Inverter tube and speaker box

Abstract

This application provides a bass reflex port and a speaker enclosure, relating to the field of acoustic equipment technology. The bass reflex port includes: a tube body, one end of which is inserted through the speaker enclosure and communicates with the outside of the enclosure; the other end of the tube body extends into the interior of the enclosure; the end of the tube body inside the enclosure is designated as an inner end, which is configured as a first horn opening; a first porous element is provided on the outer side wall and / or inner side wall of the first horn opening, or the first horn opening is entirely configured as a second porous element. This bass reflex port and speaker enclosure, through the porous structure of the first or second porous element, improve airflow and absorb airflow noise, reducing airflow noise generated inside the tube body due to turbulence, friction, and abrupt changes, thereby improving the acoustic performance and sound quality of the speaker enclosure.

Description

Technical Field

[0001] This application relates to the field of acoustic equipment technology, and more particularly to a bass reflex port and speaker enclosure. Background Technology

[0002] A speaker is a device that converts electrical signals into sound. It is widely used in home entertainment, professional audio-visual systems, public address systems, and performance systems. The function of a speaker is to provide high-quality sound playback for various application scenarios.

[0003] In related technologies, a speaker enclosure includes a cabinet, a loudspeaker, and a bass reflex port. The loudspeaker is connected to the cabinet, one end of the bass reflex port passes through the cabinet and communicates with the outside of the cabinet, and the other end extends into the interior of the cabinet. By properly designing the dimensions of the cabinet and the bass reflex port, the sound waves radiated from the bass reflex port and the sound waves radiated from the front of the loudspeaker diaphragm are superimposed in phase at low frequencies, thereby enhancing bass output. When the speaker is working, the loudspeaker vibration pushes or draws air into the cabinet, which in turn causes high-speed airflow inside the bass reflex port. The airflow noise generated by this high-speed airflow seriously affects the sound quality of the speaker. To reduce airflow noise, both ends of the bass reflex port are usually designed as horn openings. The horn openings allow airflow to enter the bass reflex port more smoothly, reducing eddies and noise caused by sudden changes in airflow, thus effectively reducing airflow noise.

[0004] However, the horn only guides airflow through its shape and structure, which cannot effectively improve airflow and absorb the noise generated by the high-speed airflow inside the bass reflex tube, thus reducing the sound quality of the speaker. Summary of the Invention

[0005] This application provides a bass reflex port and a speaker enclosure to solve the technical problem that the horn opening only guides airflow through its shape, which cannot effectively improve airflow and absorb airflow noise generated by the high-speed airflow inside the bass reflex port, thus reducing the sound quality of the speaker enclosure.

[0006] In a first aspect, embodiments of this application provide a phase inverter, comprising:

[0007] The tube has one end for passing through the cabinet of the speaker and communicating with the outside of the cabinet, and the other end of the tube extends into the inside of the cabinet. The end of the tube inside the cabinet is set as the inner end, and the inner end is set as the first horn opening.

[0008] A first porous component is provided on the outer side wall and / or inner side wall of the first horn opening, or the first horn opening is entirely configured as a second porous component.

[0009] In some embodiments, a first porous element is provided on the outer sidewall and / or inner sidewall of the first flared opening;

[0010] Along the circumference of the first flared opening, at least a portion of the outer sidewall and / or inner sidewall of the first flared opening is provided with a receiving groove, and at least a portion of the receiving groove is used to correspondingly receive the first porous component.

[0011] In some embodiments, the receiving groove is disposed through the first flared opening on the side away from the outside of the housing.

[0012] In some embodiments, the thickness of the first porous element is greater than or equal to the depth of the receiving groove.

[0013] In some embodiments, the first horn opening is entirely configured as a second multi-hole component;

[0014] The side of the second porous component away from the outside of the housing is configured with a first serrated structure.

[0015] In some embodiments, the first porous component or the second porous component is configured as a first foam component, a first fiber component, a first granular component, or a first metal component.

[0016] In some embodiments, the end of the tube near the outside of the housing is designated as an outer end, and the outer end is designated as a second flared opening;

[0017] A third porous component is provided on the outer side wall and / or inner side wall of the second flared opening, or the second flared opening is provided as a fourth porous component.

[0018] In some embodiments, the second horn opening is configured as a fourth porous component, and the side of the fourth porous component near the outside of the housing is configured as a second serrated structure.

