Linear sound source waveguide horn
By designing a linear sound source waveguide horn separated into two half-conical cavity, the phase coupling of frequency division points can be achieved without electronic frequency division, which solves the problem of limited frequency response range in the prior art and the need to add cone basin units. , improves frequency response range and mid-frequency clarity.
Patent Information
- Application Number
- CN202420991841.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-09
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-05-09
AI Technical Summary
The existing linear sound source waveguide horn has a problem of limited frequency response range in medium and high frequency audio drivers. It is necessary to add a cone unit to make up for the shortage of low frequency, and electronic frequency division is required to achieve phase correction near the frequency division point.
Design a linear sound source waveguide horn, whose inner cavity is separated into two half-conical cavity in different directions. By setting two unit mounting ports on the shell, the intermediate frequency and high frequency sounding units are installed respectively, and the sound source passes through two and a half The time when the cone cavity reaches the sound source outlet is the same, achieving better phase coupling of frequency division points without electronic division.
One amplifier channel can drive the two units of the intermediate frequency and high frequency, expand the frequency response range of the horn, reduce the lower frequency limit, eliminate the need for a cone unit, and improve the medium and high frequency sound pressure margin and the mid-frequency clarity.
Smart Images
Figure CN222531826U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of horn structures, in particular to a line sound source waveguide horn. Background Art
[0002] The traditional line source waveguide horns on the market (i.e. the mid-high frequency waveguide horns used in line array speakers) are all single compression drive speaker unit horns, which can only install one sound unit. (There are applications in the market where multiple waveguide structures are combined into a horn assembly in the vertical direction, and each waveguide structure corresponds to an identical unit. In essence, this situation is still a vertical linear arrangement of multiple single cavity horns.) The frequency response range of any mid-high frequency speaker unit is always limited (large diaphragm high frequency response is poor, and small diaphragm low frequency response is poor.), and in the development and production process of line array speakers, in order to make up for the insufficient low frequency lower limit of the mid-high frequency unit, according to the requirements of the line sound source coupling characteristics, generally one or more cone units are always added to meet the mid-frequency sound reproduction requirements. The three-way line array speakers on the current market are all such solutions. At the same time, in order to improve the sound quality, the mid-frequency and high frequency frequency division method usually adopts active frequency division (i.e. the front end of the power amplifier uses electronic frequency division), so it is also necessary to use 2 power amplifier channels to achieve phase correction near the crossover point.
[0003] Therefore, we need a more optimized line sound source waveguide horn to solve the problems existing in the existing technology. Utility Model Content
[0004] The utility model aims to provide a line sound source waveguide horn, which can achieve better phase coupling of the frequency division point without using electronic frequency division (using power frequency division), and one power amplifier channel can drive both the intermediate frequency unit and the high frequency unit.
[0005] The utility model is realized by the following technical solutions:
[0006] A line sound source waveguide horn comprises a shell; wherein: a sound source outlet with a gradually expanding diameter is arranged at the top of the shell; the inner cavity of the shell is divided into a first semi-conical cavity and a second semi-conical cavity in two different directions; a first unit installation port is arranged at one end of the first semi-conical cavity with a gradually decreasing diameter; a second unit installation port is arranged at one end of the second semi-conical cavity with a gradually decreasing diameter; a medium frequency sounding unit or a high frequency sounding unit is installed on the first unit installation port; a high frequency sounding unit or a medium frequency sounding unit is installed on the second unit installation port; the time for the sound source to reach the sound source outlet after being emitted from the medium frequency sounding unit or the high frequency sounding unit through the first semi-conical cavity is the same as the time for the sound source to reach the sound source outlet after being emitted from the medium frequency sounding unit or the high frequency sounding unit through the second semi-conical cavity; the sound waves emitted by the medium frequency sounding unit or the high frequency sounding unit are coupled in the inner cavity of the shell and reach the sound source outlet and radiate to the far field.
[0007] As a further improvement of the technical solution of the utility model, the outer shell is mainly composed of an upper wall of the cone cavity, a lower wall of the cone cavity, a left wall of the cone cavity and a right wall of the cone cavity; the upper wall of the cone cavity, the lower wall of the cone cavity, the left wall of the cone cavity and the right wall of the cone cavity overlap each other to form the first semi-conical cavity, the second semi-conical cavity and the sound source outlet.
