An acoustic-electric transducer, a system, and a noise reduction method

Abstract

The invention relates to an acoustoelectric transducer, a system and a noise reduction method. The acoustoelectric transducer comprises a vibration system, the vibration system at least comprises a first voice coil, a first vibrating diaphragm component and a second vibrating diaphragm component, the first vibrating diaphragm component and the second vibrating diaphragm component each comprise an axial first end and an axial second end, and the axial first end of the first vibrating diaphragm component is connected with the first voice coil; a first magnetic circuit system configured to provide a first magnetic field; the auxiliary system is used for fixing the first vibrating diaphragm component and the second vibrating diaphragm component and is fixed with the first magnetic circuit system; the second ends of the first vibrating diaphragm component and the second vibrating diaphragm component are oppositely arranged, and the first voice coil is configured to vibrate when a current signal flows through the first voice coil, so that the vibration directions of the first vibrating diaphragm component and the second vibrating diaphragm component are the same to reduce air resistance in the resonance process. According to the scheme provided by the invention, the resonant frequency of the loudspeaker can be reduced while the volume of the sound box body is kept small, so that the active noise reduction effect of the loudspeaker can be effectively improved.

Description

(19) State Intellectual Property Office (12) Invention Patent Application (10) Application Publication Number (43) Application Publication Date (21) Application Number 202511518613.9 (22) Application Date 2025.10.22 (71) Applicant Shanghai Shengyin Technology Co., Ltd. Address No. 3, Lane 889, Suide Road, Putuo District, Shanghai 200331 (72) Inventors Chen Lijun, Ye Chunyan, Zhang Shanshan (74) Patent Agency Beijing King & Wood Mallesons 11256 Patent Attorney Lin Ke, Ma Tao (51) Int.Cl. (2006.01) (2006.01) (54) Invention Title Acoustic-Electro-Transducer, System and Noise Reduction Method (57) Abstract This disclosure relates to an acoustic-electro-transducer, system and noise reduction method. The acoustic-electric transducer includes: a vibration system comprising at least a first voice coil, a first diaphragm component, and a second diaphragm component, both the first and second diaphragm components including an axial first end and a second end, the axial first end of the first diaphragm component being connected to the first voice coil; a first magnetic circuit system configured to provide a first magnetic field; and an auxiliary system for fixing the first and second diaphragm components and being fixed to the first magnetic circuit system; the second ends of the first and second diaphragm components are disposed opposite to each other, and the first voice coil is configured to vibrate when a current signal flows through the first voice coil, such that the vibration directions of the first and second diaphragm components are the same to reduce air resistance during resonance. The solution disclosed herein can reduce the resonant frequency of the loudspeaker while maintaining a compact speaker enclosure size, thereby effectively improving the active noise cancellation effect of the loudspeaker. Claims 2 pages, Description 12 pages, Drawings 18 pages, CN121310045A 2026.01.09 CN 12 13 10 04 5 A 1. An acoustic-electric transducer, characterized in that it comprises: a vibration system, the vibration system comprising at least a first voice coil, a first diaphragm component, and a second diaphragm component, the first diaphragm component and the second diaphragm component each comprising an axial first end and a second end, the axial first end of the first diaphragm component being connected to the first voice coil; a first magnetic circuit system configured to provide a first magnetic field; and an auxiliary system for fixing the first diaphragm component and the second diaphragm component, and fixed to the first magnetic circuit system; the second ends of the first diaphragm component and the second diaphragm component are disposed opposite to each other, the first voice coil being configured to vibrate when a current signal flows through the first voice coil, such that the vibration directions of the first diaphragm component and the second diaphragm component are the same to reduce air resistance during the resonance process. 2. The acoustic-electric transducer according to claim 1, characterized in that the dimension of the first axial first end of each of the first diaphragm component and the second diaphragm component is smaller than the dimension of the second axial end, the first diaphragm component and the second diaphragm component are configured to be coaxially opposite each other at their respective second axial ends to form a closed space, utilizing the first diaphragm component and the diaphragm component vibrating in the same direction.3. The acoustic-electric transducer according to claim 1, wherein the vibration system further includes a second voice coil, the second voice coil being fixedly connected to the axial first end of the second diaphragm component, the second voice coil being configured to vibrate when a current signal flows through the second voice coil, thereby at least driving the second diaphragm component to vibrate. 4. The acoustic-electric transducer according to claim 3, wherein the direction of the current signal flowing through the first voice coil is adapted to the direction of the current signal flowing through the second voice coil, so that the vibration directions of the first and second voice coils are consistent. 5. The acoustic-electric transducer according to claim 2, further comprising: an inner diaphragm support unit, disposed within the space defined by the first and second diaphragm components, and fixed relative to the first and second diaphragm components. 6. The acoustic-electric transducer according to claim 5, wherein the inner diaphragm support unit is a ring structure, the ring structure having multiple coupling parts, the multiple coupling parts being configured to couple with multiple counterweight units respectively, so as to reduce the resonant frequency. 7. The acoustic-electric transducer according to claim 6, wherein the coupling part is any one of an opening, a snap-fit, and a thread, and the counterweight unit is a mass block. 8. The acoustic-electric transducer according to claim 3, further comprising: a second magnetic circuit system, wherein the first magnetic circuit system and the second magnetic circuit system are configured to provide magnetic fields with mutually compatible magnetic field directions, such that the vibration directions of the first voice coil and the second voice coil are the same. 9. The acoustic-electric transducer according to claim 1, wherein the first magnetic circuit system includes a magnetic ring, and the first voice coil passes through a hole in the magnetic ring; the auxiliary system includes: a first frame fixed to the first magnetic circuit system; and a fixing unit disposed at the end of the first frame for fixing the first diaphragm component and the second diaphragm component together. 10. The acoustic-electric transducer according to claim 8, wherein the auxiliary system includes: a first frame fixed to the first magnetic circuit system; and a second frame fixed to the second magnetic circuit system, the second frame and the first frame being coupled via a support member. 11. The acoustic-electric transducer according to claim 1, characterized in that the first diaphragm component includes a first diaphragm, the second diaphragm component includes a second diaphragm, and the first diaphragm component and the second diaphragm component are coupled; or the first diaphragm component and the second diaphragm component are integrally formed. 12. The acoustic-electric transducer according to claim 3, characterized in that it further comprises: a housing coupled to an auxiliary system, wherein at least the first voice coil, the first diaphragm component, and the first magnetic circuit system are housed within the space defined by the housing; and a power supply device for providing a current signal. 13. An acoustic-electric transducer system, characterized in that it comprises:A first acoustic-electric transducer, comprising a first voice coil and a first diaphragm component, the first diaphragm component comprising an axial first end and an axial second end, the axial first end of the first diaphragm component being fixedly connected to the first voice coil, the dimension of the axial first end being smaller than the dimension of the axial second end; and a second acoustic-electric transducer, comprising a second voice coil and a second diaphragm component, the second diaphragm component comprising an axial first end and an axial second end, the axial first end of the second diaphragm component being fixedly connected to the second voice coil, the axial second ends of the first diaphragm component and the second diaphragm component being coaxially opposite each other, the first voice coil and the second voice coil being configured such that when current flows through the first voice coil and the second voice coil, the vibration directions of the first diaphragm component and the second diaphragm component are the same; the first diaphragm component comprises a first diaphragm, the second diaphragm component comprises a second diaphragm, the first diaphragm component and the second diaphragm component are coupled; or the first diaphragm component and the second diaphragm component are integrally formed. 14. A noise reduction method, characterized in that the noise reduction method is implemented using a noise reduction device, the noise reduction device comprising an acoustic-electric transducer according to any one of claims 1 to 12 or an acoustic-electric transducer system according to claim 13, the method comprising: placing at least one of the noise reduction devices in a target area of ​​the place to be noise-reduced; and supplying power to the noise reduction device to implement noise reduction; wherein the target area includes at least one of the following: a noise source; a propagation path; and a noise receiving point. 15. The noise reduction method according to claim 14, characterized in that the place to be noise-reduced includes at least one of the following: traffic facilities; factories; construction sites; shopping malls; public entertainment venues; and medical venues. Claims 2 / 2 Page 3 CN121310045A Acoustic-electric transducer, system and noise reduction method Technical Field

[0001] The embodiments of this disclosure generally relate to the field of acoustics and electricity, and more specifically to an acoustic-electric transducer, system and noise reduction method. Background Art

[0002] In open active noise cancellation systems, the diaphragm in the speaker enclosure is usually a single-diaphragm speaker. However, the introduction of a single-diaphragm speaker will lead to an increase in the resonant frequency. In order to reduce the resonant frequency and improve the noise cancellation effect, the method of increasing the diaphragm mass is usually adopted, but the power amplifier power needs to be increased accordingly, otherwise the volume will be too low and the noise cancellation effect will be poor. Summary of the Invention

[0003] In view of the above problems, this disclosure provides an acoustic-electric transducer, a system and a noise reduction method, which can not only reduce the resonant frequency of the speaker while keeping the speaker enclosure small, but also effectively improve the active noise cancellation effect of the speaker.