[0019] In some embodiments, the third porous element or the fourth porous element is configured as a second foam element, a second fiber element, a second granular element, or a second metal element.

[0020] Secondly, this application provides a speaker, including a cabinet and the aforementioned bass reflex tube, wherein the end of the bass reflex tube located inside the cabinet is configured as an inner end.

[0021] This application provides a bass reflex port and a speaker enclosure. The bass reflex port provided by this application, by employing a first porous component or by setting the first horn opening as a second porous component, can absorb the noise generated by the airflow during the process of airflow entering and exiting the first horn opening by utilizing the porous structure of the first or second porous component. This reduces the airflow noise generated by turbulence, friction, and sudden changes in the airflow inside the tube, thereby reducing the noise during tube operation from the sound source level. At the same time, it retains the guiding function of the traditional horn opening for airflow, making the airflow smoother. In addition to expanding the low-frequency response of the speaker enclosure and improving the bass effect, it improves the acoustic performance and listening quality of the speaker enclosure. Attached Figure Description

[0022] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0023] Figure 1 A schematic diagram of the structure of the phase inverter tube provided in this application;

[0024] Figure 2 A schematic diagram of the structure of the phase inverter tube body, the first flared end, and the receiving groove provided in this application;

[0025] Figure 3 A partial structural diagram of the receiving groove and the first porous component of the phase inverter provided in this application. Figure 1 ;

[0026] Figure 4 A partial structural diagram of the receiving groove and the first porous component of the phase inverter provided in this application. Figure 2 ;

[0027] Figure 5 A partial structural diagram of the receiving groove and the first porous component of the phase inverter provided in this application. Figure 3 ;

[0028] Figure 6 A partial structural diagram of the receiving groove and the first porous component of the phase inverter provided in this application. Figure 4 ;

[0029] Figure 7 A partial structural schematic diagram of the tube body and the second porous component provided in this application;

[0030] Figure 8 A partial structural schematic diagram of the tube body, the second porous component, and the first serrated structure of the phase inverter provided in this application;

[0031] Figure 9 A schematic diagram of the structure of the phase inverter tube and the second flare provided in this application;

[0032] Figure 10 A cross-sectional structural diagram of the second flared end and the third porous component of the phase inverter provided in this application;

[0033] Figure 11 A cross-sectional structural diagram of the second flared end and the fourth porous component of the phase inverter provided in this application;

[0034] Figure 12 A cross-sectional structural diagram of the second flared end, the fourth porous component, and the second sawtooth structure of the phase inverter provided in this application;

[0035] Figure 13The airflow noise sound pressure level spectrum of the phase inverter provided in this application Figure 1 ;

[0036] Figure 14 The airflow noise sound pressure level spectrum of the phase inverter provided in this application Figure 2 .

[0037] Explanation of reference numerals in the attached figures:

[0038] 100. Tube body; 110. First flared mouth; 111. First perforated component; 120. Receiving groove;

[0039] 130. Second flared mouth; 131. Third multi-hole component;

[0040] 200. First sawtooth structure;

[0041] 300. Second sawtooth structure;

[0042] 400. Box body.

[0043] The accompanying drawings have illustrated specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0044] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0045] In related technologies, a speaker enclosure includes a cabinet, a loudspeaker, and a bass reflex port. The loudspeaker is connected to the cabinet, one end of the bass reflex port passes through the cabinet and communicates with the outside of the cabinet, and the other end extends into the interior of the cabinet. By properly designing the dimensions of the cabinet and the bass reflex port, the sound waves radiated from the bass reflex port and the sound waves radiated from the front of the loudspeaker diaphragm are superimposed in phase at low frequencies, thereby enhancing bass output. When the speaker is working, the loudspeaker vibration pushes or draws air into the cabinet, which in turn causes high-speed airflow inside the bass reflex port. The airflow noise generated by this high-speed airflow seriously affects the sound quality of the speaker. To reduce airflow noise, both ends of the bass reflex port are usually designed as horn openings. The horn openings allow airflow to enter the bass reflex port more smoothly, reducing eddies and noise caused by sudden changes in airflow, thus effectively reducing airflow noise.

[0046] However, traditional speaker openings rely solely on their shape to physically guide airflow, lacking sound absorption and noise reduction capabilities. They cannot effectively absorb the airflow noise generated by friction, turbulence, and pressure fluctuations when airflow moves at high speed inside the bass reflex port. This noise is superimposed on normal sound, degrading the speaker's sound quality. In particular, airflow noise is more noticeable at high volumes and dynamic ranges, affecting the listening experience.

