Audible sound wave coupling agent as well as preparation method and use method thereof
By using a strong material with a particle size of less than 75μm and an audible acoustic coupling agent made of a high-viscosity liquid polymer to fill the gaps at the sound wave interface of the musical instrument, the sound quality problem caused by the reflection at the medium interface was solved, and the sound quality was improved and the transmission efficiency was improved.
Patent Information
- Application Number
- CN202510924538.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-04
- Publication Date
- 2025-10-31
AI Technical Summary
Existing musical instruments suffer from sound quality problems such as reduced volume, uneven frequency response, and decreased resolution due to air reflection at the medium interface during sound wave propagation.
A strong material with an average particle size of less than 75 μm and a liquid polymer with a viscosity of 10 million to 10 million cst are used as audible acoustic coupling agents to fill the microscopic gaps at the acoustic interface and reduce reflection.
It significantly improves the acoustic performance of musical instruments, enhances sound quality and conduction efficiency, and strengthens structural stability and noise reduction.
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Abstract
Description
Technical Field
[0001] This application relates to the field of acoustic coupling agent technology, and in particular to an audible acoustic coupling agent and its preparation and application methods. Background Technology
[0002] Currently, the main research area for acoustic coupling agents is ultrasonic coupling agents, while research on audible acoustic coupling agents is relatively limited. Audible acoustic coupling agents can be applied in various fields, such as musical instruments, audio equipment, transmission devices, mechanical devices, fastener structures, furniture, construction, shoes and insoles, and are particularly useful in the field of musical instruments.
[0003] In the field of musical instruments, the sound quality of an instrument largely depends on the acoustic properties of its structure and materials. During the sound production process of an instrument, sound waves undergo reflection and transmission at the interface between different media. When sound waves propagate from one medium to another, due to the numerous microscopic gaps at the interface filled with air, and the fact that the acoustic impedance of air is much lower than that of the solid medium of the instrument, some sound waves are reflected back to the original medium. This results in a series of problems that degrade sound quality, such as reduced volume, uneven frequency response, decreased resolution (focus), and resonance.
[0004] Therefore, it is crucial to research an audible sound wave coupling agent that can improve sound quality. Summary of the Invention
[0005] This application provides an audible acoustic coupling agent, its preparation method, and its usage method to solve or alleviate the technical problems mentioned above. The audible acoustic coupling agent in this application can improve sound quality.
[0006] In a first aspect, embodiments of this application provide an audible acoustic coupling agent, comprising: a strength material and an adhesive material; The strength material is a solid powder, and the average particle size of the solid powder is less than or equal to 75 μm; The adhesive material comprises a liquid polymer at room temperature, wherein the viscosity of the liquid polymer is 10 million to 10 million cst.
[0007] Optionally, the mass ratio of the strength material to the adhesive material is 0.2 to 7.
[0008] Optionally, the strength material includes one or more of the following: glass fiber powder, carbon fiber powder, wood powder, bamboo powder, metal oxide powder, graphene powder, diamond powder, nano-silica, carbon nanotubes, zirconium silicate powder, and silicon carbide powder.
[0009] Optionally, the adhesive material includes one or more of the following: lubricating oil, silicone oil, and liquid rubber.
[0010] Optionally, the adhesive material further comprises a thickener.
[0011] Optionally, the strength material includes carbon nanotubes, and the adhesive material includes silicone oil or fully synthetic lubricant; The audible acoustic coupling agent comprises: 2-4 parts by weight of carbon nanotubes and 10 parts by weight of silicone oil or fully synthetic lubricant.
[0012] Optionally, the strength material includes nano-silica, and the adhesive material includes silicone oil or fully synthetic lubricant; The audible acoustic coupling agent comprises: 5-15 parts by weight of nano-silica and 10 parts by weight of silicone oil or fully synthetic lubricating oil.
[0013] Optionally, the strength material includes bamboo powder, and the adhesive material includes silicone oil or fully synthetic lubricant; The audible acoustic coupling agent comprises: 3-5 parts by weight of bamboo powder and 6 parts by weight of silicone oil or fully synthetic lubricant.
[0014] Optionally, the strength material includes glass fiber powder, and the adhesive material includes silicone oil or fully synthetic lubricant; The audible acoustic coupling agent comprises: 3-6 parts by weight of glass fiber powder and 1 part by weight of silicone oil or fully synthetic lubricant.
