WO2021000118A1 - 扬声器 - Google Patents

扬声器 Download PDF

Info

Publication number
WO2021000118A1
WO2021000118A1 PCT/CN2019/094016 CN2019094016W WO2021000118A1 WO 2021000118 A1 WO2021000118 A1 WO 2021000118A1 CN 2019094016 W CN2019094016 W CN 2019094016W WO 2021000118 A1 WO2021000118 A1 WO 2021000118A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
speaker
dome
diaphragm
vibration
Prior art date
Application number
PCT/CN2019/094016
Other languages
English (en)
French (fr)
Inventor
邱志强
刘莎莎
Original Assignee
瑞声声学科技(深圳)有限公司
瑞声科技(新加坡)有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 瑞声声学科技(深圳)有限公司, 瑞声科技(新加坡)有限公司 filed Critical 瑞声声学科技(深圳)有限公司
Priority to PCT/CN2019/094016 priority Critical patent/WO2021000118A1/zh
Priority to CN201921031390.3U priority patent/CN210093484U/zh
Publication of WO2021000118A1 publication Critical patent/WO2021000118A1/zh

Links

Classifications

    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction

Definitions

  • This application relates to the field of electro-acoustic conversion, in particular to a speaker.
  • Related art speakers include a basin frame and a vibration system and a magnetic circuit system respectively fixed to the basin frame.
  • the vibration system includes a diaphragm fixed to the basin frame and a voice coil that drives the diaphragm to vibrate and produce sound.
  • the membrane includes the dome.
  • a magnetic gap is formed between the main magnet 70 and the auxiliary magnet 80 of the magnetic circuit system.
  • the voice coil is inserted into the magnetic gap.
  • the airflow can only flow through the narrow magnetic gap in the direction of the arrow. , It is easy to produce a larger flow velocity and then produce high-frequency noise.
  • the technical problem to be solved by this application is to provide a loudspeaker that can effectively reduce the energy of the front cavity resonance peak and reduce distortion while reducing the amplification effect of high-frequency resonance on noise.
  • a loudspeaker including a basin frame, a vibration system fixed to the basin frame, and a magnetic circuit system.
  • the vibration system includes a diaphragm fixed to the basin frame and a driving station.
  • a voice coil with a vibrating diaphragm that produces sound, the diaphragm includes a dome, the dome includes a first layer and a second layer of a microporous structure, the first layer and the second layer are stacked and fixedly connected .
  • the first layer is closer to the voice coil than the second layer.
  • the diaphragm further includes a vibrating portion connected with the dome, a folding ring portion extending outward from the vibrating portion, and a fixing portion continuing to extend outward from the folding ring portion, the first The layer is fixedly connected with the vibration part.
  • the second layer is closer to the voice coil than the first layer.
  • the diaphragm further includes a vibration part connected with the dome, a folding ring part extending outward from the vibration part, and a fixing part continuing to extend outward from the folding ring part, and the second The layer is fixedly connected with the vibration part.
  • the second layer is made of a foamed metal material with a microporous structure.
  • the material of the second layer is foamed aluminum or foamed nickel.
  • the first layer is an aluminum foil layer.
  • the thickness of the first layer is the same as the thickness of the second layer.
  • the speaker of the present application includes a first layer and a second layer of a microporous structure by arranging the dome top, while limiting the first layer and the second layer to be stacked and fixedly connected.
  • the microporous structure has large acoustic damping, which can effectively reduce the energy of the front cavity resonance peak, reduce distortion and reduce the amplification effect of high-frequency resonance on noise; by setting the first layer more than the second layer Close to the voice coil to adjust the acoustic damping in the speaker by using the microporous structure of the second layer, absorb the energy of high-frequency resonance, reduce the sensitivity and distortion of the resonance frequency band, and reduce the effect of the resonance peak on noise
  • the amplification effect is to optimize the acoustic performance and playback effect of the speaker; by setting the second layer closer to the voice coil than the first layer, the airflow in the speaker is removed from the conventional path The outside can also flow through the microporous structure, and the air in the internal gap of the microporous structure has strong damp
  • Fig. 1 is a schematic diagram of a plane structure of a gas flow in a related art speaker
  • FIG. 2 is a schematic diagram of the three-dimensional structure of the speaker provided by this application.
