Inverter tube structure for reducing intermediate frequency peak interference

Abstract

The utility model provides an inverter tube structure for reducing intermediate frequency peak interference, which comprises a tube body with a long tube structure, the middle section of the tube body is provided with a convex cavity, the convex cavity is obliquely arranged along the front side wall and the rear side wall of a sound wave propagation direction, and sound waves are accumulated with original sound waves after being reflected and output by the convex cavity, so that low-frequency sound waves are enhanced, and high-frequency sound waves are eliminated. According to the utility model, the low-frequency sound pressure level can be enhanced, the probability that the inverter tube introduces a peak at an intermediate frequency is reduced, and the smoothness of sound waves is improved.

Description

Technical Field

[0001] This utility model relates to the field of phase inverter technology, specifically to a phase inverter structure for reducing intermediate frequency spike interference. Background Technology

[0002] Bass reflex ports are widely used in speaker designs because they utilize vibrations behind the speaker to amplify sound waves, enhance bass, and improve sound quality. However, traditional bass reflex ports not only amplify bass but also introduce peaks in the mid-range, affecting the overall frequency response of the speaker. To remove these mid-range peaks, other methods are needed to address them separately in the overall speaker design, increasing the complexity of the speaker design process. Utility Model Content

[0003] In view of this, the problem to be solved by this utility model is to provide a phase inverter structure that reduces mid-frequency spike interference, which can enhance the low-frequency sound pressure level while reducing the probability of the phase inverter introducing spikes in the mid-frequency range and improving the smoothness of the sound wave.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A phase inverter structure for reducing mid-frequency spike interference includes a tube body with a long tube structure. A protruding cavity is provided in the middle section of the tube body. The front and rear sidewalls of the protruding cavity are inclined along the direction of sound wave propagation. After the sound wave is reflected by the protruding cavity, it is superimposed with the original sound wave to enhance low-frequency sound waves and eliminate high-frequency sound waves.

[0006] Furthermore, the protruding cavity is filled with sponge or sound-absorbing sponge to reduce high-frequency noise.

[0007] Furthermore, the tube body has a rectangular cross-section along its length, and the protruding cavity is a frustum structure that is smaller at the top and larger at the bottom.

[0008] Furthermore, the cross-section of the tube along its length is rectangular, and the protruding cavity is a triangular prism knot, the length direction of which is perpendicular to the length direction of the tube.

[0009] The advantages and positive effects of this utility model are:

[0010] (1) By setting a protruding cavity in the middle section of the tube, the front and rear side walls of the protruding cavity are inclined along the direction of sound wave propagation. By adjusting the inclination angle and distance of the side walls, the sound pressure value of low frequency sound waves can be enhanced and the sound pressure value of mid frequency and high frequency sound waves can be reduced simultaneously.

[0011] (2) By placing a sponge or sound-absorbing sponge in the protruding cavity, the intermediate frequency and high frequency sound waves are absorbed or accumulated and canceled out, further reducing the probability of intermediate frequency peaks appearing in the tube and improving the smoothness of the frequency response of the phase inverter.

[0012] (3) By using soft materials to make the phase reversing tube, the soft materials have the property of absorbing mid-frequency sound waves. If no protrusion cavity is set, the phase reversing tube can also reduce the sound pressure value of mid-frequency and high-frequency sound waves; if a protrusion cavity is set, the phase reversing tube can also enhance the sound pressure value of low-frequency sound waves. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0014] Figure 1 This utility model provides a phase inverter structure for reducing intermediate frequency spike interference, with its protruding cavity being a frustum structure.

[0015] Figure 2 This is a cross-sectional view of a phase inverter structure for reducing intermediate frequency spike interference according to this utility model, wherein the protruding cavity is a frustum structure.

[0016] Figure 3 This utility model describes the overall structure of a phase inverter structure for reducing intermediate frequency spike interference, where the protruding cavity is a triangular prism junction.

[0017] Figure 4 This is a cross-sectional view of a phase inverter structure for reducing intermediate frequency spike interference according to this utility model, wherein the protruding cavity is a triangular prism junction.

[0018] Figure 5 This is a waveform diagram of the frequency-sound pressure level of the output sound wave when there is no protruding cavity in the phase inverter structure for reducing mid-frequency peak interference according to this utility model.

[0019] Figure 6 This utility model describes a phase inverter structure for reducing mid-frequency spike interference. When the structure has a protruding cavity, the output sound wave frequency-sound pressure level waveform is shown.

[0020] In the diagram: 1. Tube body; 2. Protruding cavity. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] This invention provides a phase inverter structure for reducing intermediate frequency spike interference, such as... Figure 1 and Figure 3 As shown, the tube includes a long tube structure with a protruding cavity in the middle section. The distance between the front and rear sidewalls in the direction of sound wave propagation is adjusted according to the frequency range of the sound wave to be eliminated, so that the reflected sound wave in the frequency range is superimposed with the original sound wave, thereby canceling the sound pressure value of the sound wave in the frequency range, removing peak noise, and improving the smoothness of the frequency response in the phase inverter tube.

