Multi-band resonant high-fidelity player
By using a two-stage acoustic cavity and a multi-frequency resonant diaphragm design, the shortcomings of mid-to-low-end audio players in terms of audio fidelity are solved, achieving higher fidelity playback effects and simplifying the manufacturing process.
Patent Information
- Application Number
- CN202423263568.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Existing mid-to-low-end audio players have deficiencies in audio fidelity, mainly because the mechanical structure design prioritizes low cost and ignores the impact of material properties on playback performance, resulting in inaccurate selection of frequency resonance points and causing the playback effect to deviate from the true sound.
It adopts a two-stage acoustic cavity and multi-frequency resonant diaphragm structure, combined with the design of elastic and rigid materials, and achieves continuous multi-frequency sound wave resonance through the design of different sizes and resonant frequencies, thereby enhancing the playback effect.
It achieves higher fidelity playback by improving the continuity and richness of frequency response through mechanical structural gains, avoiding quality degradation caused by material degradation, and simplifying the manufacturing process.
Smart Images
Figure CN223624738U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a multi-band resonant high-fidelity player, and more specifically, to a multi-frequency diaphragm + multi-level resonant cavity structure that utilizes continuous multi-band amplitude enhancement to achieve a more faithful playback effect. Background Technology
[0002] Audio playback technology is the core of an audio player, primarily involving the fidelity processing of electrical signals and the tuning of the player's mechanical structure and audio frequencies. The design of the player's mechanical structure, in particular, involves interdisciplinary fields such as acoustics, mechanics, aerodynamics, and materials science, and has always been considered a highly challenging technology. Few people are qualified to perform this task, and it is often regarded as a "master-level" technical field by audiophiles. The current ecosystem in this field is characterized by a large amount of research-based theory, but fewer applicable theories, and even fewer reliable calculation methods and mature models to support design. Some preliminary calculation models even require significant fees.
[0003] Traditional technologies and products, exemplified by traditional large-diameter speakers, are typically developed through extensive experimentation and repeated improvements by highly specialized personnel. These are often considered "masterpiece" products, with stringent requirements for materials, dimensions, and design, resulting in higher costs. In recent years, however, with the significant reduction in the size of full-spectrum loudspeakers and the substantial increase in chip integration, small and micro players have become the preferred choice for mid-to-low-end consumer scenarios due to their lower price, smaller physical space, and superior playback quality.
[0004] Due to technological advancements and price advantages, market demand is enormous, inevitably leading to inconsistencies in quality. Besides issues with electronic circuitry, the main reason lies in the mechanical structure's reliance on borrowed designs and the pursuit of low-cost materials, intentionally or unintentionally neglecting the impact of material properties on playback quality. Limited by small-size requirements, current structural designs often use a base size of 340mm (related to the speed of sound in air, 340m / sec), divided by a certain integer. Traditional wall-based sound absorption methods are then used to prevent the propagation of non-target frequency sound waves within the cavity, thereby achieving resonance at one or more discontinuous frequency points to obtain the desired playback effect.
[0005] The selection of the aforementioned frequency resonance points targets the frequencies most sensitive to most people's hearing. In other words, the structural design aims to enhance the frequencies most sensitive to most people's hearing, thereby achieving a virtual playback effect, similar to how early audio technology intentionally added high-amplitude low frequencies to a certain low-frequency band to achieve a deep bass effect.
[0006] In addition, traditional player technology often uses a sponge layer inside the sound cavity to absorb sound or soften the rebound, or roughens the inner wall of the sound cavity to make it bounce irregularly on the sound waves, thereby achieving the purpose of softening the rebound. However, over time, the elasticity of the sponge layer changes or it becomes brittle, and the micro-dimensional changes in the inner wall of the sound cavity caused by electrostatic dust attraction cause its response to sound waves to change, resulting in a deviation in the playback effect.