  • FIG. 3 is a schematic diagram of a planar structure of a vibration system of a speaker provided by Embodiment 1 of the application;
  • FIG. 4 is a schematic diagram of the planar structure of the vibration system of the speaker provided in the second embodiment of the application.
  • the speaker 100 includes a basin frame 11, a vibration system 13 and a magnetic circuit system 15 respectively fixed to the basin frame 11.
  • the vibration system 13 includes a diaphragm 131 fixed to the frame 11 and a voice coil 133 dome 1311 that drives the diaphragm 131 to vibrate and produce sound.
  • the diaphragm 131 includes a dome 1311, a vibrating portion 1313 connected to the dome 1311, a folding ring portion 1315 extending outward from the vibrating portion 1313, and a fixing that continues to extend outward from the folding ring portion 1315. ⁇ 1317.
  • the fixing portion 1317 is fixedly connected to the basin frame 11, so that the diaphragm 131 is fixed to the basin frame 11.
  • the dome 1311 includes a first layer 13111 and a second layer 13113 with a microporous structure. Wherein, the first layer 13111 and the second layer 13113 are stacked and fixedly connected.
  • the microporous structure of the second layer 13113 has relatively large acoustic damping, which can effectively reduce the energy of the front cavity resonance peak, reduce distortion and reduce the amplification effect of high-frequency resonance on noise.
  • the first layer 13111 is an aluminum foil layer
  • the second layer 13113 is made of a foamed metal material with a microporous structure.
  • foamed aluminum foamed nickel, etc.
  • the material of the second layer 13113 is foamed aluminum.
  • the thickness of the first layer 13111 is the same as the thickness of the second layer 1351.
  • the first layer 13111 is closer to the voice coil 133 than the second layer 13113, and the first layer 13111 is fixedly connected to the vibrating part 1313. That is to say, the second layer 13113 is located on the first layer 13111 to adjust the acoustic damping in the speaker 100 by using the microporous structure of the second layer 13113 to absorb high-frequency resonance energy. The sensitivity and distortion of the frequency band in the resonance region are reduced, and the amplification effect of the resonance peak on the noise is reduced, so as to optimize the acoustic performance and playback effect of the speaker 100.
  • the above description of the positional relationship of "the second layer 13113 is located on the first layer 13111" is based on FIG. 3.
  • the second layer The positional relationship between 13113 and the first layer 13111 should also be changed accordingly.
  • the structure of the speaker provided in this embodiment is basically the same as that of the speaker 100 provided in Embodiment 1, and the difference lies in the positional relationship between the first layer 23111 and the second layer 23113.
  • the second layer 23113 is closer to the voice coil 233 than the first layer 23111, and the second layer 23113 is fixedly connected to the vibration part.
  • the airflow in the speaker provided in this embodiment can flow through the microporous structure in addition to the conventional path, and the air in the internal gap of the microporous structure has stronger damping. Used to absorb high frequency noise.
  • the speaker of the present application includes a first layer and a second layer of a microporous structure by arranging the dome top, while limiting the first layer and the second layer to be stacked and fixedly connected.
  • the microporous structure has large acoustic damping, which can effectively reduce the energy of the front cavity resonance peak, reduce distortion and reduce the amplification effect of high-frequency resonance on noise; by setting the first layer more than the second layer Close to the voice coil to adjust the acoustic damping in the speaker by using the microporous structure of the second layer, absorb the energy of high-frequency resonance, reduce the sensitivity and distortion of the resonance frequency band, and reduce the effect of the resonance peak on noise
  • the amplification effect is to optimize the acoustic performance and playback effect of the speaker; by setting the second layer closer to the voice coil than the first layer, the airflow in the speaker is removed from the conventional path The outside can also flow through the microporous structure, and the air in the internal gap of the microporous structure has strong damp

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Multimedia (AREA)
  • Manufacturing & Machinery (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

本申请提供了一种扬声器，包括盆架及分别固定于所述盆架的振动系统及磁路系统，所述振动系统包括固定于所述盆架的振膜及驱动所述振膜振动发声的音圈，所述振膜包括球顶，所述球顶包括第一层及多微孔结构的第二层，所述第一层和所述第二层叠设且固定连接。与相关技术相比，本申请提供的扬声器通过设置具多微孔结构的所述第二层，因此结构具备较大的声阻尼，可以有效降低前腔谐振峰的能量，降低失真的同时减小高频谐振对噪声的放大作用。