[0004] According to a first aspect of this disclosure, an acoustic-electric transducer is provided, which includes: a vibration system, the vibration system including at least a first voice coil, a first diaphragm component and a second diaphragm component, the first diaphragm component and the second diaphragmThe components are configured to be coaxially opposite each other at their respective axial second ends. The dimensions of the first axial first ends of the first diaphragm component and the second diaphragm component are smaller than the dimensions of their respective axial second ends. The first axial first end of the first diaphragm component is fixedly connected to a first voice coil, which is configured to vibrate when a current signal flows through the first voice coil, such that the vibration directions of the first diaphragm component and the second diaphragm component are the same. A first magnetic circuit system is configured to provide a first magnetic field. An auxiliary system is used to fix the first diaphragm component and the second diaphragm component and is fixed to the first magnetic circuit system.

[0005] In some embodiments, the first diaphragm component and the second diaphragm component are configured to be coaxially opposite each other at their respective axial second ends to form a closed space. The first diaphragm component and the second diaphragm component vibrating in the same direction form an "air spring" structure to reduce the resonant frequency of the acoustic transducer.

[0006] In some embodiments, the vibration system further includes a second voice coil, which is fixedly connected to the axial first end of the second diaphragm component. The second voice coil is configured to vibrate when a current signal flows through the second voice coil, thereby at least driving the second diaphragm component to vibrate.

[0007] In some embodiments, the direction of the current signal flowing through the first voice coil is adapted to the direction of the current signal flowing through the second voice coil, so that the vibration directions of the first and second voice coils are consistent.

[0008] In some embodiments, the acoustic-electric transducer further includes: an inner diaphragm support unit disposed within the space defined by the first and second diaphragm components, and fixed relative to the first and second diaphragm components.

[0009] In some embodiments, the inner diaphragm support unit is a ring structure, the ring structure having a plurality of coupling portions, the plurality of coupling portions being configured to be coupled to a plurality of counterweight units respectively, so as to reduce the resonant frequency.

[0010] In some embodiments, the coupling portion is any one of an opening, a snap-fit, and a thread, and the counterweight unit is a mass block.

[0011] In some embodiments, the acoustic-electric transducer further includes: a second magnetic circuit system, the first and second magnetic circuit systems being configured to provide magnetic fields with magnetic field directions adapted to each other, so that the vibration directions of the first and second voice coils are the same. Instruction Manual, Page 1 / 12, 4 CN121310045A

[0012] In some embodiments, the first magnetic circuit system includes a magnetic ring, and a first voice coil passes through a hole in the magnetic ring; the auxiliary system includes: a first frame, fixed to the first magnetic circuit system; and a fixing unit, disposed on the end of the first frame, for fixing the first diaphragm component and the second diaphragm component together.

[0013] In some embodiments, the first diaphragm component includes a first diaphragm, the second diaphragm component includes a second diaphragm, and the first diaphragm component and the second diaphragm component are coupled; or the first diaphragm component and the second diaphragm component are integrally formed.

[0014] In some embodiments, the acoustic-electric transducer further includes: a housing, coupled to the auxiliary system, at least the first voice coil,The first diaphragm component and the first magnetic circuit system are housed within the space defined by the housing; and a power supply device is used to provide a current signal.

[0015] In some embodiments, the auxiliary system includes: a first basin frame fixed to the first magnetic circuit system; and a second basin frame fixed to the second magnetic circuit system, the second basin frame and the first basin frame being coupled via a support member.

[0016] According to a second aspect of the present disclosure, an acoustic-electric transducer system is also provided, comprising: a first loudspeaker, the first loudspeaker including a first voice coil and a first diaphragm component, the first diaphragm component including an axial first end and an axial second end, the axial first end of the first diaphragm component being fixedly connected to the first voice coil, the size of the axial first end being smaller than the size of the axial second end; and a second loudspeaker, the second loudspeaker including a second voice coil and a second diaphragm component, the second diaphragm component including an axial first end and an axial second end, the axial first end of the second diaphragm component being fixedly connected to the second voice coil, the axial second end of the first diaphragm component and the axial second end of the second diaphragm component being coaxially opposite to each other, the first voice coil and the second voice coil being configured such that when current flows through the first voice coil and the second voice coil, the vibration directions of the first diaphragm component and the second diaphragm component are the same; the first diaphragm component includes a first diaphragm, the second diaphragm component includes a second diaphragm, the first diaphragm component and the second diaphragm component are coupled; or the first diaphragm component and the second diaphragm component are integrally formed.

[0017] According to a second aspect of the present disclosure, a noise reduction method is provided. The noise reduction method utilizes a noise reduction device, which includes an acoustic-electric transducer according to a first aspect of the present disclosure or an acoustic-electric transducer system according to a second aspect of the present disclosure. The method includes: placing at least one of the noise reduction devices in a target area of ​​the location to be noise-reduced; and supplying power to the noise reduction device to implement noise reduction; wherein the target area includes at least one of the following: a noise source; a propagation path; and a noise receiving point.

[0018] In some embodiments, the location to be noise-reduced includes at least one of the following: transportation facilities; factories; construction sites; shopping malls; public entertainment venues; and medical venues.

[0019] According to the technical solution of the present disclosure, a first diaphragm component and a second diaphragm component are configured to be coaxially opposite each other at their respective axial second ends. The size of the first axial first end of each of the first diaphragm component and the second diaphragm component is smaller than the size of its axial second end. The first axial first end of the first diaphragm component is fixedly connected to a first voice coil, which is configured to vibrate when a current signal flows through it, such that the vibration directions of the first diaphragm component and the second diaphragm component are the same. Among them, based on the shape characteristics of the first diaphragm component and the second diaphragm component, the air resistance during the resonance process is significantly reduced, and the effective volume of the space enclosed by the first diaphragm component and the second diaphragm component is larger. The first diaphragm component and the second diaphragm component form an "air spring" structure, thereby effectively reducing the resonant frequency of the acoustic transducer.

[0020] It should be understood that the content described in this section is not intended to identify key or important features of the embodiments of this disclosure, nor is it intended to limit the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Brief Description of the Drawings

[0021] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. In the drawings, the same or similar reference numerals denote the same or similar elements. Description 2 / 12 pages 5 CN121310045A

[0022] FIG1 shows a schematic diagram of an acoustic-electric transducer according to an embodiment of this disclosure.

[0023] FIG2 shows an exploded schematic diagram of an acoustic-electric transducer according to an embodiment of this disclosure.

[0024] FIG3 shows a schematic diagram of a first diaphragm component and a second diaphragm component according to an embodiment of this disclosure.

[0025] FIG4 shows a schematic diagram of a first diaphragm component and a second diaphragm component according to an embodiment of this disclosure.

[0026] FIG5 shows a schematic diagram of a first diaphragm component and a second diaphragm component according to an embodiment of this disclosure.

[0027] FIG6 shows a schematic diagram of the first diaphragm component and the second diaphragm component according to an embodiment of the present disclosure.

[0028] FIG7 shows a schematic diagram of the first diaphragm component and the second diaphragm component according to an embodiment of the present disclosure.

[0029] FIG8 shows a schematic diagram of the first diaphragm component and the second diaphragm component according to an embodiment of the present disclosure.

[0030] FIG9 shows a schematic diagram of the first diaphragm component and the second diaphragm component according to an embodiment of the present disclosure.

[0031] FIG10 shows a schematic diagram of the first diaphragm component and the second diaphragm component according to an embodiment of the present disclosure.

[0032] FIG11 shows a schematic diagram of the first diaphragm component and the second diaphragm component according to an embodiment of the present disclosure.

[0033] FIG12 shows a schematic diagram of the first diaphragm component and the second diaphragm component according to an embodiment of the present disclosure.