[0007] In conclusion, traditional mid-to-low-end player technology achieves audio fidelity by enhancing one or more discontinuous frequency points to create a "facade effect," thus deceiving the listener without providing sufficient fidelity. This is a technological deficiency, at least in many mid-to-low-end players, and overcoming these deficiencies is precisely where market demand lies. Summary of the Invention
[0008] This invention addresses the technical deficiencies of existing low-to-mid-range audio players and meets market demands by providing a near-full-band high-fidelity playback structure to solve existing technical problems.
[0009] Based on practical needs, one or more embodiments of this specification provide a multi-band resonant high-fidelity player, overcoming the limitations and defects of the current technology listed in the background section, and providing a practical solution. The technical solution of this utility model is as follows:
[0010] The present invention provides a multi-band resonant high-fidelity player, comprising a sound-permeable protective mesh, a speaker, a primary sound cavity, a multi-frequency resonant diaphragm, a secondary sound cavity, and a circuit board;
[0011] The loudspeaker is fixed to one end of the primary acoustic cavity in a driving-side inward direction and is electrically connected to the circuit board.
[0012] The multi-frequency resonant diaphragm is an elastic sheet structure that is installed between the primary sound cavity and the secondary sound cavity to isolate the primary sound cavity from the secondary sound cavity.
[0013] The primary and secondary acoustic cavities have different internal dimensions in the axial direction;
[0014] The circuit board is fixed to the end of the secondary acoustic cavity that is furthest from the multi-frequency resonant diaphragm;
[0015] The sound-permeable protective mesh is fixed to one end of the primary acoustic cavity where the loudspeaker is installed, serving as a protective cover for the loudspeaker and a sound-emitting channel.
[0016] This scheme, as a basic design, uses a structure of two-stage acoustic cavities of different sizes and a multi-frequency resonant diaphragm to enrich the distribution of resonant frequencies, enabling continuous, wide-band sound waves to resonate, thereby achieving a better and more faithful playback effect. Because the realization of continuous, wide-band resonance can achieve sound wave gain from a mechanical structure perspective, a greater sound intensity can be obtained under the premise of the same electrical power drive.
[0017] As a further technical solution, the loudspeaker is provided with an elastic rubber sheet or a hard sponge sheet between itself and the primary acoustic cavity.
[0018] This solution, based on the basic solution, adds an elastic rubber sheet or a hard sponge sheet between the speaker and the acoustic cavity, which strengthens the seal between the speaker and the acoustic cavity, helps to enhance the resonance effect, improve the mechanical gain, and, more importantly, can prevent noise caused by relative vibration between the speaker and the acoustic cavity.
[0019] As a further technical solution, an elastic rubber sheet or a rigid sponge sheet is provided between the primary acoustic cavity and the multi-frequency resonant diaphragm.
[0020] Similarly, this design strengthens the seal between the primary acoustic cavity and the multi-frequency resonant diaphragm, which helps to enhance the resonance effect, increase the mechanical gain, and, more importantly, prevent noise caused by the relative vibration between the two.
[0021] As a further technical solution, an elastic rubber sheet or a rigid sponge sheet is provided between the multi-frequency resonant diaphragm and the secondary acoustic cavity.
[0022] Similarly, this design strengthens the seal between the multi-frequency resonant diaphragm and the secondary acoustic cavity, which helps to enhance the resonance effect, increase the mechanical gain, and, more importantly, prevent noise caused by the relative vibration between the two.
[0023] As a further technical solution, a fixing frame is provided between the primary sound cavity and the secondary sound cavity to connect and fix the primary sound cavity, the multi-frequency resonant diaphragm, and the secondary sound cavity; the fixing frame is used to fix the primary sound cavity, the secondary sound cavity, and the multi-frequency resonant diaphragm together, and has a small-large-small two-dimensional variable diameter structure, made of plastic material; at the two back-to-back small diameter ends of the fixing frame, screw holes are respectively provided for fixing the primary sound cavity and the secondary sound cavity; at the center of the fixing frame, a fixing hole is provided for fixing the multi-frequency resonant diaphragm.
