CN112738688A

CN112738688A - Horn unit, horn array device and sound production device

Info

Publication number: CN112738688A
Application number: CN202011635329.7A
Authority: CN
Inventors: 赵淼; 刚晓鑫
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-07-30
Filing date: 2020-12-31
Publication date: 2021-04-30
Also published as: CN213522339U; CN112839287A; CN112839287B; CN213990998U; CN112714379A

Abstract

The invention provides a horn unit, a horn array device and a sound production device, wherein the horn unit comprises: the first sound wave guide inlet pipe and the second sound wave guide outlet pipe comprise a first trapezoidal side surface and a second trapezoidal side surface which are arranged in parallel and a first square side surface and a second square side surface which are arranged oppositely, and the cross sections of the first trapezoidal side surface and the second trapezoidal side surface are squares which gradually become larger along the sound wave conduction direction; the small ends of the cross sections of the first sound wave leading-in pipe and the second sound wave leading-in pipe are transited from square to form a round sound-emitting opening; the large end of the cross section of the sound wave superposition delivery pipe is a square sound outlet; the large ends of the cross sections of the first and second sound wave leading-in pipes are connected with the small ends of the cross sections of the sound wave superposition outgoing pipes, the first trapezoidal side surfaces of the first and second sound wave leading-in pipes are abutted to form a V-shaped groove, and the second trapezoidal side surfaces of the first and second sound wave leading-in pipes are abutted to the first and second square side surfaces of the sound wave superposition outgoing pipe, so that sound waves are transmitted into the sound wave leading-in pipes from the circular sound-generating ports and then are superposed in the sound wave superposition outgoing pipes and transmitted out from the square sound-generating ports. Through the scheme, the sound pressure level and the directivity can be improved.

Description

Horn unit, horn array device and sound production device

Technical Field

The invention relates to the technical field of acoustics, in particular to a horn unit, a horn array device and a sound production device.

Background

In the prior art, the high-sound-pressure-level sound wave device is designed differently according to different acoustic index requirements, and each product can be finished after a long time after being changed greatly, so that time and labor are wasted, and the cost is wasted. Often a product design, if need new index will carry out new design again, and simultaneously, in view of the restriction of the flexibility in space, also very big integrated equipment of design volume realizes high-effect, the acoustic equipment of strong sound pressure level, moreover, the equipment of every different index, difficult unified maintenance and upgrading, sustainability performance improvement each other is very poor, high-effect acoustic equipment receives more and more attention in present security protection, but the technical bottleneck is difficult to break through, the sound pressure level has arrived the summit, difficult promotion again and lead to acoustic energy equipment delay and can not be used on a large scale.

Therefore, in the prior art, increasing the sound pressure level is a problem to be solved.

Disclosure of Invention

In view of this, embodiments of the present invention provide a horn unit, a horn array device, and a sound generating device to improve the sound pressure level of a sound pressure device.

The technical scheme of the invention is as follows:

according to an aspect of an embodiment of the present invention, there is provided a horn unit including: the acoustic wave superposition delivery pipe and the at least one pair of acoustic wave leading-in pipes; each pair of sound wave leading-in pipes comprises a first sound wave leading-in pipe and a second sound wave leading-in pipe; the first sound wave leading-in pipe, the second sound wave leading-in pipe and the sound wave superposition leading-out pipe respectively comprise a first trapezoidal side face and a second trapezoidal side face which are arranged in parallel, and a first square side face and a second square side face which are arranged oppositely, and the cross sections of the first trapezoidal side face and the second trapezoidal side face are squares which become larger gradually along the sound wave conduction direction;

the end, with the smaller cross section, of the first sound wave leading-in pipe is in transition from a square cross section to form a first round sound-emitting opening; the end with the smaller cross section of the second sound waveguide inlet pipe is formed with a second round sound emitting port through transition of a square cross section; a square sound outlet is formed at one end of the sound wave superposition outgoing pipe with a larger cross section; the end with the larger cross section of the first sound wave leading-in pipe and the end with the larger cross section of the second sound wave leading-in pipe are both connected with the end with the smaller cross section of the sound wave superposition outgoing pipe, and the first trapezoidal side surface of the first sound wave introduction pipe and the first trapezoidal side surface of the second sound wave introduction pipe are abutted to form a V-shaped groove, the second trapezoidal side surface of the first sound wave leading-in pipe and the second trapezoidal side surface of the second sound wave leading-in pipe are respectively adjacent to the first square side surface and the second square side surface of the sound wave superposition outgoing pipe, so that the same two sound wave signals are respectively transmitted into the first sound wave leading-in pipe from the first circular sound-emitting port and transmitted into the second sound wave leading-in pipe from the second circular sound-emitting port, and then are superposed in the sound wave superposition leading-out pipe, and superposed and enhanced sound wave signals are transmitted from the square sound-emitting port.