[0015] Secondly, this application provides a method for preparing the audible acoustic coupling agent provided in any of the above embodiments, comprising: slowly adding a portion of the strength material to the adhesive material at room temperature, continuously stirring to ensure uniform mixing, and then continuing to add the remaining portion of the strength material, and stirring until completely uniform after all the material has been added.
[0016] Thirdly, embodiments of this application provide a method for using the audible acoustic coupling agent provided in any of the above embodiments, including: The audible acoustic coupling agent is pressed into a sheet of uniform thickness, the thickness of which is greater than the maximum gap width of the acoustic interface. The thin sheet is cut into small pieces that perfectly match the shape of the acoustic interface; The small piece is attached to one side of the acoustic interface and compacted. Press the acoustic interface tightly; Wipe away any audible acoustic coupling agent that has spilled out of the acoustic interface.
[0017] The embodiments of this application employing the above-described technical solution may have the following advantages: Air exists within the acoustic interface, causing sound wave reflection and significantly reducing sound wave transmission efficiency, thus leading to a decrease in sound quality. The audible acoustic coupling agent in this embodiment includes a strength material and an adhesive material; the strength material is a solid powder with an average particle size of less than or equal to 75 μm; the adhesive material is a liquid polymer at room temperature with a viscosity of 10 million to 10 million cst. The formulation of the audible acoustic coupling agent in this embodiment is scientifically sound. When applied to the middle of the acoustic interface, it fills the microscopic gaps at the interface, reduces sound wave reflection at the interface, and significantly improves acoustic performance and sound quality. Detailed Implementation
[0018] The embodiments described below are exemplary and are only used to explain this application, and should not be construed as limiting this application. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.
[0019] This application provides an audible acoustic coupling agent, comprising: a strength material and an adhesive material; The strength material is a solid powder with an average particle size of less than or equal to 75 μm. The adhesive material includes a liquid polymer at room temperature, with a viscosity of 10 million to 10 million cst.
[0020] In some embodiments, the mass ratio of the strength material to the adhesive material is 0.2 to 7. The mass ratio of the strength material to the adhesive material can be adjusted to ensure that the audible sound coupling agent is either a paste-like consistency or granular without crumbling. Different frequencies of different musical instruments have corresponding optimal mass ratios.
[0021] In some embodiments, the strength material includes one or more of the following: glass fiber powder, carbon fiber powder, wood powder, bamboo powder, metal oxide powder, graphene powder, diamond powder, nano-silica, carbon nanotubes, zirconium silicate powder, and silicon carbide powder.
[0022] In some embodiments, the adhesive material includes one or more of lubricating oil, silicone oil, and liquid rubber. In a specific embodiment, the lubricating oil includes one or more of non-synthetic lubricating oil, semi-synthetic lubricating oil, and fully synthetic lubricating oil. In a specific embodiment, the silicone oil includes one or more of methyl silicone oil and dimethyl silicone oil. In a specific embodiment, the liquid rubber includes one or more of styrene-butadiene rubber, nitrile rubber, and ethylene propylene diene monomer (EPDM) rubber.
[0023] In some embodiments, the adhesive material further comprises a thickener.
[0024] In some embodiments, the strength material includes carbon nanotubes, the adhesive material includes silicone oil or fully synthetic lubricant; the audible acoustic coupling agent includes: 2 to 4 parts by weight of carbon nanotubes and 10 parts by weight of silicone oil or fully synthetic lubricant.
[0025] In some embodiments, the strength material includes nano-silica, the adhesive material includes silicone oil or fully synthetic lubricant; the audible acoustic coupling agent includes: 5 to 15 parts by weight of nano-silica and 10 parts by weight of silicone oil or fully synthetic lubricant.
[0026] In some embodiments, the strength material includes bamboo powder, and the adhesive material includes silicone oil or fully synthetic lubricant; the audible acoustic coupling agent includes 3 to 5 parts by weight of bamboo powder and 6 parts by weight of silicone oil or fully synthetic lubricant.
[0027] In some embodiments, the strength material includes glass fiber powder, and the adhesive material includes silicone oil or fully synthetic lubricant; the audible acoustic coupling agent includes 3 to 7 parts by weight of glass fiber powder and 1 part by weight of silicone oil or fully synthetic lubricant.