[0034] FIG13 shows a schematic diagram of the resonant frequency waveform of an acoustic-electric transducer.

[0035] FIG14 shows a schematic diagram of the resonant frequency waveform of an acoustic-electric transducer according to an embodiment of the present disclosure.

[0036] FIG15 shows a schematic diagram of the resonant frequency waveform of an acoustic-electric transducer.

[0037] FIG16 shows a schematic diagram of an acoustic-electric transducer according to an embodiment of the present disclosure.

[0038] FIG17 shows an exploded view of an acoustic-electric transducer according to an embodiment of the present disclosure.

[0039] FIG18 shows a schematic diagram of the resonant frequency waveform of a first configuration of an acoustic-electric transducer according to an embodiment of the present disclosure.

[0040] FIG19 shows a schematic diagram of the resonant frequency waveform of a second configuration of an acoustic-electric transducer according to an embodiment of the present disclosure.

[0041] FIG20 shows a schematic diagram of the resonant frequency waveform of a third configuration of an acoustic-electric transducer according to an embodiment of the present disclosure.

[0042] FIG21 shows a schematic diagram of an acoustic-electric transducer system according to an embodiment of the present disclosure.

[0043] Figure 22 shows an exploded view of an acoustic-electric transducer system according to an embodiment of the present disclosure.

[0044] Figure 23 shows a block diagram of an electronic device according to an embodiment of the present disclosure. Detailed Description

[0045] Exemplary embodiments of the present disclosure are described below with reference to the accompanying drawings, including various details of the embodiments of the present disclosure to aid understanding, and should be considered merely exemplary. Therefore, those skilled in the art should recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present disclosure. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0046] The term “comprising” and its variations as used herein indicate an open-ended inclusion, i.e., “including but not limited to”. Unless specifically stated otherwise, the term “or” means “and / or”. The term “based on” means “at least partially based on”. The terms “one example embodiment” and “one embodiment” mean “at least one example embodiment”. The term “another embodiment” means “at least one additional embodiment”. The terms “first,” “second,” etc., may refer to different or the same objects. Other explicit and implicit definitions may also be included below.

[0047] As described above, traditional active noise cancellation methods are typically implemented using both software and hardware solutions. At the software level, the active noise cancellation system collects ambient noise and generates a sound wave signal with the opposite phase (i.e., a phase difference of 180°) to the captured noise. This reverse sound wave signal cancels out the noise signal, thus achieving noise cancellation. However, various algorithms used in generating the reverse sound wave signal cannot overcome the inherent defects in the speaker structure. Since the speaker is a spring-loaded oscillator system, the phase of the sinusoidal excitation starts at 0° at low frequencies, passes through the resonant point of 90°, and gradually approaches 180° as the frequency increases. Low-frequency signals, due to their lower energy, require a larger sound wave amplitude and a longer sound wave path to ensure complete signal transmission. Therefore, only when the input signal frequency of the low-frequency speaker is about three times the system resonant frequency can the phase difference between the input and output signals of the low-frequency speaker approach 180°, thereby achieving the noise reduction effect. However, excessively high frequency input signals can cause mid-to-high frequency feedback.

[0048] At the hardware level, active noise cancellation methods typically reduce the resonant frequency by increasing the mass of the single diaphragm in the speaker. Increasing the diaphragm mass in the speaker may cause the low-frequency signal to have insufficient energy to resonate. Therefore, it is necessary to further increase the power amplifier to reduce the resonant frequency while ensuring audio resonance, thereby achieving the active noise cancellation effect. However, increasing the power amplifier requires a corresponding increase in the volume of the speaker enclosure; otherwise, it will cause the speaker to overheat and burn out, which further limits the application scenarios of the active noise cancellation system.

[0049] In summary, the shortcomings of traditional active noise cancellation methods lie in the difficulty of reducing the resonant frequency of low-frequency loudspeakers without increasing the volume of the loudspeaker enclosure, thus making it difficult to actively reduce low-frequency noise.

[0050] To at least partially solve one or more of the above-mentioned problems and other potential problems, an example embodiment of this disclosure proposes an acoustic-electric transducer. In this acoustic-electric transducer, a first diaphragm component and a second diaphragm component are arranged opposite each other in the coaxial direction. Compared with a traditional single-diaphragm loudspeaker, by setting the size of the first axial segment of each of the first and second diaphragm components to be smaller than the size of the second axial segment, the air resistance during the resonance process is significantly reduced, and the effective volume of the space enclosed by the first and second diaphragm components is larger (an increase in effective volume can reduce the resonant frequency, and a smaller effective volume results in a higher resonant frequency). The first and second diaphragm components form an "air spring" structure, thereby reducing the resonant frequency of the acoustic-electric transducer. This acoustic-electric transducer, for example, when applied to a loudspeaker, can actively reduce low-frequency noise without increasing the volume of the loudspeaker enclosure. In addition, this disclosure achieves a dual magnetic circuit system by fixing the second voice coil in the first axial segment of the second diaphragm component. When the dual magnetic circuit system is switched on in reverse for power amplification, the consistency of the movement direction of the first diaphragm component and the second diaphragm component is improved, further reducing the resonant frequency of the speaker. Furthermore, this disclosure also provides an internal diaphragm support unit that can be coupled to the breeding unit between the first diaphragm component and the second diaphragm component, so that corresponding counterweights can be added according to usage requirements, further reducing the resonant frequency while maintaining the compact size of the speaker, thereby significantly improving the active noise reduction effect of the speaker.

[0051] The following describes the embodiments of this disclosure in conjunction with the accompanying drawings.

[0052] FIG1 shows a schematic diagram of an acoustic-electric transducer 100 according to an embodiment of this disclosure. FIG2 shows an exploded schematic diagram of an acoustic-electric transducer 100 according to an embodiment of this disclosure. It should be understood that the acoustic-electric transducer 100 may also include additional components not shown and / or the components shown may be omitted, and the scope of this disclosure is not limited in this respect.

[0053] The acoustic-electric transducer 100 is, for example, a single magnetic circuit acoustic-electric transducer. The acoustic-electric transducer 100 can be applied, for example, to a loudspeaker. The acoustic-electric transducer 100 is, for example, a loudspeaker. The acoustic-electric transducer 100 may have a vibration system 102, a first magnetic circuit system 104, and an auxiliary system 103. The vibration system 102 is fixedly connected to the first magnetic circuit system 104 through the auxiliary system 103. Under the action of the magnetic field of the first magnetic circuit system 104, the vibration system 102 is subjected to force and vibrates, which drives the diaphragm in the vibration system 102 to vibrate. The diaphragm then pushes the air molecules inside the loudspeaker to amplify the sound.

[0054] Regarding the vibration system 102, it includes at least a first voice coil 121, a first diaphragm component 122, and a second diaphragm component.123. The first diaphragm component 122 and the second diaphragm component 123 have, for example, a first end and a second end along their respective axial directions. For ease of explanation, the positive X-axis direction is shown by arrows in the figure, and the axial directions of the first diaphragm component 122 and the second diaphragm component 123 are, for example, arranged along the X-axis direction. For example, the first end of the first diaphragm component 122 is disposed on the negative X-axis side relative to the second end, and the first end of the second diaphragm component 123 is disposed on the positive X-axis side relative to the second end. The first diaphragm component 122 and the second diaphragm component 123 are configured to be coaxially opposite each other at their respective axial second ends. The dimensions of the first axial ends of the first diaphragm component 122 and the second diaphragm component 123 are smaller than the dimensions of their respective axial second ends. The first axial end of the first diaphragm component 122 is fixedly connected to the first voice coil 121. The first voice coil 121 is configured to vibrate when a current signal flows through it, such that the vibration directions of the first diaphragm component 122 and the second diaphragm component 123 are the same. The first diaphragm component 122 and the second diaphragm component 123 are, for example, horn-shaped diaphragms.

[0055] Regarding the first magnetic circuit system 104, it is configured to provide a first magnetic field. The first magnetic circuit system 104 includes, for example, a first magnetic ring 141 and a first T-iron 142. The hole in the first magnetic ring 141 is used to accommodate the first voice coil 121. The first T-shaped iron 142 is used to fix the first magnetic ring 141, the first voice coil 121, and the auxiliary system 103.

[0056] Regarding the auxiliary system 103, it includes, for example, a first frame 131 and a fixing unit 132. The first frame 132 is fixed to the first magnetic circuit system; the fixing unit 132 is disposed on the end of the first frame 131 and is used to fix the first diaphragm component 122 and the second diaphragm component 123 together.