In some embodiments, the V-shaped groove has an included angle in a range of 15 degrees to 20 degrees.

In some embodiments, the acoustic wave superposition delivery tube has a depth of between one and two times a wavelength of the incoming acoustic wave signal.

In some embodiments, the included angles of the V-shaped grooves corresponding to each pair of sound wave introduction tubes are all equal, and the included angle of the two waist extension lines of the first trapezoid side surface and the included angle of the two waist extension lines of the second trapezoid side surface of the sound wave superposition output tube are all equal to the included angle of the V-shaped grooves corresponding to the sound wave introduction tubes.

In some embodiments, the first sonic ingress pipe and the second sonic ingress pipe of each pair of sonic ingress pipes are symmetrically disposed, the specifications of the respective pairs of sonic ingress pipes are the same, and the respective pairs of sonic ingress pipes are arranged along the extending direction of the V-shaped groove thereof.

In some embodiments, the sum of the lengths of the bottom sides of the second trapezoidal side surfaces of the first sound wave introduction tubes of each pair of sound wave introduction tubes adjacent to the second square side surface of the sound wave superposition outgoing tube is equal to the length of the corresponding side of the second square side surface of the sound wave superposition outgoing tube.

In some embodiments, the end of the sound wave superposition delivery tube with the larger cross section forms a square sound outlet by simultaneously extending and expanding the first square side surface and the second square side surface of the sound wave superposition delivery tube and combining the matching extension parts of the first trapezoid side surface and the second trapezoid side surface of the sound wave superposition delivery tube.

In some embodiments, at least one edge of the square sound outlet of the sound wave superposition delivery pipe extends outwards vertically to form an edge portion, and the edge portion is used for fixing the bugle unit to an external device.

According to another aspect of the embodiments of the present invention, there is provided a horn array apparatus, including: a plurality of horn units as described in any of the above embodiments; the square sound outlets of the sound wave superposition delivery pipes in each horn unit are arranged in the same direction and flush with each other.

According to another aspect of an embodiment of the present invention, there is provided a sound emitting device including: the horn unit, the vibration unit and the control unit as described in any of the above embodiments; each first circular sound-emitting port and each second circular sound-emitting port of the horn unit are respectively provided with a vibration unit; the control unit is used for inputting synchronous control signals to all the vibration units so that all the vibration units generate the same sound wave signals.

In some embodiments, the vibration unit comprises a phase plug, a horn, a piezoelectric ceramic diaphragm, a sound film and a resonant sound cavity;

the phase plug includes a central shaft portion and a plurality of fins; one end of the middle shaft part of the phase plug is in a first conical shape, and the other end of the middle shaft part of the phase plug is in a second conical shape; the bottom of the first cone is completely aligned and connected with the bottom of the second cone, and the height of the first cone is larger than that of the second cone; the top of the second cone is used for bonding the middle part of a sound film which can be matched with the second cone in a taper mode; the fins are vertically arranged on the side surface of the first cone, and the plane where each fin is located is superposed with the axial section of the first cone; each fin comprises a first side edge, a second side edge and a third side edge, the first side edge of each fin is arranged along the side surface of the first cone, the second side edge of each fin is arranged along one edge of the cross section of the second cone in an extending mode, the outline formed by the second side edges of all the fins is in the shape of a circular truncated cone side surface and is on the same conical surface with the side surface of the second cone, and the third side edges of all the fins can extend and converge at one point to form a conical surface outline surrounding the side surface of the first cone; the included angles of the planes of two adjacent ribs are set angles;

