Conical 3D acoustic diffuser

Abstract

The present invention discloses a conical three-dimensional acoustic diffuser, comprising a circular bottom plate, fins, grooves and reinforcing plates. The fins are installed on the circular bottom plate to form annular fins with the center of the circular bottom plate as the center of the circle, and multiple annular fins form multiple annular grooves with the center of the circular bottom plate as the center of the circle, and the center is a circular tubular reflector; the height of the multiple annular fins is low outside and high inside, and the intervals between the multiple annular fins are narrow outside and wide inside; the fins have uniform thickness, and a semicircular reflector is arranged on the top. The reinforcing plate includes reinforcing plates arranged perpendicularly to each other outside the circular tubular shape with the center point and reinforcing plates arranged perpendicularly with the center of the circle as the symmetry center in the edge area with a larger span. Efficient three-dimensional uniform diffusion of sound waves is formed indoors, forming an effective diffused sound field. It is suitable for recording studios, theaters, concert halls, hotel karaoke bars, home theaters and other places.

Description

Technical Field

[0001] The invention relates to the field of architectural acoustics, and in particular to a conical three-dimensional acoustic diffuser. Background Art

[0002] The sound reflects back and forth between the walls and forms standing waves, which leads to a long reverberation time and turbid sound. In the case of pure tone or narrowband noise power testing, the low-frequency band cannot be diffused because too few vibration reduction vibration modes are excited. In addition, in the environment of building materials with high absorption coefficients, the absorption within a certain range is particularly strong, making the diffusion of indoor sound field very poor. Therefore, in high-end indoor places such as opera houses, concert halls, recording studios, leisure clubs, etc. that require sound field diffusion, it is necessary to solve the secondary noise caused by the sound vibration, echo and resonance caused by the characteristics of the sound wave itself and the indoor wall.

[0003] The two-dimensional acoustic diffusers currently used have a diffusion direction related to the vertical direction of the grooves and convex grooves of the diffuser, basically forming a two-dimensional diffusion. When used on the interior walls, it can meet the indoor diffusion design requirements. However, when the diffuser is set on the indoor ceiling, the unidirectional diffuser forms a two-sided diffusion and produces uneven indoor sound field. Summary of the invention

[0004] In order to diffuse the sound field to make the sound soft and beautiful, and give people the feeling of being surrounded by music, a conical three-dimensional acoustic diffuser is provided to evenly diffuse the sound waves in three dimensions in the room, forming an effective diffused sound field and avoiding sound vibration and echo.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a conical three-dimensional acoustic diffuser, including a circular bottom plate, fins, grooves and a reinforcing plate. The fins are installed on the circular bottom plate to form a circular ring fin with the center of the circular bottom plate as the center of the circle, and multiple circular ring fins form multiple circular ring grooves with the center of the circular bottom plate as the center of the circle, and the center is a circular tubular reflector; the height of the multiple circular ring fins is low outside and high inside, and the interval between the multiple circular ring fins is narrow outside and wide inside; the thickness of the fins is uniform, and a semicircular reflector is set on the top. When the fin is circular and the top is semicircular, the sound waves incident on the top of the fin will scatter and diffuse in all directions.

[0006] The reinforcing plates include reinforcing plates arranged perpendicularly to each other outside the central circular tube and reinforcing plates arranged perpendicularly to the edge area with a larger span and the center of the circle as the symmetry center. A complete conical body is formed by reliable connection between the reinforcing plates, the circular bottom plate and the wing.

[0007] The spacing between the plurality of annular fins increases from 40 mm to the center at a ratio of 1.15 to 1.35, and the width of the groove increases from the edge to the center. The height of the plurality of annular fins increases from 40 mm to the center at a ratio of 1.20 to 1.50, and the depth of the groove increases from the edge to the center.

[0008] Compared with smooth reflective planes, conical three-dimensional acoustic diffusers can effectively avoid sound focusing. When sound waves are reflected by smooth walls, all sound energy will be reflected in the same direction, and the reflection direction is fixed, depending on the position of the sound source. When sound waves are reflected by the surface of a conical three-dimensional acoustic diffuser, the sound energy will be dispersed and reflected in different directions with different phase differences. The groove width is determined according to the highest diffusion frequency, and the maximum depth of the groove is determined according to the lowest scattering frequency. When the groove width is between 40 and 200 mm and the depth is between 40 and 500 mm, the conical three-dimensional acoustic diffuser evenly diffuses sound waves in all directions between the frequencies of 340 Hz and 4850 Hz.

