Acoustic processing device

Abstract

The invention provides an acoustic processing device which comprises a decorative picture layer, an acoustic board and a first shell, the decorative picture layer and the acoustic board are arranged on the first side of the first shell, the acoustic board is arranged between the decorative picture layer and the first shell, and the first shell and the acoustic board form a cavity; a first sound absorption layer, a second sound absorption layer and a loudspeaker are arranged in the cavity, the first sound absorption layer is arranged around the loudspeaker, and the second sound absorption layer is arranged on the second side of the first sound absorption layer; the loudspeaker is provided with a low-frequency loudspeaker array, an intermediate-frequency loudspeaker and a high-frequency loudspeaker, the intermediate-frequency loudspeaker and the high-frequency loudspeaker are arranged facing the decorative picture layer, and the low-frequency loudspeaker array is arranged facing the side wall of the first shell along vibrating diaphragms of the low-frequency loudspeakers; and a plurality of sound-absorbing through holes are formed in the sound-absorbing plate. The device realizes sound absorption and sound amplification, and ensures that the volume is reduced and the decorative picture layer does not vibrate.

Description

Technical Field

[0001] The present invention relates to the technical field of acoustic processing devices, and in particular to a mural - type acoustic processing device. Background Art

[0002] Existing sound - amplifying canvas products with audio - playing functions have gradually attracted attention. Such products aim to integrate speakers behind the canvas and transmit sound through the canvas to achieve the combination of art display and audio output. However, there are currently two major technical bottlenecks in this field that need to be solved.

[0003] First, the problem of canvas vibration during sound amplification cannot be completely solved. Sound is generated and propagated by air vibration. When the speaker is hidden behind the canvas, the sound passing through the canvas will inevitably cause the canvas to vibrate. Existing technologies face insurmountable technical bottlenecks. To reduce canvas vibration, only by sacrificing the sound quality significantly can the low - frequency part of the audio be cut off, which seriously affects the integrity and sound quality of audio playback. Second, it is impossible to combine the functions of sound absorption and sound amplification at the same time. Currently, sound - absorbing paintings and sound - amplifying paintings are relatively common on the market, but products that combine both sound - absorbing and sound - amplifying functions are lacking. This is mainly because the relevant technical difficulties have not been overcome. If the sound - amplifying and sound - absorbing technologies are directly combined according to the existing technologies, there are two implementation methods, but both have obvious defects. One is that the sound - amplifying device is in front of the sound - absorbing device. At this time, although the sound - absorbing device does not affect the sound quality of the sound - amplifying device, it will block the sound propagation path, resulting in poor sound - absorbing effect and a large overall device volume. The other is that the sound - amplifying device is behind the sound - absorbing device. The amplified sound will be blocked or absorbed by the sound - absorbing device, which will significantly affect the sound quality. At the same time, the device volume is not only very large, but also the sound quality is difficult to guarantee. Summary of the Invention

[0004] The first object of the present invention is to provide an acoustic processing device that reduces volume, reduces canvas vibration, and ensures the quality of the output sound.

[0005] To achieve the first object of the present invention, an acoustic processing device provided by the present invention includes a decorative painting layer, a sound - absorbing board, and a first housing. The decorative painting layer and the sound - absorbing board are arranged on the first side of the first housing. The sound - absorbing board is arranged between the decorative painting layer and the first housing, and the first housing and the sound - absorbing board form a cavity. Inside the cavity, there are a first sound - absorbing layer, a second sound - absorbing layer, and a speaker. The first sound - absorbing layer is arranged around the speaker, and the second sound - absorbing layer is arranged on the second side of the first sound - absorbing layer. The speaker is provided with a low - frequency speaker array, a mid - frequency speaker, and a high - frequency speaker. The mid - frequency speaker and the high - frequency speaker face the decorative painting layer, and the diaphragms of the respective low - frequency speakers in the low - frequency speaker array face the side wall of the first housing. The sound - absorbing board is provided with a plurality of sound - absorbing perforations.

[0006] As can be seen from the above solution, since the sound-absorbing panel and the first housing form a cavity, and a first sound-absorbing layer and a second sound-absorbing layer are provided inside the cavity, when the ambient sound in the room passes through the sound-absorbing panel and reaches the cavity, according to the Helmholtz principle, when the sound enters from the sound-absorbing panel, it causes reciprocating motion of the air, and the sound energy is converted into heat energy and consumed through friction. The speaker is arranged in the cavity. Since the speaker requires a certain rear cavity to isolate the front and rear sound waves, by arranging the speaker in the cavity and sharing a cavity with the sound-absorbing structure, the volume of the acoustic processing device can be reduced. In addition, since the mid-frequency speaker and the high-frequency speaker are arranged facing the decorative painting layer, and the diaphragms of the respective low-frequency speakers in the low-frequency speaker array are arranged facing the side wall of the first housing, due to the long wavelength and large vibration amplitude of the low-frequency sound, while ensuring that the decorative painting layer does not vibrate, the low-frequency quality is ensured without loss.