[0057] In some embodiments, the first diaphragm component 122 is a first diaphragm, and the second diaphragm component 123 is a second diaphragm. That is, the first diaphragm component 122 and the second diaphragm component 123 are two independent diaphragms. The first diaphragm component 122 and the second diaphragm component 123 are, for example, attached to each other to surround a space. The fixing unit 132 clamps, for example, the attachment point of the first diaphragm component 122 and the second diaphragm component 123 to fix the first diaphragm component 122 and the second diaphragm component 123 together. In some embodiments, the first diaphragm component 122 and the second diaphragm component 123 are bonded together, for example, with adhesive. The fixing unit 132 is, for example, a folded edge. The contact points between the fixing unit 132 and the first diaphragm component 122 and the second diaphragm component 123 are, for example, bonded together with adhesive.

[0058] The auxiliary system 103 also includes, for example, a first washer 134 and a first spring wave 136. The first spring wave 136 is, for example, disposed on...The end of the first frame 131 away from the fixing unit 132. The first washer 134 is attached to the first spider 136, for example. The first voice coil 121 is in contact with the first diaphragm component 122, for example, through the hole in the first washer 134 and the hole in the first spider 136. In some embodiments, the first voice coil 121 and the first diaphragm component 122 are fixed together, for example, with glue. In some embodiments, the first voice coil 121 and the first diaphragm component 122 may be integrally wound together to be fixedly connected to each other. In some embodiments, the first voice coil 121 and the first diaphragm component 122 may be fixed together by an intermediate structure, for example, using an intermediate fixing structure.

[0059] FIG3 shows a schematic diagram of the first diaphragm component and the second diaphragm component according to an embodiment of the present disclosure. The first diaphragm component 122 and the second diaphragm component 123 are, for example, hemispherical, and the first diaphragm component 122 and the second diaphragm component 123, after being joined together, for example, surround a spherical space.

[0060] FIG4 shows a schematic diagram of a first diaphragm component and a second diaphragm component according to an embodiment of the present disclosure. The first diaphragm component 122 and the second diaphragm component 123 are, for example, semi-ellipsoidal, and after docking, the first diaphragm component 122 and the second diaphragm component 123 surround an ellipsoidal space, for example.

[0061] FIG5 shows a schematic diagram of a first diaphragm component and a second diaphragm component according to an embodiment of the present disclosure. The first diaphragm component 122 and the second diaphragm component 123 are, for example, semi-ellipsoidal, and after docking, the first diaphragm component 122 and the second diaphragm component 123 surround an ellipsoidal space, for example.

[0062] FIG6 shows a schematic diagram of a first diaphragm component and a second diaphragm component according to an embodiment of the present disclosure. The first diaphragm component 122 and the second diaphragm component 123 are, for example, conical, and after docking, the first diaphragm component 122 and the second diaphragm component 123 surround a space, for example. In some embodiments, the first diaphragm component 122 and the second diaphragm component 123 are, for example, square pyramidal.

[0063] FIG7 shows a schematic diagram of a first diaphragm component and a second diaphragm component according to an embodiment of the present disclosure. The first diaphragm component 122 and the second diaphragm component 123 are, for example, horn-shaped, and the first diaphragm component 122 and the second diaphragm component 123, after being connected to the specification page 5 / 12 8 CN121310045A, for example, surround a space.

[0064] In the above figures, the first diaphragm component 122 and the second diaphragm component 123 are, for example, symmetrical shapes, and have the same shape and size.

[0065] In some embodiments, the first diaphragm component 122 and the second diaphragm component 123 are, for example, asymmetrical. For example, the first length L1 of the first diaphragm component 122 extending along the direction of the sound field (e.g., the direction corresponding to the X-axis) is, for example, not equal to the second length L2 of the first diaphragm component 122 extending along the direction of the sound field. In some embodiments, for example, the first length L1 of the first diaphragm component 122 extending along the direction of the sound field is, for example, not equal to the second length L2 of the first diaphragm component 122 extending along the direction of the sound field.A first length L1 is greater than a second length L2. In some embodiments, the first length L1 is less than the second length L2.

[0066] In some embodiments, the first diaphragm component 122 and the second diaphragm component 123 are, for example, asymmetrical. For example, the size of the first end of the first diaphragm component 122 is not equal to the size of the first end of the second diaphragm component 123. In some embodiments, the size of the first end of the first diaphragm component 122 is greater than the size of the first end of the second diaphragm component 123. In some embodiments, the size of the first end of the first diaphragm component 122 is less than the size of the first end of the second diaphragm component 123.

[0067] In some embodiments, the first diaphragm component 122 and the second diaphragm component 123 are, for example, asymmetrical. For example, the size of the second end of the first diaphragm component 122 is not equal to the size of the second end of the second diaphragm component 123. The second ends of the first diaphragm component 122 and the second ends of the second diaphragm component 123 are fixed together by a fixing unit 132. The fixing unit 132, for example, has an extension to compensate for the dimensional difference between the second end of the first diaphragm component 122 and the second end of the second diaphragm component 123, thereby fixing the second ends of the first diaphragm component 122 and the second end of the second diaphragm component 123 together by the fixing unit 132. In some embodiments, the size of the second end of the first diaphragm component 122 is larger than the size of the second end of the second diaphragm component 123. In some embodiments, the size of the second end of the first diaphragm component 122 is smaller than the size of the second end of the second diaphragm component 123.

[0068] It is worth noting that the first diaphragm component 122 and the second diaphragm component 123 are, for example, asymmetrical to each other. For instance, the first diaphragm component 122 and the second diaphragm component 123 are not equal in at least one of the following corresponding dimensions: the first length L1 of the first diaphragm component 122 extending in the direction of the sound field and the second length L2 of the first diaphragm component 122 extending in the direction of the sound field; the size of the first end of the first diaphragm component 122 and the size of the first end of the second diaphragm component 123; and the size of the second end of the first diaphragm component 122 and the size of the second end of the second diaphragm component 123.

[0069] In some instances, the first diaphragm component 122 and the second diaphragm component 123 are integrally formed, that is, the first diaphragm component 122 and the second diaphragm component 123 are integrally formed as a single component, as an independent diaphragm structure.

[0070] FIG8 shows a schematic diagram of the first diaphragm component and the second diaphragm component according to an embodiment of the present disclosure. The first diaphragm component 122 and the second diaphragm component 123 are integrally formed. The first diaphragm component 122 and the second diaphragm component 123 are, for example, hemispherical, and after docking, they, for example, surround a spherical space.

[0071] FIG9 shows a schematic diagram of the first diaphragm component and the second diaphragm component according to an embodiment of the present disclosure. The first diaphragm component...The diaphragm component 122 and the second diaphragm component 123 are integrally formed. The first diaphragm component 122 and the second diaphragm component 123 are, for example, semi-ellipsoidal, and after docking, the first diaphragm component 122 and the second diaphragm component 123 surround an ellipsoidal space.

[0072] FIG10 shows a schematic diagram of the first diaphragm component and the second diaphragm component according to an embodiment of the present disclosure. The first diaphragm component 122 and the second diaphragm component 123 are integrally formed. The first diaphragm component 122 and the second diaphragm component 123 are, for example, semi-ellipsoidal, and after docking, the first diaphragm component 122 and the second diaphragm component 123 surround an ellipsoidal space.

[0073] FIG11 shows a schematic diagram of the first diaphragm component and the second diaphragm component according to an embodiment of the present disclosure. The first diaphragm component 122 and the second diaphragm component 123 are integrally formed. The first diaphragm component 122 and the second diaphragm component 123 are, for example, conical, and after docking, the first diaphragm component 122 and the second diaphragm component 123 surround a space. In some embodiments, the first diaphragm component 122 and the second diaphragm component 123 are, for example, square pyramidal in shape.

[0074] FIG12 shows a schematic diagram of the first diaphragm component and the second diaphragm component according to an embodiment of the present disclosure. The first diaphragm component 122 and the second diaphragm component 123 are integrally formed. The first diaphragm component 122 and the second diaphragm component 123 are, for example, horn-shaped, and after docking, the first diaphragm component 122 and the second diaphragm component 123, for example, surround a space.

