阅读说明：本技术 一种可变辐射角长号弱音器 (Variable radiation angle trombone mute ) 是由 韩明博 于 2021-07-05 设计创作，主要内容包括：本发明涉及一种可变辐射角长号弱音器,该弱音器的窄指向性声波导管(2)是由若干梯形管(3)呈辐射状叠加固定而成的,窄辐射角窄指向性声波导管(2)的一端是小矩形端口为波导管进口(4),另一端是大矩形端口为波导管出口(5),窄指向性声波导管(2)与壳体(1)之间设有吸声棉(6),壳体1腔内设置环保吸声棉,形成迷宫式音道,使壳体1成为消声器壳体,波导管进口(4)与壳体(1)之间为开放式的消声通道进口(7),壳体(1)的弱音器进口端(10)外部设有弹性固定架(9)。本发明解决了无法在一场演出中随时调整装有弱音器的长号音量和辐射角度的问题,明显提升了长号的远程声音传输能力和穿透力。(The invention relates to a horn-variable trombone mute, a narrow directive sound wave guide pipe (2) of the mute is formed by radially superposing and fixing a plurality of trapezoidal pipes (3), one end of the narrow directive sound wave guide pipe (2) with a narrow radiation angle is a small rectangular port and is a waveguide inlet (4), the other end of the narrow directive sound wave guide pipe is a large rectangular port and is a waveguide outlet (5), sound absorption cotton (6) is arranged between the narrow directive sound wave guide pipe (2) and a shell (1), environment-friendly sound absorption cotton is arranged in a cavity of the shell (1) to form a labyrinth sound channel, so that the shell (1) becomes a silencer shell, an open type sound absorption channel inlet (7) is arranged between the waveguide inlet (4) and the shell (1), and an elastic fixing frame (9) is arranged outside a mute inlet end (10) of the shell (1). The invention solves the problem that the volume and the radiation angle of the trombone provided with the mute can not be adjusted at any time in one performance, and obviously improves the remote sound transmission capability and the penetrating power of the trombone.)

1. A variable radiation angle trombone mute, comprising a housing (1), characterized in that: casing (1) is calabash form, and one end is little circular shape mute entrance point (10), and the other end is big circular shape mute exit end (11), sets up narrow directive property acoustic duct (2) in casing (1), narrow directive property acoustic duct (2) are fixed by a plurality of trapezoidal pipes (3) are radial stack, and the one end of narrow directive property acoustic duct (2) of narrow radiation angle is little rectangle port and is waveguide tube import (4), and the other end is big rectangle port and is waveguide tube export (5), is equipped with environmental protection sound absorption cotton (6) between narrow directive property acoustic duct (2) and casing (1), sets up environmental protection sound absorption cotton in casing 1 intracavity, forms labyrinth sound channel, makes casing 1 become the silencer casing, is open noise elimination passageway import (7) between waveguide tube import (4) and casing (1), is equipped with baffle (8) in the outside of waveguide tube export (5), the outer side of the baffle (8) is matched with the inner side of the shell (1) and is sealed and fixed together, and an elastic fixing frame (9) is arranged outside the inlet end (10) of the mute of the shell (1).

2. The variable radiation angle trombone mute as set forth in claim 1, wherein: the trapezoidal pipe (3) adopt metal trapezoidal pipe or plastics trapezoidal pipe, the number of trapezoidal pipe (3) is 4 ~ 6.

3. The variable radiation angle trombone mute as set forth in claim 1, wherein: the large end face of the trapezoid pipe (3) is spherical, the narrow radiation angle a between two wide sides of the trapezoid pipe is 4-6 degrees, and the narrow directivity sound wave guide pipe wide radiation angle beta between the two narrow sides of the trapezoid pipe is 10-20 degrees.

4. The variable radiation angle trombone mute as set forth in claim 1, wherein: the elastic fixing frame (9) is made of cork or rubber materials, the elastic fixing frame (9) is rectangular, and the number of the elastic fixing frame (9) is not less than four, and the elastic fixing frame is radially and uniformly bonded outside the inlet end (10) of the mute of the shell body 1.