[0007] In a further solution, the first sound-absorbing layer is provided with a first sound-absorbing structure and a second sound-absorbing structure, and the density of the first sound-absorbing structure is less than the density of the second sound-absorbing structure; the diaphragms of the respective low-frequency speakers in the low-frequency speaker array are arranged facing the first sound-absorbing structure, and the second sound-absorbing structure is arranged on one side of the first sound-absorbing structure and the low-frequency speaker array.

[0008] Thus, since the density of the first sound-absorbing structure is less than the density of the second sound-absorbing structure, the density of the first sound-absorbing structure is the lowest. Since the low-density sound-absorbing structure does not absorb low-frequency sounds and the low-density sound-absorbing structure absorbs mid-frequency and high-frequency sounds, when the low-frequency speaker array works, the sound passes through the first sound-absorbing structure and diffuses outwards. The high-frequency noise generated by the low-frequency speaker array will be absorbed by the first sound-absorbing structure, making the low-frequency sound purer.

[0009] In a further solution, the low-frequency speaker array includes a first low-frequency speaker and a second low-frequency speaker; the first low-frequency speaker and the second low-frequency speaker are arranged back to back, and the rear cavity of the first low-frequency speaker is communicated with the rear cavity of the second low-frequency speaker; the first low-frequency speaker and the second low-frequency speaker are arranged facing the first sound-absorbing structure.

[0010] Thus, since the first low-frequency speaker and the second low-frequency speaker are arranged back to back and the rear cavity of the first low-frequency speaker is communicated with the rear cavity of the second low-frequency speaker, the first low-frequency speaker and the second low-frequency speaker share a rear cavity, thereby reducing the volume of the acoustic processing device. In addition, the first low-frequency speaker and the second low-frequency speaker are arranged back to back, and the array layout can increase the directivity of the low frequency, so that the low-frequency sound is emitted from the side of the acoustic processing device.

[0011] In a further solution, the first low-frequency speaker and the second low-frequency speaker are runway speakers; the width direction of the runway speaker is parallel to the arrangement direction of the decorative painting layer, the sound-absorbing panel and the first housing.

[0012] Thus, since the first low-frequency speaker and the second low-frequency speaker are runway speakers, the volume of the acoustic processor is reduced.

[0013] In a further embodiment, the density of the second sound-absorbing layer is greater than the density of the first sound-absorbing structure and greater than the density of the second sound-absorbing structure.

[0014] Thus, the second sound-absorbing layer is made of polyester fiber with the highest density to absorb the sound in the mid-low frequency environment. The first sound-absorbing structure is made of low-density polyester fiber to absorb high-frequency sound. The second sound-absorbing structure is made of medium-density polyester fiber to absorb broadband sound. The ambient sound in the room passes through the perforated plate, then through the first sound-absorbing layer and the second sound-absorbing layer, reflects in the cavity, and is repeatedly absorbed, thereby reducing the reverberant ambient sound in the room.

[0015] In a further embodiment, the sound-absorbing panel is provided with a first perforation and a second perforation, and the mid-frequency speaker passes through the first perforation and the high-frequency speaker passes through the second perforation.

[0016] Thus, by providing the first perforation and the second perforation, the sound of the mid-frequency speaker and the high-frequency speaker is not absorbed.

[0017] In a further embodiment, a back plate is provided on the second side of the first housing, and a hook is provided on the second side of the back plate.

[0018] Thus, the hook is made of plastic material to prevent the acoustic treatment device from making slight impacts with the wall during vibration and generating noise, and also to prevent resonance with the wall and generating noise.

[0019] In a further embodiment, the first housing includes a bottom plate, and a plurality of side walls surround the bottom plate, and openings are provided on the side wall facing the low-frequency speaker array.

[0020] Thus, openings are provided on the side wall facing the low-frequency speaker array, so that the low-frequency sound can be smoothly diffused to the outside.

[0021] In a further embodiment, a light-shielding cloth is provided between the sound-absorbing panel and the decorative painting layer.