[0009] The diameter of the circular base plate, the number of annular grooves, and the height of the center point of the fins are determined according to the installation site and diffusion requirements. The larger the diameter of the circular base plate, the more the number of annular grooves, the increasing ratio of the intervals between the groove fins tends to the lower limit (1.15), and the increasing ratio of the height tends to the lower limit (1.20). The smaller the diameter of the circular base plate, the fewer the number of annular grooves, the increasing ratio of the intervals between the groove fins tends to the upper limit (1.35), and the increasing ratio of the height tends to the upper limit (1.50). The higher the height of the center point of the fin, the lower the minimum scattering frequency.

[0010] The beneficial effect of the present invention is that the conical three-dimensional acoustic diffuser is specially designed for the diffusion of surround sound field, and the three-dimensional conical surface diffusion will produce a three-dimensional surround feeling. The conical three-dimensional acoustic diffuser is suitable for recording studios, theaters, concert halls, hotel karaoke halls, home theaters and other places. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0012] Figure 1 It is a top view of the structure of the present invention;

[0013] Figure 2 It is a side view of the structure of the present invention;

[0014] In the figure, 1. circular bottom plate, 2. wing, 3. groove, 4. reinforcing plate, 5. circular tube, 6. semicircle. DETAILED DESCRIPTION

[0015] exist Figure 1 , 2 In the embodiment shown, a 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 mounted on the circular base plate (1) to form an annular fin (2) with the center of the circular base plate (1) as the center of the circle, and a plurality of annular fins (2) form a plurality of annular grooves (3) with the center of the circular base plate (1) as the center of the circle, with a circular tube (5) reflector at the center; the height of the plurality of annular fins (2) is low outside and high inside, and the intervals between the plurality of annular fins (2) are narrow outside and wide inside; the thickness of the fins (2) is uniform, and a semicircular (6) reflector is arranged on the top. The reinforcing plate (6) comprises reinforcing plates (6) arranged perpendicularly to each other outside the circular tube (5) with the center point, and reinforcing plates (6) arranged perpendicularly with the center of the circle as the symmetric center in the edge area with a larger span.

[0016] The spacing between the plurality of annular fins (2) increases from 40 mm from the edge to the center at a ratio of 1.15 to 1.35, and the width of the groove (3) increases from the edge to the center. The height of the plurality of annular fins (2) increases from 40 mm from the edge to the center at a ratio of 1.20 to 1.50, and the depth of the groove (3) increases from the edge to the center.

[0017] The diameter of the circular base plate (1), the number of the annular grooves (3), and the height of the center point of the wing (1) are determined according to the installation site and diffusion requirements.

[0018] It should be understood that various changes may be made to the above embodiments without departing from the scope of the present invention. Any modification, equivalent substitution and improvement made within the spirit and principle of the present utility model shall be included in the protection scope of the present invention.

Claims

1. A conical three-dimensional acoustic diffuser, comprising a circular bottom plate, fins, grooves and a reinforcement plate, characterized in that: The wing is installed on the circular base plate to form an annular wing with the center of the circular base plate as the center of the circle. Multiple annular wing sheets form multiple annular grooves with the center of the circular base plate as the center of the circle, and the center is a circular tubular reflector; the height of the multiple annular wing sheets is low on the outside and high on the inside, and the intervals between the multiple annular wing sheets are narrow on the outside and wide on the inside; the thickness of the wing sheets is uniform, and a semicircular reflector is arranged on the top.

2. The conical three-dimensional acoustic diffuser according to claim 1, characterized in that: The reinforcing plates include reinforcing plates arranged perpendicularly to each other outside the circular tube with the center point and reinforcing plates arranged perpendicularly to the edge area with a larger span with the center of the circle as the symmetry center.

3. The conical three-dimensional acoustic diffuser according to claim 1, characterized in that: The heights of the plurality of annular fins increase successively from 40 mm from the edge to the center at a ratio of 1.20 to 1.50, and the depths of the grooves increase successively from the edge to the center.

4. The conical three-dimensional acoustic diffuser according to claim 1, characterized in that: The intervals between the multiple annular fins are gradually widened from 40 mm to the center at a ratio of 1.15 to 1.35, and the width of the groove is gradually widened from the edge to the center.

5. The conical three-dimensional acoustic diffuser according to claim 1, characterized in that: The diameter of the circular bottom plate, the number of annular grooves, and the height of the center point of the wing are determined according to the installation site and diffusion requirements.

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