the short horn comprises a sound wave restraint part and a peripheral part; the sound wave restraint part comprises a contraction part and a cylindrical part, and one end of the contraction part with a thinner port is connected with one end of the cylindrical part to form a funnel shape; the inner circumferential surface of the contraction part is arranged around the outer sides of the third sides of all the fins of the phase plug so as to form a sound wave transmission channel between every two adjacent fins; the peripheral part is arranged around the periphery of the sound wave restraining part to be matched with the resonance sounding cavity to form a resonance sounding cavity for accommodating the phase plug, the sound film and the piezoelectric ceramic vibrating diaphragm; the top of the second cone of the phase plug is bonded with the middle part of one side of the sound film; the other side of the sound film is bonded with the middle part of the ceramic surface at one side of the piezoelectric ceramic vibration film; the other end of the cylindrical portion is in contact with the circular sound emitting port of the horn unit to form a passage for superimposing sound waves.

In some embodiments, the piezoceramic diaphragm comprises: the piezoelectric ceramic diaphragm comprises a circular metal sheet and a circular piezoelectric ceramic diaphragm adhered to one side surface of the metal sheet;

the diameter range of the piezoelectric ceramic diaphragm is 26.55mm to 37.55mm, the diameter range of the metal sheet is 28mm to 39mm, and the diameter of the piezoelectric ceramic diaphragm is smaller than that of the metal sheet; the thickness range of the piezoelectric ceramic membrane is 285-315 mu m, and the thickness range of the metal sheet is 190-210 mu m;

the piezoelectric ceramic membrane comprises an oxygen element, a titanium element, a zirconium element, a lead element, a strontium element and a niobium element, wherein the content range of the strontium element is 3.56-3.94%, and the content range of the niobium element is 5.38-5.95%.

In some embodiments, the phase plug comprises: the included angle of the planes of two adjacent ribs ranges from 12 degrees to 18 degrees; the taper of the first cone ranges from 10 degrees to 16 degrees.

According to the sound generating unit, the horn array device and the sound generating device, high-performance acoustic efficiency equipment is decomposed into the single independent working module, the modules are arrayed, various acoustic equipment with high acoustic effect deterrence force and high sound pressure level of various different requirements can be flexibly achieved through the array, and the sound pressure level can be improved without limit by using the acoustic equipment.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

It will be appreciated by those skilled in the art that the objects and advantages that can be achieved with the present invention are not limited to the specific details set forth above, and that these and other objects that can be achieved with the present invention will be more clearly understood from the detailed description that follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention. For purposes of illustrating and describing some portions of the present invention, corresponding parts of the drawings may be exaggerated, i.e., may be larger, relative to other components in an exemplary apparatus actually manufactured according to the present invention. In the drawings:

fig. 1 is a schematic structural diagram of a horn unit according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a horn array device according to an embodiment of the present invention;

FIG. 3 is a schematic illustration of the superposition of sound waves;

FIG. 4 is a schematic structural diagram of a sound generating device according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a vibration unit according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a phase plug according to an embodiment of the present invention;

fig. 7 is a schematic structural view of a resonance sounding cavity according to an embodiment of the present invention;

FIG. 8 is a bottom view of a horn according to an embodiment of the present invention;

FIG. 9 is a frequency response curve of a sound generating device according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a cascade sound generating device according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following embodiments and accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.

It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the scheme according to the present invention are shown in the drawings, and other details not so relevant to the present invention are omitted.

It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, elements, steps or components, but does not preclude the presence or addition of one or more other features, elements, steps or components.

It is also noted herein that the term "coupled," if not specifically stated, may refer herein to not only a direct connection, but also an indirect connection in which an intermediate is present.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the same reference numerals denote the same or similar parts, or the same or similar steps.

In acoustics, multiple sound sources converge in a linear source, a curve source, a plane source and the like, and a strong sound point sound source radiates a sound field, so that the sound field has certain divergence and has no directivity. The curved array in the line source combination is particularly suitable for long-distance sound radiation and has excellent directivity of a covering surface. For a cone radiator, the acoustic waves cancel each other out in antiphase at higher frequencies and at a difference in distance of one half wavelength. An array sound source is the result of the superposition of sound waves radiated by different parts of a plurality of sound sources in the far field of the free field. Therefore, in the present application, the point sound source radiation is transmitted in a directional manner by restricting the frequency band, amplitude, radiation and reflection angle of the sound source.