Description

扬声器 技术领域
本申请涉及电声转换领域，尤其涉及一种扬声器。
 背景技术
随着移动互联网时代的到来，智能移动设备的数量不断上升。而在众多移动设备之中，手机无疑是最常见、最便携的移动终端设备。目前，手机的功能极其多样，其中之一便是高品质的音乐功能，因此，用于播放声音的扬声器被大量应用到现在的智能移动设备之中。
 技术问题
相关技术的扬声器包括盆架及分别固定于盆架的振动系统及磁路系统，所述振动系统包括固定于所述盆架的振膜及驱动所述振膜振动发声的音圈，所述振膜包括球顶。
然而，相关技术的扬声器往往存在明显的前腔谐振，在高频谐振附近，能量过高，通常会明显放大失真及噪声。同时，请参阅图1，磁路系统的主磁钢70与副磁钢80之间形成磁间隙，音圈插入磁间隙，扬声器在工作时，气流仅能照箭头的方向流动经过狭窄的磁间隙，容易产生较大的流速继而产生高频噪声。
因此，有必要提供一种新的扬声器来解决上述问题。
 技术解决方案
本申请要解决的技术问题是提供一种可以有效降低前腔谐振峰的能量，降低失真的同时减小高频谐振对噪声的放大作用的扬声器。
为解决上述技术问题，本申请提供了一种扬声器，包括盆架、分别固定于所述盆架的振动系统及磁路系统，所述振动系统包括固定于所述盆架的振膜及驱动所述振膜振动发声的音圈，所述振膜包括球顶，所述球顶包括第一层及多微孔结构的第二层，所述第一层和所述第二层叠设且固定连接。
优选的，所述第一层相对于所述第二层更靠近所述音圈。
优选的，所述振膜还包括与所述球顶连接的振动部、自所述振动部向外延伸的折环部及自所述折环部继续向外延伸的固定部，所述第一层与所述振动部固定连接。
优选的，所述第二层相对于所述第一层更靠近所述音圈。
优选的，所述振膜还包括与所述球顶连接的振动部、自所述振动部向外延伸的折环部及自所述折环部继续向外延伸的固定部，所述第二层与所述振动部固定连接。
优选的，所述第二层由具有多微孔结构的发泡金属材料制成。
优选的，所述第二层的材料为发泡铝或发泡镍。
优选的，所述第一层为铝箔层。
优选的，所述第一层的厚度与所述第二层的厚度相同。
 有益效果
与相关技术相比，本申请的扬声器通过设置所述球顶包括第一层及多微孔结构的第二层，同时限定所述第一层和所述第二层叠设且固定连接，因多微孔结构具备较大的声阻尼，可以有效降低前腔谐振峰的能量，降低失真的同时减小高频谐振对噪声的放大作用；通过设置所述第一层相对于所述第二层更靠近所述音圈，以利用所述第二层的多微孔结构调整所述扬声器内的声阻尼，吸收高频谐振的能量，降低谐振区域频段的灵敏度及失真，同时降低谐振峰对噪声的放大作用，起到优化所述扬声器的声学性能和重放效果的目的；通过设置所述第二层相对于所述第一层更靠近所述音圈，使得所述扬声器内的气流除常规路径外还可以经多微孔结构流动，且多微孔结构内部间隙内的空气具有较强的阻尼，同样可以用于吸收高频噪声。
 附图说明
为了更清楚地说明本申请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申请的一些实施例，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为相关技术的扬声器中气体流动的平面结构示意图；
图2为本申请提供的扬声器的立体结构示意图；
图3为本申请实施例一提供的扬声器的振动系统的平面结构示意图；
图4为本申请实施例二提供的扬声器的振动系统的平面结构示意图。
 本发明的最佳实施方式
下面将结合本申请实施例中的附图，对本申请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申请的一部分实施例，而不是全部的实施例。基于本申请中的实施例，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，都属于本申请保护的范围。
实施例一
请同时参阅图2和图3，所述扬声器100包括盆架11、分别固定于所述盆架11的振动系统13及磁路系统15。
所述振动系统13包括固定于所述盆架11的振膜131及驱动所述振膜131振动发声的音圈133球顶1311。
所述振膜131包括球顶1311、与所述球顶1311连接的振动部1313、自所述振动部1313向外延伸的折环部1315及自所述折环部1315继续向外延伸的固定部1317。所述固定部1317与所述盆架11固定连接，从而使得所述振膜131固定于所述盆架11。
所述球顶1311包括第一层13111及多微孔结构的第二层13113。其中，所述第一层13111和所述第二层13113叠设且固定连接。
所述第二层13113的多微孔结构具备较大的声阻尼，可以有效降低前腔谐振峰的能量，降低失真的同时减小高频谐振对噪声的放大作用。
具体的，所述第一层13111为铝箔层，所述第二层13113由具有多微孔结构的发泡金属材料制成。如发泡铝、发泡镍等。在本实施方式中，所述第二层13113的材料为发泡铝。
优选的，所述第一层13111的厚度与所述第二层1351的厚度相同。
同时，在本实施方式中，所述第一层13111相对于所述第二层13113更靠近所述音圈133，且所述第一层13111与所述振动部1313固定连接。也就是说，所述第二层13113位于所述第一层13111之上，以利用所述第二层13113的多微孔结构调整所述扬声器100内的声阻尼，吸收高频谐振的能量，降低谐振区域频段的灵敏度及失真，同时降低谐振峰对噪声的放大作用，起到优化所述扬声器100的声学性能和重放效果的目的。
需要说明的是，上述“第二层13113位于所述第一层13111之上”的位置关系描述是基于图3进行的，当所述扬声器100发生旋转、翻转等变化时，所述第二层13113与所述第一层13111之间的位置关系也应该进行相应变化。
实施例二
请参阅图4，本实施例提供的所述扬声器与实施例一提供的扬声器100的结构基本相同，其不同点在于所述第一层23111与所述第二层23113的位置关系。
在本实施例中，所述第二层23113相对于所述第一层23111更靠近所述音圈233，且所述第二层23113与所述振动部固定连接。
相较于相关技术的扬声器，本实施例提供的所述扬声器内的气流除常规路径外还可以经多微孔结构流动，且多微孔结构内部间隙内的空气具有较强的阻尼，同样可以用于吸收高频噪声。
与相关技术相比，本申请的扬声器通过设置所述球顶包括第一层及多微孔结构的第二层，同时限定所述第一层和所述第二层叠设且固定连接，因多微孔结构具备较大的声阻尼，可以有效降低前腔谐振峰的能量，降低失真的同时减小高频谐振对噪声的放大作用；通过设置所述第一层相对于所述第二层更靠近所述音圈，以利用所述第二层的多微孔结构调整所述扬声器内的声阻尼，吸收高频谐振的能量，降低谐振区域频段的灵敏度及失真，同时降低谐振峰对噪声的放大作用，起到优化所述扬声器的声学性能和重放效果的目的；通过设置所述第二层相对于所述第一层更靠近所述音圈，使得所述扬声器内的气流除常规路径外还可以经多微孔结构流动，且多微孔结构内部间隙内的空气具有较强的阻尼，同样可以用于吸收高频噪声。
以上所述的仅是本申请的实施方式，在此应当指出，对于本领域的普通技术人员来说，在不脱离本申请创造构思的前提下，还可以做出改进，但这些均属于本申请的保护范围。
 本发明的实施方式
在此处键入本发明的实施方式描述段落。
 工业实用性
在此处键入工业实用性描述段落。
 序列表自由内容
在此处键入序列表自由内容描述段落。