[0024] This solution provides a practical method for reliably fixing the primary acoustic cavity, multi-frequency resonant diaphragm, and secondary acoustic cavity using a fixed frame. It ensures reliable fixing of the three components and simplifies the mass production process, thus helping to improve production efficiency.
[0025] As a further technical solution, the multi-frequency resonant membrane is composed of a flat fixing ring, a flat resonant plate, and a connecting diaphragm connecting the two; the fixing ring is provided with multiple through holes for fixing, the resonant plate is circular and made of a smooth and flat rigid material, and is fixed in the center of the resonant plate; the connecting diaphragm is a connector between the fixing ring and the resonant plate, and is made of a flexible material.
[0026] This solution provides a single singularity resonance technology (single singularity multi-frequency resonant diaphragm), which involves setting up a resonant plate that interacts with the elastic parameters of the connecting diaphragm to achieve a continuous frequency band with continuously changing gain centered on the frequency point. When combined with two-stage acoustic cavities with different resonant frequencies, a richer range of resonant frequencies than traditional technologies can be obtained, resulting in superior playback performance.
[0027] As a further technical solution, the multi-frequency resonant membrane is composed of a flat fixing ring, a flat resonant plate, and a connecting diaphragm connecting the two; the fixing ring is provided with multiple through holes for fixing; the resonant plate and the connecting diaphragm are arranged in a concentric circle multi-ring structure, that is, arranged in a cyclical sequence from the outside to the inside, with a circular connecting diaphragm, a circular resonant plate, a circular connecting diaphragm, etc., until the central resonant plate is circular; the connecting diaphragm is the connecting piece between the fixing ring and the multi-ring resonant plate, and is made of a flexible material.
[0028] Based on the single singularity resonance technology mentioned above, this solution further provides a multi-frequency resonant film technology with multi-singularity resonance performance (multi-singularity multi-frequency resonant film). Multiple interconnected resonant films constructed using multiple concentric circle structures have different sizes and masses (weights), which determines that their resonant frequencies are different. This makes the player's resonant frequencies richer and the fidelity effect better.
[0029] Preferably, there are multiple connecting diaphragms, and each connecting diaphragm has a different elasticity.
[0030] This scheme achieves resonant frequency control of multiple resonators by adjusting the elasticity of the connecting diaphragms. Under the condition that the size of the resonators is limited, the resonant frequency of each resonator can be controlled by adjusting the elasticity of the connecting diaphragms to achieve the target value.
[0031] As a further technical solution, the loudspeaker's diaphragm is composed of a flat fixing ring, a flat resonant plate, and a connecting diaphragm connecting the two; the fixing ring has multiple through holes for fixing; the resonant plate and the connecting diaphragm are arranged in a concentric circle multi-ring structure, that is, arranged in a cyclical sequence from the outside to the inside, with a circular connecting diaphragm, a circular resonant plate, a circular connecting diaphragm, etc., until a circular central resonant plate is in the center; the connecting diaphragm is the connecting piece between the fixing ring and the multi-ring resonant plate, and is made of a flexible material.
[0032] This solution applies the aforementioned multi-singularity multi-frequency resonant diaphragm technology to the diaphragm of a loudspeaker, enabling the loudspeaker to act as a sound wave source. The output source sound wave then has a richer range of resonant frequencies, thereby achieving a wider frequency influence, making the source sound wave more faithful, and optimizing the playback effect from the source.
[0033] As a further technical solution, the primary and secondary sound cavities are made of aluminum alloy material through extrusion and post-processing, and their interiors are smooth.