[0008] As a further improvement of the technical solution of the utility model, a first diffusion portion is recessed inwardly at one end of the left wall of the cone cavity where the diameter gradually expands; a second diffusion portion is recessed inwardly at one end of the right wall of the cone cavity where the diameter gradually expands; the first diffusion portion and the second diffusion portion cooperate with the upper wall of the cone cavity and the lower wall of the cone cavity to form the sound source outlet.
[0009] As a further improvement of the technical solution of the utility model, the inner cavity of the shell is symmetrically divided into a first semi-conical cavity and a second semi-conical cavity.
[0010] As a further improvement of the technical solution of the utility model, the first semi-conical cavity and the second semi-conical cavity are both in the shape of a semi-cone as a whole.
[0011] As a further improvement of the technical solution of the utility model, the acoustic path distances from the first unit installation port and the second unit installation port to any position in the vertical direction of the horn outlet are the same.
[0012] As a further improvement of the technical solution of the utility model, a plurality of assembly holes are provided on the edges of the upper wall, the lower wall, the left wall and the right wall of the cone cavity.
[0013] In summary, the utility model has the following beneficial effects:
[0014] 1. By setting a first unit mounting port and a second unit mounting port on the housing, a high-frequency sound unit or an intermediate-frequency sound unit is installed on the first unit mounting port and the second unit mounting port respectively, better phase coupling of the crossover point can be achieved without using electronic crossover (using power crossover), and one power amplifier channel can drive both the intermediate-frequency and high-frequency units;
[0015] 2. One horn can be equipped with two compression drive units with different frequency response characteristics at the same time, one is a mid-frequency sound unit with a lower frequency response limit, and the other is a high-frequency sound unit with a higher frequency response limit, so that a frequency response with a wider frequency response range can be obtained near the outlet of a line sound source horn;
[0016] 3. The lower frequency limit of horn playback can be greatly reduced. Without the cone unit as the mid-frequency playback unit, the distance between the left and right low-frequency units can be made smaller during the design of the double-bass line array speaker, and the interference characteristics are closer to the requirements of the line sound source. Ultimately, the overall line array speaker system has a larger mid- and high-frequency sound pressure margin and better mid-frequency clarity. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a three-dimensional structural diagram of the overall structure of a line sound source waveguide horn according to an embodiment of the utility model;
[0018] Figure 2 It is a three-dimensional structural diagram of the explosion structure of a line sound source waveguide horn according to an embodiment of the utility model.
[0019] In the accompanying drawings: 1-housing; 2-assembly hole; 11-sound source outlet; 12-first half-cone cavity; 13-second half-cone cavity; 14-cone cavity upper wall; 15-cone cavity lower wall; 16-cone cavity left wall; 17-cone cavity right wall; 121-first unit installation port; 131-second unit installation port; 161-first diffuser; 171-second diffuser. DETAILED DESCRIPTION
[0020] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.
[0021] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, upper end, lower end, top, bottom...) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0022] In the present invention, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0023] In addition, in the present utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features; in addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.
[0024] The following is combined with Figure 1-2 The utility model is described in further detail.
[0025] like Figure 1 and Figure 2As shown, a line sound source waveguide horn comprises a shell 1; wherein: a sound source outlet 11 with a gradually increasing diameter is arranged on the top of the shell 1; the inner cavity of the shell 1 is divided into a first semi-conical cavity 12 and a second semi-conical cavity 13 in two different directions; a first unit mounting port 121 is arranged at one end of the first semi-conical cavity 12 with a gradually decreasing diameter; a second unit mounting port 131 is arranged at one end of the second semi-conical cavity 13 with a gradually decreasing diameter; a medium frequency sounding unit or a high frequency sounding unit is mounted on the first unit mounting port 121; a high frequency sounding unit or a medium frequency sounding unit is mounted on the second unit mounting port 131; the time when the sound source is emitted from the medium frequency sounding unit or the high frequency sounding unit and passes through the first semi-conical cavity 12 to reach the sound source outlet 11 is the same as the time when the sound source is emitted from the medium frequency sounding unit or the high frequency sounding unit and passes through the second semi-conical cavity 13 to reach the sound source outlet 11; the sound waves emitted by the medium frequency sounding unit or the high frequency sounding unit are coupled in the inner cavity of the shell 1 and reach the sound source outlet 11 and radiate to the far field. The utility model is composed of two units (i.e., the intermediate frequency unit and the high frequency unit) installed in a line source waveguide horn, which not only has a wider frequency response range, but also has a lower frequency response limit of the horn assembly in the application of line array speakers, and obtains more useful interference characteristics, and finally obtains higher sound clarity and intermediate frequency coverage advantages. Better crossover point phase coupling can be achieved without using electronic crossover (using power crossover), and one power amplifier channel can drive both the intermediate frequency and high frequency units.