[0028] This application provides a method for preparing an audible acoustic coupling agent, comprising: slowly adding a portion of a strength material to an adhesive material at room temperature, continuously stirring to ensure uniform mixing, and then adding the remaining strength material, and stirring until completely uniform after all the material has been added.
[0029] This application provides a method for using an audible acoustic coupling agent, including: The audible acoustic coupling agent is pressed into a thin sheet of uniform thickness, which is greater than the maximum gap width of the acoustic interface. The thin sheet is cut into small pieces that perfectly match the shape of the acoustic interface; The small piece is attached to one side of the acoustic interface and pressed firmly. Press the acoustic interface tightly; Then wipe away any audible acoustic coupling agent that has spilled out beyond the acoustic interface.
[0030] In a specific embodiment, the acoustic interface includes at least one of the following: the interface between the bridge foot and the body of the violin, the interface between the soundpost and the body of the violin, the interface between the bridge string groove and the strings, the interface between the fingerboard string groove and the strings, the interface between the tailpiece and the strings, and the interface between the fine tuner and the strings (the names of the above instrument components are for the violin series; in other instruments, the names of components with the same function may be different, for example, the soundpost is called "heaven and earth pillar" in the guqin).
[0031] The following detailed description uses specific embodiments, but should not be construed as limiting the scope of this application. Any modifications or substitutions made to the methods, steps, or conditions of this application without departing from the spirit and substance of this application are within the scope of this application.
[0032] Example 1 Formula: 3 parts by weight of carbon nanotubes, 10 parts by weight of silicone oil.
[0033] Example 2 Formula: 1 part by weight of nano silica, 2 parts by weight of silicone oil.
[0034] Example 3 Formula: 2 parts by weight of bamboo powder, 3 parts by weight of silicone oil.
[0035] Example 4 Formula: 4 parts by weight of glass fiber powder, 1 part by weight of fully synthetic lubricant.
[0036] Example 5 Formula: 2 parts by weight of carbon fiber powder and 2 parts by weight of fully synthetic lubricant.
[0037] Example 6 Formula: 1 part by weight of nano silicon carbide, 1 part by weight of silicone oil.
[0038] Example 7 Formula: 2 parts by weight of pine wood powder, 3 parts by weight of styrene-butadiene rubber.
[0039] Example 8 Formula: 1 part by weight of graphene powder, 1 part by weight of silicone oil.
[0040] Example 9 Formula: 3 parts by weight of diamond powder, 1 part by weight of fully synthetic lubricating oil.
[0041] Example 10 Formula: 3 parts by weight of zirconium silicate powder, 1 part by weight of fully synthetic lubricating oil.
[0042] Example 11 Formula: 2 parts by weight of alumina powder, 1 part by weight of fully synthetic lubricating oil.
[0043] Comparative Example 1 - Comparative Example 2 To more clearly illustrate the technical effects of the embodiments of this application, the technology in the prior art that is closest to the effects of this application is used as a comparative example.
[0044] Comparative Example 1 uses commercially available water-based ultrasound coupling agent (Haishi Hainuo Medical Ultrasound Coupling Agent). It should be noted that because water in water-based ultrasound coupling agents evaporates quickly, their effectiveness in altering sound quality lasts only 1 hour.
[0045] Comparative Example 2 is a commercially available silicon-based ultrasonic coupling agent (tessonics).
[0046] Performance testing The acoustic coupling agents of Examples 1 to 11 and Comparative Examples 1 to 2 were applied to the acoustic interfaces (bridge foot to body, soundpost to body, bridge groove to strings, fingerboard groove to strings, tailpiece to strings, and tuner to strings) of the same batch of musical instruments (four violins, four violas, four cellos, and four double basses). Five professional musicians then tested and scored the instruments' sound quality according to the scoring criteria shown in Table 1. Before replacing with the next coupling agent, the previous coupling agent was wiped off.
[0047] Table 1
[0048] Five professional musicians scored the changes in the sound quality of the instruments according to the scoring criteria in Table 1 and calculated the average value (the average of 5x4 scores for each violin was taken), as shown in Table 2.
[0049] Table 2
[0050] Table 2 (continued)
[0051] Table 2 (continued)
[0052] Table 2 (continued)
[0053] According to the data in Table 2, compared with Comparative Examples 1 to 2, the audible sound coupling agents of Examples 1 to 11 of this application have significantly higher scores and can improve the sound quality of musical instruments.