Claims (10)

  1. 一种扬声器，包括盆架、分别固定于所述盆架的振动系统及磁路系统，所述振动系统包括固定于所述盆架的振膜及驱动所述振膜振动发声的音圈，所述振膜包括球顶，其特征在于，所述球顶包括第一层及多微孔结构的第二层，所述第一层和所述第二层叠设且固定连接。
  2. 根据权利要求1所述的扬声器，其特征在于，所述第一层相对于所述第二层更靠近所述音圈。
  3. 根据权利要求2所述的扬声器，其特征在于，所述振膜还包括与所述球顶连接的振动部、自所述振动部向外延伸的折环部及自所述折环部继续向外延伸的固定部，所述第一层与所述振动部固定连接。
  4. 根据权利要求1所述的扬声器，其特征在于，所述第二层相对于所述第一层更靠近所述音圈。
  5. 根据权利要求4所述的扬声器，其特征在于，所述振膜还包括与所述球顶连接的振动部、自所述振动部向外延伸的折环部及自所述折环部继续向外延伸的固定部，所述第二层与所述振动部固定连接。
  6. 根据权利要求1所述的扬声器，其特征在于，所述第二层由具有多微孔结构的发泡金属材料制成。
  7. 根据权利要求6所述的扬声器，其特征在于，所述第二层的材料为发泡铝或发泡镍。
  8. 根据权利要求1所述的扬声器，其特征在于，所述第一层为铝箔层。
  9. 根据权利要求1所述的扬声器，其特征在于，所述第一层的厚度与所述第二层的厚度相同。
  10. 在此处键入权利要求项10。
PCT/CN2019/094016 2019-06-29 2019-06-29 扬声器 WO2021000118A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2019/094016 WO2021000118A1 (zh) 2019-06-29 2019-06-29 扬声器
CN201921031390.3U CN210093484U (zh) 2019-06-29 2019-07-02 扬声器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2019/094016 WO2021000118A1 (zh) 2019-06-29 2019-06-29 扬声器