Technical Field

The invention belongs to the technical field of musical instrument equipment, and particularly relates to a horn mute with a variable radiation angle.

Background

The trombone mute is a device placed in the trombone bell mouth. The use of a mute can block the vibrating air flow to change the timbre and loudness of the instrument.

Trombone mutes are roughly divided into several categories:

1. 'Wa' sound mute, after using, the sound of trombone will become weaker, narrower, similar to 'Waer' sound. In general, jazz is used more.

2. The straight-line type mute is a metal mute, and the played sound has a sharp metal effect.

The existing long-range mute technology has a common defect, the adopted mute can not adjust the volume and the radiation angle at any time in one performance, and the remote sound transmission capability and the penetrating power after the mute is used are not ideal.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the utility model provides a variable radiation angle trombone mute, solves prior art and can't adjust the problem of volume and radiation angle at any time in a performance, promotes the long-range sound transmission ability and the penetrating power of using the mute back trombone. In order to achieve the purpose, the technical scheme adopted by the invention is as follows: the utility model provides a variable radiation angle trombone mute, includes the casing, its characterized in that: the casing is calabash-shaped, and one end is little circular shape mute entrance point, and the other end is big circular shape mute exit end, sets up the acoustic wave pipe of narrow directive property in the casing, the acoustic wave pipe of narrow directive property is that a plurality of trapezoidal pipes are fixed by radial stack, the number of trapezoidal pipe is 4 ~ 6, the trapezoidal pipe adopts metal trapezoidal pipe or plastics trapezoidal pipe, the big terminal surface of trapezoidal pipe is the sphere, the narrow radiation angle a between the two broadsides of trapezoidal pipe is 4 ~ 6 degrees, the wide radiation angle beta between the two broadsides of trapezoidal pipe is 10 ~ 20 degrees, the one end of narrow directive property acoustic wave pipe is that little rectangle port is the waveguide pipe import, the other end is that big rectangle port is the waveguide pipe export, be equipped with the environmental protection sound absorption cotton between narrow directive property acoustic wave pipe and the casing, set up the environmental protection sound absorption cotton in the casing intracavity, form labyrinth sound track, make the casing become the silencer casing, be open noise elimination passageway import between waveguide pipe import and the casing, the outer side of the waveguide tube outlet is provided with a baffle, the outer side of the baffle is matched with the inner side of the shell and is fixedly sealed, an elastic fixing frame is arranged outside the inlet end of the mute of the shell and is made of cork wood or rubber materials, the elastic fixing frame is rectangular, the number of the elastic fixing frames is not less than four, the elastic fixing frames are radially and uniformly bonded outside the inlet end of the mute of the shell and can be firmly inserted into a horn mouth of a trombone for fixing, the thickness of a rectangular elastic substance strip determines a leakage airflow gap between the shell and the trombone, the difference of the leakage airflow gaps determines the noise elimination performance and the basic tone of the invention, and the rectangular elastic substance strips with different thicknesses can be selected according to different playing characteristics.

When the invention is used, the sound directivity can be conveniently controlled by only adjusting the angle embedded into the trombone bell mouth, different playing effects can be obtained in the recording and performance occasions with different requirements, and if the alpha angle direction of the variable radiation angle mute is set to be the horizontal direction during playing, the sound pointing to the back field of the audience area can obtain longer transmission distance and far field sound brightness and penetrating power under the condition of low volume.

The outer part of the end with the smaller diameter of the shell can be firmly inserted into the trombone bellmouth for fixing, the thickness of the mute elastic fixing frame determines the air flow gap between the silencer shell and the trombone bellmouth, the difference of the air flow gap determines the silencing performance and the basic tone of the invention, and rectangular elastic material strips with different thicknesses can be selected according to different playing characteristics.

