据实际需求选择。
具体的，利用扬声器分号筒2多层交叠，控制单层号筒2宽度小于半波长，提升号筒2的截止频率，实现声音传输平滑，提升高频性能。通过将第一段21和第二段22两条号筒2的截面渐变，耦合各号筒2谐振峰，提升高频性能。同时，还能减小体积和空间需求，延长多个第一段21和第二段22的长度，增加谐振频率数目。通过多个号筒2部分控制多级谐振，实现多个频率的高频提升效果。
优选的，当号筒2为3个时，3个号筒2呈并排或相互交叉设置。也可以是两个号筒2实现并排，一个号筒2与两个号筒2其一交叠或设置在两个号筒2之间。通过多个号筒2部分控制多级谐振，实现多个频率的高频提升效果。
本实施方式中，所述第二段22和/或所述第三段23内填充吸声材料。通过填充吸声材料增加号筒2阻尼，补偿对称式号筒2响应曲线，提升高频性能。
具体的，如图13所示，图中将ori的SPL曲线与ori+内部阻抗1100Pa*s/m+扩展空间的SPL曲线进行了对比，扬声器横轴方向出声侧至设备声音输出开口11的对称式号筒2在高频位置处产生坑谷，利用小腔体填充衰减材料增加管道阻尼，抹平高频SPL曲线。通过增大局部体积，改变声容，进而实现对谐振频率点的控制。
本实施方式中，所述第一段21包括配合抵接在所述声音输出开口11的第一开口211、与所述第二段22的一端连接的第一开口212、以及由所述第一开口211向所述第一开口212延伸形成的第一侧壁213和第二侧壁214，所述第一开口211的两端向所述第一开口212的方向逐渐减小延伸形成所述第一弧形面5。通过声音输出开口11将扬声器箱1的声音通过第一开口211传输的第一开口212上，由于所述第一开口211的两端向所述第一开口212的方向逐渐减小延伸形成所述第一弧形面5，第一段21的底面为平面4，顶面为第一弧形面5，使得号筒2的第一段21的截面呈逐渐变化形状，提高号筒2的声音质量。
其中，号筒的一端开口为第一开口211，第一开口211为所述号筒口9，用于与声音输出开口11连接。
本实施方式中，所述第一开口211的长度大于所述第一开口212的长度，所述第一开口211的宽度小于所述第一开口212的宽度。便于将声音输出开口11输出的声音进行聚集，音质效果良好。
本实施方式中，所述第二段22包括与所述第一开口212配合的第三开口221、与所述第三段23的一端连接的第四开口222、以及由所述第三开口221向所述第四开口222呈弯折延伸形成的第三侧壁223和第四侧壁224。第三开口221用于将第一开口212输出的声音传递到第四开口222，通过第四开口222将声音传出。通过第一段21和第二段22的截面结构不同，同时，上述第一开口211、第一开口212及第四开口222的厚度呈逐级递增，可以将声音进行多级谐振，拓宽频带范围。
本实施方式中，所述第三开口221的厚度与所述第一开口212的厚度相同。
本实施方式中，所述第四侧壁224平行于所述扬声器箱1的厚度方向的截面为半圆形结构。制造方便。
本实施方式中，所述第三侧壁223与所述第四侧壁224之间垂直设置。便于使第二段22进行弯折，节约安装空间。
本实施方式中，所述第三段23包括与所述第四开口222配合的第五开口231、由所述第五开口231向远离所述第四开口222方向延伸的第五侧壁233和第六侧壁234、以及连接在所述第五侧壁233与所述六侧壁之间的第六开口232，所述第一侧壁213、所述第三侧壁223及所述第五侧壁233共同围成所述避让位3。可以适配多种机壳。
其中，号筒的另一端开口为第六开口232，第六开口232为号筒候口10。
本实施方式中，所述第三段23分别向平行于所述扬声器箱1的厚度方向的两侧突出形成所述第三弧形面7和第四弧形面。
本实施方式中，如图14所示，常规侧发声模组2在同一频率下的灵敏度均低于多级号角加出声口匹配模型1、初版2级号角3、初版2级号角加吸声材料4、多级变截面号角5、多级变截面号角加吸声材料6及大后腔模组正发声7的灵敏度。因此，通过上述的测试结果可知，与常规侧发声模组2相比，各类带号筒方案均有高频频带提升；其中，多级号筒匹配加出声孔匹配模型1的频带宽度和频响浮动均高于其他方案。
