CN111005465A - Conical three-dimensional acoustic diffuser - Google Patents
Conical three-dimensional acoustic diffuser Download PDFInfo
- Publication number
- CN111005465A CN111005465A CN201811576732.XA CN201811576732A CN111005465A CN 111005465 A CN111005465 A CN 111005465A CN 201811576732 A CN201811576732 A CN 201811576732A CN 111005465 A CN111005465 A CN 111005465A
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- circular
- fins
- center
- reinforcing plate
- shaped
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- 230000003014 reinforcing effect Effects 0.000 claims abstract description 25
- 238000009792 diffusion process Methods 0.000 claims abstract description 13
- 238000009434 installation Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
- E04B1/84—Sound-absorbing elements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
- E04B1/84—Sound-absorbing elements
- E04B2001/8423—Tray or frame type panels or blocks, with or without acoustical filling
- E04B2001/8442—Tray type elements
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- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
Abstract
The invention discloses a conical three-dimensional acoustic diffuser, which comprises a circular bottom plate, fins, grooves and a reinforcing plate. The fins are arranged on the circular bottom plate to form circular ring-shaped fins taking the center of the circular bottom plate as the circle center, the circular ring-shaped fins form a plurality of circular ring-shaped grooves taking the center of the circular bottom plate as the circle center, and the center of each circular ring-shaped fin is a circular tube-shaped reflector; the heights of the circular ring-shaped fins are low outside and high inside, and the intervals among the circular ring-shaped fins are narrow outside and wide inside; the fins are uniform in thickness, and a semicircular reflector is arranged at the top of each fin. The reinforcing plate comprises a central point circular tube shape reinforcing plate and a reinforcing plate, wherein the central point circular tube shape reinforcing plate is vertically arranged outside the central point circular tube shape reinforcing plate, and the reinforcing plate is vertically arranged between the edge area with larger span and the circle center. The efficient three-dimensional uniform diffusion sound wave is formed indoors, and an effective diffusion sound field is formed. The method is suitable for places such as recording halls, movie theaters, music halls, hotel song halls, home theaters and the like.
Description
Technical Field
The invention relates to the field of architectural acoustics, in particular to a conical three-dimensional acoustic diffuser.
Background
The sound is reflected and superposed back and forth between walls to form standing waves, so that the reverberation time is too long, and the sound is turbid. Under the test condition of pure tone or narrow-band noise power, the residual low frequency band cannot be diffused because the excited vibration damping mode is too few. In addition, in the environment of a building material having a high sound absorption coefficient, since sound absorption is particularly strong in a certain range, the indoor sound field is poorly diffused. Therefore, in high-end rooms such as opera houses, concert halls, recording studios, leisure facilities, etc., where sound field dispersion is required, secondary noise due to sound vibration, echo, and resonance caused by the characteristics of sound waves and indoor wall surfaces needs to be solved.
The two-dimensional acoustic diffuser that uses at present, diffusion direction and diffuser's recess are relevant with the vertical direction of tongue, form two-dimensional diffusion basically, use can satisfy indoor diffusion design requirement on the inner wall, but, when the diffuser setting was at indoor furred ceiling, the non-uniformity of indoor sound field is produced in the diffusion of unilateral diffuser formation two sides.
Disclosure of Invention
The sound is made soft and graceful for the diffuse sound field and gives a feeling of being surrounded by music. The conical three-dimensional acoustic diffuser is provided, acoustic waves are uniformly diffused in a three-dimensional mode indoors, an effective diffused sound field is formed, and sound vibration and echo are avoided.
The technical scheme adopted by the invention for solving the technical problems is as follows: a conical three-dimensional acoustic diffuser comprises a circular base plate, fins, grooves and a reinforcing plate. The fins are arranged on the circular bottom plate to form circular ring-shaped fins taking the center of the circular bottom plate as the circle center, the circular ring-shaped fins form a plurality of circular ring-shaped grooves taking the center of the circular bottom plate as the circle center, and the center of each circular ring-shaped fin is a circular tube-shaped reflector; the heights of the circular ring-shaped fins are low outside and high inside, and the intervals among the circular ring-shaped fins are narrow outside and wide inside; the fins are uniform in thickness, and a semicircular reflector is arranged at the top of each fin. When the fins are circular and the top is semicircular, sound waves incident to the tops of the fins are scattered to be diffused in all directions.
The reinforcing plate comprises a reinforcing plate and a reinforcing plate, wherein the reinforcing plate is arranged in a central point circular tube shape and is perpendicular to the outer side of the central point circular tube shape, and the reinforcing plate is arranged in a larger span edge area and is perpendicular to the center of the circular tube. The complete conical body is formed by the reliable connection among the reinforcing plate, the circular bottom plate and the fins.
The interval between the plurality of circular ring-shaped fins is gradually widened from the edge to the center according to the proportion of 1.15-1.35 from 40mm, and the width of the groove is gradually widened from the edge to the center. The heights of the circular ring-shaped fins are gradually increased from 40mm from the edge to the center according to the proportion of 1.20-1.50, and the depth of the groove is gradually increased from the edge to the center.
Compared with a smooth reflecting plane, the conical three-dimensional acoustic diffuser can effectively avoid acoustic focusing. When the sound waves are reflected by the smooth wall surface, all the sound energy is reflected along the same direction, and the reflection direction is fixed and depends on the position of the sound source. When the sound wave is reflected by the surface of the conical three-dimensional acoustic diffuser, the sound energy is scattered and reflected to different directions and has different phase differences. The width of the groove is determined according to the highest diffusion frequency, and the maximum depth of the groove is determined according to the lowest diffusion frequency. When the width of the groove is 40-200 mm and the depth is 40-500 mm, the conical three-dimensional acoustic diffuser diffuses the sound waves to all directions in a diffuse reflection mode uniformly between the frequencies of 340 Hz-4850 Hz.