[0047] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0048] Combination Figure 1 , Figure 2 and Figure 3 This application provides a bass reflex tube, including a tube body 100. One end of the tube body 100 is used to pass through the cabinet 400 of a speaker and communicate with the outside of the cabinet 400. The other end of the tube body 100 extends into the inside of the cabinet 400. The end of the tube body 100 located inside the cabinet 400 is set as the inner end, and the inner end is set as the first horn mouth 110.

[0049] A first porous component 111 is provided on the outer side wall and / or inner side wall of the first flared opening 110, or the first flared opening 110 is configured as a second porous component.

[0050] Combination Figure 3 , Figure 4 , Figure 5 and Figure 6 In some embodiments, a first porous element 111 is provided on the outer wall of the first horn opening 110. When the speaker is working, the speaker vibration drives the air inside the enclosure 400 to move. The airflow inside the enclosure 400 enters the interior of the tube 100 through the inner end of the tube 100, i.e., the first horn opening 110, and is finally guided to the outside of the enclosure 400 through the tube 100. Alternatively, the speaker vibration draws air from the enclosure 400, and the external airflow enters the enclosure 400 through the tube 100. When the airflow enters or exits the first horn opening 110, the first porous element 111 on the outer wall of the first horn opening 110 can improve the airflow on the inner side of the enclosure 400 near the first horn opening 110 and absorb turbulent noise, reduce unnecessary turbulent noise, and improve sound quality.

[0051] In some embodiments, a first porous element 111 is provided on the inner sidewall of the first horn opening 110. When the speaker is working, the speaker vibration drives the air inside the cabinet 400 to move. The airflow inside the cabinet 400 enters the interior of the tube 100 through the inner end of the tube 100, i.e., the first horn opening 110, and is finally guided to the outside of the cabinet 400 through the tube 100. Alternatively, the speaker vibration draws air from the cabinet 400, and the external airflow enters the cabinet 400 through the tube 100. During the flow of the airflow through the inner sidewall of the first horn opening 110, the first porous element 111 on the inner sidewall directly contacts the high-speed airflow, which can change the turbulent pulsation generated by the airflow on the wall of the tube 100 and absorb the turbulent noise caused by the airflow, thereby reducing the airflow noise and improving the sound quality of the speaker.

[0052] In some embodiments, a first porous element 111 is provided on both the outer and inner sidewalls of the first horn opening 110. When the speaker is working, the speaker vibration drives the air movement inside the cabinet 400. The airflow inside the cabinet 400 enters the interior of the tube 100 through the inner end of the tube 100, i.e., the first horn opening 110, and is finally guided to the outside of the cabinet 400 through the tube 100. Alternatively, the speaker vibration draws air movement from inside the cabinet 400, and the external airflow enters the cabinet 400 through the tube 100. The first porous element 111 on the outer sidewall of the first horn opening 110 can improve the flow near the first horn opening 110 on the inner side of the cabinet 400 in advance, directly changing the airflow noise source to reduce noise. The first porous element 111 on the inner sidewall of the first horn opening 110 further absorbs the noise generated by the airflow in the tube. The combination of internal and external absorption achieves dual absorption and suppression of airflow noise, reducing the airflow noise when the tube 100 is working, making the sound playback purer and the bass effect clearer.

[0053] like Figure 7 As shown, in some embodiments, the first horn opening 110 is entirely a second porous component. When the speaker is working, the speaker vibration drives the air inside the enclosure 400 to move. The airflow inside the enclosure 400 enters the interior of the tube 100 through the inner end of the tube 100, i.e., the first horn opening 110, and is finally guided to the outside of the enclosure 400 through the tube 100. Alternatively, the speaker vibration draws air from the enclosure 400, and the external airflow enters the enclosure 400 through the tube 100. Since the first horn opening 110 is entirely made of a second porous component, the first horn opening 110 has a porous sound absorption and noise reduction structure. It can improve the airflow in all directions during the entire process of airflow entering or leaving the first horn opening 110, and absorb and dissipate airflow noise, giving full play to the noise reduction effect of the porous material, eliminating the noise generated by the high-speed airflow in the tube 100, and improving the sound quality and smoothness of the speaker during low-frequency playback.