Fig. 1 is a schematic structural diagram of a horn unit according to an embodiment of the present invention. As shown in fig. 1, the horn unit includes a sound wave superposition outgoing tube 300 and at least one pair of sound wave incoming tubes; each pair of sonic ingress pipes includes a first sonic ingress pipe 100 and a second sonic ingress pipe 200; the first acoustic wave inlet pipe 100, the second acoustic wave inlet pipe 200 and the acoustic wave superposition outlet pipe 300 respectively comprise a first trapezoidal side surface 100a and a second trapezoidal side surface 100b of the first acoustic wave inlet pipe which are arranged in parallel, and a first square side surface 100c and a second square side surface which are arranged oppositely; the first trapezoidal side 200a and the second trapezoidal side 200b of the second sound waveguide inlet pipe and the first square side 200c and the second square side which are oppositely arranged; the sound waves are superposed with the first trapezoidal side 300a and the second trapezoidal side 300b of the delivery tube and the first square side 300c and the second square side which are oppositely arranged; and the cross sections of the three are square shapes which become bigger gradually along the conduction direction of the sound wave.

The end with the smaller cross section of the first sound wave leading-in pipe is formed with a first round sound-emitting opening 110 by the transition of a square cross section; the end with the smaller cross section of the second sound waveguide inlet pipe is formed with a second round sound emitting port through transition of a square cross section; a square sound outlet 310 is formed at the end with the larger cross section of the sound wave superposition outgoing pipe; the end with the larger cross section of the first sound wave leading-in pipe and the end with the larger cross section of the second sound wave leading-in pipe are both connected with the end with the smaller cross section of the sound wave superposition outgoing pipe, and the first trapezoidal side of the first sound wave introduction pipe and the first trapezoidal side of the second sound wave introduction pipe are adjoined to form a V-shaped groove 120, the second trapezoidal side 100b of the first sound wave introduction pipe and the second trapezoidal side 200b of the second sound wave introduction pipe are respectively adjacent to the first square side 300c and the second square side 300d of the sound wave superposition outgoing pipe, so that the same two sound wave signals are respectively transmitted into the first sound wave leading-in pipe from the first circular sound-emitting port and transmitted into the second sound wave leading-in pipe from the second circular sound-emitting port, and then are superposed in the sound wave superposition leading-out pipe, and superposed and enhanced sound wave signals are transmitted from the square sound-emitting port.

As shown in fig. 1, the sound wave introducing pipe can be one pair, two pairs or three pairs. The first sound wave leading-in pipe, the second sound wave leading-in pipe and the sound wave superposition leading-out pipe are respectively provided with a first trapezoidal side face, a second trapezoidal side face, a first square side face and a second square side face, the first trapezoidal side face in each structure can be parallel to the second trapezoidal side face, and the first square side face can be opposite to the second square side face. And respective sides opposite the first square side and the second square side may be aligned. The trapezoids in each structure may be connected to the sides of a square. The cross section of the structure formed by connecting the first trapezoidal side face, the second trapezoidal side face, the first square side face and the second square side face is rectangular, and the square cross section from the sound wave introducing pipe to the position where the sound wave is transmitted from the sound wave guiding pipe is gradually enlarged. And the bugle unit gathers and bunches the sound waves by effectively concentrating the sound waves at the front part of the sound wave superposition delivery pipe, so that the sound can be concentrated at the front part and infinitely superposed without mutually offsetting.

In the horn unit, the first sound wave introduction pipe reduces the loss of sound waves during transmission by using the first circular sound emitting port, and the second sound wave introduction pipe reduces the loss of sound waves during transmission by using the second circular sound emitting port. By abutting the side surfaces of the first sound wave introduction pipe and the second sound wave introduction pipe with the groove, sound is concentrated at one point according to the characteristics of sound wave frequency, and useless sound waves are filtered.