[0025] like Figure 5 As shown, the bass reflex port in an audio system is typically used to enhance low-frequency sound waves. The sound wave output by the bass reflex port usually has a low-frequency peak and a mid-frequency peak. The low-frequency peak is 52Hz, and the mid-frequency peak is 900Hz. By adjusting the distance between the front and rear sidewalls of the convex cavity, the sound pressure level of the low-frequency sound wave can be increased simultaneously while the sound pressure level of the mid- and high-frequency sound waves is reduced.

[0026] The front and rear sidewalls of the protruding cavity are inclined along the direction of sound wave propagation. By adjusting the inclination angle of the sidewalls, the number of reflections and propagation distance of the sound wave at the front and rear sidewalls can be controlled. The inclined sidewalls also shorten the length of the protruding cavity along the length of the tube, so that it can be arranged on a phase-reversing tube of any structure. In one embodiment of this application, the protruding cavity can be arranged in the middle section of the tube, whether it is a long straight tube or a bent tube with several bends, to reduce the sound pressure value of the sound wave in the required frequency band.

[0027] The protruding cavity is lined with sponge or sound-absorbing sponge. After sound waves enter the cavity, some of them penetrate the sponge or sound-absorbing sponge. High-frequency and mid-frequency sound waves have stronger penetrating power than low-frequency sound waves and are more likely to enter the sponge or sound-absorbing sponge. When sound waves are inside the sponge, they are reflected multiple times, and the cumulative effect eliminates high-frequency sound waves. When sound waves enter the sound-absorbing sponge, the sponge has a higher absorption rate for mid-frequency and high-frequency sound waves than for low-frequency sound waves. High-frequency and mid-frequency sound waves are absorbed and converted into heat energy, which also eliminates mid-frequency and high-frequency sound waves.

[0028] One embodiment of this application is as follows: the bass reflex port is a long tube structure made of a soft material. The soft material is selected from materials that can absorb mid-frequency or high-frequency sound waves. Even without a raised cavity, it can remove peak noise and improve the smoothness of the frequency response within the bass reflex port. The soft material includes soft silicone or soft rubber.

[0029] The tube body, made of a soft material, has a raised cavity in its middle section. The front and rear sidewalls of the raised cavity are inclined along the direction of sound wave propagation. The raised cavity is filled with sponge or sound-absorbing sponge to reduce high-frequency noise. One embodiment of this application is as follows: the soft material is selected based on the low-frequency band and the mid-frequency peak band, and the raised cavity is set or sponge is placed in the raised cavity according to the filtering effect of the mid-frequency sound wave.

[0030] like Figure 1 and Figure 2 As shown, one embodiment of this application is as follows: the tube body is a straight tube with a rectangular cross-section along its length, and the protruding cavity is a frustum structure with a smaller top and a larger bottom, so that the sidewall of the protruding cavity is inclined, and the sound wave is output after multiple reflections in the protruding cavity.

[0031] like Figure 3 and Figure 4 As shown, one embodiment of this application is as follows: the tube body is a straight tube with a rectangular cross-section along its length direction, and the protruding cavity is a triangular prism structure with the length direction of the triangular prism structure perpendicular to the length direction of the tube body, so that the side wall of the protruding cavity is inclined along the direction of sound wave transmission, and the sound wave is output after multiple reflections in the protruding cavity.

[0032] like Figure 5 As shown, when there is no protruding cavity on the phase inverter and the peak frequency of the low-frequency sound wave is 52Hz, the difference between the highest low-frequency peak and the highest mid-frequency peak is 83-73=10. Figure 6 As shown, when the protruding cavity on the bass reflex port is a frustum or triangular prism structure, and the peak frequency of the output low-frequency sound wave is 50.7Hz, the difference between the highest low-frequency peak and the highest mid-frequency peak is 107-90=17 or 106-89=17. At the same or close peak frequencies, the difference in low-frequency sound pressure levels is significantly increased in the bass reflex port with the protruding cavity, improving the smoothness of the frequency response. Figure 5 and Figure 6 As can be seen from the waveform comparison shown, Figure 6 The sound pressure level at 900Hz was significantly reduced, achieving the technical effect of removing mid-frequency spikes.

[0033] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made within the scope of this utility model should still fall within the scope of this patent.

Claims

1. A phase inverter structure for reducing intermediate frequency spike interference, characterized in that, The tube includes a long tube structure, with a protruding cavity in the middle section. The front and rear sidewalls of the protruding cavity are inclined along the direction of sound wave propagation. After the sound wave is reflected by the protruding cavity, it is superimposed with the original sound wave to enhance low-frequency sound waves and eliminate high-frequency sound waves.

2. The inverter structure for reducing intermediate frequency spike interference according to claim 1, characterized in that, The protruding cavity is filled with sponge or sound-absorbing sponge to reduce high-frequency noise.

3. The inverter structure for reducing intermediate frequency spike interference according to claim 1, characterized in that, The tube has a rectangular cross-section along its length, and the protruding cavity is a frustum structure that is smaller at the top and larger at the bottom.

4. The inverter structure for reducing intermediate frequency spike interference according to claim 1, characterized in that, The tube body has a rectangular cross-section along its length, and the protruding cavity is a triangular prism knot, the length direction of which is perpendicular to the length direction of the tube body.

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