与相关技术相比，本发明扬声器模组，用于设有出声口的移动终端，扬声器模组包括扬声器箱，扬声器箱包括用于侧面发声的声音输出开口，扬声器模组还包括与声音输出开口连接的号筒，号筒呈中空且两端开口，号筒的一端连接至扬声器箱的侧面并与声音输出开口连通，号筒的另一端用于连接至移动终端的出声口；沿号筒的出声方向，号筒的截面面积呈渐变；通过在号筒上设计为面积或长宽不一的变截面进行放样，使得变截面尺寸直接关联号筒各部分声质量，号筒各部分阻抗充分耦合，以此实现小体积多级谐振，拓宽频带范围，同时，体积小，灵活避让空间以便于适配不同移动终端的机壳。
以上所述的仅是本发明的实施方式，在此应当指出，对于本领域的普通技术人员来说，在不脱离本发明创造构思的前提下，还可以做出改进，但这些均属于本发明的保护范围。
Claims (8)
- 一种扬声器模组，用于设有出声口的移动终端，所述扬声器模组包括扬声器箱，所述扬声器箱包括用于侧面发声的声音输出开口，其特征在于，所述扬声器模组还包括与所述声音输出开口连接的号筒，所述号筒呈中空且两端开口，所述号筒的一端连接至所述扬声器箱的侧面并与所述声音输出开口连通，所述号筒的另一端用于连接至所述移动终端的出声口；沿所述号筒的出声方向上的截面面积呈渐变。
- 根据权利要求1所述的扬声器模组，其特征在于，所述号筒包括沿所述扬声器箱的厚度方向间隔设置的顶面和底面，以及分别连接所述底面和所述顶面的两个侧面，所述底面和/或所述顶面呈曲面。
- 根据权利要求2所述的扬声器模组，其特征在于，所述号筒包括连接所述声音输出开口的第一段、由所述第一段远离所述扬声器箱的一端弯折延伸并与所述扬声器箱间隔的第二段以及由所述第二段远离所述第一段的一端延伸形成的第三段，所述第三段用于连接至所述移动终端的出声口；所述第一段和所述第二段对应的所述底面均为平面，所述第一段对应的所述顶面为第一弧形面，所述第二段对应的所述顶面为第二弧形面，所述第三段对应的所述底面和所述顶面分别为第三弧形面和第四弧形面，所述第一弧形面、所述第二弧形面、所述第三弧形面以及所述第四弧形面的弧度皆相异。
- 根据权利要求3所述的扬声器模组，其特征在于，所述第一段与所述第二段之间的连接处的弯曲半径大于4倍最小波长。
- 根据权利要求4所述的扬声器模组，其特征在于，所述第一段与所述第二段之间的连接处的内径小于半波长。
- 根据权利要求2所述的扬声器模组，其特征在于，所述扬声器箱呈矩形，所述声音输出开口设置于所述扬声器箱的短轴边。
- 根据权利要求6所述的扬声器模组，其特征在于，所述号筒包括多个，多个所述号筒的多个所述第一段沿所述扬声器箱的宽度方向并排设置，多个所述号筒的多个所述第二段沿所述扬声器箱的厚度方向交错叠层设置，多个所述号筒的多个所述第三段沿所述扬声器箱的长度方向并排设置。
- 根据权利要求3所述的扬声器模组，其特征在于，所述第二段和/或所述第三段内填充吸声材料。
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| CN203039873U (zh) * | 2012-12-06 | 2013-07-03 | 天津中环真美声学技术有限公司 | 扬声器用不完全对称矩形号筒 |
| CN204518013U (zh) * | 2015-01-22 | 2015-07-29 | 邹士磊 | 高辐射抗型耳机 |
| CN205491111U (zh) * | 2016-01-14 | 2016-08-17 | 广州市声讯电子科技有限公司 | 一种高清远程强声器 |
| CN106162458A (zh) * | 2016-07-19 | 2016-11-23 | 南京大学 | 一种扬声器声传导腔体装置 |
| US20200068293A1 (en) * | 2018-08-27 | 2020-02-27 | Hans-Christoph Kastl | Bass Loud Speaker for Corner Placement |
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| CN203039873U (zh) * | 2012-12-06 | 2013-07-03 | 天津中环真美声学技术有限公司 | 扬声器用不完全对称矩形号筒 |
| CN204518013U (zh) * | 2015-01-22 | 2015-07-29 | 邹士磊 | 高辐射抗型耳机 |
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