Publications (1)

Publication Number Publication Date
WO2021000118A1 true WO2021000118A1 (zh) 2021-01-07

Family

ID=69484554

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/094016 WO2021000118A1 (zh) 2019-06-29 2019-06-29 扬声器

Country Status (2)

Country Link
CN (1) CN210093484U (zh)
WO (1) WO2021000118A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230247347A1 (en) * 2022-01-25 2023-08-03 Harman International Industries, Incorporated Noise-reducing loudspeaker

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111711890A (zh) * 2020-06-24 2020-09-25 歌尔股份有限公司 球顶、扬声器单体和发声装置
CN112188372B (zh) * 2020-09-23 2022-04-29 瑞声新能源发展(常州)有限公司科教城分公司 扬声器及电子设备
CN112188373B (zh) * 2020-09-23 2022-04-29 瑞声新能源发展(常州)有限公司科教城分公司 扬声器及电子设备
CN113473334B (zh) * 2021-06-29 2022-11-01 歌尔股份有限公司 发声单体、扬声器组件以及电子设备

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102026060A (zh) * 2010-12-24 2011-04-20 瑞声声学科技(深圳)有限公司 振膜及其制作方法
CN203219479U (zh) * 2013-05-06 2013-09-25 厦门东声电子有限公司 一种手机用扬声器振膜
US20160330549A1 (en) * 2014-01-07 2016-11-10 Innovation Sound Technology Co., Ltd Speaker Diaphragms and Speakers with the Same
CN205754825U (zh) * 2016-05-05 2016-11-30 歌尔股份有限公司 一种球顶结构及发声装置的振膜组件
CN208337866U (zh) * 2018-04-17 2019-01-04 东莞涌韵音膜有限公司 三维多层音膜

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102026060A (zh) * 2010-12-24 2011-04-20 瑞声声学科技(深圳)有限公司 振膜及其制作方法
CN203219479U (zh) * 2013-05-06 2013-09-25 厦门东声电子有限公司 一种手机用扬声器振膜
US20160330549A1 (en) * 2014-01-07 2016-11-10 Innovation Sound Technology Co., Ltd Speaker Diaphragms and Speakers with the Same
CN205754825U (zh) * 2016-05-05 2016-11-30 歌尔股份有限公司 一种球顶结构及发声装置的振膜组件
CN208337866U (zh) * 2018-04-17 2019-01-04 东莞涌韵音膜有限公司 三维多层音膜

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230247347A1 (en) * 2022-01-25 2023-08-03 Harman International Industries, Incorporated Noise-reducing loudspeaker

Also Published As

Publication number Publication date
CN210093484U (zh) 2020-02-18

Similar Documents

Publication Publication Date Title
WO2021000118A1 (zh) 扬声器
US7106878B2 (en) Speaker and mobile terminal device
CN203574855U (zh) 扬声器模组
US9154883B2 (en) Low rise speaker assembly having a dual voice coil driver
TW200539725A (en) Speaker, module using the same, electronic equipment and device, and speaker producing method
US20120121121A1 (en) Speaker having a horizontal former
WO2020140544A1 (zh) 发声器件
WO2021174569A1 (zh) 扬声器
US11765517B2 (en) Sound production unit and speaker
WO2021000119A1 (zh) 扬声器
CN103414985A (zh) 微型扬声器的悬挂结构
WO2022068082A1 (zh) 发声器及包括该发声器的电子产品
WO2021000117A1 (zh) 扬声器
WO2017161748A1 (zh) 一种用户终端
JPH10257589A (ja) 振動板及びこの振動板を備えるマイクロホン装置
CN203896502U (zh) 压电型扬声器
CN202721816U (zh) 双凹面薄型扬声器
WO2024045234A1 (zh) 电路及发声器件
WO2024026989A1 (zh) 一种扬声器以及电子设备
CN208143481U (zh) 一种静电式电声换能器
JP2009094914A (ja) スピーカ
KR100769885B1 (ko) 전자음향변환기
JP2021010155A (ja) 超音波によるスピーカーの歪低減方式
JP2009094912A (ja) スピーカ
CN217849657U (zh) 一种振膜组件

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19936036

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19936036

Country of ref document: EP

Kind code of ref document: A1