The diameter of the circular bottom plate, the number of the circular grooves and the height of the central point of the fin are determined according to the installation site and the diffusion requirement. The larger the diameter of the circular bottom plate is, the more the number of the circular grooves is, the increasing proportion of the intervals among the fins of the grooves tends to lower limit (1.15), and the increasing proportion of the heights tends to lower limit (1.20). The smaller the diameter of the circular bottom plate is, the fewer the number of the circular grooves is, the increasing proportion of the intervals among the fins of the grooves tends to the upper limit (1.35), and the increasing proportion of the heights tends to the upper limit (1.50). The higher the height of the airfoil center point, the lower the lowest scattering frequency.
The invention has the advantages that the conical three-dimensional acoustic diffuser is specially designed for diffusion of a surrounding sound field, and the three-dimensional conical surface diffusion can generate surrounding sense of three-dimensional stereo. The conical three-dimensional acoustic diffuser is suitable for places such as recording halls, movie theaters, music halls, hotel singing halls, home theaters and the like.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a top configuration view of the present invention.
Fig. 2 is a side view of the present invention.
In the figure, 1, a circular bottom plate, 2, fins, 3, grooves, 4, reinforcing plates, 5, a circular tube shape and 6, a semicircle are arranged.
Detailed Description
In the embodiment shown in fig. 1 and 2, the conical three-dimensional acoustic diffuser comprises a circular base plate (1), fins (2), grooves (3) and a cross-shaped reinforcing plate (4). The fins (2) are arranged on the circular base plate (1) to form circular ring-shaped fins (2) taking the center of the circular base plate (1) as the center of a circle, the circular ring-shaped fins (2) form a plurality of circular ring-shaped grooves (3) taking the center of the circular base plate (1) as the center of a circle, and the center is a circular tube-shaped (5) reflector; the heights of the circular ring-shaped fins (2) are lower outside and higher inside, and the intervals among the circular ring-shaped fins (2) are narrow outside and wide inside; the thickness of the fins (2) is uniform, and a semicircular reflector (6) is arranged at the top of the fins. The reinforcing plate (4) comprises a reinforcing plate (4) which is arranged outside a central point circular tube (5) in a mutually vertical mode and a reinforcing plate (4) which is arranged in a mode that the edge area with larger span is vertical to the circle center.
The intervals among the plurality of circular ring-shaped fins (2) are gradually widened from the edge to the center according to the proportion of 1.15-1.35 from 40mm, and the width of the groove (3) is gradually widened from the edge to the center. The heights of the circular ring-shaped fins (2) are gradually increased from 40mm from the edge to the center according to the proportion of 1.20-1.50, and the depth of the groove (3) is gradually increased from the edge to the center.
The diameter of the circular bottom plate (1), the number of the circular grooves (3) and the height of the central point of the fin (2) are determined according to the installation site and the diffusion requirement.
It will be appreciated that many variations may be made to the above-described embodiments without departing from the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A conical three-dimensional acoustic diffuser comprises a circular bottom plate, fins, grooves and a reinforcing plate, and is characterized in that: the fins are arranged on the circular bottom plate to form circular ring-shaped fins taking the center of the circular bottom plate as the circle center, the circular ring-shaped fins form a plurality of circular ring-shaped grooves taking the center of the circular bottom plate as the circle center, and the center of each circular ring-shaped fin is a circular tube-shaped reflector; the heights of the circular ring-shaped fins are low outside and high inside, and the intervals among the circular ring-shaped fins are narrow outside and wide inside; the fins are uniform in thickness, and a semicircular reflector is arranged at the top of each fin.
2. The conical three-dimensional acoustic diffuser of claim 1, wherein: the reinforcing plate comprises a reinforcing plate and a reinforcing plate, wherein the reinforcing plate is arranged in a central point circular tube shape and is perpendicular to the outer side of the central point circular tube shape, and the reinforcing plate is arranged in a larger span edge area and is perpendicular to the center of the circular tube.
3. The conical three-dimensional acoustic diffuser of claim 1, wherein: the heights of the circular ring-shaped fins are gradually increased from 40mm from the edge to the center according to the proportion of 1.20-1.50, and the depth of the groove is gradually increased from the edge to the center.
4. The conical three-dimensional acoustic diffuser of claim 1, wherein: the interval between the plurality of circular ring-shaped fins is gradually widened from the edge to the center according to the proportion of 1.15-1.35 from 40mm, and the width of the groove is gradually widened from the edge to the center.
5. The conical three-dimensional acoustic diffuser of claim 1, wherein: the diameter of the circular bottom plate, the number of the circular grooves and the height of the central point of the fin are determined according to the installation site and the diffusion requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811576732.XA CN111005465A (en) | 2018-12-23 | 2018-12-23 | Conical three-dimensional acoustic diffuser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811576732.XA CN111005465A (en) | 2018-12-23 | 2018-12-23 | Conical three-dimensional acoustic diffuser |
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| Publication Number | Publication Date |
|---|---|
| CN111005465A true CN111005465A (en) | 2020-04-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811576732.XA Pending CN111005465A (en) | 2018-12-23 | 2018-12-23 | Conical three-dimensional acoustic diffuser |
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| Country | Link |
|---|---|
| CN (1) | CN111005465A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113187119A (en) * | 2021-04-27 | 2021-07-30 | 哈尔滨工业大学 | Xibingshi triangular acoustic diffuser and arrangement method |
-
2018
- 2018-12-23 CN CN201811576732.XA patent/CN111005465A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113187119A (en) * | 2021-04-27 | 2021-07-30 | 哈尔滨工业大学 | Xibingshi triangular acoustic diffuser and arrangement method |
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