[0034] This solution abandons the traditional technique of adding sponge material or roughening the inner wall of the sound cavity. Instead, by using a metal sound cavity, the cavity wall becomes more rigid, which helps to improve the mechanical gain in sound wave resonance, simplifies the manufacturing process, and improves the mechanical strength of the player. Attached Figure Description
[0035] The present embodiment will be further described below with reference to the accompanying drawings and examples. In the accompanying drawings:
[0036] Figure 1 A schematic diagram of the structure of a multi-band resonant high-fidelity player based on the fundamental scheme;
[0037] Figure 2 This is a schematic diagram of the structure of a single singularity multi-frequency resonant membrane. Detailed Implementation
[0038] Example 1 – Multi-band resonant high-fidelity player based on the basic scheme
[0039] like Figure 1 As shown, the player consists of a sound-permeable protective mesh 1, a speaker 2, a primary acoustic cavity 3, a mounting frame 4, a multi-frequency resonant diaphragm 5, a diaphragm pressure plate 6, a secondary acoustic cavity 7, a circuit board 8, and a base. Among them:
[0040] The axial dimensions of primary acoustic cavity 3 and secondary acoustic cavity 7 are different;
[0041] The loudspeaker 2 is installed inside the upper cavity 31 of the primary sound cavity 3 and is fixed to the primary sound cavity 3 by screws through the through holes at its four corners;
[0042] The sound-permeable protective mesh 1 is a metal mesh structure that is press-fitted into the fastening edge 32 of the primary acoustic cavity 3;
[0043] The central opening of the mounting bracket 4 is used to install the multi-frequency resonant diaphragm 5. The multi-frequency resonant diaphragm 5 is clamped between the mounting bracket 4 and the diaphragm pressure plate 6 using a diaphragm clamping plate 6, and then fixed with screws.
[0044] The fixing bracket 4 is inserted into the other port of the primary sound cavity 3 through the reduced diameter 41, and is fixed to the primary sound cavity 3 by the upper stud 42 using a wire.
[0045] The reduced diameter of the other end of the mounting bracket 4 is inserted into the port of the secondary acoustic cavity 7 and fixed to the secondary acoustic cavity 7 with screws through the lower stud 43;
[0046] The circuit board 8 is fixed to the base 9 with screws, and then the base 9 is fixed to the lower port of the secondary sound chamber 7.
[0047] During operation, speaker 2 pushes air to generate sound waves. The front sound waves radiate outwards through the sound-permeable protective mesh 1, producing sound. The rear sound waves are constrained by the primary acoustic cavity 3 and travel along the sound wave axis towards the mounting frame 4. They are blocked by the mounting frame 4 and the multi-frequency resonant diaphragm 5. Because the mounting frame 4 is made of rigid plastic, the sound waves are obstructed. However, if... Figure 2 As shown, the multi-frequency resonant diaphragm 5, located in the center of the mounting frame 4, is composed of a rigid pressure ring 51, a flexible connecting diaphragm 52, and a rigid resonant plate 53. Due to the elasticity of the connecting diaphragm 52, the multi-frequency resonant diaphragm 5, under the impact of sound waves, matches the axial dimensions of the primary acoustic cavity 3, selectively resonating with sound waves of the same resonant frequency. The resonant sound waves bounce back to the speaker 2, applying to the speaker diaphragm and amplifying its vibration. This resonance creates mechanical gain, enhancing the playback effect. Simultaneously, due to the frequency selection of the multi-frequency resonant diaphragm 5, the resonance is more pronounced within the range covered by its resonant frequency, allowing for targeted improvement of playback performance in certain frequency bands.
[0048] The connecting diaphragm 52 of the multi-frequency resonant diaphragm 5 has multi-frequency characteristics or a wide frequency response in terms of size and elasticity. Therefore, through the action of the multi-frequency resonant diaphragm 5, and with the cooperation of the primary acoustic cavity 3, a preliminary multi-frequency sound wave gain is obtained.