The narrow directive property sound wave guide pipe is fixed in the shell, one end of the narrow directive property sound wave guide pipe is of a small rectangular structure, the other end of the narrow directive property sound wave guide pipe is of a large rectangular structure, the large rectangle is in sealing connection with the shell through a baffle plate connected with a circular disc, the narrow directive property sound wave guide pipe is made of hard materials (metal or hard plastics), the narrow directive property sound wave guide pipe cuts airflow entering from the small rectangular structure end into a plurality of wave beams with the same frequency and the same phase, a plurality of independent wave beams are formed in the cavities, and independent narrow band sound wave beams are formed at the outlet of the large rectangular structure end according to the diffusion angle of the wave guide pipe. At the exit of the narrow directional acoustic waveguide, these independent, frequency and phase coincident acoustic beams interfere and squeeze each other, forming a linear array beam with a narrower radiation angle, and forming a significant difference in radiation angles in the α and β directions.

Furthermore, the shell is made of hard materials (metal or hard plastics), environment-friendly sound absorption cotton is arranged in the cavity of the shell to form a labyrinth sound channel, and different sound absorption quantities can be obtained by adjusting the density and the quality of the environment-friendly sound absorption cotton. After the energy of sound enters the shell from the trombone horn mouth, one part of the sound enters the labyrinth sound absorption cavity through the inlet of the sound absorption channel to be absorbed and converted into heat energy, and the other part of the sound enters the narrow directive sound wave guide pipe through the inlet of the waveguide pipe and forms linear array wave beams with narrower radiation angles at the outlet.

The invention has the following beneficial effects:

the invention has simple structure, scientific and reasonable design and convenient use, solves the problem that the volume and the radiation angle of the trombone provided with the mute can not be adjusted at any time in one performance in the prior art, and can obviously improve the remote sound transmission capability and the penetrating power of the trombone after the mute is used.

The silencer shell is made of hard materials (metal or hard plastics), a labyrinth sound-absorbing cavity and internal environment-friendly sound-absorbing cotton are arranged in the silencer shell, and the sound-absorbing quantity of the horn trombone mute can be changed by selecting the density and the mass of the internal environment-friendly sound-absorbing cotton.

The narrow directional sound wave guide tube fixed in the silencer shell is provided with more than 3 horn-shaped directional sound wave guide tubes used for diffusing sound outwards, the radiation angles of the sound waves at the outlet of the directional sound wave guide tubes are respectively alpha and beta, and the radiation angles of the directional sound waves can be changed by rotating the angle of the narrow directional sound wave guide tube inserted into a horn mouth of a horn, so that the problem of remote sound transmission capability and penetrating power after a horn is additionally arranged is effectively solved.

The mute fixing frame is composed of at least four rectangular elastic substance strips with the same structure, is uniformly adhered to the outer part of the smaller-diameter end of the silencer shell in a radial shape, can be firmly inserted into the horn mouth of the trombone for fixing, and can adjust the radiation angle of a sound field by rotating the insertion angle of the silencer shell. The air gap of the bell mouth can be changed by adjusting the thickness of the mute fixing frame, thereby adjusting the tone and the sound absorption quantity.

Drawings

FIG. 1 is a front view of a schematic of the structure of the present invention;

FIG. 2 is a left side view of the schematic of FIG. 1;

FIG. 3 is a right side view of the schematic of FIG. 1;

FIG. 4 is a front view of a schematic of a waveguide structure according to the present invention;

FIG. 5 is a left side view of the schematic of FIG. 4;

FIG. 6 is a right side view of the schematic of FIG. 4;

FIG. 7 is a top view of the schematic of FIG. 4;

fig. 8 is a schematic structural view of the housing of the present invention.

In the figure, 1, a shell, 2, a narrow directive sound wave guide pipe, 3, a trapezoid pipe, 4, a waveguide pipe inlet, 5, a waveguide pipe outlet, 6, environment-friendly sound absorption cotton, 7, a sound elimination channel inlet, 8, a baffle, 9, an elastic fixing frame, 10, a mute inlet end, 11, a mute outlet end, a narrow radiation angle between two wide sides of the trapezoid pipe, and beta, a wide radiation angle between two narrow sides of the trapezoid pipe.

Detailed Description

The present invention will be further described with reference to the following description of the drawings, which are not intended to limit the scope of the present invention.