[0075] It is worth noting that, based on the shape characteristics of the first diaphragm component 122 and the second diaphragm component 123 (for example, the axial first end dimension of the first diaphragm component 122 and the second diaphragm component 123 is smaller than the axial second end dimension), the air resistance during the resonance process is significantly reduced, and the effective volume of the space surrounded by the first diaphragm component and the second diaphragm component is larger. The first diaphragm component and the second diaphragm component form an "air spring" structure, thereby effectively reducing the resonant frequency of the acoustic transducer.

[0076] In some embodiments, the acoustic-electric transducer 100 is formed, for example, by adding a second diaphragm component 123 (e.g., a second diaphragm) to a speaker that includes a first voice coil 121, a first diaphragm component 122 (e.g., a first diaphragm), a first magnetic ring 141, a first T-iron 142, a first frame 131, and a fixing unit 132.

[0077] It is worth noting that existing open-type active noise cancellation often performs poorly in the low-frequency wideband. Moreover, the current woofers (loudspeakers) that can achieve sufficient low-frequency quantity and depth are all very large, which greatly affects their practical application. For example, the air outlets of central air conditioners and range hoods are not large enough to accommodate speakers larger than 8 inches and enclosures.Furthermore, due to its large size, it cannot be installed in some systems that require active noise cancellation, such as range hoods. Moreover, after the speaker is installed in the enclosure, its resonant frequency will be greatly increased, resulting in the loss of noise cancellation effect on frequencies that were originally capable of producing active noise cancellation. The acoustic-electric transducer 100 disclosed herein can solve the fundamental defects of speakers in active noise cancellation, and its cost is far lower than a large amount of sound field calculation.

[0078] In addition, in order to solve the problem of low-frequency wideband noise cancellation in open active noise cancellation, while not causing mid-high frequency howling or extremely low frequency resonance, and accurately targeting the low-frequency booming frequency range for active noise cancellation, current open active noise cancellation technologies, such as the use of single-diaphragm speakers, will further increase the resonant frequency after these speakers are installed in the corresponding speaker enclosures, and will also make the speaker enclosures very large, which greatly limits their application. Therefore, rash modifications will inevitably lead to: 1. Overheating and burning of the speaker; 2. Inability to drive the speaker, resulting in too low volume and negligible active noise cancellation effect; 3. Cutting vibration of the speaker diaphragm instead of the expected piston movement, thus greatly reducing the active noise cancellation effect. Overemphasizing algorithm optimization cannot solve the inherent shortcomings of speakers in active noise cancellation. The algorithm cannot compensate for the 90-degree phase difference between the input and output at the speaker's resonant frequency. Therefore, current technology can only provide "special care" for narrow frequencies, and is basically unsolvable when encountering wide-frequency low-frequency noise such as the booming sound of a range hood.

[0079] In some embodiments, the acoustic-electric transducer 100 further includes a diaphragm inner support unit 108, which is disposed within the space defined by the first diaphragm component 122 and the second diaphragm component 123, and is fixed relative to the first diaphragm component 122 and the second diaphragm component 123.

[0080] The diaphragm inner support unit 108 can be referred to as the diaphragm inner support unit 108 in FIG14. The diaphragm inner support unit 108 is, for example, a ring structure. Multiple coupling portions 181 are provided on the ring structure of the diaphragm inner support unit 108. These coupling portions 181 are configured to couple with multiple counterweight units (not shown in the figure) respectively, so as to reduce the resonant frequency. The coupling portions 181 are, for example, any one of openings, snap-fits, and threads. The counterweight unit is a mass block. The counterweight unit is, for example, coupled with the coupling portions 181 to be fixed to the diaphragm inner support unit 108. For example, the counterweight unit is screw-shaped and connected to the coupling portions 181 by threads.

[0081] For example, the first diaphragm component 122 and the second diaphragm component 123 are respectively attached to the two side edges of the ring structure of the diaphragm inner support unit 108 from both sides and fixed to the diaphragm inner support unit 108. The first diaphragm component 122, the second diaphragm component 123, and the diaphragm inner support unit 108 vibrate in the same direction. Instruction manual, page 7 / 12, 10 CN121310045A

[0082] Figure 13 shows a schematic diagram of the resonant frequency waveform of an acoustic-electric transducer. This acoustic-electric transducer lacks the second diaphragm component 123 compared to acoustic-electric transducer 100. As shown in the figure, the resonant frequency of this acoustic-electric transducer is 65.6 Hz.

[0083] Figure 14 shows a schematic diagram of the resonant frequency waveform of an acoustic-electric transducer 100 according to an embodiment of this disclosure. This acoustic-electric transducer 100, for example, does not have an internal diaphragm support unit 108 or a weight unit. As shown in the figure, the resonant frequency of this acoustic-electric transducer is 55.8 Hz, which is significantly lower than the resonant frequency of the acoustic-electric transducer corresponding to Figure 13.

[0084] Figure 15 shows a schematic diagram of the resonant frequency waveform of an acoustic-electric transducer. Compared to the acoustic-electric transducer corresponding to Figure 13, this acoustic-electric transducer also has a sealed housing that cooperates with the acoustic-electric transducer, the volume of which is, for example, 2.3 liters. According to the figure, the resonant frequency of the acoustic-electric transducer is 101Hz. It can be seen that for an acoustic-electric transducer lacking the second diaphragm component 123, its resonant frequency will be significantly higher after being connected to a sealed enclosure compared to its free state without an enclosure. This increase in resonant frequency is fatal to the low-frequency broadband active noise reduction effect.

[0085] It is worth noting that the resonant frequency corresponding to the acoustic-electric transducer 100 is related to the mass of the applied counterweight. For example, the resonant frequency corresponding to the acoustic-electric transducer 100 is negatively correlated with the mass of the applied counterweight; the larger the mass of the counterweight, the lower the resonant frequency corresponding to the acoustic-electric transducer 100. Specifically, according to the simple harmonic motion formula (spring oscillator) T = 2π(m / k) 1 / 2, where T is the period, m is the mass, K is the spring stiffness, and (m / k) 1 / 2 represents the square root of (m / k); when the vibrating mass m is larger, the period T is longer and the frequency f = 1 / T is smaller.

[0086] FIG16 shows a schematic diagram of an acoustic-electric transducer 200 according to an embodiment of the present disclosure. FIG17 shows an exploded schematic diagram of an acoustic-electric transducer 200 according to an embodiment of the present disclosure. It should be understood that the acoustic-electric transducer 200 may also include additional components not shown and / or the components shown may be omitted, and the scope of the present disclosure is not limited in this respect.

[0087] The acoustic-electric transducer 200 is, for example, a dual-magnetic-circuit acoustic-electric transducer. The acoustic-electric transducer 200 can be applied, for example, to a loudspeaker. The acoustic-electric transducer 200 is, for example, a loudspeaker. For example, the acoustic-electric transducer 200 may have a vibration system 102, a first magnetic circuit system 104, and an auxiliary system 103. The vibration system 102 is fixedly connected to the first magnetic circuit system 104 through the auxiliary system 103. Under the action of the magnetic field of the first magnetic circuit system 104, the vibration system 102 is subjected to force and vibrates, which drives the diaphragm in the vibration system 102 to vibrate, and the diaphragm then pushes the air molecules inside the loudspeaker to amplify the sound.

[0088] Regarding the vibration system 102, it includes at least a first voice coil 121, a first diaphragm component 122, and a second diaphragm component 123. The first diaphragm component 122 and the second diaphragm component 123 each have a first end and a second end along their respective axial directions. For ease of explanation, the positive X-axis direction is indicated by arrows in the figures, and the axial directions of the first diaphragm component 122 and the second diaphragm component 123 are, for example, arranged along the X-axis direction. For example, the first end of the first diaphragm component 122 is positioned relative to the second end on the negative X-axis side, and the first end of the second diaphragm component 123 is positioned relative to the second end on the positive X-axis side. The first diaphragm component 122 and the second diaphragm component 123 are configured to be coaxially opposite each other at their respective axial second ends. The size of the first axial first end of the first diaphragm component 122 and the second diaphragm component 123 is smaller than the size of their respective axial second ends. The first axial first end of the first diaphragm component 122 is fixedly connected to the first voice coil 121. The first voice coil 121 is configured to vibrate when a current signal flows through it, such that the vibration directions of the first diaphragm component 122 and the second diaphragm component 123 are the same. The first diaphragm component 122 and the second diaphragm component 123 are, for example, horn-shaped diaphragms.

