Playing and singing sound box with balanced alto

Abstract

The utility model relates to the technical field of sound boxes, in particular to a playing and singing sound box with balanced alto, which comprises a box body, the box body is a wooden box with the thickness of more than 18mm, high-density acoustic foam is paved on the inner wall of the box body, the front part of the box body is of a halfpace structure, the inclination angle of inclined planes on two sides of the halfpace structure is 30-60 degrees, and a high pitch unit is arranged at the upper part of the front surface of the halfpace structure. The high-pitch unit horn adopts a compression driver and a waveguide horn, a middle-pitch unit is arranged at the lower part of the front surface, the diameter of the middle-pitch unit is 12-15 inches, a low-pitch unit is arranged at the upper parts of the inclined surfaces at the two sides of the halfpace structure respectively, the diameter of the low-pitch unit is also 12-15 inches, and an air pipe is arranged below the low-pitch unit; according to the sound box, the large-size alto unit is adopted, the output capacity of human voice frequency bands is improved, the alto unit is installed on the central plane, the alto unit is far away from the sharp corner of the box body, edge diffraction interference is remarkably reduced, the intermediate frequency capacity is outstanding, the power of the power amplifier can be reduced, and energy consumption is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of speaker technology, specifically a mid-range balanced singing and playing speaker. Background Technology

[0002] Traditional speakers typically place the woofer at the front of the enclosure. This layout results in a larger overall speaker size and lower space utilization, making it appear bulky, especially in modern homes or application scenarios that emphasize simplicity and compactness.

[0003] Dedicated midrange loudspeakers used for reproducing the critical vocal frequency range (midrange) generally have a small effective radiation area. This results in limited sound pressure level output capability, making it difficult to clearly and powerfully reproduce midrange signals such as vocals. Furthermore, in traditional multi-way systems, improper physical positioning and crossover point settings between the midrange loudspeaker and adjacent woofers and tweeters can easily lead to acoustic interference. This interference not only reduces the clarity of the midrange frequency range but also interferes with the sound wave radiation of the woofers and tweeters, degrading the overall sound quality and preventing the addition of a midrange unit from fully realizing its potential, or even having the opposite effect.

[0004] Limited by the aforementioned structural layout, unit performance matching, and acoustic interference issues, traditional speaker systems often suffer from insufficient resolution, rough sound, and a lack of detail in sound reproduction, especially in the mid-frequency range such as vocals. The overall sound fidelity is low, making it difficult to meet the demands for high-fidelity sound quality.

[0005] Therefore, it is necessary to design a speaker with prominent mid-range frequencies. Utility Model Content

[0006] Based on this, this solution provides a midrange-balanced acoustic speaker for playing and singing.

[0007] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0008] A midrange balanced acoustic speaker enclosure includes a cabinet, a circuit board, and a speaker. The cabinet is a wooden box with a thickness of 18mm or more, and the inner walls of the cabinet are lined with high-density acoustic foam. The front of the cabinet has a trapezoidal structure, and the slopes on both sides of the trapezoidal structure have an inclination angle of 30 to 60°. The speaker includes a tweeter, a midrange driver, and a woofer. A tweeter is located on the upper part of the front of the trapezoidal structure, and the tweeter uses a compression driver and a waveguide horn. A midrange driver with a diameter of 12 to 15 inches is located on the lower part of the front. A woofer with a diameter of 12 to 15 inches is located on the upper part of the slopes on both sides of the trapezoidal structure. A duct is located below the woofer. A handle and an amplifier control panel are located at the rear of the top of the cabinet.

[0009] Optionally, in one embodiment of the present invention, the diameter of the bass unit is less than or equal to the diameter of the midrange unit.

[0010] Optionally, in one embodiment of the present invention, the circuit board is disposed on the inner side of the back panel of the enclosure, and a mounting bracket is provided between the back panel of the enclosure and the circuit board. The mounting bracket and the circuit board are connected and fixed by rubber isolation washers and plastic screws. A rubber shock-absorbing washer is provided between the mounting bracket and the back panel of the enclosure to isolate vibration transmission.