[0054] Combination Figure 3 , Figure 4 , Figure 5 and Figure 6A first porous component 111 is provided on the outer side wall and / or inner side wall of the first flared mouth 110;

[0055] Along the circumference of the first flared opening 110, at least a portion of the outer sidewall and / or inner sidewall of the first flared opening 110 is provided with a receiving groove 120, and at least a portion of the receiving groove 120 is used to correspondingly receive the first porous member 111.

[0056] like Figure 3 As shown, in some embodiments, a receiving groove 120 is provided around the entire circumference of the first horn opening 110 on the outer wall of the first horn opening 110. The receiving groove 120 surrounds the entire outer circumference of the first horn opening 110, and a full circle of first porous members 111 is correspondingly provided in the receiving groove 120. The receiving groove 120 can provide installation space for the first porous members 111, preventing the first porous members 111 from directly protruding from the outer wall surface of the first horn opening 110 and occupying extra space. It also prevents the tube body 100 from interfering with the speaker, circuit support or the inner wall of the enclosure 400 during operation. At the same time, the first porous members 111 can also prevent the first horn opening 110 from colliding with the speaker, circuit support or the inner wall of the enclosure 400 and generating vibration noise. In addition, the full circle of first porous members 111 can absorb airflow noise in all directions and improve airflow, thereby reducing airflow noise.

[0057] like Figure 4 As shown, in some embodiments, a receiving groove 120 is provided around the entire circumference of the first horn opening 110 on the outer side wall of the first horn opening 110. The receiving groove 120 surrounds the entire outer circumference of the first horn opening 110, and a semi-circular first porous component 111 is provided inside the receiving groove 120. The receiving groove 120 provides installation space for the first porous component 111, preventing the first porous component 111 from protruding outward and interfering with the inner wall of the speaker, circuit support, or enclosure 400. At the same time, the first porous component 111 can also prevent the first horn opening 110 from colliding with the inner wall of the speaker, circuit support, or enclosure 400 and generating vibration noise. In addition, the semi-circular first porous component 111 can simplify the structural layout and reduce the assembly complexity while ensuring local noise reduction effect.

[0058] like Figure 5As shown, in some embodiments, a semi-circular receiving groove 120 is provided on the outer wall of the first horn opening 110 along the circumference of the first horn opening 110. A semi-circular first porous component 111 is correspondingly provided in the receiving groove 120. The receiving groove 120 is located on the side of the first horn opening 110 near the speaker, circuit support, or inner wall of the enclosure 400. The receiving groove 120 can provide installation space for the first porous component 111, preventing the first porous component 111 from being directly attached to the outer wall surface and occupying external space, and preventing interference with the inner wall of the speaker, circuit support, or enclosure 400. At the same time, the first porous component 111 can also prevent the first horn opening 110 from colliding with the inner wall of the speaker, circuit support, or enclosure 400 and generating vibration noise. Meanwhile, the semi-circular receiving groove 120 matches the semi-circular first porous component 111, saving the cost of the first porous component 111 and reducing the processing difficulty of the receiving groove 120. Under the premise of meeting the requirements of directional noise reduction, the structure can be further simplified and the processing and assembly efficiency can be improved.

[0059] like Figure 6 As shown, in some embodiments, a receiving groove 120 is provided around the entire circumference of the first horn opening 110 on the inner sidewall of the first horn opening 110. The receiving groove 120 surrounds the entire inner circumference of the first horn opening 110, and a first porous element 111 is correspondingly provided in the receiving groove 120. During the process of airflow passing through the inner sidewall of the first horn opening 110, the first porous element 111 on the inner sidewall directly contacts the high-speed airflow, which can improve the flow, reduce the turbulent pulsation generated by the airflow on the wall of the tube body 100, and absorb the turbulent noise generated when the airflow flows inside the tube body 100, weaken the noise formed by the airflow inside the tube, and make the airflow inside the tube body 100 more stable and quiet, thereby improving the overall sound quality of the speaker.

[0060] In other embodiments, the perimeter of the receiving groove 120 and the perimeter of the first porous member 111 can be adaptively adjusted as needed, for example, the receiving groove 120 can be set to a quarter circle and the first porous member 111 can be set to a quarter circle.

[0061] Combination Figure 3 , Figure 4 , Figure 5 and Figure 6 The receiving groove 120 is located on the side of the housing 400 away from the outside of the first horn opening 110.