[0022] Thus, by providing the light-shielding cloth, the beauty of the decorative painting layer is not affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of an embodiment of the acoustic treatment device of the present invention.

[0024] Figure 2 is an exploded structural diagram of an embodiment of the acoustic treatment device of the present invention.

[0025] Figure 3It is a structural diagram of a sound-absorbing panel, a mid-frequency speaker, and a low-frequency speaker in an embodiment of the acoustic processing device of the present invention.

[0026] Figure 4 It is a structural diagram of the interior of the cavity in an embodiment of the acoustic processing device of the present invention.

[0027] Figure 5 It is an exploded view of the structure of the first sound-absorbing layer, the speaker, the second sound-absorbing layer, and the first housing in an embodiment of the acoustic processing device of the present invention.

[0028] Figure 6 It is a structural diagram of the low-frequency speaker array in an embodiment of the acoustic processing device of the present invention.

[0029] Figure 7 It is a structural diagram from another perspective in an embodiment of the acoustic processing device of the present invention.

[0030] The present invention will be further described below in conjunction with the drawings and embodiments. Specific Embodiments

[0031] The acoustic processing device provided by the present invention can be installed on the wall of a room. Through the cavity formed by the sound-absorbing panel and the first housing, a sound-absorbing layer and a speaker are arranged inside the cavity, which can reduce the vibration of the canvas and the volume of the acoustic processing device while not affecting the sound quality of the speaker.

[0032] See Figure 1 and Figure 2 , the acoustic processing device 1 of this embodiment includes a decorative painting layer 11, a light-shielding cloth 12, a sound-absorbing panel 13, a first housing 14, and a back panel 15. Among them, the decorative painting layer 11 is a sound-transmitting cloth. The decorative painting layer 11 can be made of a cloth or paper material printed with artistic patterns, and various artworks, photos, or decorative patterns can be displayed on its surface. The decorative painting layer 11, the light-shielding cloth 12, and the sound-absorbing panel 13 are arranged on the first side of the first housing 14, the sound-absorbing panel 13 is arranged between the decorative painting layer 11 and the first housing 14, and the light-shielding cloth 12 is arranged between the decorative painting layer 11 and the sound-absorbing panel 13.

[0033] See Figure 3 , Figure 4 and Figure 5 , the first housing 14 and the sound-absorbing panel 13 form a cavity. Among them, the first housing 14 includes a bottom plate 143, and a plurality of side walls 142 surround the bottom plate 143. A plurality of sound-absorbing perforations 131 are provided on the sound-absorbing panel 13. The aperture and perforation rate of the sound-absorbing perforations 131 are based on It is calculated. Among them, f is the absorption frequency, c is the speed of sound, σ is the perforation rate (the percentage of the hole area to the plate area), D is the thickness of the air layer behind the sound-absorbing panel 13, t is the thickness of the sound-absorbing panel 13, and d is the hole diameter. In order to absorb more frequency bands, sound-absorbing perforations 131 with different hole diameters are designed according to different absorption frequencies. To prevent the low-frequency sound of the low-frequency speaker from overflowing from the front, the sound-absorbing perforations are in a diffused shape. The first housing 14 and the sound-absorbing panel 13 form a cavity, and the ambient sound passes through the cavity formed by the sound-absorbing panel 13 and the first housing 14 and is absorbed according to the Helmholtz principle.

[0034] The sound-absorbing panel 13 is provided with a first perforation 132 and a second perforation 133. The mid-frequency speaker 21 passes through the first perforation 132, and the high-frequency speaker 22 passes through the second perforation 133. The first perforation 132 and the second perforation 133 are provided so that the sounds of the mid-frequency speaker 21 and the high-frequency speaker 22 are not absorbed.

[0035] A first sound-absorbing layer, a second sound-absorbing layer 33 and a speaker are arranged inside the cavity. The first sound-absorbing layer is arranged around the speaker, the second sound-absorbing layer is arranged on the second side of the first sound-absorbing layer, and the first side of the first sound-absorbing layer is the sound-absorbing panel 13.

[0036] Among them, the first sound-absorbing layer includes a first sound-absorbing structure 32 and a second sound-absorbing structure 31, and the density of the first sound-absorbing structure 32 is less than that of the second sound-absorbing structure 31. The density of the second sound-absorbing layer 33 is greater than that of the first sound-absorbing structure 32, and the density of the second sound-absorbing layer 33 is greater than that of the second sound-absorbing structure 31. Among them, the first sound-absorbing structure 32 is a low-density polyester fiber, which can absorb high-frequency sounds. The second sound-absorbing structure 31 is a medium-density polyester fiber, which can absorb a wide frequency band. After the ambient sound in the room passes through the perforated plate, it passes through the first sound-absorbing layer and the second sound-absorbing layer 33. The ambient sound is reflected in the cavity and is repeatedly absorbed by the first sound-absorbing layer and the second sound-absorbing layer 33, thereby reducing the reverberant ambient sound in the room.