[0089] Regarding the first magnetic circuit system 104, it is configured to provide a first magnetic field. The first magnetic circuit system 104 includes, for example, a first magnetic ring 141 and a first T-iron 142. The hole of the first magnetic ring 141 is used to accommodate the first voice coil 121. The first T-iron 142 is used to fix the first magnetic ring 141, the first voice coil 121, and the auxiliary system 103.

[0090] The vibration system 102 further includes a second voice coil 124, which is fixedly connected to the axial first end of the second diaphragm component 123. The second voice coil 124 is configured to vibrate when a current signal flows through it, thereby at least driving the second diaphragm component 123 to vibrate.

[0091] In some embodiments, the direction of the current signal flowing through the first voice coil 121 is adapted to the direction of the current signal flowing through the second voice coil 124, so that the vibration directions of the first voice coil 121 and the second voice coil 124 are consistent.

[0092] The acoustic-electric transducer 200 further includes, for example, a second magnetic circuit system 106. The first magnetic circuit system 104 and the second magnetic circuit system 106 are configured to provide magnetic fields with directions adapted to each other, so that the vibration directions of the first voice coil 121 and the second voice coil 124 are the same.

[0093] For example, the current signal flowing through the first voice coil 121 is in the opposite direction to the current signal flowing through the second voice coil 124. The first magnetic circuit system 104 and the second magnetic circuit system 106 are configured to provide magnetic fields with the same direction (i.e., in the same direction). Thus, the current signal flowing through the first voice coil 121 is adapted to the direction of the current signal flowing through the second voice coil 124.System 104 and the second magnetic circuit system 106 provide magnetic fields with directions adapted to each other so that the vibration directions of the first voice coil 121 and the second voice coil 124 are aligned.

[0094] For example, if the current signal flowing through the first voice coil 121 is in the same direction as the current signal flowing through the second voice coil 124, the first magnetic circuit system 104 and the second magnetic circuit system 106 are configured to provide magnetic fields with opposite (i.e., reverse) directions, so that the current signal flowing through the first voice coil 121 is adapted to the current signal flowing through the second voice coil 124, and the first magnetic circuit system 104 and the second magnetic circuit system 106 provide magnetic fields with directions adapted to each other so that the vibration directions of the first voice coil 121 and the second voice coil 124 are aligned.

[0095] The second magnetic circuit system 106 includes, for example, a second magnetic ring 161 and a second T-iron 162. The hole in the second magnetic ring 161 is used to accommodate the second voice coil 124. The second T-iron 162 is used to fix the second magnetic ring 161, the second voice coil 124, and the auxiliary system 103.

[0096] The auxiliary system 103 includes a first frame 131 and a second frame 133. The first frame 131 is fixed to the first magnetic circuit system, and the second frame 133 is fixed to the second magnetic circuit system 106. The second frame 133 and the first frame 131 are coupled via a support member 110. The shape of the support member 110 matches, for example, the shape of the ends of the second frame 133 and the first frame 131. The support member 110 is, for example, an annular support member. The second frame 133 and the first frame 131 are respectively attached to the support member 110 from both sides and fixed to the support member 110. The ends of the first frame 131 and the second frame 133 may be provided with fixing units, or they may not be provided with fixing units.

[0097] The auxiliary system 103 also includes, for example, a second washer 135 and a second spring 137. The second spring wave 137 is disposed, for example, at the end of the second frame 133 away from the first frame 131. The second washer 135 is, for example, in contact with the second spring wave 137. The second voice coil 124 passes through the hole of the second washer 135 and the hole of the second spring wave 137 and contacts the second diaphragm component 123.

[0098] It is worth noting that, based on the shape characteristics of the first diaphragm component 122 and the second diaphragm component 123 (for example, the axial first end dimension of the first diaphragm component 122 and the second diaphragm component 123 is smaller than the axial second end dimension), the air resistance during the resonance process is greatly reduced, and the effective volume of the space surrounded by the first diaphragm component and the second diaphragm component is larger. The first diaphragm component and the second diaphragm component form an "air spring" structure, thereby effectively reducing the resonant frequency of the acoustic transducer.

[0099] In some embodiments, the acoustic-electric transducer 200 further includes a diaphragm inner support unit 108, disposed within the space defined by the first diaphragm component 122 and the second diaphragm component 123, and connected to the first diaphragm component 122 and the second diaphragm component 123.For fixing.

[0100] Wherein, the inner support unit 108 of the diaphragm is, for example, a ring structure, and a plurality of coupling parts 181 are provided on the ring structure of the inner support unit 108 of the diaphragm. The plurality of coupling parts 181 are configured to be coupled to a plurality of counterweight units (not shown in the figure) respectively, so as to reduce the resonant frequency. Wherein, the coupling part 181 is, for example, any one of opening, snap-fit ​​and thread. The counterweight unit is a gauge block, CN121310045A, page 9 / 12 of the specification. The counterweight unit is, for example, coupled to the coupling part 181 so as to be fixed on the inner support unit 108 of the diaphragm. For example, the counterweight unit is in the shape of a screw and is connected to the coupling part 181 by thread.

[0101] For example, the first diaphragm component 122 and the second diaphragm component 123 respectively fit against the two side edges of the ring structure of the inner support unit 108 of the diaphragm from both sides and are fixed to the inner support unit 108 of the diaphragm. The first diaphragm component 122, the second diaphragm component 123, and the diaphragm inner support unit 108 vibrate in the same direction.

[0102] FIG18 shows a schematic diagram of the resonant frequency waveform of a first configuration of the acoustic-electric transducer 200 according to an embodiment of the present disclosure. The acoustic-electric transducer 200 includes, for example, an inner support unit 108 and a weight unit. The total mass of the inner support unit 108 and the weight unit is, for example, 10g. As shown in the figure, the resonant frequency of the acoustic-electric transducer is 35Hz. Compared with the acoustic-electric transducer 100 corresponding to FIG14, the resonant frequency of the acoustic-electric transducer 200 is significantly lower.

[0103] FIG19 shows a schematic diagram of the resonant frequency waveform of a second configuration of the acoustic-electric transducer 200 according to an embodiment of the present disclosure. The acoustic-electric transducer 200 includes, for example, an inner support unit 108 and a weight unit. The total mass of the inner support unit 108 and the weight unit is, for example, 23g. As shown in the figure, the resonant frequency of the acoustic-electric transducer is 32Hz. Compared with the acoustic-electric transducer 200 in Figure 17, the resonant frequency of the acoustic-electric transducer 200 is lower.

[0104] Therefore, the resonant frequency of the acoustic-electric transducer 200 is related to the mass of the applied counterweight. For example, the resonant frequency of the acoustic-electric transducer 200 is negatively correlated with the mass of the applied counterweight. The larger the mass of the counterweight, the lower the resonant frequency of the acoustic-electric transducer 200. Specifically, according to the simple harmonic motion formula (spring oscillator) T=2π(m / k)1 / 2, where T is the period, m is the mass, K is the spring stiffness, and (m / k)1 / 2 represents the square root of (m / k); when the vibrating mass m is larger, the period T is longer and the frequency f=1 / T is smaller.

[0105] Figure 20 shows a schematic diagram of the resonant frequency waveform of the third configuration of the acoustic-electric transducer 200 of the present disclosure. Compared to the acoustic-electric transducer shown in Figure 18, this acoustic-electric transducer also has a sealed component that works in conjunction with it.The enclosure has a volume of, for example, 2.3 liters. As shown in the figure, the resonant frequency corresponding to the acoustic-electric transducer is 52.9 Hz. It can be seen that the resonant frequency corresponding to the third configuration of the acoustic-electric transducer 200 is significantly lower than the resonant frequency (101 Hz) of the acoustic-electric transducer corresponding to Figure 15.

[0106] Figure 21 shows a schematic diagram of an acoustic-electric transducer system 300 according to an embodiment of the present disclosure. Figure 22 shows an exploded view of an acoustic-electric transducer system 300 according to an embodiment of the present disclosure. It should be understood that the acoustic-electric transducer system 300 may also include additional components not shown and / or components shown may be omitted; the scope of the present disclosure is not limited in this respect. The acoustic-electric transducer system 300 can be applied, for example, to a loudspeaker. The acoustic-electric transducer system 300 is, for example, a loudspeaker.

