Semi-open sound box comprising damping plate

Abstract

The utility model relates to a household high-fidelity sound box, in particular to a semi-open sound box comprising a damping plate. The sound box comprises a box body, a low-frequency loudspeaker mounting port, a plurality of open ports, a plurality of damping plates, damping hole groups, sound box binding posts and sound box foot pins. The front part of the box body is provided with a low-frequency loudspeaker mounting port, the rear part is provided with a sound box binding post, and the bottom is provided with sound box foot nails; the shape of the low-frequency loudspeaker mounting port is rectangular or circular; a plurality of openings are formed in the upper part, the lower part, the front part, the rear part and the two sides of the box body; damping plates are arranged in the plurality of openings; the plurality of openings are respectively rectangular or circular; the shape of the damping plate is consistent with that of the opening corresponding to the damping plate; a damping hole group is formed in the damping plate; the damping hole group consists of a plurality of rectangular holes with different lengths; the damping hole groups are uniformly distributed in the damping plate; and sound-absorbing felts with corresponding lengths are arranged in the rectangular holes with different lengths.

Description

Technical Field

[0001] The utility model relates to a household high-fidelity speaker, in particular to a household high-fidelity speaker suitable for a pneumatic low-frequency speaker, which has the characteristics of flat low-frequency response in the frequency band below 200 Hz, small box resonance, strong bass, low dive, clean sound quality and no "box sound". Background Art

[0002] In audio technology, the Q value of a low-frequency speaker (also called the quality factor of a low-frequency speaker) is an important indicator to measure the control of a low-frequency speaker over low frequencies. The Q value specifically represents the damping coefficient of the low-frequency speaker, that is, the relative amplitude of the low-frequency speaker cone at the resonant frequency. A high-Q low-frequency speaker has a larger cone amplitude at the resonant frequency than a low-Q low-frequency speaker, so the size of the Q value of the low-frequency speaker directly affects the performance of the bass. High-Q low-frequency speakers (such as pneumatic low-frequency speakers, patent number ZL2023211355011) have the advantage of good low-frequency power because of the large cone amplitude at the resonant frequency. Compared with low-Q low-frequency speakers, they can provide more abundant bass volume. However, the disadvantage of high-Q low-frequency speakers (especially pneumatic low-frequency speakers) is that they can induce strong cabinet resonance. Both large-volume closed speakers and bass-reflex speakers (the two main popular speakers on the market) have cabinet resonance problems. And the resonance on the bass reflex tube speaker is more serious (especially the cabinet whose two side panels, front and back panels, and upper and lower panels are parallel planes). Therefore, it is difficult to flatten the frequency response curve of the low-frequency part of the speaker (the frequency band below 200Hz) in practical applications. That is, peaks or valleys with amplitudes exceeding + / -4dB will be generated in the low-frequency part of the frequency response curve (i.e. 200Hz to system Fs frequency band), resulting in low-frequency distortion and obvious "box sound" and lack of layering in the listening experience, which in turn limits the application of pneumatic low-frequency speakers in the high-fidelity field. In view of the above problems, the utility model proposes a semi-open sound box including a damping plate. The front and back parts, the upper and lower parts and the two sides of the sound box are provided with a plurality of open openings, and the damping plates are embedded in the open openings. The damping plates can greatly reduce the resonance of the box body. At the same time, the damping plates also have a certain effect on reducing the system Fs (the system Fs refers to the Fs of the sound box and the low-frequency speaker as a whole). The use of the patented sound box with a pneumatic low-frequency speaker can eliminate the large fluctuations in the frequency response curve caused by the resonance of the box body. The fluctuation of the frequency response curve in the frequency band from 200Hz to the system Fs is less than + / -2dB, so that the sound box can produce high-power, low-dive, clean and high-quality bass without "box sound". Summary of the invention