[0062] By adopting the above technical solution, the receiving groove 120 is set through the first horn opening 110 along the axial direction of the first horn opening 110, with the side away from the outside of the cabinet 400 extending through the first horn opening 110. This makes the receiving groove 120 form an open structure on the side where the airflow enters the first horn opening 110. When the airflow in the cabinet 400 enters or exits the tube 100 along the first horn opening 110, the airflow can directly pass through the first porous component 111 in the receiving groove 120, increasing the contact area and contact efficiency between the airflow and noise and the first porous component 111. This enhances the improvement of airflow and the absorption effect of the porous structure of the first porous component 111 on the porous structure. At the same time, this through-type structure can prevent the receiving groove 120 from blocking and disturbing the airflow, making the airflow smoother and more unobstructed when entering the first horn opening 110, further reducing the generation of eddies, and further optimizing the sound quality and listening experience of the speaker.

[0063] Combination Figure 3 , Figure 4 , Figure 5 and Figure 6 The thickness of the first porous component 111 is greater than or equal to the depth of the receiving groove 120.

[0064] In some embodiments, the thickness of the first porous member 111 is greater than the depth of the receiving groove 120 along the radial direction of the first flare 110. When the thickness of the first porous member 111 is greater than the depth of the receiving groove 120, a thicker first porous member 111 can be used to improve the absorption capacity of airflow noise and enhance the noise reduction effect.

[0065] In some embodiments, along the radial direction of the first horn opening 110, the thickness of the first porous member 111 is equal to the depth of the receiving groove 120; when the thickness of the first porous member 111 is equal to the depth of the receiving groove 120, the outer surface of the first porous member 111 is adapted to be flush with the outer wall surface of the first horn opening 110 and will not protrude outside the receiving groove 120, preventing the first porous member 111 from occupying extra space and preventing the first porous member 111 from interfering with the speaker, circuit support or enclosure 400.

[0066] Combination Figure 7 and Figure 8 The first horn opening 110 is configured as a second multi-hole component;

[0067] The side of the second porous component away from the housing 400 is configured as the first serrated structure 200.

[0068] In this embodiment, a plurality of first grooves are provided along the circumference of the second porous component on the side away from the housing 400. Each first groove is V-shaped to form a first serrated structure 200 on the side of the second porous component away from the housing 400. In other embodiments, by adjusting the shape of the first grooves, different structures can be formed on the side of the second porous component away from the housing 400, such as setting the first grooves as U-shaped, triangular, or rectangular.

[0069] By adopting the above technical solution, the first sawtooth structure 200 can divide the continuous jet shear layer formed when the airflow enters or exits the first horn mouth 110 into multiple small, independent local shear layers, suppressing the generation of large-scale eddies and reducing eddy noise from the source of airflow disturbance. At the same time, the first horn mouth 110, which is an integral second porous component, can fully absorb the noise generated when the airflow passes through by utilizing its own porous sound absorption characteristics. While retaining the traditional first horn mouth 110's ability to expand low-frequency response and enhance bass effect, it further reduces the airflow noise of the tube body 100, making the speaker sound purer and the bass clearer.

[0070] The first porous component 111 or the second porous component is configured as a first foam component, a first fiber component, a first granular component, or a first metal component.

[0071] In this embodiment, the first foam component is EVA foam, PU foam, PE foam, PP foam, NBR foam or EPDM foam. The material of the first foam component is lightweight and soft, has high porosity, stable sound absorption performance, and good buffering and vibration reduction characteristics. It is easy to fit and install and is not prone to structural resonance.

[0072] The first fiber component is made of polyester fiber, melamine sound-absorbing cotton, glass fiber cotton, or rock wool. The interconnected pores formed by the interlacing of the fibers in the first fiber component can efficiently dissipate sound energy, are resistant to high temperature and aging, and have excellent sound absorption and noise reduction effects in a wide frequency range.

[0073] The first particle is made of porous ceramic particles, expanded perlite particles, or porous mineral wool particles. The first particle has high structural strength and stable physical properties. It can absorb and dissipate airflow noise through the porous channels formed between the particles, making it suitable for long-term stable working scenarios.

[0074] The first metal component is made of foamed aluminum, foamed copper, porous stainless steel, or porous titanium alloy. The porous structure of the first metal component combines high structural strength with good heat dissipation, outstanding sound absorption, noise reduction, and impact resistance, and excellent durability and reliability, which can meet the needs of the speaker under high power and high dynamic conditions.