[0011] Optionally, in one embodiment of the present invention, a rectangular moisture-proof cavity is provided on the inner side of the back panel of the box for mounting the circuit board.

[0012] Optionally, in one embodiment of the present invention, both the midrange unit and the bass unit are driven by neodymium magnets.

[0013] Optionally, in one embodiment of the present invention, the circuit board uses a 4th-order LR filter as a crossover to reduce intermodulation distortion and make the sound cleaner.

[0014] Optionally, in one embodiment of the present invention, the midrange unit has a diameter of 15 inches and the bass unit has a diameter of 12 inches.

[0015] Optionally, in one embodiment of the present invention, the tweeter unit is further provided with an independent high-pass filter to prevent low-frequency or transient large signals from burning out the tweeter unit.

[0016] Optionally, in one embodiment of the present invention, a midrange chamber is constructed behind the midrange unit, and a bass chamber is constructed behind the bass unit.

[0017] Compared with the prior art, the mid-range balanced vocal speaker provided by this utility model has the following characteristics:

[0018] By employing a high-sensitivity, large-diameter neodymium magnet midrange unit with a rear-mounted independent chamber, combined with a finely tuned crossover point, the clarity, power, and purity of vocals are maximized. The unique stepped front baffle design effectively suppresses mid-to-high frequency diffraction, improving sound image positioning and overall clarity. The side-mounted woofer, combined with a ductwork, enhances low-frequency performance. Meanwhile, the cabinet uses thickened plates, a grid-shaped support structure, rubber pads for the units, flexible circuit board mounting, and anti-slip pads on the bottom to ensure structural rigidity. The moisture-proof cavity on the back panel improves the reliability of the circuitry in humid environments, balancing professional sound quality and structural strength. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional schematic diagram of the speaker in Embodiment 1 of this utility model;

[0021] Figure 2 This is a front view of the speaker in Embodiment 1 of this utility model;

[0022] Figure 3 This is a schematic diagram of the internal structure of the box in Embodiment 1 of this utility model;

[0023] Attached reference numerals: 1. Cabinet; 2. Tweeter; 3. Midrange unit; 301. Midrange chamber; 4. Woofer; 401. Woofer chamber; 5. Air duct; 6. Handle; 7. Control panel; 8. Steel mesh; 9. Grid-shaped support structure; 10. Moisture-proof chamber. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other. The technical solutions of the present invention will be further described below with reference to the accompanying drawings of the embodiments. The present invention is not limited to the specific embodiments described below.

[0025] It should be understood that the same or similar reference numerals in the accompanying drawings of the embodiments correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "front," "rear," "left," "right," "top," and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms describing positional relationships in the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0026] Example 1

[0027] Traditional speaker systems often suffer from insufficient resolution, a rough sound, and a lack of detail in sound reproduction, especially in the mid-frequency range, such as vocals. The overall sound fidelity is low, making it difficult to meet the demand for high-fidelity sound. Therefore, a speaker designed to emphasize the vocal frequency range was developed, as follows:

[0028] like Figure 1-2 As shown, a mid-range balanced acoustic speaker enclosure includes a cabinet 1, a circuit board, and a speaker. The cabinet 1 is a wooden box with a thickness of 18mm or more. The material of the cabinet 1 can be medium-density fiberboard (MDF) with a thickness of 25mm or more, or multi-layer birch plywood with a thickness of 19mm or more. The inner walls of the cabinet 1 are lined with high-density acoustic foam. The front of the cabinet 1 is a stepped structure with inward-curving sides. In this embodiment, a steel mesh 8 is installed on the outside of the stepped structure. The slope angle of the two sides of the stepped structure is 30 to 60°. The speaker includes a tweeter unit. 2. Midrange unit 3 and woofer 4: A tweeter 2 is set on the upper front of the trapezoidal structure. The tweeter 2 uses a compression driver and waveguide horn. A midrange unit 3 is set on the lower front. The midrange unit 3 has a diameter of 12 to 15 inches. A woofer 4 is set on the upper slope of each side of the trapezoidal structure. The woofer 4 has a diameter of 12-15 inches. A duct 5 is set below the woofer 4. The duct 5 is a plastic round duct. A handle 6 and an amplifier control panel 7 are located at the rear top of the cabinet 1.