[0049] Simultaneously, the vibration of the multi-frequency resonant diaphragm 5 under the influence of sound waves also generates sound waves within the secondary acoustic cavity 7. These sound waves, at the other end of the secondary acoustic cavity 7, are reflected by the internal circuit board 8 and base 9, again generating sound wave superposition on the multi-frequency resonant diaphragm 5 and undergoing frequency selection. Because the axial dimensions of the secondary acoustic cavity 7 and the primary acoustic cavity 3 are different, the sound wave motion within the secondary acoustic cavity 7, after being coordinated with the multi-frequency resonant diaphragm 5, produces resonances different from those in the primary acoustic cavity 3. These resonances also reflect back to the diaphragm of the speaker 2, further enriching the sound waves emitted by the speaker through the sound-permeable protective mesh 1 with different frequencies, resulting in a richer playback effect.
[0050] Since both the two-stage acoustic cavity and the multi-frequency resonant diaphragm 5 in this embodiment are designed for the target frequency and its range, this embodiment can obtain mechanical gain over multiple and wide frequency ranges.
[0051] The advantages of implementing this embodiment are:
[0052] 1) Through the interaction of two-stage acoustic cavities and multi-frequency resonant diaphragms, multi-segment, wide-frequency mechanical gain is achieved, improving playback efficiency and fidelity;
[0053] 2) By designing two different sizes of the two-stage acoustic chambers, the resonance within the two-stage acoustic chambers is enriched, resulting in a better playback effect.
[0054] 3) The traditional technique of setting sound-absorbing cotton or roughness in the sound cavity is abandoned, which avoids the quality degradation caused by material alienation, improves the quality life, and simplifies the structure and manufacturing process.
[0055] Example 2 – A player employing a multi-single point resonant diaphragm
[0056] Unlike Embodiment 1, the multi-frequency resonant membrane 5 in this embodiment adopts multi-singularity multi-frequency resonance technology. That is, the resonant membrane is composed of a flat fixed ring, a flat resonant plate, and a connecting membrane connecting the two. The resonant plate and the connecting membrane are arranged in a concentric circle multi-ring structure, that is, from the outside to the inside, they are a circular connecting membrane - a circular resonant plate - a circular connecting membrane, and a central circular resonant plate. The connecting membrane is the connecting piece between the fixed ring and the multi-ring resonant plate and is made of flexible material.
[0057] In this embodiment, the multi-frequency resonant diaphragm 5 is composed of two concentric sets of resonant plates. Due to their different sizes, the center resonant frequencies of the two sets of resonant plates are different. This allows the multi-frequency resonant diaphragm 5 to have at least three operating frequency bands: the resonant frequency of the central resonant plate, the resonant frequency of the outer resonant plate, and a third resonant frequency formed by the superposition of the two sets of resonant plates. The richness of the resonant frequencies allows the multi-frequency resonant diaphragm 5 to respond to sound waves in more frequency bands. Combined with two acoustic cavities of different sizes, it achieves ideal mechanical gain in more frequency bands, resulting in better fidelity and higher playback efficiency. This is the advantage of implementing this embodiment.
[0058] In other embodiments, the multi-singularity multi-frequency resonance technology of this embodiment is applied to the diaphragm of the speaker, which can obtain a wider frequency response from the source of the sound wave, so that the sound wave can obtain wide frequency fidelity from the source, and further improve the playback effect of the player.
[0059] The foregoing has described specific embodiments of this specification; other embodiments are within the scope of the appended claims. In some cases, the structure described in the claims can be used to achieve the desired results according to the specific embodiments described above. Those skilled in the art can easily achieve the desired results by referring to the foregoing description and its design concepts according to the specific implementation.
[0060] The above description is merely one or more embodiments of this specification and is not intended to limit this specification. For those skilled in the art, the techniques of one or more embodiments of this specification can be combined in new ways to achieve new implementations, or various modifications and variations can be made. Any modifications, equivalent substitutions, improvements, technical combinations, etc., made within the spirit and principles of one or more embodiments of this specification should be included within the scope of the claims of this specification.
