Acoustic treatment device
By setting speakers in the cavity and sound-absorbing layers of different densities in the acoustic treatment device, the problem of combining canvas vibration with sound absorption and amplification is solved, and an acoustic effect of high sound quality and low volume is achieved.
Patent Information
- Application Number
- CN202510771582.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-11
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2045-06-11
AI Technical Summary
Existing sound-amplifying canvas products have the problem of canvas vibration when playing audio and cannot combine sound absorption and sound amplification functions. Existing technology makes it difficult to reduce the volume without affecting the sound quality.
A cavity is formed by a decorative painting layer, a sound-absorbing panel and a shell, with the first and second sound-absorbing layers and speakers arranged inside. The speakers are arranged in the cavity, the diaphragm of the low-frequency speaker array faces the side wall of the shell, and the mid- and high-frequency speakers face the decorative painting layer. Sound energy is absorbed through the Helmholtz principle, and runway-type speakers and sound-absorbing structures of different densities are arranged to reduce vibration and volume.
It effectively reduces canvas vibration, ensures the integrity of sound quality, achieves the combination of sound absorption and sound amplification, and reduces the volume of the acoustic treatment device.
Smart Images
Figure CN120343471B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of acoustic processing devices, in particular to a mural-type acoustic processing device. Background Art
[0002] Existing sound-amplifying canvas products that also feature audio playback are gaining traction. These products aim to integrate speakers behind the canvas, distributing sound through the canvas to achieve a perfect marriage of artistic display and audio output. However, there are currently two major technical bottlenecks in this field that need to be addressed.
[0003] First, there's no way to fundamentally address the canvas vibration caused by sound amplification. Sound is generated and propagated by air vibration. When the speakers are hidden behind the canvas, the sound propagates through it, inevitably causing it to vibrate. Existing technologies face a difficult technical bottleneck. To reduce canvas vibration, they can only significantly sacrifice sound quality by cutting out the low-frequency content of the audio, severely impacting the integrity and quality of the audio playback.
[0004] Second, it is impossible to achieve both sound absorption and sound amplification functions. Currently, sound-absorbing and sound-amplifying paintings are more common on the market, but products that have both sound absorption and sound amplification functions are in a state of lack. This is mainly because the difficulty of the relevant technologies has not yet been overcome. If the existing technology is directly combined with sound amplification and sound absorption technology, there are two implementation methods, but both have obvious defects. One is that the sound amplification equipment is located in front of the sound-absorbing equipment. In this case, although the sound absorbing equipment will not affect the sound quality of the sound amplification equipment, it will block the sound propagation path, resulting in poor sound absorption effect and the overall equipment is bulky. The other is that the sound amplification equipment is located behind the sound absorbing equipment. The amplified sound will be blocked or absorbed by the sound absorbing equipment, which will greatly affect the sound quality. At the same time, the equipment is not only very large, but the sound quality is also difficult to guarantee. Summary of the Invention
[0005] A first object of the present invention is to provide an acoustic processing device that reduces volume, reduces canvas vibration, and ensures output sound quality.
[0006] To achieve the first objective of the present invention, the present invention provides an acoustic treatment device, comprising a decorative painting layer, a sound-absorbing panel and a first shell, wherein the decorative painting layer and the sound-absorbing panel are arranged on a first side of the first shell, the sound-absorbing panel is arranged between the decorative painting layer and the first shell, and the first shell and the sound-absorbing panel form a cavity; a first sound-absorbing layer, a second sound-absorbing layer and a speaker are arranged inside the cavity, the first sound-absorbing layer is arranged around the speaker, and the second sound-absorbing layer is arranged on a 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 diaphragm of each low-frequency speaker of the low-frequency speaker array is arranged toward the side wall of the first shell; a plurality of sound-absorbing perforations are provided on the sound-absorbing panel.
[0007] As can be seen from the above scheme, since the sound-absorbing panel and the first shell form a cavity, and the first and second sound-absorbing layers are located within the cavity, when the room ambient sound passes through the sound-absorbing panel and reaches the cavity, according to the Helmholtz principle, when the sound enters the sound-absorbing panel, it triggers reciprocating air movement, converting the sound energy into heat energy through friction. The speaker is located within the cavity. Since speakers require a certain back cavity to isolate the front and rear sound waves, by placing the speaker within the cavity, it shares a cavity with the sound-absorbing structure, thus reducing the volume of the acoustic treatment device. Furthermore, since the mid-range and tweeter speakers are positioned facing the decorative painting layer, and the diaphragms of the individual woofers in the woofer array are positioned toward the side walls of the first shell, due to the long wavelength and large vibration amplitude of low-frequency sound, this ensures that the decorative painting layer does not vibrate while also ensuring that the low-frequency quality is not compromised.