[0037] The speaker is provided with a low-frequency speaker array 23, a mid-frequency speaker 21 and a high-frequency speaker 22. The mid-frequency speaker 21 and the high-frequency speaker 22 face the painting layer 11. The diaphragms of the respective low-frequency speakers of the low-frequency speaker array 23 face the side wall 142 of the first housing 14. The mid-frequency speaker 21 and the high-frequency speaker 22 face the painting layer 11. The mid-frequency and high-frequency sounds will not vibrate the canvas of the painting layer 11, so the mid-frequency speaker 21 and the high-frequency speaker 22 face the painting layer 11. The diaphragms of the respective low-frequency speakers of the low-frequency speaker array 23 face the side wall of the first housing, so that the low-frequency sound is emitted from the side of the acoustic treatment device, thereby reducing the vibration of the painting layer 11.

[0038] The diaphragms of the respective low-frequency speakers of the low-frequency speaker array 23 are arranged facing the first sound-absorbing structure 32, and the second sound-absorbing structure 31 is arranged on one side of the first sound-absorbing structure 32 and the low-frequency speaker array 23. Refer to Figure 6 , the low-frequency speaker array 23 includes a first low-frequency speaker 2311 and a second low-frequency speaker 2313. The first low-frequency speaker 2311 is provided with a first diaphragm 2321 of the first low-frequency speaker 2311, and the second low-frequency speaker 2313 is provided with a second diaphragm 2322 of the second low-frequency speaker 2313. The first diaphragm 2321 of the first low-frequency speaker 2311 and the second diaphragm 2322 of the second low-frequency speaker 2313 are arranged facing the first sound-absorbing structure 32.

[0039] The first low-frequency speaker 2311 and the second low-frequency speaker 2313 are arranged back to back, and the rear cavity of the first low-frequency speaker 2311 communicates with the rear cavity of the second low-frequency speaker 2313, that is, the first low-frequency speaker 2311 and the second low-frequency speaker 2313 share a rear cavity 231, reducing the volume of the acoustic processing device. The first low-frequency speaker 2311 and the second low-frequency speaker 2313 are arranged back to back, and this layout increases the directivity of the low-frequency sound, so that the low-frequency sound is emitted from the side of the acoustic processing device. In addition, through the directivity setting of the low-frequency speaker array 23, the sound of the low-frequency speaker array 23 does not bounce and absorb in the cavity. Specifically, the low-frequency speaker array 23 is set to at least one, and each low-frequency speaker array 23 is arranged facing the first sound-absorbing structure 32.

[0040] The first low-frequency speaker 2311 and the second low-frequency speaker 2313 are arranged facing the first sound-absorbing structure 32. Since the low-density first sound-absorbing structure 32 does not absorb low-frequency sound, when the low-frequency speaker array 23 works, the sound passes through the first sound-absorbing structure 32 and diffuses outward. And the high-frequency noise generated by the low-frequency speaker array will be absorbed by the first sound-absorbing structure 32, making the low-frequency sound purer.

[0041] Openings 141 are provided on the side wall 142 of the bottom plate 143 facing the low-frequency speaker array 23, so that the low-frequency sound can be smoothly diffused to the outside.

[0042] The first low-frequency speaker 2311 and the second low-frequency speaker 2313 are runway-shaped speakers; the width direction of the runway-shaped speakers is parallel to the arrangement direction of the decorative painting layer, the sound-absorbing board and the first housing, thereby reducing the volume of the acoustic processor.

[0043] Refer to Figure 7 , a hook 16 is provided on the second side of the back plate 15. The hook is made of plastic material, which prevents the acoustic processing device 1 from making fine impacts with the wall surface during vibration to generate noise, and also prevents resonance with the wall surface to generate noise.

