CN218351121U

CN218351121U - Low-frequency sound-absorbing device

Info

Publication number: CN218351121U
Application number: CN202222392497.9U
Authority: CN
Inventors: 刘敬华; 卢素萍
Original assignee: Guangdong Liyin Acoustics Technology Co ltd
Current assignee: Guangdong Liyin Acoustics Technology Co ltd
Priority date: 2022-09-06
Filing date: 2022-09-06
Publication date: 2023-01-20
Anticipated expiration: 2032-09-06

Abstract

The utility model discloses a low-frequency sound absorption device, which comprises a sound transmission cloth layer, a sound transmission plate layer, a sound absorption cotton layer, a sound absorption black paper layer and a resonance body layer; the sound transmission cloth layer, the sound transmission plate layer, the sound absorption cotton layer, the sound absorption black paper layer and the resonance body layer are sequentially arranged, and the sound transmission plate layer is provided with a plurality of sound transmission holes communicated with the sound transmission cloth layer and the sound absorption cotton layer. The technical scheme provided by the low-frequency sound absorption device has a good absorption effect on low-frequency sound with the frequency of about 125Hz to 250Hz, can be used as an excellent low-frequency sound absorber, and can be used for special frequency spectrum sound absorption.

Description

Low-frequency sound-absorbing device

Technical Field

The utility model belongs to the technical field of building interior decoration acoustic treatment, concretely relates to sound device is inhaled to low frequency.

Background

In various acoustic places such as recording rooms, control rooms, audio-visual rooms, home theaters and the like with high requirements on sound insulation, the sound-absorbing body is used as a good sound-absorbing decorative material and is generally suitable for wallboards, ceiling boards and the like in the acoustic places.

At present, most of sound absorbing body materials on the market adopt polyester fiber sound absorbing boards, the polyester fiber sound absorbing boards are decorative materials which are made of polyester fibers through hot press molding and have sound absorbing functions, the interior shape design is more flexible and changeable due to the characteristics of changeable colors and shapes, the polyester fiber sound absorbing boards are inspected for fireproof parameters through the national fireproof detection center, and the results show that the sound absorbing boards have better fireproof performance, and although the existing polyester fiber sound absorbing boards have better high-frequency sound treatment, the sound absorbing boards cannot effectively diffuse low-frequency sound. In life, low-frequency noise is ubiquitous, and the low-frequency noise sources of residential communities mainly fall into 5 categories: elevators, transformers, water pumps in high-rise buildings, central air conditioners (including cooling towers), traffic noise, etc. If the patient is attacked by low-frequency noise for a long time, various neurosis such as neurasthenia, insomnia, headache and the like can be easily caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a sound device is inhaled to low frequency has good sound effect of inhaling to low frequency sound, is outstanding low frequency sound absorber, can be used to special frequency spectrum sound absorption.

The technical scheme for achieving the purpose comprises the following steps.

A low-frequency sound absorption device comprises a sound transmission cloth layer, a sound transmission plate layer, a sound absorption cotton layer, a sound absorption black paper layer and a resonance body layer; the sound transmission cloth layer, the sound transmission plate layer, inhale the cotton layer of sound, inhale sound black paper layer and resonance body layer and arrange the setting in proper order, a plurality of intercommunications have been seted up on the sound transmission plate layer the sound transmission cloth layer with inhale the sound hole on the cotton layer of sound.

In some embodiments, the thickness of the sound-transmitting plate layer ranges from 3mm to 8mm, the aperture of the sound-transmitting holes on the sound-transmitting plate layer ranges from 3mm to 10mm, and the central hole distance between two adjacent sound-transmitting holes ranges from 13mm to 30mm.

In some embodiments, the sound transmission holes are regular hexagonal holes, and the sound transmission holes are arranged at intervals in the transverse direction and the vertical direction to form an array structure.

In some embodiments, the sound-transmitting cloth layer is one of cotton cloth, chemical fiber cloth, blended cloth, metal fiber cloth or non-woven cloth with sound transmission rate of more than or equal to 90%.

In some embodiments, the thickness of the sound absorption cotton layer ranges from 20mm to 40mm, and the density of the sound absorption cotton layer ranges from 45k to 55k.