[0029] By using a larger, more sensitive midrange unit 3, the sound pressure level of the midrange unit 3 in the vocal frequency range can be matched with the sound pressure level of the woofer 4 at the lowest effective frequency.

[0030] The design of the two sloping sides at the front of the enclosure 1 reduces mid-to-high frequency diffraction interference and improves clarity and positioning.

[0031] The diameter of the woofer 4 is less than or equal to the diameter of the midrange unit 3.

[0032] The circuit board is located inside the back panel of the cabinet 1. A mounting bracket is provided between the back panel of the cabinet 1 and the circuit board. The mounting bracket and the circuit board are connected and fixed by rubber isolation washers and plastic screws. Rubber damping washers are provided between the mounting bracket and the back panel of the cabinet 1 to isolate vibration transmission. Specifically, the back panel of the cabinet 1 has the best rigidity, which is relatively less affected by the direct vibration impact of the front bass unit 4 and midrange unit 3. The magnetic field strength is weakest at the back panel, and the installation space is relatively spacious. During disassembly and installation, the circuit board can be removed by removing the back panel. Inside the cabinet 1, there is also a grid-shaped support structure 9 to improve the rigidity of the speaker panel and suppress resonance. The shape of the horizontal support plate of the grid-shaped support structure 9 is similar to the shape and structure inside the cabinet 1, so that the support plate can contact the side of the cabinet 1 to provide support. The vertical support plate also adopts a square structure, so that the support plate can contact the sides, top and bottom of the cabinet 1.

[0033] The back panel of the housing 1 has a rectangular moisture-proof cavity 10 for the installation of circuit boards. The moisture-proof cavity 10 is also a detachable structure that covers the circuit board installation position to prevent moisture from the circuit board.

[0034] For the installation of midrange unit 3, use rubber washers to separate midrange unit 3 from cabinet 1, and fix it with screws with moderate torque. The installation of woofer 4 adopts the same installation method as midrange unit 3 to reduce the direct transmission of vibration to cabinet 1.

[0035] Both the midrange unit 3 and the woofer 4 use neodymium magnet drivers. Neodymium magnets have strong magnetic force, small size, light weight, and high efficiency. The sensitivity of the midrange unit 3 is above 100dB, while the sensitivity of the woofer 4 is ≥96dB. The sensitivity of the tweeter 2 is ≥105dB.

[0036] The circuit board uses a 4th-order LR filter as a crossover to reduce intermodulation distortion and make the sound cleaner.

[0037] In this design, the midrange unit 3 has a diameter of 15 inches, and the woofer 4 has a diameter of 12 inches.

[0038] Tweeter 2 is also equipped with an independent high-pass filter to prevent low-frequency or transient large signals from burning out tweeter 2.

[0039] In subsequent tuning, the speaker's crossover points were specifically set as follows: the crossover point for the bass and midrange was 250Hz-400Hz to reduce the impact of distortion and phase issues near the crossover point on vocals; the crossover point for the midrange and treble was 1.8kHz-2.5kHz to avoid the crossover point falling in the sibilance range, which could lead to changes in timbre or distortion.

[0040] A midrange chamber 301 is constructed behind the midrange unit 3, which is completely physically isolated from the two bass chambers 401 on both sides, improving the purity of the midrange. A bass chamber 401 is constructed behind the bass unit 4. Both the midrange chamber 301 and the bass chamber 401 are equipped with aluminum heat dissipation fins for internal heat dissipation.