[0107] The acoustic-electric transducer system 300 includes, for example, a first acoustic-electric transducer and a second acoustic-electric transducer. The first acoustic-electric transducer includes a first voice coil 121 and a first diaphragm component 122. The first diaphragm component 122 includes an axial first end and an axial second end. The axial first end of the first diaphragm component 122 is fixedly connected to the first voice coil, and the size of the axial first end is smaller than the size of the axial second end. The second acoustic-electric transducer includes a second voice coil 124 and a second diaphragm component 123. The second diaphragm component 123 includes an axial first end and an axial second end. The axial first end of the second diaphragm component 123 is fixedly connected to the second voice coil. The axial second end of the first diaphragm component 122 and the axial second end of the second diaphragm component 123 are coaxially opposite to each other. The first voice coil 121 and the second voice coil 124 are configured such that when current flows through the first voice coil 121 and the second voice coil 124, the vibration directions of the first diaphragm component 122 and the second diaphragm component 123 are the same.

[0108] The acoustic-electric transducer system 300 also includes, for example, a first magnetic circuit system 104, which is configured to provide a first magnetic field. The first magnetic circuit system 104 includes, for example, a first magnetic ring 141 and a first T-iron 142. A hole in the first magnetic ring 141 is used to receive a first voice coil 121. The first T-iron 142 is used to fix the first magnetic ring 141, the first voice coil 121, and the auxiliary system 103.

[0109] The acoustic-electric transducer system 300 also includes, for example, a second magnetic circuit system 106. The first magnetic circuit system 104 and the second magnetic circuit system 106 are configured to provide magnetic fields with directions that are compatible with each other, such that the vibration directions of the first voice coil 121 and the second voice coil 124 are the same.

[0110] For example, if the current signal flowing through the first voice coil 121 is in the opposite direction to the current signal flowing through the second voice coil 124, the first magnetic circuit system 104 and the second magnetic circuit system 106 are configured to provide magnetic fields with the same (i.e., in the same direction) magnetic fields, such that the vibration directions of the first voice coil 121 and the second voice coil 124 are consistent.

[0111] For example, the current signal flowing through the first voice coil 121 is in the same direction as the current signal flowing through the second voice coil 124. The first magnetic circuit system 104 and the second magnetic circuit system 106 are configured to provide magnetic fields with opposite (i.e., opposite) directions so that the vibration directions of the first voice coil 121 and the second voice coil 124 are aligned.

[0112] The second magnetic circuit system 106 includes, for example, a second magnetic ring 161 and a second T-iron 162. The hole of the second magnetic ring 161 is used to receive the second voice coil 124. The second T-iron 162 is used to fix the second magnetic ring 161, the second voice coil 124, and the auxiliary system 103.

[0113] The auxiliary system 103 includes a first frame 131 and a second frame 133. The first frame 131 is fixed to the first magnetic circuit system, and the second frame 133 is fixed to the second magnetic circuit system 106. The second frame 133 and the first frame 131 are coupled via a support member 110. The shape of the support member 110 matches, for example, the shape of the ends of the second frame 133 and the first frame 131. The support member 110 is, for example, an annular support member. The second frame 133 and the first frame 131 are respectively attached to the support member 110 from both sides and fixed to the support member 110. Fixing units may be provided at the ends of the first frame 131 and the second frame 133, or no fixing units may be provided.

[0114] The auxiliary system 103 also includes, for example, a second washer 135 and a second spring 137. The second spring 137 is, for example, disposed at the end of the second frame 133 away from the first frame 131. The second washer 135 is, for example, attached to the second spring 137. The second voice coil 124 passes through the hole of the second washer 135 and the hole of the second spring 137 and contacts the second diaphragm component 123.

[0115] Experiments show that placing the acoustic-electric transducer system 300 below the range hood successfully reduced the low-frequency noise (e.g., 50Hz to 360Hz) of the range hood by a full 7 dB C-weighted and 4 dB A-weighted, completely eliminating the originally annoying booming noise of the range hood. It should be understood that this makes the range hood sound like a large electric fan, greatly improving the comfort of using the range hood. For example, in the acoustic-electric transducer system 300, the first diaphragm component 122 and the second diaphragm component 123 are connected by the annular structure of the diaphragm inner support unit 108. The gaps in the first basin 131 and the second basin 133 are filled with materials of appropriate size to prevent sound leakage. Furthermore, a small chamber is additionally reserved at the top heat dissipation hole position of the range hood to ensure heat dissipation and prevent sound leakage to the microphone, thus preventing microphone feedback.

[0116] The first and second acoustic-electric transducers in the acoustic-electric transducer system 300 should be selected with the same impedance as much as possible to avoid generating noise. Their wiring method is in phase to ensure that the first magnetic circuit system 104 and the second magnetic circuit system 106 are not...The noise reduction will fail due to the vibration being canceled out by the reverse wiring. One end of the acoustic-electric transducer system 300 is aligned with the direction where noise reduction is needed, such as the air inlet of the range hood, and the other end of the acoustic-electric transducer system 300 is connected to a sealed box, which can be coated with sound-absorbing cotton.

[0117] According to the experiment, compared with the acoustic-electric transducer corresponding to Figure 13, the resonant frequency of the acoustic-electric transducer system 300 has dropped to 48Hz. That is to say, the acoustic-electric transducer system 300 can actively reduce noise in the frequency band above 48Hz, while the acoustic-electric transducer corresponding to Figure 13, although its nominal resonant frequency is 65.6Hz, actually increases to 101Hz after being packaged according to the requirements (i.e., adding a sealed box to cooperate with the acoustic-electric transducer, the volume of which is, for example, 2.3 liters). Therefore, the acoustic-electric transducer corresponding to Figure 13 cannot reduce noise in the frequency band below 101Hz.

[0118] Furthermore, it is worth emphasizing that, according to the above experiments, based on the shape characteristics of the first diaphragm component 122 and the second diaphragm component 123 (pages 11 / 12 of the specification, CN121310045A) (for example, the axial first end dimension of the first diaphragm component 122 and the second diaphragm component 123 is smaller than the axial second end dimension), the vibration amplitude corresponding to the acoustic-electric transducer system 300 did not decrease, but was greater than the vibration amplitude corresponding to the acoustic-electric transducer in FIG13. This is a result of the significant reduction in air resistance caused by the shape characteristics of the first diaphragm component 122 and the second diaphragm component 123.

[0119] FIG23 shows a flowchart of the noise reduction method 400 of an embodiment of the present disclosure. It should be understood that the noise reduction method 400 may also include additional steps not shown and / or the steps shown may be omitted, and the scope of the present disclosure is not limited in this respect. The noise reduction method 400 can be implemented using a noise reduction device. In some embodiments, the noise reduction device includes the acoustic-electric transducer 100 of an embodiment of the present disclosure. In some embodiments, the noise reduction device includes an acoustic-electric transducer 200 according to embodiments of the present disclosure. In some embodiments, the noise reduction device includes an acoustic-electric transducer system 300 according to embodiments of the present disclosure.

[0120] According to the noise reduction method 400, at step 402, at least one noise reduction device is disposed in a target area of ​​the place to be noise-reduced. The target area includes at least one of the following: a noise source; a propagation path; and a noise receiving point.

[0121] At step 402, power is supplied to the noise reduction device to implement noise reduction.

[0122] The place to be noise-reduced includes at least one of the following: transportation facilities; factories; construction sites; shopping malls; public entertainment venues; and medical facilities.

[0123] For example, the noise reduction device is applied to transportation facilities. Transportation facilities include, for example, road transportation facilities (e.g., public transportation facilities).Noise control for roads, rail transit facilities (e.g., railways, subway lines, train stations), air traffic facilities (e.g., airports, aircraft), and shipping facilities (e.g., ships). The noise reduction device is installed at at least one of the following: at the noise source; at the propagation path; and at the noise receiving point.

[0124] In some embodiments, the noise reduction device is applied to a factory to control industrial aerodynamic noise, mechanical equipment noise, electromagnetic noise, and ancillary facility noise.

[0125] In some embodiments, the noise reduction device is applied to a construction site to control noise during the earthwork stage of building construction, the foundation construction stage, and the structural construction stage.

[0126] In some embodiments, the noise reduction device is applied to control noise in commercial establishments (e.g., shopping malls) and public activity venues (e.g., public entertainment venues).

[0127] The noise reduction device can be applied, for example, to control other social noise, including household appliances.

[0128] In some embodiments, the noise reduction device is applied to control noise in medical facilities.

[0129] After the noise reduction device is powered on and started, it can resonate with the corresponding frequency components in the environmental noise during operation, so as to eliminate the corresponding frequency components in the environmental noise and achieve the noise reduction effect.