In some embodiments, the resonator layer has a plurality of resonant cavities, and the resonant cavities are arranged in a horizontal direction and a vertical direction to form an array structure.

In some embodiments, two rows of resonant cavities from the head to the tail in the respective directions of the resonator layer in the transverse direction and the vertical direction are first cavities, two rows of resonant cavities at the intersection of the transverse direction and the vertical direction are second cavities, the rest of the resonant cavities are third cavities, and the radial areas of the first cavities, the second cavities and the third cavities are sequentially reduced.

In some of them embodiments, sound device is inhaled to low frequency still includes the casing, the casing has open-top's holding tank, pass through the acoustic sheet layer, inhale the cotton layer of sound, inhale the sound black paper layer and the resonance body layer all range upon range of set up in the holding tank, pass through the acoustic cloth layer lid fit the open end of casing, just pass through the acoustic cloth layer with be formed with the space between the acoustic sheet layer.

In some of these embodiments, the housing comprises a bottom plate, a connecting plate, and four side plates; four the curb plate vertical set up in the bottom plate, and four the curb plate with the bottom plate encloses to close and forms the holding tank, the connecting plate is the loop configuration, the connecting plate set up in the curb plate is kept away from the one end of bottom plate, the sound-transmitting cloth layer lid fits on the connecting plate, and sound-transmitting cloth layer court one side of connecting plate is folded and is pressed from both sides and locate position between connecting plate and the curb plate.

In some embodiments, the side wall of the housing corresponding to the resonator layer is provided with a plurality of through holes along the circumferential direction thereof, the through holes being communicated with the resonator layer, and each through hole is covered with a cover body.

The utility model provides a technical scheme has following advantage and effect:

the low-frequency sound absorption device is formed by sequentially arranging and matching a sound transmission cloth layer, a sound transmission plate layer, a sound absorption cotton layer, a sound absorption black paper layer and a resonator layer to form a multi-layer composite material, wherein the sound transmission cloth layer can enable sound to penetrate into the low-frequency sound absorption device; the sound transmitting plate layer and the sound absorbing cotton layer are matched to have an excellent absorption effect on sound with the frequency of about 250Hz, sound allowance penetrates through the sound absorbing black paper layer to be further absorbed and then is transmitted to the resonance body layer, and the absorption effect on the sound with the frequency of about 125Hz is further enlarged through resonance, so that the low-frequency sound absorbing device has a good absorption effect on low-frequency sound with the frequency of about 125Hz to 250Hz, can be used as an excellent low-frequency sound absorber and can be used for special frequency spectrum sound absorption.

Drawings

Fig. 1 is a schematic structural view of a low frequency sound absorbing device according to an embodiment of the present invention;

fig. 2 is a schematic longitudinal sectional view of the low frequency sound absorbing device of fig. 1;

fig. 3 is an enlarged schematic view of the low frequency sound absorbing apparatus of fig. 2 at a.

Description of reference numerals:

100. a low frequency sound absorbing device;

1. an acoustically transparent cloth layer; 2. an acoustically transparent sheet layer; 21. an acoustically transparent aperture; 3. a sound absorbing cotton layer; 4. a sound-absorbing black paper layer; 5. a resonator layer; 51. a resonant cavity; 52. a first chamber; 53. a second chamber; 54. a third chamber; 6. a housing; 61. a base plate; 62. a side plate; 63. a connecting plate; 64. and a through hole.

Detailed Description

To facilitate understanding of the present invention, specific embodiments thereof will be described in more detail below with reference to the accompanying drawings.

As used herein, "first and second" \ 8230 "are used unless otherwise indicated or defined and are used merely to distinguish between names and do not denote any particular quantity or order.

As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items, unless otherwise specified or defined.

It should be noted that "fixed to" or "connected to" in this document may be directly fixed to or connected to one element or may be indirectly fixed to or connected to one element.