[0075] Combination Figure 9 , Figure 10 , Figure 11 and Figure 12The end of the tube body 100 near the outside of the box body 400 is designated as the outer end, and the outer end is designated as the second flared mouth 130;

[0076] A third porous element 131 is provided on the outer side wall and / or inner side wall of the second flared opening 130, or the second flared opening 130 is provided as a fourth porous element.

[0077] In some embodiments, a third porous element 131 is provided on the outer wall of the second horn opening 130. When the speaker is working, the speaker vibration drives the air movement inside the cabinet 400. The airflow inside the cabinet 400 enters the tube 100 through the inner end and flows along the tube 100 to the outer end near the outside of the cabinet 400, and is finally guided to the outside of the cabinet 400 from the outer end. Alternatively, the speaker vibration draws air movement from the cabinet 400, and the external airflow flows into the tube 100 through the outer end of the tube 100 and then into the cabinet 400. When the airflow flows out or into the second horn opening 130, the third porous element 131 on the outer wall of the second horn opening 130 can improve the flow, reduce the airflow noise from the airflow noise source, reduce the jet noise generated by the interaction between the airflow and the outside air when the airflow flows out of the tube 100, and at the same time, cooperate with the airflow guiding structure of the second horn opening 130 to make the airflow discharge smoothly, further reduce the overall airflow noise of the speaker, and optimize the listening quality.

[0078] like Figure 10 As shown, in some embodiments, a third porous element 131 is provided on the inner wall of the second horn opening 130. When the speaker is working, the speaker vibration drives the air movement inside the cabinet 400. The airflow inside the cabinet 400 enters the tube 100 through the inner end and flows along the tube 100 to the outer end near the outside of the cabinet 400. Finally, it is guided to the outside of the cabinet 400 from the outer end. Alternatively, the speaker vibration draws air movement from inside the cabinet 400, and the external airflow flows into the tube 100 through the outer end of the tube 100 and then into the cabinet 400. During the process of the airflow flowing through the inner wall of the second horn opening 130, the third porous element 131 on the inner wall directly contacts the high-speed airflow inside the tube 100, which can improve the flow, directly reduce turbulent pulsation, and effectively absorb turbulent noise, making the sound playback cleaner and clearer.

[0079] In some embodiments, a third porous element 131 is provided on both the outer and inner sidewalls of the second horn opening 130. When the speaker is working, the speaker vibration drives the air movement inside the cabinet 400. The airflow inside the cabinet 400 enters the tube 100 through the inner end and flows along the tube 100 to the outer end near the outside of the cabinet 400, and is finally guided to the outside of the cabinet 400 from the outer end. Alternatively, the speaker vibration draws air movement from inside the cabinet 400, and the external airflow flows into the tube 100 through the outer end of the tube 100 and then into the cabinet 400. The third porous element 131 on the inner sidewall of the second horn opening 130 can improve the flow, directly reduce turbulent pulsation, and absorb the airflow noise inside the tube 100. The third porous element 131 on the outer sidewall further improves the flow, reduces airflow noise from the airflow noise source, and achieves all-round suppression of airflow noise at the outer end through the cooperation of the inner and outer sides, thereby improving the purity and comfort of the speaker's low-frequency playback.

[0080] like Figure 11 As shown, in some embodiments, the second horn opening 130 is entirely configured as a fourth porous component. When the speaker is working, the speaker vibration drives the air movement inside the enclosure 400. The airflow inside the enclosure 400 enters the tube 100 through the inner end and flows along the tube 100 to the outer end near the outside of the enclosure 400, and is finally guided out of the enclosure 400 from the outer end. Alternatively, the speaker vibration draws air from the enclosure 400, and the external airflow flows into the tube 100 through the outer end of the tube 100 and then into the enclosure 400. Since the second horn opening 130 is entirely made of a fourth porous component, the entire second horn opening 130 has the function of improving airflow and porous sound absorption and noise reduction. It can effectively improve airflow throughout the entire process of airflow flowing into or out of the second horn opening 130, while continuously absorbing sound energy, further expanding and improving the acoustic performance and sound quality of the speaker.

[0081] Combination Figure 11 and Figure 12 The second horn opening 130 is configured as the fourth perforated component, and the side of the fourth perforated component near the outside of the housing 400 is configured as the second serrated structure 300.