The included angle of the V-shaped groove is formed by connecting the first sound wave leading-in pipe and the second sound wave leading-in pipe at the sound wave superposition leading-out pipe. The bottom of the V-shaped groove can also be in other shapes, for example, the bottom of the V-shaped groove can also be in a V shape with a certain curvature and a bottom with a curvature. The included angle of the V-shaped groove can be any included angle within the included angle range of 15 degrees, 16 degrees, 17 degrees, 18 degrees, 19 degrees or 20 degrees. The included angle of the V-shaped groove is set, so that the directivity of the horn component to sound waves is improved, and further the loss and reduction of the sound waves in the transmission process are reduced. If the included angle of the V-shaped groove is too large, the sound waves respectively introduced by the first sound wave introduction pipe and the second sound wave introduction pipe are offset. Therefore, by setting the angle of the V-shaped groove to an angle within 15 degrees to 20 degrees, the sound pressure level of the sound wave audible to the human ear is high in the frequency band of the frequency range of 3.4kHz to 3.8 kHz.

The depth of the acoustic wave superposition outgoing pipe can be 1.1 times, 1.2 times, 1.3 times, 1.4 times, 1.5 times, 1.6 times, 1.7 times, 1.8 times, 1.9 times or 2.0 times of the wavelength of the incoming acoustic wave signal. For example, the acoustic wave superposition delivery tube may be 1.2 times deep. And the wavelength of the different frequency channels that the different bugle units correspond can produce the restraint to sound, consequently, to the sound wave of different frequency channels, the length of sound wave stack contact tube can set up according to the difference of sound wave frequency channel. The wavelength stacking delivery tube may be set to a length between one and two times the wavelength of the incoming acoustic signal. In addition to the case where there is a pair of sound wave introduction pipes, there is also a case where there are a plurality of pairs of sound wave introduction pipes as one module, and the plurality of pairs of sound wave introduction pipes may be provided so as to improve the transmission effect of sound waves.

Wherein, the horn unit can have a plurality of pairs of sound wave leading-in pipes. Because the sound wave transmission is a fluctuating process, interference phenomena can be generated when a plurality of sound waves are transmitted simultaneously, and local sound energy enhancement and attenuation phenomena can be generated in a sound field. The propagated waveform can be artificially controlled by adjusting the propagation characteristics of different sound waves, so that the energy distribution in the sound field is changed. Therefore, the energy loss caused by geometric attenuation in the propagation process is reduced, and higher sound pressure level and energy can be obtained in the target direction, so that the energy utilization rate is improved as much as possible.

The first sound wave leading-in pipe and the second sound wave leading-in pipe can be symmetrically arranged about the central line of the V-shaped groove, the first trapezoid side face of the first sound wave leading-in pipe and the first trapezoid side face of the second sound wave leading-in pipe can be symmetrically arranged, so that sound waves are transmitted to the sound wave superposition leading-out pipe simultaneously when being transmitted, and the symmetrical arrangement can enable the sound wave superposition effect to be better. The same specification of each pair of sound wave leading-in pipes can indicate that the size, the dimensional data, the shape, the quality and the volume of the sound wave leading-in pipes are the same, and can also indicate that the included angles of the V-shaped grooves between each pair of sound wave leading-in pipes are the same. And the extending direction of the V-shaped groove can be a direction perpendicular to the first trapezoidal side surface and the second trapezoidal side surface of the acoustic wave superposition outgoing pipe, so that each pair of acoustic wave incoming pipes keep all the pairs of acoustic wave incoming pipes aligned in the extending direction of the V-shaped groove.

Fig. 2 is a schematic structural diagram of a horn array device according to an embodiment of the present invention. As shown in fig. 2, for example, in the case where three pairs of sound wave introduction tubes are simultaneously present in the bugle unit, the three pairs of sound wave introduction tubes have the same size, the included angles of the V-shaped grooves are the same, and the pairs of sound wave introduction tubes are aligned in a direction perpendicular to the first trapezoidal side and the second trapezoidal side of the sound wave superimposition output tube.

The sum of the second trapezoidal side surfaces of the first sound wave lead-in pipes in each pair of sound wave lead-in pipes is equal to the length of the corresponding side of the second square side surface of the sound wave superposition lead-out pipe, and the corresponding side of the second square side surface of the sound wave superposition lead-out pipe is a side connected with the second trapezoidal side surface of the first sound wave lead-in pipe.