The utility model provides a low frequency sound absorption device 100, as shown in fig. 1 to fig. 3, the low frequency sound absorption device 100 comprises a sound transmission cloth layer 1, a sound transmission plate layer 2, a sound absorption cotton layer 3, a sound absorption black paper layer 4 and a resonance body layer 5; the utility model discloses a sound transmission cloth layer, sound transmission plate layer 2, inhale cotton layer 3 of sound, inhale black paper layer 4 and resonance body layer 5 and arrange the setting in proper order, sound transmission plate layer 2 has seted up a plurality of intercommunications sound transmission cloth layer 1 with inhale the sound hole 21 on cotton layer 3 of sound. Specifically, the surface sound-transmitting cloth layer 1 enables sound to penetrate into the interior of the low-frequency sound-absorbing device 100; the sound-transmitting sheet layer 2 and the sound-absorbing cotton layer 3 have an excellent effect of absorbing sound at a frequency of about 250Hz, and the remaining sound is further absorbed by the sound-absorbing black paper layer 4 and then transmitted to the resonance body layer 5, thereby further increasing the absorption of sound at a frequency of about 125Hz by resonance. Therefore, the low frequency sound absorbing device 100 processes sound through the cooperation of the multi-layer composite material, can well absorb low frequency sound with the frequency of about 125Hz to 250Hz, is an excellent low frequency sound absorber, and can be used for special frequency spectrum sound absorption.

In summary, in the low frequency sound absorbing device 100, the sound transmitting cloth layer 1, the sound transmitting board layer 2, the sound absorbing cotton layer 3, the sound absorbing black paper layer 4, and the resonator layer 5 are sequentially disposed and matched to form a multi-layer composite material, so that the low frequency sound absorbing device can have a good absorbing effect on low frequency sounds with frequencies of about 125Hz to 250Hz, can be used as an excellent low frequency sound absorber, and can be used for special frequency spectrum sound absorption.

In some embodiments, the thickness of the sound-transmitting plate layer 2 ranges from 3mm to 8mm, such as 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, etc., the aperture of the sound-transmitting holes 21 on the sound-transmitting plate layer 2 ranges from 3mm to 10mm, such as 3mm, 5mm, 7mm, 9mm, 10mm, etc., and the center hole distance between two adjacent sound-transmitting holes 21 ranges from 13mm to 30mm, specifically, the center hole distance refers to the distance between the center of the first sound-transmitting hole 21 and the center of the second sound-transmitting hole 21 in two adjacent sound-transmitting holes 21, such as 3mm, 5mm, 7mm, 9mm, 10mm. Through a large number of tests, the data of the sound-transmitting holes 21 of the sound-transmitting plate layer 2 are made, so that the sound-transmitting plate layer 2 can be matched with the sound-absorbing cotton 3 to have a very excellent absorption effect on sound with a specific frequency of about 250 Hz.

In some embodiments, as shown in fig. 1, the sound-transmitting holes 21 are regular hexagonal holes, and the sound-transmitting holes 21 are arranged at intervals in the transverse direction and the vertical direction to form an array structure. The sound-transmitting holes 21 on the regular hexagon can adjust the attraction coefficient, improve the sound-absorbing effect, facilitate the manufacture, and arrange the sound-transmitting holes 21 in an array to form the uniform sound-absorbing effect. In addition, in other embodiments, the sound-transmitting holes 21 may also be other shapes such as circular holes, irregular holes, etc., and are not limited herein.

In some embodiments, the sound-transmitting cloth layer 1 is one of cotton cloth, chemical fiber cloth, blended cloth, metal fiber cloth or non-woven cloth with sound transmission rate of more than or equal to 90%. The sound transmission rate of the sound-transmitting cloth layer 1 is greater than or equal to 90%, and sound can effectively penetrate into the low-frequency sound-absorbing device 100.

In some embodiments, the thickness of the sound absorbing cotton layer 3 is in the range of 20mm to 40mm, for example 20mm, 25mm, 30mm, 35mm, 40mm, etc., and the density of the sound absorbing cotton layer 3 is in the range of 45k to 55k. The inventor finds through experiments that the sound absorption cotton layer 3 with the specification has very excellent absorption effect on low-frequency sound with the frequency of about 250Hz when being matched with the sound transmission plate layer 2 with the thickness of 3mm to 8 mm.

In some embodiments, the sound absorption black paper layer 4 may be SoundTEX sound absorption paper, which has the characteristics of stable physical and chemical properties, no release of harmful substances and odor, good moisture resistance, and good durability.