A variable radiation angle trombone mute, includes casing 1, its characterized in that: the casing 1 is calabash, and one end is little circular shape mute entrance point 10, and the other end is big circular shape mute exit end 11, sets up narrow directive property sound wave pipe 2 in the casing 1, narrow directive property sound wave pipe 2 is by a plurality of trapezoidal pipes 3 be radial stack fixed and form, the number of trapezoidal pipe 3 is 4 ~ 6, and trapezoidal pipe 3 adopts metal trapezoidal pipe or plastics trapezoidal pipe, and the big terminal surface of trapezoidal pipe 3 is the sphere form, and the narrow radiation angle a between the two broadsides of trapezoidal pipe is 4 ~ 6 degrees, and the wide radiation angle beta between the two broadsides of trapezoidal pipe is 10 ~ 20 degrees, and the one end of narrow directive property sound wave pipe 2 is that little rectangle port is waveguide tube import 4, and the other end is that big rectangle port is waveguide tube export 5, is equipped with environmental protection sound absorption cotton 6 between narrow directive property sound wave pipe 2 and the casing 1, sets up environmental protection sound absorption cotton in the casing 1 intracavity, forms labyrinth sound channel, the shell 1 is made into a silencer shell, an open silencing channel inlet 7 is arranged between the waveguide tube inlet 4 and the shell 1, a baffle plate 8 is arranged at the outer side of the waveguide tube outlet 5, the outer side of the baffle plate 8 is inosculated with the inner side of the shell 1 and is fixed together in a sealing way, the outer part of the inlet end 10 of the mute of the shell 1 is provided with an elastic fixing frame 9, the elastic fixing frame 9 is made of cork wood or rubber materials, the elastic fixing frame 9 is rectangular, the number of the elastic fixing frames 9 is not less than four, the elastic fixing frames are radially and uniformly adhered to the outer part of the inlet end 10 of the mute of the shell 1 and can be firmly inserted into a horn mouth of a trombone for fixing, the thickness of a rectangular elastic substance strip determines a leakage airflow gap between the shell 1 and the horn mouth of the trombone, the difference of the leakage airflow gap determines the noise elimination performance and the basic tone color of the invention, and the rectangular elastic substance strips with different thicknesses can be selected according to different playing characteristics.

The working process of the invention is as follows:

the narrow directional sound wave guide tube 2 is fixed in the shell 1, one end of the narrow directional sound wave guide tube is of a small rectangular structure, the other end of the narrow directional sound wave guide tube is of a large rectangular structure and is made of hard metal or hard plastic materials, the narrow directional sound wave guide tube 2 cuts airflow entering from a waveguide tube inlet 4 of the small rectangular structure into a plurality of beams with the same frequency and the same phase, a plurality of independent sound conduction are formed in the cavities, and independent narrow-band sound wave beams are formed according to diffusion angles (alpha and beta) of the waveguide tubes. At the waveguide exit 5 of the narrow directional acoustic waveguide 2, these independent sound beams with the same frequency and phase interfere and squeeze each other, forming a linear array beam with a narrower radiation angle, and the radiation angles in the α and β directions have a significant difference. The shell 1 is made of metal or hard plastic hard materials, environment-friendly sound absorption cotton is arranged in the shell, and different sound absorption quantities can be obtained by adjusting the density and the quality of the internal environment-friendly sound absorption cotton. After sound energy enters the labyrinth shell 1 from the trombone horn mouth, a part of the sound enters the labyrinth sound channel sound absorption cavity through the sound attenuation channel inlet 7 to be absorbed and converted into heat energy, and the other part of the sound enters the narrow directive sound wave guide pipe 2 through the waveguide pipe inlet 4 and forms linear array wave beams with narrower radiation angles at the waveguide pipe outlet 5 of the large port. So as to achieve the effect of mute.

The above-mentioned embodiment is only one of the preferred embodiments of the present invention, and should not be used to limit the scope of the present invention, and all the insubstantial modifications or changes made within the spirit and scope of the main design of the present invention, which still solve the technical problems consistent with the present invention, should be included in the scope of the present invention.