The square sound outlet enables sound waves to be superposed at the square sound outlet infinitely, so that the sound pressure level can be improved, and two front bugles exist in each module in a cascade connection mode to enable the sound to be concentrated at one point; fig. 3 is a schematic diagram of sound wave superposition, as shown in fig. 3, (a) in fig. 3 shows that sound waves are overlapped with each other and the directivity of the sound waves is poor during the superposition process; fig. 3(b) shows that the mutual superposition effect between the sound waves is enhanced and has better directivity. As shown in fig. 3(b), the sound waves can be reduced and offset with each other, and the square sound outlet can better transmit the sound waves.

Wherein, outwards extend into border portion with square sound outlet perpendicularly and can be convenient in fixing in external device to set up a plurality of screw in the border portion department that forms, can be with its inseparable fixed on external device, so that in the in-process that uses, the bugle unit appears rocking in external device, makes the acoustic wave subduct in the transmission process.

As shown in fig. 2, according to another aspect of the embodiment of the present invention, there is provided a horn array apparatus including: a plurality of horn units as described in any of the above embodiments; the square sound outlets of the sound wave superposition delivery pipes in each horn unit are arranged in the same direction and flush with each other.

The square sound outlets of the tubes can be overlapped with the sound waves of the horn units in the same direction, so that the horn units emit the sound waves and the sound waves are enhanced. For example, three horn units may be placed in the horizontal direction with their square sound outlets facing the same or three horn units may also be placed in the vertical direction along the same plane with their facing remaining the same. A plurality of horn units are arrayed in a group, so that the horn units can be conveniently stacked and used in the using process. Therefore, high sound effect deterrence of various different requirements can be realized by cascading the horn units

Fig. 4 is a schematic structural diagram of a sound generating device according to an embodiment of the present invention. As shown in fig. 4, according to another aspect of the embodiment of the present invention, there is provided a sound emitting apparatus including: the horn unit, the vibration unit and the control unit as described in any of the above embodiments; each first circular sound-emitting port and each second circular sound-emitting port of the horn unit are respectively provided with a vibration unit; the control unit is used for inputting synchronous control signals to all the vibration units so that all the vibration units generate the same sound wave signals.

The control unit transmits a control signal to the vibration unit, so that the piezoelectric ceramics in the vibration unit vibrate to generate sound wave signals, the sound wave signals are transmitted to the horn unit, the sound wave signals transmitted by the vibration units are superposed in the horn unit, and the superposed sound wave signals are directionally propagated.

Fig. 5 is a schematic structural diagram of a vibration unit according to an embodiment of the present invention. As shown in fig. 5, the vibration unit includes a phase plug, a horn, a piezoelectric ceramic diaphragm, a sound film, and a resonance sounding cavity;

fig. 6 is a schematic structural diagram of a phase plug according to an embodiment of the invention. As shown in fig. 6, the phase plug includes a central shaft portion 10 and a plurality of ribs 20; one end of the middle shaft part of the phase plug is in a first cone 11 shape, and the other end of the middle shaft part of the phase plug is in a second cone shape; the base of the first cone 11 is perfectly aligned and contiguous with the base of the second cone, and the height of the first cone 11 is greater than the height of the second cone; the top of the second cone is used for bonding the middle part of a sound film which can be matched with the second cone in a taper mode; the fins 20 are vertically arranged on the side surface of the first cone 11, and the plane of each fin 20 is superposed with the axial section of the first cone 11; each fin comprises a first side edge, a second side edge 21 and a third side edge 22, the first side edge of each fin is arranged along the side surface of the first cone 11, the second side edge 21 of each fin is arranged along one side of the cross section of the second cone in an extending mode, the outline formed by the second side edges 21 of all the fins is in the shape of a circular truncated cone side surface and is on the same conical surface with the side surface of the second cone, and the third side edges 22 of all the fins can be extended and converged at one point to form a conical surface outline surrounding the side surface of the first cone 11; the included angles of the planes of two adjacent ribs are set angles; the short horn comprises a sound wave restraint part and a peripheral part; the sound wave restraint part comprises a contraction part and a cylindrical part, and one end of the contraction part with a thinner port is connected with one end of the cylindrical part to form a funnel shape; the inner circumferential surface of the contraction part is arranged around the outer sides of the third sides of all the fins of the phase plug so as to form a sound wave transmission channel between every two adjacent fins; fig. 7 is a schematic structural view of a resonance sound-producing cavity according to an embodiment of the present invention, and as shown in fig. 7, the peripheral portion is disposed around the periphery of the sound wave confining portion to cooperate with the resonance sound-producing cavity to form a resonance sound-producing cavity for accommodating the phase plug, the sound film, and the piezoelectric ceramic diaphragm; the top of the second cone of the phase plug is bonded with the middle part of one side of the sound film; the other side of the sound film is bonded with the middle part of the ceramic surface at one side of the piezoelectric ceramic vibration film; fig. 8 is a schematic bottom structure view of a horn of a short length according to an embodiment of the present invention, and as shown in fig. 8, the other end of the cylindrical portion is in contact with the circular sound emitting port of the horn unit to form a channel for superimposing sound waves.