In some embodiments, as shown in fig. 1, the resonator layer 5 has a plurality of resonant cavities 51, and the resonant cavities 51 are arranged in a horizontal direction and a vertical direction to form an array structure. The resonant cavity 51 with the array structure can generate a good viscous effect on incident sound in resonance in the resonant cavity 51, so that low-frequency sound can be effectively absorbed.

In some embodiments, as shown in fig. 1, two rows of resonant cavities 51 at the end-to-end of the resonator layer 5 along the respective directions of the transverse direction and the vertical direction are first cavities 52, two rows of resonant cavities 51 at the intersection of the two rows of the transverse direction and the vertical direction of the resonator layer 5 are second cavities 53, the rest of the resonant cavities 51 are third cavities 54, and the radial areas of the first cavities 52, the second cavities 53, and the third cavities 54 become smaller in sequence. Specifically, in the embodiment, the first cavity 52 is a rectangle with a length of 80mm to 120mm and a width of 30mm to 45mm, the second cavity 53 is a square with a side length of 30mm to 45mm, and the third cavity 54 is a square with a side length of 80mm to 120 mm. By forming the resonant cavities 51 at different positions in the resonator layer 5 into different sized cavities, compared to the resonant cavities 51 uniformly arranged, the resonant cavities can adapt to the characteristics of low frequency sound around 125Hz, and have excellent absorption effect on low frequency sound around 125 Hz.

In some embodiments, as shown in fig. 1, the low frequency sound absorption device 100 further includes a housing 6, the housing 6 has a receiving groove with an open top, the sound transmitting plate layer 2, the sound absorbing cotton layer 3, the sound absorbing black paper layer 4, and the resonator layer 5 are stacked in the receiving groove, the sound transmitting cloth layer 1 covers an open end of the housing 6, and a gap is formed between the sound transmitting cloth layer 1 and the sound transmitting plate layer 2. When the low-frequency sound-absorbing device 100 is installed on an installation carrier such as a wall, the low-frequency sound-absorbing device can be hung on the wall through the shell 6, and the external-hanging type module installation structure is convenient to assemble and disassemble, a large amount of back space structures are not required to be reserved like the traditional sound-absorbing body, and the installation space can be saved; in addition, the sound-transmitting cloth layer 1 and the sound-transmitting plate layer 2 are not closely laminated, and a gap exists between the two, so that sound can effectively penetrate through the sound-transmitting cloth layer 1, sufficient space is provided for buffering the sound, the sound can penetrate into the sound-transmitting plate layer 2 to the interior of the sound-absorbing cotton layer 3 as much as possible, and the sound-absorbing effect is further improved.

In some embodiments, the housing 6 is a rectangular aluminum shell structure, and the top surface of the housing 6 is square and has a thickness of 8mm to 18mm, for example, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, etc., which can make the low frequency sound absorbing device 100 more resistant to bending and compression, lighter, and more stable in overall structure.

In some embodiments, as shown in fig. 2 and 3, the housing 6 includes a bottom plate 61, a connecting plate 63, and four side plates 62; four curb plate 62 is vertical set up in bottom plate 61, and four curb plate 62 with bottom plate 61 encloses to close and forms the holding tank, connecting plate 63 is the loop configuration, connecting plate 63 set up in curb plate 62 keeps away from the one end of bottom plate 61, sound transmission cloth layer 1 approximately fits on the connecting plate 63, and sound transmission cloth layer 1 court one side of connecting plate 63 is folded and is pressed from both sides and locate position between connecting plate 63 and the curb plate 62. The sound absorbing layers are surrounded by the bottom plate 61, the connecting plate 63 and the four side plates 62, so that the mounting and connection of the layer body structures are more stable, and the displacement is avoided; in addition, the bottom plate 61 and the side plates 62 cooperate to form a box-type structure, which is assembled in a manner that facilitates production, installation, maintenance and replacement, the sound-absorbing structure can be widely applied to sound-building treatment in large areas or small spaces, can form external hanging type installation, does not need a heavy back space structure, and can play a good sound-absorbing effect.