[0044] The acoustic processing device 1 of this embodiment can be installed on the wall of a room and has the effects of sound absorption and sound amplification. Among them, by setting the sound absorption board 13 and the first housing 14, since the sound absorption board 13 and the sound absorption board 13 form a cavity, and a first sound absorption layer and a second sound absorption layer 33 are provided inside the cavity. When the room ambient sound passes through the sound absorption board 13 and reaches the cavity, according to the Helmholtz principle, when the reverberant sound of the room environment is reflected in the cavity, when the sound enters from the sound absorption board, it causes reciprocating movement of the air, and the sound energy is converted into heat energy and consumed through friction. And the speaker is arranged in the cavity. Since the speaker requires a certain rear cavity to isolate the front and rear sound waves, by arranging the speaker in the cavity and sharing a cavity with the sound absorption structure, the volume of the acoustic processing device can be reduced. In addition, since the mid-frequency speaker 21 and the high-frequency speaker 22 face the decorative painting layer, and the diaphragms of the respective low-frequency speakers of the low-frequency speaker array 23 face the side wall of the first housing. Since the wavelength of the low-frequency sound is too long and the vibration amplitude is large, while ensuring that the decorative painting layer does not vibrate, the low-frequency quality is ensured without loss. Through the setting of the acoustic processing device 1, the ambient sound in the room is absorbed, so that when the sound of the speaker in the acoustic processing device 1 spreads to the room, it is not affected by the room ambient sound.

[0045] The above are only the preferred embodiments of the present invention, but the design concept of the invention is not limited thereto. Without departing from the inventive concept, more other equivalent embodiments can be included. Those skilled in the art can make various obvious changes, re-adjustments and substitutions without departing from the protection scope of the present invention.

Claims

1. An acoustic processing device, characterized in that, It includes a decorative painting layer, a sound-absorbing panel and a first housing. The decorative painting layer and the sound-absorbing panel are arranged on the first side of the first housing. The sound-absorbing panel is arranged between the decorative painting layer and the first housing, and a cavity is formed between the first housing and the sound-absorbing panel; Inside the cavity, there are a first sound-absorbing layer, a second sound-absorbing layer and a speaker. The first sound-absorbing layer is arranged around the speaker, and the second sound-absorbing layer is arranged on the second side of the first sound-absorbing layer; The speaker is provided with a low-frequency speaker array, a mid-frequency speaker and a high-frequency speaker. The mid-frequency speaker and the high-frequency speaker are arranged facing the decorative painting layer, and the diaphragms of the low-frequency speakers in the low-frequency speaker array are arranged facing the side wall of the first housing; There are a plurality of sound-absorbing perforations on the sound-absorbing panel.

2. The acoustic processing device according to claim 1, characterized in that: The first sound-absorbing layer is provided with a first sound-absorbing structure and a second sound-absorbing structure, and the density of the first sound-absorbing structure is less than the density of the second sound-absorbing structure; The diaphragms of the low-frequency speakers in the low-frequency speaker array are arranged facing the first sound-absorbing structure, and the second sound-absorbing structure is arranged on one side of the first sound-absorbing structure and the low-frequency speaker array.

3. The acoustic processing device according to claim 2, characterized in that: The low-frequency speaker array includes a first low-frequency speaker and a second low-frequency speaker; The first low-frequency speaker and the second low-frequency speaker are arranged back to back, and the rear cavity of the first low-frequency speaker is communicated with the rear cavity of the second low-frequency speaker; The first low-frequency speaker and the second low-frequency speaker are arranged facing the first sound-absorbing structure.

4. The acoustic processing device according to claim 3, characterized in that: The first low-frequency speaker and the second low-frequency speaker are runway speakers; The width direction of the runway speaker is parallel to the arrangement direction of the decorative painting layer, the sound-absorbing panel and the first housing.

5. The acoustic processing device according to claim 2, characterized in that: The density of the second sound-absorbing layer is greater than the density of the first sound-absorbing structure, and the density of the second sound-absorbing layer is greater than the density of the second sound-absorbing structure.

6. The acoustic processing device according to any one of claims 1 to 5, characterized in that: There are a first perforation and a second perforation on the sound-absorbing panel. The mid-frequency speaker passes through the first perforation, and the high-frequency speaker passes through the second perforation.

7. The acoustic processing device according to any one of claims 1 to 5, characterized in that: A back plate is arranged on the second side of the first housing, and a hook is arranged on the second side of the back plate.

8. The acoustic processing device according to any one of claims 1 to 5, characterized in that: The first housing includes a bottom plate, and a plurality of side walls surround the bottom plate. There are openings on the side wall facing the low-frequency speaker array.

9. The acoustic processing device according to any one of claims 1 to 5, characterized in that: A light-shielding cloth is arranged between the sound-absorbing panel and the decorative painting layer.

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