[0003] To overcome the problem of cabinet resonance caused by the pneumatic low-frequency loudspeaker mentioned in the background art, the present utility model provides a practical and feasible damping plate device with obvious effects. The semi-open speaker using this damping plate can greatly reduce cabinet resonance. The speaker made using the technology of this patent can use a pneumatic low-frequency loudspeaker, and its frequency response flatness in the low-frequency band is better than that of a bass-reflex speaker (with the same volume) and a closed speaker (with a large volume). At the same time, since the damping plate also helps to reduce the system Fs (the system Fs refers to the overall Fs composed of the low-frequency loudspeaker and the cabinet), the speaker of this patent can provide high-quality bass with strong force, deep bass, clean without "cabinet color" and distinct levels. Using the American LMS acoustic test system, the frequency response curves of the semi-open speaker including the damping plate described in this patent, a large-volume closed speaker, and a bass-reflex speaker with the same volume are respectively tested. The experimental results show that under the condition of using the same 10-inch pneumatic low-frequency loudspeaker, the flatness of the frequency response curve of the closed speaker (with a volume of about 180 liters) in the frequency band of 200 Hz to 45 Hz (the system Fs frequency point) is greater than + / - 4 dB (there is a -4 dB valley at 120 Hz and a +5.5 dB peak at 49 Hz), the flatness of the frequency response curve of the bass-reflex speaker (with a volume of about 120 liters) in the frequency band of 200 Hz to 45 Hz (the system Fs frequency point) is greater than + / - 7 dB (there is a +7.7 dB peak at 83.5 Hz and a -8.4 dB valley at 66 Hz), and the flatness of the frequency response curve of the speaker of this patent (with a volume of about 120 liters) in the frequency band of 200 Hz to 35 Hz (the system Fs frequency point) is less than + / - 2 dB and there are no obvious peaks or valleys. Under the condition of using the same 8-inch pneumatic low-frequency loudspeaker, the flatness of the frequency response curve of the closed speaker (with a volume of about 140 liters) in the frequency band of 200 Hz to 50 Hz (the system Fs frequency point) is greater than + / - 4 dB (there is a -4.2 dB valley at 155 Hz and a +4.3 dB peak at 55 Hz), the flatness of the frequency response curve of the bass-reflex speaker (with a volume of about 104 liters) in the frequency band of 200 Hz to 50 Hz (the system Fs frequency point) is greater than + / - 5.5 dB (there is a +6 dB peak at 90 Hz and a -5.5 dB valley at 70 Hz), and the flatness of the frequency response curve of the speaker of this patent (with a volume of about 104 liters) in the frequency band of 200 Hz to 40 Hz (the system Fs frequency point) is less than + / - 2 dB and there are no obvious peaks or valleys. From the above data, it can be seen that the frequency response flatness of the speaker of this patent in the frequency band of 200 Hz to the system Fs is much better than that of the bass-reflex speaker with the same volume (and is also significantly better than that of the large-volume closed speaker). When comparing the sound tests, it can be clearly felt that the low-frequency sound quality of the bass-reflex speaker lacks a sense of hierarchy and has serious "cabinet color", and the large-volume closed speaker also has "cabinet color". The bass sound quality of the speaker of this patent is clean without "cabinet color", distinct in levels, powerful, and the low-frequency dive is also better than that of the bass-reflex speaker with the same volume and the large-volume closed speaker.In summary, the semi-open speaker with a damping plate described in this patent can effectively suppress the resonance of the speaker box when using a pneumatic low-frequency speaker, significantly improve the flatness of the frequency response in the range of 200 Hz to the system Fs frequency band, and can produce high-quality bass with strong power, deep bass extension, and no "box coloration".

[0004] The specific technical solution of the present utility model is as follows: It includes a speaker box, several open ports, a low-frequency speaker mounting port, several damping plates, a damping hole group, speaker terminals, and speaker feet.

[0005] The semi-open speaker with a damping plate is characterized in that a low-frequency speaker mounting port is provided at the front of the speaker box, speaker terminals are provided at the rear, and speaker feet are provided at the bottom.

[0006] The semi-open speaker with a damping plate is characterized in that the shape of the low-frequency speaker mounting port is rectangular or circular.

[0007] The semi-open speaker with a damping plate is characterized in that several open ports are provided at the front, rear, upper, lower, and both sides of the speaker box.

[0008] The semi-open speaker with a damping plate is characterized in that the shapes of the several open ports are respectively rectangular or circular.

[0009] The semi-open speaker with a damping plate is characterized in that damping plates are provided in the several open ports; the shape of the damping plate is the same as that of the corresponding open port.

[0010] The semi-open speaker with a damping plate is characterized in that a damping hole group is provided on the damping plate; the damping hole group is composed of several rectangular holes with different lengths; the damping hole group is evenly distributed on the damping plate; sound-absorbing felts with corresponding lengths are provided in the rectangular holes with different lengths to damp the sound, and because the resonance frequency of the rectangular holes and the speaker cavity is much lower than the working frequency band, sound short-circuit will not occur. Description of the Drawings

[0011] As shown in the figure: 1 is the speaker box, 2 is the low-frequency speaker mounting port, 3 is the open port, 4 is the damping plate, 5 is the damping hole group, 6 is the speaker terminal, and 7 is the speaker foot.