[0008] 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 diaphragm of each low-frequency speaker of the low-frequency speaker array is 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.
[0009] As can be seen from this, because the density of the first sound-absorbing structure is lower than that of the second sound-absorbing structure, the first sound-absorbing structure has the lowest density. Since the low-density sound-absorbing structure does not absorb low-frequency sounds, but absorbs mid-frequency and high-frequency sounds, when the low-frequency speaker array is operating, the sound passes through the first sound-absorbing structure and diffuses outward. Meanwhile, the high-frequency noise generated by the low-frequency speaker array is absorbed by the first sound-absorbing structure, making the low-frequency sound purer.
[0010] In a further embodiment, 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 connected to 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.
[0011] As can be seen, since the first and second woofers are arranged back-to-back, the rear cavity of the first woofer is connected to the rear cavity of the second woofer, so the first and second woofers share a common rear cavity, thereby reducing the volume of the acoustic treatment device. In addition, the first and second woofers are arranged back-to-back, and the array layout can increase the directionality of low-frequency sounds, so that low-frequency sounds are emitted from the sides of the acoustic treatment device.
[0012] In a further embodiment, the first low-frequency loudspeaker and the second low-frequency loudspeaker are runway-type loudspeakers; the width direction of the runway-type loudspeaker is parallel to the arrangement direction of the decorative painting layer, the sound absorbing panel and the first shell.
[0013] It can be seen that since the first low-frequency loudspeaker and the second low-frequency loudspeaker are runway-type loudspeakers, the volume of the acoustic processor is reduced.
[0014] In a further embodiment, 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.
[0015] As can be seen, the second sound-absorbing layer, made of the highest-density polyester fiber, absorbs mid- and low-frequency ambient sound. The first sound-absorbing structure, made of low-density polyester fiber, absorbs high-frequency sound. The second sound-absorbing structure, made of medium-density polyester fiber, absorbs a wide frequency range. After passing through the perforated panel, the ambient sound in the room passes through the first and second sound-absorbing layers, where it is reflected within the cavity and repeatedly absorbed, thereby reducing the reverberant ambient sound in the room.
[0016] In a further solution, a first through-hole and a second through-hole are provided on the sound absorbing panel, the intermediate frequency speaker passes through the first through-hole, and the high frequency speaker passes through the second through-hole.
[0017] It can be seen that the first perforation and the second perforation are provided so that the sounds of the mid-range speaker and the high-frequency speaker are not absorbed.
[0018] In a further solution, a back plate is provided on the second side of the first shell, and a hook is provided on the second side of the back plate.
[0019] It can be seen that the hook is made of plastic, which prevents the acoustic treatment device from making noise due to slight impact with the wall during vibration, and also prevents resonance with the wall from generating noise.
[0020] In a further solution, the first shell includes a bottom plate, the bottom plate is surrounded by a plurality of side walls, and the side walls facing the low-frequency speaker array are provided with openings.
[0021] It can be seen that 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.
[0022] In a further solution, a blackout cloth is provided between the sound-absorbing panel and the decorative painting layer.
[0023] This shows that by setting the blackout cloth, the beauty of the decorative painting layer is not affected. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 It is a structural schematic diagram of an embodiment of the acoustic processing device of the present invention.
[0025] Figure 2 It is a structural exploded view of an embodiment of the acoustic processing device of the present invention.
[0026] Figure 3It is a structural diagram of the sound-absorbing panel, mid-range speaker and low-frequency speaker of an embodiment of the acoustic treatment device of the present invention.
[0027] Figure 4 It is a structural diagram of the interior of the cavity of an embodiment of the acoustic processing device of the present invention.
[0028] Figure 5 It is a structural exploded view of the first sound-absorbing layer, the speaker, the second attraction layer and the first shell of the acoustic treatment device embodiment of the present invention.
[0029] Figure 6 It is a structural diagram of a low-frequency speaker array of an embodiment of the acoustic processing device of the present invention.
[0030] Figure 7 It is a structural diagram of an embodiment of the acoustic processing device of the present invention from another perspective.
[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION
[0032] The acoustic treatment device provided by the present invention can be installed on the wall of a room. A cavity is formed by a sound-absorbing panel and a first shell, and an attraction layer and a speaker are arranged inside the cavity. This reduces the vibration of the canvas and the volume of the acoustic treatment device without affecting the sound quality of the speaker.