[0130] Various embodiments of the present disclosure have been described above. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical applications, or technical improvements to the embodiments in the market, or to enable other those skilled in the art to understand the embodiments disclosed herein.

[0131] The above are only optional embodiments of the present disclosure and are not intended to limit the present disclosure. Various modifications and variations can be made to the present disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present disclosure should be included within the protection scope of the present disclosure. Instruction manual, page 12 / 12, page 15, CN121310045A, Figure 1; Instruction manual, Figure 1 / 18, page 16, CN121310045A, Figure 2; Instruction manual, Figure 2 / 18, page 17, CN121310045A, Figure 3; Instruction manual, Figure 3 / 18, page 18, CN121310045A, Figure 5; Instruction manual, Figure 4 / 18, page 19, CN121310045A, Figure 6; Instruction manual, Figure 5 / 18, page 20, CN121310045A, Figure 7; Instruction manual, Figure 6 / 18, page 21, CN121310045A, Figure 8; Instruction manual, Figure 7 / 18, page 21.22 CN121310045A Figure 9 Figure 10 Appendix 8 / 18 of the Specification 23 CN121310045A Figure 11 Appendix 9 / 18 of the Specification 24 CN121310045A Figure 12 Figure 13 Appendix 10 / 18 of the Specification 25 CN121310045A Figure 14 Figure 15 Appendix 11 / 18 of the Specification 26 CN121310045A Figure 16 Appendix 12 / 18 of the Specification 27 CN121310045A Figure 17 Appendix 13 / 18 of the Specification 28 CN121310045A Figure 18 Figure 19 Appendix 14 / 18 of the Specification 29 CN121310045A Figure 20 Appendix 15 / 18 of the Specification 30 CN121310045A Figure 21 Appendix 16 / 18 of the Specification 31 CN121310045A Figure 22 Figure 17 / 18 of the specification page 32 CN121310045A Figure 23 Figure 18 / 18 page 33 of the specification CN121310045A Abstract Abdominal ultrasound examination method, system and device An acoustic-electric transducer, a system, and a noise reduction method The present disclosure relates to an acoustic-electric transducer, a system, and a noise reduction method. The present disclosure relates to an acoustic-electric transducer, a system, and a noise reduction method. acoustic-electric transducer includes: a vibration system, which at least includes a first voice coil, a first diaphragm component, and a second diaphragm component. The first diaphragm component and the second diaphragm component each include an axial first end and an axial second end, and the axialfirst end of the first diaphragm component is connected to the first voice coil; a first magnetic circuit system, configured to provide a first magnetic field; and an auxiliary system, used for fixing the first diaphragm component and the second diaphragm component, and fixed to the first magnetic circuit system. The second ends of the first diaphragm component and the second diaphragm component are arranged opposite each other. The first voice coil is configured to vibrate when a current signal flows through it, causing the first diaphragm component and the second diaphragm component to vibrate in the same direction to reduce air resistance during the resonance process. The solution of the present disclosure can reduce the resonant frequency of the speaker while maintaining a compact speaker enclosure volume, thereby effectively improving the active noise reduction effect of the speaker.

Claims

1. A sound-to-electric transducer, characterized in that, include: A vibration system, the vibration system including at least a first voice coil, a first diaphragm component and a second diaphragm component, the first diaphragm component and the second diaphragm component both including an axial first end and a second end, the axial first end of the first diaphragm component being connected to the first voice coil; A first magnetic circuit system is configured to provide a first magnetic field; and An auxiliary system is used to fix the first diaphragm component and the second diaphragm component, and is fixed to the first magnetic circuit system; The first diaphragm component and the second diaphragm component are disposed opposite each other at their second ends. The first voice coil is configured to vibrate when a current signal flows through the first voice coil, so that the vibration directions of the first diaphragm component and the second diaphragm component are the same to reduce air resistance during the resonance process.

2. The acoustic-electric transducer according to claim 1, characterized in that, The dimensions of the first and second diaphragm components at their respective first axial ends are smaller than the dimensions of their respective second axial ends. The first and second diaphragm components are configured to be coaxially opposite each other at their respective second axial ends to form a closed space. The first and second diaphragm components vibrating in the same direction form an "air spring" structure to reduce the resonant frequency of the acoustic transducer.

3. The acoustic-electric transducer according to claim 1, characterized in that, The vibration system also includes a second voice coil, which is fixedly connected to the first axial end of the second diaphragm component. The second voice coil is configured to vibrate when a current signal flows through it, thereby causing at least the second diaphragm component to vibrate.

4. The acoustic-electric transducer according to claim 3, characterized in that, The direction of the current signal flowing through the first voice coil is matched with the direction of the current signal flowing through the second voice coil so that the vibration directions of the first and second voice coils are consistent.

5. The acoustic-electric transducer according to claim 2, characterized in that, Also includes: The diaphragm inner support unit is disposed within the space defined by the first diaphragm component and the second diaphragm component, and is fixed relative to the first diaphragm component and the second diaphragm component.

6. The acoustic-electric transducer according to claim 5, characterized in that, The inner support unit of the diaphragm is a ring structure, and multiple coupling parts are provided on the ring structure. The multiple coupling parts are configured to be coupled to multiple counterweight units respectively, so as to reduce the resonant frequency.

7. The acoustic-electric transducer according to claim 6, characterized in that, The coupling part is any one of an opening, a snap-fit, and a thread, and the counterweight unit is a mass block.

8. The acoustic-electric transducer according to claim 3, characterized in that, Also includes: A second magnetic circuit system is configured to provide magnetic fields whose directions are compatible with each other, such that the vibration directions of the first and second voice coils are the same.

9. The acoustic-electric transducer according to claim 1, characterized in that, The first magnetic circuit system includes a magnetic ring, and a first voice coil passes through a hole in the magnetic ring; The auxiliary systems include: The first basin stand is fixed to the first magnetic circuit system; and A fixing unit is disposed at the end of the first diaphragm frame and is used to fix the first diaphragm component and the second diaphragm component together.

10. The acoustic-electric transducer according to claim 8, characterized in that, The auxiliary systems include: The first basin stand is fixed to the first magnetic circuit system; and The second basin stand is fixed to the second magnetic circuit system, and the second basin stand and the first basin stand are coupled together via a support member.

11. The acoustic-electric transducer according to claim 1, characterized in that, The first diaphragm component includes a first diaphragm, and the second diaphragm component includes a second diaphragm; the first diaphragm component and the second diaphragm component are coupled together; or The first diaphragm component and the second diaphragm component are integrally formed.

12. The acoustic-electric transducer according to claim 3, characterized in that, Also includes: The enclosure, coupled to the auxiliary system, includes at least a first voice coil, a first diaphragm component, and a first magnetic circuit system, all housed within the space defined by the enclosure. as well as A power supply device used to provide current signals.

13. A sound-to-electricity conversion system, characterized in that, include: A first acoustic-electric transducer, comprising a first voice coil and a first diaphragm component, the first diaphragm component comprising an axial first end and an axial second end, the axial first end of the first diaphragm component being fixedly connected to the first voice coil, the dimension of the axial first end being smaller than the dimension of the axial second end; and The second acoustic-electric transducer includes a second voice coil and a second diaphragm component. The second diaphragm component includes an axial first end and an axial second end. The axial first end of the second diaphragm component is fixedly connected to the second voice coil. The axial second end of the first diaphragm component and the axial second end of the second diaphragm component are coaxially opposite to each other. The first voice coil and the second voice coil are configured such that when current flows through the first voice coil and the second voice coil, the vibration directions of the first diaphragm component and the second diaphragm component are the same. The first diaphragm component includes a first diaphragm, the second diaphragm component includes a second diaphragm, and the first diaphragm component and the second diaphragm component are coupled together; or the first diaphragm component and the second diaphragm component are integrally formed.

14. A noise reduction method, characterized in that, The noise reduction method is implemented using a noise reduction device, which includes an acoustic-electric transducer according to any one of claims 1 to 12 or an acoustic-electric transducer system according to claim 13. The method includes: At least one of the noise reduction devices is placed in the target area of ​​the place where noise reduction is to be implemented; and Power is supplied to the noise reduction device to perform noise reduction; The target area includes at least one of the following: At the noise source; At the point of propagation; and At the noise receiving point.

15. The noise reduction method according to claim 14, characterized in that, The locations requiring noise reduction include at least one of the following: Transportation facilities; Factory building; Construction site; shopping mall; Public entertainment venues; and Medical facilities.

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