In some embodiments, as shown in fig. 1, the housing 6 has a plurality of through holes 64 corresponding to the side wall of the resonator layer 5 and communicating with the resonator layer 5 along the circumferential direction thereof, and each of the through holes 64 is covered with a cover. Wherein the covering body can be SoundTEX sound absorbing paper. Can be through this through-hole 64 intercommunication each other when a plurality of low frequency sound absorbing device 100 combinations are assembled, increase the propagation path of low frequency sound, can improve the sound absorption effect, wherein this through-hole 64 is the circular port, aligns the setting when being convenient for the combination is assembled. Further, this casing 6 is the regular square body structure, specifically is the square structure in this embodiment to make things convenient for a plurality of low frequencies to inhale sound device 100's combination and assemble, effectively avoid the condition that there is the gap in concatenation department.

The above embodiments are not intended to be exhaustive list of the present invention, and there may be many other embodiments not listed. Any replacement and improvement made on the basis of not violating the concept of the utility model belong to the protection scope of the utility model.

Claims

1. The low-frequency sound absorption device is characterized by comprising a sound transmission cloth layer, a sound transmission plate layer, a sound absorption cotton layer, a sound absorption black paper layer and a resonance body layer; the sound transmission cloth layer, the sound transmission plate layer, the sound absorption cotton layer, the sound absorption black paper layer and the resonance body layer are arranged in sequence, the sound transmission plate layer is provided with a plurality of intercommunications, the sound transmission cloth layer and the sound transmission holes of the sound absorption cotton layer.

2. The low frequency sound absorbing apparatus according to claim 1, wherein the thickness of the sound-transmitting plate layer is in a range of 3mm to 8mm, the diameter of the sound-transmitting holes in the sound-transmitting plate layer is in a range of 3mm to 10mm, and the distance between the center holes of two adjacent sound-transmitting holes is in a range of 13mm to 30mm.

3. The low frequency sound absorbing device of claim 1, wherein the sound-transmitting holes are regular hexagonal holes, and the sound-transmitting holes are arranged at intervals in the transverse direction and the vertical direction to form an array structure.

4. The low frequency sound absorbing apparatus according to claim 1, wherein the sound-transmitting cloth layer is one of a cotton cloth, a chemical fiber cloth, a blended cloth, a metal fiber cloth, or a non-woven cloth having a sound transmission rate of not less than 90%.

5. The low frequency sound absorbing device according to claim 1, wherein the sound absorbing cotton layer has a thickness ranging from 20mm to 40mm, and a density ranging from 45k to 55k.

6. The low frequency sound absorbing apparatus according to claim 1, wherein the resonator layer has a plurality of resonant cavities, and the resonant cavities are arranged in a lateral direction and a vertical direction to form an array structure.

7. The low frequency sound absorbing apparatus according to claim 6, wherein two first resonant cavities of the resonator layer are first resonant cavities, two second resonant cavities of the resonator layer are second resonant cavities, and the remaining resonant cavities are third resonant cavities, wherein the radial areas of the first resonant cavities, the second resonant cavities, and the third resonant cavities become smaller in sequence.

8. The low frequency sound absorbing device according to any one of claims 1 to 7, further comprising a housing having a receiving groove with an open top, wherein the sound transmitting sheet layer, the sound absorbing cotton layer, the sound absorbing black paper layer, and the resonator layer are stacked in the receiving groove, the sound transmitting cloth layer covers the open end of the housing, and a gap is formed between the sound transmitting cloth layer and the sound transmitting sheet layer.

9. The low frequency sound absorbing apparatus of claim 8, wherein the housing comprises a bottom plate, a connecting plate, and four side plates; four the curb plate vertical set up in the bottom plate, and four the curb plate with the bottom plate encloses to close and forms the holding tank, the connecting plate is the loop configuration, the connecting plate set up in the curb plate is kept away from the one end of bottom plate, the sound-transmitting cloth layer lid fits on the connecting plate, and sound-transmitting cloth layer court one side of connecting plate is folded and is pressed from both sides and locate position between connecting plate and the curb plate.

10. The low frequency sound absorbing apparatus according to claim 8, wherein the casing has a plurality of through holes communicating with the resonator layer along a circumferential direction thereof, corresponding to the side wall of the resonator layer, and each of the through holes is covered with a cover.