[0026] It should be noted that, in combination with the current technological development status of speaker unit products at home and abroad, a more efficient compression drive unit is used to replace the traditional mid-frequency cone unit. At the same time, the sound waves of the mid-frequency and high-frequency units are coupled in the horn and reach the same sound outlet, which provides an efficient and energy-saving mid-frequency component solution for line array speakers. For example, the large diaphragm compression drive unit produced by some foreign manufacturers has a frequency response lower limit of 400Hz and a sensitivity of 123dB. Then, adding a compression unit with better high-frequency response and a slightly smaller diaphragm, a mid-high frequency combined sound source system with a very wide frequency response range and very high efficiency is formed.
[0027] Specifically, in this embodiment, the shell 1 is mainly composed of a cone cavity upper wall 14, a cone cavity lower wall 15, a cone cavity left wall 16 and a cone cavity right wall 17; the cone cavity upper wall 14, the cone cavity lower wall 15, the cone cavity left wall 16 and the cone cavity right wall 17 overlap each other to form the first semi-conical cavity 12, the second semi-conical cavity 13 and the sound source outlet 11.
[0028] Specifically, in this embodiment, the first diffuser 161 is recessed inwardly at one end of the cone cavity left wall 16 with a gradually enlarged diameter; the second diffuser 171 is recessed inwardly at one end of the cone cavity right wall 17 with a gradually enlarged diameter; the first diffuser 161 and the second diffuser 171 cooperate with the cone cavity upper wall 14 and the cone cavity lower wall 15 to form the sound source outlet 11. It should be noted that the shapes of the first diffuser 161 and the second diffuser 171 are composed of a parabola and a set of straight lines in the mathematical model, and the mathematical model can be formed by drawing a plane through the midpoint of the cone generatrix and the center of the bottom circle.
[0029] Specifically, in the present embodiment, the inner cavity of the housing 1 is symmetrically divided into a first semi-conical cavity 12 and a second semi-conical cavity 13. It should be noted that the first semi-conical cavity 12 and the second semi-conical cavity 13 can be symmetrically separated and arranged in the inner cavity of the housing 1, or can be arranged asymmetrically, as long as the acoustic path distance from the first semi-conical cavity 12 to the sound source outlet 11 is equal to the acoustic path distance from the second semi-conical cavity 13 to the sound source outlet 11.
[0030] Specifically, in this embodiment, the first semi-conical cavity 12 and the second semi-conical cavity 13 are both in the shape of a semi-cone as a whole. It should be noted that the horn with a semi-conical shape is more in line with the acoustic characteristics and further improves the overall performance of the horn.
[0031] Specifically, in this embodiment, the acoustic path distances from the first unit installation port 121 and the second unit installation port 131 to the sound source outlet 11 are the same. It should be noted that, for the horn with the same acoustic path distance composed of the first semi-conical cavity 12 and the second semi-conical cavity 13, the time for the sound source emitted by the two sound-emitting units of the intermediate frequency and the high frequency to reach the sound source outlet 11 from the sound source entrance is basically the same, and the frequency range with consistent phase near the crossover point is larger.
[0032] Specifically, in this embodiment, a plurality of assembly holes 2 are provided on the edges of the cone cavity upper wall 14, the cone cavity lower wall 15, the cone cavity left wall 16 and the cone cavity right wall 17. It should be noted that the assembly holes 2 facilitate the assembly of the cone cavity upper wall 14, the cone cavity lower wall 15, the cone cavity left wall 16 and the cone cavity right wall 17 into one body to form a horn with good structural stability.