[0082] In this embodiment, a plurality of second grooves are provided along the circumference of the fourth porous component on the side near the outer side of the housing 400. Each second groove is V-shaped to form a second serrated structure 300 on the side of the fourth porous component near the outer side of the housing 400. In other embodiments, by adjusting the shape of the second grooves, different structures can be formed on the side of the fourth porous component near the outer side of the housing 400, for example, the second grooves can be set as U-shaped, triangular or rectangular, etc.

[0083] By adopting the above technical solution, the second sawtooth structure 300 can divide the continuous jet shear layer formed when the airflow flows into or out of the second horn mouth 130 into multiple small, independent local shear layers, suppressing the formation of large-scale vortices and reducing vortex noise from the airflow jet source. At the same time, the second horn mouth 130, which is an integral fourth porous component, can fully absorb the noise generated during the airflow in or out process by utilizing its own porous sound absorption characteristics. While retaining the smooth airflow guidance, extended low-frequency response, and enhanced bass effect of the traditional second horn mouth 130, it further reduces the airflow noise at the tube body 100 outlet, making the speaker sound purer and more natural.

[0084] The third porous component 131 or the fourth porous component is configured as a second foam component, a second fiber component, a second granular component, or a second metal component.

[0085] In this embodiment, the second foam component is EVA foam, PU foam, PE foam, PP foam, NBR foam or EPDM foam. The material of the second foam component is lightweight and soft, has high porosity, stable sound absorption performance, and good buffering and vibration reduction characteristics. It is easy to fit and install and is not prone to structural resonance.

[0086] The second fiber component is made of polyester fiber, melamine sound-absorbing cotton, glass fiber cotton, or rock wool. The interconnected pores formed by the interlacing of the fibers in the second fiber component can efficiently dissipate sound energy, are resistant to high temperature and aging, and have excellent sound absorption and noise reduction effects in a wide frequency range.

[0087] The second part is made of porous ceramic particles, expanded perlite particles, or porous mineral wool particles. The second part has high structural strength and stable physical properties. It can absorb and dissipate airflow noise through the porous channels formed between the particles, making it suitable for long-term stable working scenarios.

[0088] The second metal component is made of foamed aluminum, foamed copper, porous stainless steel, or porous titanium alloy. The porous structure of the second metal component combines high structural strength with good heat dissipation, outstanding sound absorption, noise reduction, and impact resistance, and excellent durability and reliability, which can meet the needs of the speaker under high power and high dynamic conditions.

[0089] This application also provides a speaker, including a cabinet 400 and a bass reflex tube of any of the above embodiments, wherein the end of the tube body 100 of the bass reflex tube located inside the cabinet 400 is configured as an inner end.

[0090] The specific structure of the phase inverter has been described in detail in the above embodiments, and will not be repeated here.

[0091] The speaker provided in this application, by setting a bass reflex tube, has a first porous component 111 set on the outer side wall and / or inner side wall of the first horn opening 110. During the process of airflow into or out of the tube body 100, the porous structure of the first porous component 111 can improve the airflow and absorb the turbulence noise generated by the airflow. In conjunction with the receiving groove 120, it provides installation space for the first porous component 111, preventing the first porous component 111 from protruding outward and colliding with the speaker, circuit support or cabinet 400 to generate vibration noise. It can also reduce airflow noise from the inside without affecting the airflow guidance and low frequency extension effect of the tube body 100, thereby improving the purity of the speaker's sound.

[0092] The first horn opening 110 is configured as a second porous component, and a first serrated structure 200 is provided on the side of the second porous component away from the housing 400. The first serrated structure 200 can divide the continuous jet shear layer flowing into or out of the first horn opening 110 into multiple small and independent shear layers, suppressing the formation of large-scale eddies and weakening turbulent noise. At the same time, the porous sound absorption characteristics of the second porous component itself are used to fully absorb mid-to-high frequency noise, further enhancing the noise reduction effect while ensuring smooth airflow and optimizing bass sound quality and overall acoustic performance.

[0093] A third porous element 131 is provided on the outer side wall and / or inner side wall of the second horn port 130, which can improve the air flow during the process of airflow flowing in and out from the outer end of the tube body 100, while absorbing airflow noise, and further improving the listening comfort when the speaker is playing.