Claims
1. A multi-band resonant high-fidelity player, characterized in that, Includes acoustic protection mesh, loudspeaker, primary acoustic cavity, multi-frequency resonant diaphragm, secondary acoustic cavity, and circuit board; The loudspeaker is fixed to one end of the primary acoustic cavity in a driving-side inward direction and is electrically connected to the circuit board. The multi-frequency resonant diaphragm is an elastic sheet structure, installed between the primary and secondary acoustic cavities to isolate them. The primary and secondary acoustic cavities have different internal dimensions in the axial direction; The circuit board is fixed to the end of the secondary acoustic cavity that is furthest from the multi-frequency resonant diaphragm; The sound-permeable protective mesh is fixed to one end of the primary acoustic cavity where the loudspeaker is installed, serving as a protective cover for the loudspeaker and a sound-emitting channel.
2. A multi-band resonant high-fidelity player according to claim 1, characterized in that, The loudspeaker is provided with an elastic rubber sheet or a hard sponge sheet between itself and the primary acoustic cavity.
3. A multi-band resonant high-fidelity player according to claim 1, characterized in that, An elastic rubber sheet or a rigid sponge sheet is provided between the primary acoustic cavity and the multi-frequency resonant diaphragm.
4. A multi-band resonant high-fidelity player according to claim 1, characterized in that, An elastic rubber sheet or a rigid sponge sheet is provided between the multi-frequency resonant diaphragm and the secondary acoustic cavity.
5. A multi-band resonant high-fidelity player according to claim 1, characterized in that, Between the primary and secondary acoustic cavities, a fixing frame is provided to connect and fix the primary acoustic cavity, the multi-frequency resonant diaphragm, and the secondary acoustic cavity. The fixing frame is used to fix the primary acoustic cavity, the secondary acoustic cavity, and the multi-frequency resonant diaphragm together, and has a small-large-small two-stage variable diameter structure, made of plastic material. At the two back-to-back small diameter ends of the fixing frame, screw holes are respectively provided for fixing the primary acoustic cavity and the secondary acoustic cavity. At the center of the fixing frame, a fixing hole is provided for fixing the multi-frequency resonant diaphragm.
6. A multi-band resonant high-fidelity player according to claim 1, characterized in that, The multi-frequency resonant membrane is composed of a flat fixing ring, a flat resonant plate, and a connecting diaphragm connecting the two. The fixing ring has multiple through holes for fixing. The resonant plate is circular and made of a smooth and flat rigid material, and is fixed in the center of the resonant plate. The connecting diaphragm is the connector between the fixing ring and the resonant plate and is made of a flexible material.
7. A multi-band resonant high-fidelity player according to claim 1, characterized in that, The multi-frequency resonant membrane is composed of a flat fixing ring, a flat resonant plate, and a connecting diaphragm connecting the two. The fixing ring has multiple through holes for fixing. The resonant plate and the connecting diaphragm are arranged in a concentric circle multi-ring structure, that is, from the outside to the inside, there is a circular connecting diaphragm, a circular resonant plate, and another circular connecting diaphragm, and so on, until the central resonant plate is circular. The connecting diaphragm is the connector between the fixing ring and the multi-ring resonant plate and is made of flexible material.
8. A multi-band resonant high-fidelity player according to claim 7, characterized in that, There are multiple connecting diaphragms, and each connecting diaphragm has a different elasticity.
9. A multi-band resonant high-fidelity player according to claim 1, characterized in that, The loudspeaker's diaphragm is composed of a flat fixing ring, a flat resonant plate, and a connecting diaphragm connecting the two. The fixing ring has multiple through holes for fixing. The resonant plate and the connecting diaphragm are arranged in a concentric circle multi-ring structure, that is, arranged in a cyclical order from the outside to the inside, with a circular connecting diaphragm, a circular resonant plate, and another circular connecting diaphragm, until a circular central resonant plate is formed in the center. The connecting diaphragm is the connector between the fixing ring and the multi-ring resonant plate and is made of a flexible material.
10. A multi-band resonant high-fidelity player according to claim 1, characterized in that, The primary and secondary acoustic cavities are made of aluminum alloy material through extrusion and post-processing, and their interiors are smooth.