[0033] The working principle of this utility model:
[0034] The utility model is an equidistant sound transmission waveguide horn composed of two semi-conical cavities. The time taken by the two intermediate frequency and high frequency sound-emitting units to reach the sound source outlet 11 from the first unit installation port 121 and the second unit installation port 131 (throat port) is basically the same, and the frequency range with consistent phases near the crossover point is larger. In practical applications, listeners can obtain coverage characteristics similar to that of a unit at different listening positions. Compared with a traditional horn device (the traditional method of installing one unit on a horn), it not only increases the frequency response range, but also improves the coverage consistency at different listening positions, effectively improving the overall sound quality in terms of sound clarity and intelligibility. In the design and production application of line array speakers, the online sound source waveguide angle outlet provides a wider frequency response range and a lower frequency lower limit, which can provide more effective intermediate frequency interference characteristics for line array speakers and effectively improve the clarity of sound.
[0035] In summary, the utility model has the following beneficial effects:
[0036] 1. By setting a first unit installation port 121 and a second unit installation port 131 on the housing 1, a high-frequency sound unit or an intermediate-frequency sound unit is installed on the first unit installation port 121 and the second unit installation port 131 respectively, better phase coupling of the crossover point can be achieved without using electronic crossover (using power crossover), and one power amplifier channel can drive both the intermediate-frequency and high-frequency units;
[0037] 2. One horn can be equipped with two compression drive units with different frequency response characteristics at the same time, one is a mid-frequency sound unit with a lower frequency response limit, and the other is a high-frequency sound unit with a higher frequency response limit, so that a frequency response with a wider frequency response range can be obtained near the outlet of a line sound source horn;
[0038] 3. The lower frequency limit of horn playback can be greatly reduced. Without the cone unit as the mid-frequency playback unit, the distance between the left and right low-frequency units can be made smaller during the design of the double-bass line array speaker, and the interference characteristics are closer to the requirements of the line sound source. Ultimately, the overall line array speaker system has a larger mid- and high-frequency sound pressure margin and better mid-frequency clarity.
[0039] The technical solutions provided by the embodiments of the present invention are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, according to the embodiments of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on the present invention.
Claims
1. A line sound source waveguide horn, comprising a housing; characterized in that: A sound source outlet with a gradually increasing diameter is provided at the top of the shell; the inner cavity of the shell is divided into a first semi-conical cavity and a second semi-conical cavity in two different directions; a first unit installation port is provided at one end of the first semi-conical cavity with a gradually decreasing diameter; a second unit installation port is provided at one end of the second semi-conical cavity with a gradually decreasing diameter; a medium-frequency sound unit or a high-frequency sound unit is installed on the first unit installation port; a high-frequency sound unit or a medium-frequency sound unit is installed on the second unit installation port; the time for the sound source to reach the sound source outlet after being emitted from the medium-frequency sound unit or the high-frequency sound unit through the first semi-conical cavity is the same as the time for the sound source to reach the sound source outlet after being emitted from the medium-frequency sound unit or the high-frequency sound unit through the second semi-conical cavity; the sound waves emitted by the medium-frequency sound unit or the high-frequency sound unit reach the sound source outlet after being coupled in the inner cavity of the shell and radiate to the far field.
2. A line sound source waveguide horn according to claim 1, characterized in that: The shell is mainly composed of an upper wall of the cone cavity, a lower wall of the cone cavity, a left wall of the cone cavity and a right wall of the cone cavity; the upper wall of the cone cavity, the lower wall of the cone cavity, the left wall of the cone cavity and the right wall of the cone cavity overlap each other to form the first half cone cavity, the second half cone cavity and the sound source outlet.
3. A line sound source waveguide horn according to claim 2, characterized in that: A first diffusion portion is recessed inwardly at one end of the left wall of the cone cavity where the diameter gradually expands; a second diffusion portion is recessed inwardly at one end of the right wall of the cone cavity where the diameter gradually expands; the first diffusion portion and the second diffusion portion cooperate with the upper wall of the cone cavity and the lower wall of the cone cavity to form the sound source outlet.
4. A line sound source waveguide horn according to claim 1, characterized in that: The inner cavity of the shell is symmetrically divided into a first semi-conical cavity and a second semi-conical cavity.
5. The line sound source waveguide horn according to claim 1, characterized in that: The first semi-conical cavity and the second semi-conical cavity are both in the shape of a semi-cone as a whole.
6. The line sound source waveguide horn according to claim 1, characterized in that: The acoustic path distances from the first unit installation port and the second unit installation port to the horn outlet are the same.
7. The line sound source waveguide horn according to claim 1, characterized in that: A plurality of assembly holes are arranged on the edges of the upper wall, the lower wall, the left wall and the right wall of the cone cavity.