The bottoms of the two cones of the middle shaft part of the phase plug are completely aligned and connected, the height of the first cone is larger than that of the second cone, and the taper of the second cone is related to the sound film bonded on the taper of the second cone; thus, the taper of the first cone is related to the first cone. The fins of the phase plug are evenly spaced, so that sound waves can be extruded and transmitted out from the fins, the convergence point of the extension lines of the fins can be coincided with the taper angle of the first cone, the sound waves are guided by the fins, the sound waves are converged to the cone head, and the sound pressure level of the sound waves can be improved by extruding the sound waves among the fins. Instead of pressing and propagating the sound waves through the fins, sound channels may be arranged using prisms. For example, the fins of the phase plug for forming the acoustic channel may have a quadrangular shape, one end connected to the second cone is a first rectangle, one end connected to the first cone is a second rectangle, the first rectangle is parallel to the second rectangle, the surface opposite to the central body has a trapezoidal shape, the upper base of the trapezoidal shape coincides with the wide side of the second rectangle, the lower base coincides with the wide side of the first rectangle, and the extension line of the perpendicular bisector of the trapezoidal shape converges at the vertex of the taper angle of the first cone.

In some embodiments, the angle between the planes of two adjacent ribs ranges from 12 degrees to 18 degrees. The angle of two adjacent fins is related to the sound wave frequency, and the larger the sound wave frequency is, the smaller the included angle of the fins of the phase plug is. The included angle of the planes of two adjacent ribs can be 12 degrees, 13 degrees, 14 degrees, 15 degrees, 16 degrees, 17 degrees or 18 degrees, and the like. For example, the angle between the planes of two adjacent ribs is 18 degrees.

In some embodiments, the taper of the first cone ranges from 10 degrees to 16 degrees. The taper range of the phase plug is a set taper range which can reflect sound waves of sound in a sensitive frequency range of human ears and superpose the sound waves in the same phase. The taper being related to the taper of the second cone. The taper of the first cone may be at other angles such as 10 degrees, 11 degrees, 12 degrees, 13 degrees, 14 degrees, 15 degrees, or 16 degrees. For example, the taper of the first cone is 10 degrees.

An included angle formed by the side wall of the contraction part of the short horn and the central axis needs to be equal to an included angle formed by the third side edge of the rib of the phase plug and the central axis, so that when the phase plug is placed in the short horn, the inner side wall of the contraction part and the phase plug can be tightly attached together, and in the process of transmitting sound waves, the sound waves cannot be transmitted from other positions outside a sound wave transmission channel formed by the two positions; and, can also set up a plurality of recesses at the inside wall, set up the mounting in the outside of phase place stopper to the recess that makes the inside wall can combine by the mounting of phase place stopper, reaches the purpose of fixing the phase place stopper. The peripheral part of the end of the short horn inserted into the phase plug is provided with a groove for fixing the silica gel pad. The short horn and one end of the resonance sounding cavity can be tightly jointed together, so that sound waves cannot be spread outwards from the joint of the short horn and the resonance sounding cavity, and the sound waves are transmitted by pushing air and the air is pushed to be emitted outwards; and the formed space is used for accommodating the piezoelectric ceramic piece, the sound film, the silica gel pad and the phase plug. The short horn increases the compression ratio by reducing the area of the sound wave unit radiation outlets, increasing the number of the sound wave radiation outlets and restricting the angle of sound wave radiation, thereby achieving the purpose of improving the sound pressure level. The vibration unit can ensure that the energy of sound waves can be directly radiated, the loss of the radiated energy is extremely low, the back-and-forth reverberation is avoided, and the time difference caused by the back-and-forth reverberation is avoided, so that the sound waves in the process of sound wave superposition cannot reach the peak of the wave simultaneously and the optimal effect of sound wave superposition cannot be achieved if the time difference exists.