[0033] See also Figure 1 and Figure 2 The acoustic treatment device 1 of this embodiment includes a decorative painting layer 11, a blackout cloth 12, a sound-absorbing panel 13, a first housing 14, and a back panel 15. The decorative painting layer 11 is a sound-permeable cloth. The decorative painting layer 11 can be made of cloth or paper printed with artistic patterns, and its surface can display various artworks, photos, or decorative patterns. The decorative painting layer 11, blackout cloth 12, and sound-absorbing panel 13 are arranged on a first side of the first housing 14, with the sound-absorbing panel 13 positioned between the decorative painting layer 11 and the first housing 14, and the blackout cloth 12 positioned between the decorative painting layer 11 and the sound-absorbing panel 13.
[0034] See also Figure 3 、 Figure 4 and Figure 5 The first shell 14 and the sound absorbing plate 13 form a cavity. The first shell 14 includes a bottom plate 143, and the bottom plate 143 is surrounded by a plurality of side walls 142. The sound absorbing plate 13 is provided with a plurality of sound absorbing perforations 131. The aperture and perforation rate of the sound absorbing perforations 131 are determined according to the Calculated. Where f is the absorption frequency, c is the speed of sound, σ is the perforation ratio (percentage of hole area to panel area), D is the thickness of the air layer behind the sound-absorbing panel 13, t is the thickness of the panel 13, and d is the aperture. To absorb a wider range of frequencies, sound-absorbing perforations 131 are designed with different apertures according to different absorption frequencies. To prevent low-frequency sound from the woofer from escaping from the front, the sound-absorbing perforations are diffuse. The first housing 14 and the sound-absorbing panel 13 form a cavity. Ambient sound passes through this cavity formed by the panel 13 and the first housing 14 and is absorbed according to the Helmholtz principle.
[0035] The sound absorbing plate 13 is provided with a first through-hole 132 and a second through-hole 133. The mid-range speaker 21 passes through the first through-hole 132, and the tweeter 22 passes through the second through-hole 133. The first through-hole 132 and the second through-hole 133 are provided so that the sound of the mid-range speaker 21 and the tweeter 22 is not absorbed.
[0036] The cavity is provided with a first sound absorbing layer, a second sound absorbing layer 33 and a speaker. The first sound absorbing layer is provided around the speaker, the second sound absorbing layer is provided on the second side of the first sound absorbing layer, and the first side of the first sound absorbing layer is a sound absorbing board 13.
[0037] The first sound-absorbing layer includes a first sound-absorbing structure 32 and a second sound-absorbing structure 31. The density of the first sound-absorbing structure 32 is lower than that of the second sound-absorbing structure 31. The density of the second sound-absorbing layer 33 is higher than that of the first sound-absorbing structure 32, which is higher than that of the second sound-absorbing structure 31. The first sound-absorbing structure 32 is made of low-density polyester fiber, which absorbs high-frequency sounds. The second sound-absorbing structure 31 is made of medium-density polyester fiber, which absorbs broadband sounds. After passing through the perforated plate, the ambient sound in the room passes through the first and second sound-absorbing layers 33. The ambient sound is reflected within the cavity and repeatedly absorbed by the first and second sound-absorbing layers 33, thereby reducing the reverberant ambient sound in the room.
[0038] The speakers include a woofer array 23, mid-range speakers 21, and tweeters 22. The mid-range speakers 21 and tweeters 22 are positioned facing the decorative painting layer 11, with the diaphragms of each woofer in the woofer array 23 facing the sidewall 142 of the first housing 14. The mid-range speakers 21 and tweeters 22 are positioned facing the decorative painting layer 11, so that mid- and high-frequency sounds do not vibrate the canvas of the decorative painting layer 11. The diaphragms of each woofer in the woofer array 23 facing the sidewall of the first housing allow low-frequency sounds to be emitted from the sides of the acoustic treatment device, thereby reducing vibration of the decorative painting layer 11.
[0039] The diaphragm of each low-frequency speaker of the low-frequency speaker array 23 is 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. Figure 6 The woofer array 23 includes a first woofer 2311 and a second woofer 2313. The first woofer 2311 includes a first diaphragm 2321, and the second woofer 2313 includes a second diaphragm 2322. The first diaphragm 2321 of the first woofer 2311 and the second diaphragm 2322 of the second woofer 2313 are disposed facing the first sound absorbing structure 32.