[0094] The second horn opening 130 is configured as a fourth porous component, and a second serrated structure 300 is provided on the side of the fourth porous component near the outer side of the cabinet 400. The second serrated structure 300 can divide the jet shear layer flowing into or out of the second horn opening 130, destroy the large vortex structure to reduce vortex noise. At the same time, the porous structure of the overall fourth porous component is used to continuously absorb airflow noise. While retaining the advantages of smooth airflow and extended low-frequency response of the second horn opening 130, the airflow noise at the outer end of the tube 100 is reduced, and the overall acoustic quality of the speaker is improved.

[0095] Combination Figure 13 and Figure 14 , Figure 13 The solid line in the figure represents the airflow noise test result of the first horn opening 110 without the receiving groove 120. Figure 13 The dashed line in the figure represents the airflow noise test result of the first horn 110 of the receiving slot 120; Figure 14 The solid line in the figure represents the airflow noise test result of the first horn opening 110 of the receiving slot 120. Figure 14 The dashed line in the figure represents the airflow noise test result of the first horn 110, which is simultaneously equipped with the receiving groove 120 and the first porous component 111.

[0096] Figure 13 and Figure 14 The horizontal axis in the diagram represents frequency, measured in Hz. Frequency is used to indicate the number of vibrations per second of a sound wave. The value increases from left to right, covering the entire frequency range from low to high frequencies. Figure 13 and Figure 14 The vertical axis represents the sound pressure level, abbreviated as SPL, and the unit is dB. The sound pressure level is used to characterize the intensity of sound. The higher the sound pressure level above 620Hz-20000Hz, the greater the airflow noise.

[0097] The test results show that setting the receiving groove 120 and the first porous component 111 can effectively reduce the airflow noise of the bass reflex tube, and at the same time prevent vibration noise caused by the bass reflex tube colliding with the subwoofer, circuit support or cabinet. Overall, it achieves excellent noise reduction and vibration reduction effect, and optimizes the acoustic and structural reliability of the bass reflex tube.

[0098] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A phase inverter, characterized in that, include: A tube (100) is provided, one end of which is used to pass through the cabinet (400) of the speaker and communicate with the outside of the cabinet (400). The other end of the tube (100) extends into the inside of the cabinet (400). The end of the tube (100) located inside the cabinet (400) is set as the inner end, and the inner end is set as the first horn mouth (110). The first horn opening (110) is provided with a first porous component (111) on its outer side wall and / or inner side wall, or the first horn opening (110) is configured as a second porous component.

2. The phase inverter according to claim 1, characterized in that, A first porous component (111) is provided on the outer side wall and / or inner side wall of the first flared opening (110); Along the circumference of the first flared opening (110), at least a portion of the outer sidewall and / or inner sidewall of the first flared opening (110) is provided with a receiving groove (120), and at least a portion of the receiving groove (120) is used to correspondingly receive the first porous component (111).

3. The phase inverter according to claim 2, characterized in that, The receiving groove (120) is disposed on the side away from the outside of the box (400) through the first flared opening (110).

4. The phase inverter according to claim 2, characterized in that, The thickness of the first porous component (111) is greater than or equal to the depth of the receiving groove (120).

5. The phase inverter according to claim 1, characterized in that, The first horn opening (110) is configured as a second multi-hole component; The side of the second porous component away from the outside of the housing (400) is configured with a first serrated structure (200).

6. The inverter tube according to any one of claims 1 to 5, characterized by The first porous component (111) or the second porous component is configured as a first foam component, a first fiber component, a first granular component, or a first metal component.

7. The phase inverter according to any one of claims 1-5, characterized in that, The end of the tube (100) near the outside of the box (400) is designated as the outer end, and the outer end is designated as the second flared mouth (130); A third porous element (131) is provided on the outer side wall and / or inner side wall of the second flared mouth (130), or the second flared mouth (130) is provided as a fourth porous element.

8. The phase inverter according to claim 7, characterized in that, The second horn opening (130) is configured as a fourth porous component, and the side of the fourth porous component near the outside of the housing (400) is configured as a second serrated structure (300).

9. The inverter tube of claim 7, wherein, The third porous component (131) or the fourth porous component is configured as a second foam component, a second fiber component, a second granular component, or a second metal component.

10. A sound box, characterized in that, Includes a housing (400) and a phase inverter tube according to any one of claims 1-9, wherein the end of the tube body (100) of the phase inverter tube located inside the housing (400) is configured as an inner end.

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