[0041] The bottom of the speaker is also equipped with rubber anti-slip and shock-absorbing pads.

[0042] The speaker in this design uses a large-size, high-sensitivity midrange unit 3, which covers the fundamental frequency and overtones of human voice, so singers do not need to strain to shout. It also has an independent midrange chamber 301, which reduces midrange distortion and improves purity.

[0043] The inward-curving trapezoidal structure design at the front of the cabinet reduces mid-to-high frequency diffraction and improves the clarity of sibilance in human voices.

[0044] The duct features a 5-phase inverted design, reducing the power consumption of the subwoofer amplifier.

[0045] The tweeter unit 2 uses a compression driver and waveguide horn to ensure high-frequency penetration.

[0046] The midrange and bass units 4 are isolated by rubber gaskets, the circuit board is equipped with a vibration-isolated mounting bracket, and the bottom of the cabinet 1 is equipped with an anti-slip and shock-absorbing pad to reduce the transmission of vibration to the cabinet 1.

[0047] Example 2

[0048] In this embodiment, the structure of the speaker is basically the same as that of Embodiment 1. The difference is that multiple triangular reinforcing ribs are provided between the inclined surface and the top and bottom surfaces of the cabinet 1 to improve the rigidity and vibration resistance of the inclined surface.

[0049] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A mid-range balanced acoustic speaker for playing and singing, characterized in that, The enclosure includes a cabinet, a circuit board, and a speaker. The cabinet is a wooden box with a thickness of 18mm or more. The inner walls of the cabinet are lined with high-density acoustic foam. The front of the cabinet has a trapezoidal structure with slopes on both sides of the trapezoidal structure at an angle of 30 to 60°. The speaker includes a tweeter, a midrange driver, and a woofer. A tweeter with a compression driver and a waveguide horn is located on the upper part of the front of the trapezoidal structure. A midrange driver with a diameter of 12 to 15 inches is located on the lower part of the front. A woofer with a diameter of 12 to 15 inches is located on the upper part of the slopes on both sides of the trapezoidal structure. A duct is located below the woofer. A handle and an amplifier control panel are located at the rear of the top of the cabinet.

2. The mid-range balanced vocal amplifier according to claim 1, characterized in that: The diameter of the bass unit is less than or equal to the diameter of the midrange unit.

3. A mid-range balanced vocal amplifier according to claim 1, characterized in that: The circuit board is located inside the back panel of the enclosure. A mounting bracket is provided between the back panel of the enclosure and the circuit board. The mounting bracket and the circuit board are connected and fixed by rubber isolation washers and plastic screws. A rubber shock-absorbing washer is provided between the mounting bracket and the back panel of the enclosure to isolate vibration transmission.

4. A mid-range balanced vocal amplifier according to claim 1, characterized in that: The back panel of the enclosure has a rectangular moisture-proof cavity on the inside, which is used for the installation of circuit boards.

5. A mid-range balanced vocal amplifier according to claim 1, characterized in that: Both the midrange and bass units are driven by neodymium magnets.

6. A mid-range balanced vocal amplifier according to claim 1, characterized in that: The circuit board uses a 4th-order LR filter as a crossover to reduce intermodulation distortion and make the sound cleaner.

7. A mid-range balanced vocal amplifier according to claim 1, characterized in that: The midrange driver has a diameter of 15 inches, and the woofer has a diameter of 12 inches.

8. A mid-range balanced vocal amplifier according to claim 1, characterized in that: The tweeter unit is also equipped with an independent high-pass filter to prevent low-frequency or transient large signals from burning out the tweeter unit.

9. A mid-range balanced vocal amplifier according to claim 1, characterized in that: A midrange chamber is constructed behind the midrange unit, and a bass chamber is constructed behind the bass unit.

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