[0040] The first woofer 2311 and the second woofer 2313 are arranged back-to-back, with the rear cavity of the first woofer 2311 connected to the rear cavity of the second woofer 2313. This means that the first woofer 2311 and the second woofer 2313 share a single rear cavity 231, reducing the volume of the acoustic treatment device. The first woofer 2311 and the second woofer 2313 are arranged back-to-back. This layout increases the directionality of low-frequency sound, emitting it from the sides of the acoustic treatment device. Furthermore, the directional configuration of the woofer array 23 prevents sound from bouncing around and being absorbed by the cavity. Specifically, at least one woofer array 23 is provided, with each woofer array 23 facing the first sound-absorbing structure 32.
[0041] The first woofer 2311 and the second woofer 2313 are positioned facing the first sound-absorbing structure 32. Because the low-density first sound-absorbing structure 32 does not absorb low-frequency sounds, when the woofer array 23 is operating, the sound passes through the first sound-absorbing structure 32 and diffuses outward. However, the high-frequency noise generated by the woofer array is absorbed by the first sound-absorbing structure 32, resulting in a purer low-frequency sound.
[0042] The side wall 142 of the bottom plate 143 facing the low-frequency speaker array 23 is provided with an opening 141 so that the low-frequency sound can be smoothly diffused to the outside.
[0043] The first low-frequency speaker 2311 and the second low-frequency speaker 2313 are runway-type speakers; the width direction of the runway-type speakers is parallel to the arrangement direction of the decorative painting layer, the sound-absorbing panel and the first shell, thereby reducing the volume of the acoustic processor.
[0044] See also Figure 7 A hook 16 is provided on the second side of the back plate 15. The hook is made of plastic material to prevent the acoustic treatment device 1 from making noises due to slight impacts with the wall during vibration, and also to prevent resonance with the wall from generating noises.
[0045] The acoustic treatment device 1 of this embodiment can be installed on a room wall, achieving both sound absorption and amplification. The sound-absorbing panel 13 and the first housing 14 form a cavity, within which are disposed the first and second sound-absorbing layers 33. When ambient room sound passes through the panel 13 and reaches the cavity, the reverberant sound of the room reflects within the cavity according to the Helmholtz principle. When the sound enters the panel, it induces reciprocating air motion, converting the sound energy into heat through friction. The speaker is located within the cavity. Since speakers require a certain back cavity to isolate front and rear sound waves, by placing the speaker within the cavity, it shares a cavity with the sound-absorbing structure, thus reducing the size of the acoustic treatment device. Furthermore, since the mid-range speaker 21 and tweeter 22 are positioned facing the decorative painting layer, and the diaphragms of the individual woofers in the woofer array 23 face the sidewalls of the first housing, low-frequency sound has a long wavelength and large vibration amplitude. This prevents vibration of the decorative painting layer while also ensuring low-frequency quality. By setting up the acoustic processing device 1, the ambient sound in the room is absorbed, so that the sound of the speaker in the acoustic processing device 1 is not affected by the ambient sound in the room when it diffuses into the room.
[0046] The above are only preferred embodiments of the present invention, but the design concept of the invention is not limited thereto. Without departing from the concept of the present invention, more other equivalent embodiments may be included. It is obvious that various changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention.
Claims
1. An acoustic processing device, characterized in that The decorative painting layer comprises a sound-absorbing board and a first shell, wherein the decorative painting layer and the sound-absorbing board are arranged on a first side of the first shell, the sound-absorbing board is arranged between the decorative painting layer and the first shell, and the first shell and the sound-absorbing board form a cavity; A first sound absorbing layer, a second sound absorbing layer and a speaker are arranged inside the cavity, 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 diaphragm of each low-frequency speaker of the low-frequency speaker array is arranged toward the side wall of the first shell; The sound absorbing plate is provided with a plurality of sound absorbing perforations; Ambient sound passes through the sound absorbing panel and reaches the cavity, and is absorbed according to the Helmholtz principle.
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 smaller than the density of the second sound absorbing structure; The diaphragm of each low-frequency speaker of the low-frequency speaker array is arranged to face 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 connected to 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 racetrack 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 shell.
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: The sound absorbing plate is provided with a first through-hole and a second through-hole. The intermediate frequency speaker passes through the first through-hole, and the high frequency speaker passes through the second through-hole.
7. The acoustic processing device according to any one of claims 1 to 5, characterized in that: A back plate is provided on the second side of the first shell, and a hook is provided 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 shell includes a bottom plate, the bottom plate is surrounded by a plurality of side walls, and the side walls facing the low-frequency speaker array are provided with openings.
9. The acoustic processing device according to any one of claims 1 to 5, characterized in that: A blackout cloth is provided between the sound absorbing board and the decorative painting layer.