[0054] In summary, the presence of air within the acoustic interface causes sound wave reflection, significantly reducing sound wave transmission efficiency and thus degrading sound quality. The audible acoustic coupling agent in this embodiment comprises a strength material and an adhesive material; the strength material is a solid powder with an average particle size of less than or equal to 75 μm; the adhesive material is a liquid polymer at room temperature with a viscosity of 10 million to 10 million cst. The formulation of the audible acoustic coupling agent in this embodiment is scientifically sound and reasonable. When applied to the middle of the acoustic interface, it reduces sound wave reflection at the interface, significantly improving acoustic performance and sound quality.
[0055] The audible acoustic coupling agent of this application can be applied in various fields, such as musical instruments, audio equipment, transmission devices, mechanical devices, fastener structures, furniture, buildings, shoes and insoles, and is particularly applicable to the field of musical instruments. This audible acoustic coupling agent can improve sound quality, increase transmission efficiency, reduce noise, enhance structural stability, and provide cushioning and vibration damping.
[0056] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.
[0057] It should also be noted that the terms "one embodiment," "another embodiment," and "embodiment" used in this application refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this application.
[0058] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.
[0059] It should also be noted that the above are merely preferred embodiments of this application and do not limit the scope of patent protection of this application. Any equivalent procedural changes made using the content of this application's specification, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.
Claims
1. An audible acoustic wave coupling agent, characterized in that, include: Strength materials and adhesives; The strength material is a solid powder, and the average particle size of the solid powder is less than or equal to 75 μm; The adhesive material comprises a liquid polymer at room temperature, wherein the viscosity of the liquid polymer is 10 million to 10 million cst.
2. The audible acoustic coupling agent according to claim 1, characterized in that, The mass ratio of the strength material to the adhesive material is 0.2 to 7.
3. The audible acoustic coupling agent according to claim 1, characterized in that, The strength material includes one or more of the following: glass fiber powder, carbon fiber powder, wood powder, bamboo powder, metal oxide powder, graphene powder, diamond powder, nano-silica, carbon nanotubes, zirconium silicate powder, and silicon carbide powder.
4. The audible acoustic coupling agent according to claim 1, characterized in that, The adhesive material includes one or more of the following: lubricating oil, silicone oil, and liquid rubber.
5. The audible acoustic coupling agent according to claim 4, characterized in that, The adhesive material also includes a thickener.
6. The audible acoustic coupling agent according to claim 1, characterized in that, The strength material includes carbon nanotubes, and the adhesive material includes silicone oil or fully synthetic lubricant. The audible acoustic coupling agent comprises: 2-4 parts by weight of carbon nanotubes and 10 parts by weight of silicone oil or fully synthetic lubricant.
7. The audible acoustic coupling agent according to claim 1, characterized in that, The strength material includes nano-silica, and the adhesive material includes silicone oil or fully synthetic lubricating oil. The audible acoustic coupling agent comprises: 5-15 parts by weight of nano-silica and 10 parts by weight of silicone oil or fully synthetic lubricating oil.
8. The audible acoustic coupling agent according to claim 1, characterized in that, The strength material includes bamboo powder, and the adhesive material includes silicone oil or fully synthetic lubricant. The audible acoustic coupling agent comprises: 3-5 parts by weight of bamboo powder and 6 parts by weight of silicone oil or fully synthetic lubricant.
9. The audible acoustic coupling agent according to claim 1, characterized in that, The strength material includes glass fiber powder, and the adhesive material includes silicone oil or fully synthetic lubricant. The audible acoustic coupling agent comprises: 3-6 parts by weight of glass fiber powder and 1 part by weight of silicone oil or fully synthetic lubricant.
10. A method for preparing an audible acoustic coupling agent as described in any one of claims 1 to 9, characterized in that, include: At room temperature, slowly add a portion of the strength material to the adhesive material while continuously stirring to ensure even mixing before adding the remaining strength material. Once all the strength material has been added, stir until completely homogeneous.
11. A method of using an audible acoustic coupling agent as described in any one of claims 1 to 9, characterized in that, include: The audible acoustic coupling agent is pressed into a sheet of uniform thickness, the thickness of which is greater than the maximum gap width of the acoustic interface. The thin sheet is cut into small pieces that perfectly match the shape of the acoustic interface; The small piece is attached to one side of the acoustic interface and pressed firmly. Press the acoustic interface tightly; Wipe away the audible acoustic coupling agent that has spilled out of the acoustic interface.