[0012] Figure 1 is a schematic diagram of the overall structure of Embodiment 1 of the present utility model (view from the top down at the front left), including a low-frequency speaker mounting opening on the front of the box body, several openings at the front, rear, upper, lower parts and both sides of the box body, and several damping plates installed in the openings. Due to the occlusion of the box body, the damping plates on the right side, the rear part, the bottom part, and the wiring terminals at the rear are all shown in a "perspective" manner. Among them, the shapes of several openings are respectively rectangular or circular, and the shapes of the corresponding damping plates are also respectively rectangular or circular. The damping hole groups are evenly distributed on the damping plates. The damping hole groups are composed of several rectangular holes with different lengths. The low-frequency speaker mounting opening is circular and can install a pneumatic low-frequency speaker with a circular panel.

[0013] Figure 2 is Figure 1 an exploded view (view from the top down at the front left).

[0014] Figure 3 is a rear view of Embodiment 1 (view from the bottom up at the rear left). In this figure, the openings (and damping plates) at the bottom of the box body, the speaker wiring terminals at the rear of the box body, and the speaker feet at the four corners of the bottom of the box body can be seen.

[0015] Figure 4 is a schematic diagram of the overall structure of Embodiment 2 of the present utility model (view from the top down at the front left), where the occluded part is shown in a "perspective" manner. In a specific implementation, the low-frequency speaker mounting opening is rectangular and can install a pneumatic low-frequency speaker with a rectangular panel.

[0016] Figure 5 is a rear view of Embodiment 2 (view from the bottom up at the rear left). In this figure, the openings (and damping plates) at the rear and bottom of the box body, the speaker wiring terminals at the rear of the box body, and the speaker feet at the four corners of the bottom of the box body can be seen. Detailed implementation manners

[0017] Embodiment 1: Referring to Figures 1-3 in the specification drawings, it is a schematic diagram of the structure of the present utility model. It includes a box body 1, a low-frequency speaker mounting opening 2, an opening 3, a damping plate 4, a damping hole group 5, a speaker wiring terminal 6, and a speaker foot 7. The characteristics are as follows: The front part of the box body is provided with a low-frequency speaker mounting opening, the rear part is provided with a speaker wiring terminal, and the bottom is provided with speaker feet; Several openings are provided at the front, both sides and the rear of the box body; The shape of the low-frequency speaker mounting opening is circular and is suitable for installing a pneumatic low-frequency speaker with a circular panel; The shapes of several openings are respectively rectangular or circular; Rectangular or circular damping plates corresponding to their shapes are provided in several openings; The damping plate is provided with a damping hole group; The damping hole group is composed of several rectangular holes with different lengths; The damping hole group is evenly distributed on the damping plate; Sound-absorbing felts with corresponding lengths are provided in the rectangular holes with different lengths of the damping hole group.

[0018] Embodiment 2: Comparing the specification drawingsFigure 4 , compared with Embodiment 1, the differences between this Embodiment 2 and Embodiment 1 are as follows: the volume of the applicable box body in Embodiment 2 is larger than that in Embodiment 1; there are 2 rectangular openings on each of the two sides and the rear side of the box body; there are 2 circular openings at the lower front part of the box body; a rectangular low-frequency speaker mounting opening is provided at the front part of the box body, which is suitable for mounting a pneumatic low-frequency speaker with a rectangular panel.

Claims

1. A semi-open sound box including a damping plate, comprising a box body (1), a low-frequency speaker mounting opening (2), an open opening (3), a damping plate (4), a damping hole group (5), a sound box terminal (6), and a sound box foot nail (7), characterized in that: The front of the box (1) is provided with a low-frequency speaker installation opening (2), the rear is provided with speaker terminals (6), and the bottom is provided with speaker feet (7); the box (1) is provided with a plurality of openings (3); a damping plate (4) is provided in each of the plurality of openings (3); and a damping hole group (5) is provided on the damping plate (4).

2. A semi-open sound box comprising a damping plate as claimed in claim 1, characterized in that The shape of the low frequency speaker installation opening is rectangular or circular.

3. A semi-open sound box comprising a damping plate as claimed in claim 1, characterized in that The box body is provided with a plurality of openings at the front, rear, upper, lower and both sides.

4. A semi-open sound box comprising a damping plate as claimed in claim 3, characterized in that The shapes of the plurality of openings are respectively rectangular or circular.

5. A semi-open sound box comprising a damping plate as claimed in claim 3, characterized in that A damping plate is provided in each of the plurality of openings; the damping plate has the same shape as the corresponding opening.

6. A semi-open sound box comprising a damping plate as claimed in claim 5, characterized in that The damping plate is provided with a damping hole group; the damping hole group is composed of a plurality of rectangular holes of different lengths; the damping hole group is evenly distributed on the damping plate; and the rectangular holes of different lengths are each provided with sound-absorbing felt of corresponding length.

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