Therefore, aiming at the characteristic of storing energy by resonance in vibration according to the frequency response of the sensitive frequency band of the human ear, the highest sound pressure level is realized when the volume of the resonance sounding cavity reaches a certain volume. The design of the phase plug taper corresponding to the wavelength of the resonance point at the frequency of the ear sensitive frequency band can realize the reflection of the sound wave and the full superposition of the same phase. And the superposition is realized when the vibration amplitude peak value is reached during the transmission of the sound wave with the resonance point frequency, so that the phenomenon that the energy is mutually counteracted due to opposite phases is avoided, and the axial restraint and transmission of the sound wave are facilitated.

In some embodiments, the piezoceramic diaphragm comprises: the piezoelectric ceramic diaphragm comprises a circular metal sheet and a circular piezoelectric ceramic diaphragm adhered to one side surface of the metal sheet; the diameter range of the piezoelectric ceramic diaphragm is 26.55mm to 37.55mm, the diameter range of the metal sheet is 28mm to 39mm, and the diameter of the piezoelectric ceramic diaphragm is smaller than that of the metal sheet; the thickness range of the piezoelectric ceramic membrane is 285-315 mu m, and the thickness range of the metal sheet is 190-210 mu m; the piezoelectric ceramic membrane comprises an oxygen element, a titanium element, a zirconium element, a lead element, a strontium element and a niobium element, wherein the content range of the strontium element is 3.56-3.94%, and the content range of the niobium element is 5.38-5.95%.

Since the diameter of the piezoceramic diaphragm is smaller than that of the metal sheet, the diameter of the piezoceramic diaphragm can be 26.55mm, 26.65mm, 26.75mm, 26.85mm, 26.95mm, 27.05mm, 27.15mm, 27.25mm, 27.35mm, 27.45mm, 29.50mm, 29.53mm, 29.55mm, 29.57mm, 29.61mm, 29.64mm, 29.66mm, 29.68mm, 29.78mm, 29.88mm, 29.98mm, 30,08mm, 30.18 and the like. The metal sheet may have a diameter of 28.12mm, 28.22mm, 28.34mm, 28.45mm, 28.53mm, 28.55mm, 28.67mm, 28.79mm, 28.85mm, 29.15mm, 29.28mm, 31.56mm, 31.58mm, 31.60mm, 31.63mm, 31.67mm, 31.69mm, 31.71mm, 32.12mm, or the like. Or the diameter of the piezoelectric ceramic diaphragm can be set to be 29.75mm, 29.77mm, 29.79mm, 29.82mm, 29.84mm, 29.85mm, 29.88mm or 29.91 mm; the diameter of the metal sheet is set to 30.23mm, 30.25mm, 30.27mm, 30.30mm, 30.31mm, 30.33mm, 30.36mm, 30.38mm, 31.21mm, or the like. The thickness of the piezoelectric ceramic diaphragm can be set to 285 μm, 287 μm, 289 μm, 290 μm, 291 μm, 293 μm, 296 μm, 299 μm, or the like; the thickness of the metal sheet may be set to 190 μm, 191 μm, 193 μm, 194 μm, 196 μm, 198 μm, 201 μm, 203 μm, or the like.

By adjusting the content of each element in the piezoelectric ceramic film, the piezoelectric ceramic film has higher toughness in the use process, can be used for a longer time and is not easy to break in the use process. The content of the strontium element can be set to other contents of 3.56%, 3.57%, 3.59%, 3.61%, 3.63%, 3.66%, 3.68%, or 3.70%, and the content of the niobium element can be set to other contents of 5.38%, 5.40%, 5.41%, 5.43%, 5.46%, 5.48%, 5.51%, or 5.53%. The growth of ceramic crystal grains can be more uniform by adjusting the content of each element in the piezoelectric ceramic membrane, and the generated crystal grains have fewer air holes, good compactness and high conductive efficiency, so that better sound stimulation can be generated.

Illustratively, the diameter of the piezoceramic diaphragm is set to 29.53mm, the diameter of the metal sheet is set to 31.58mm or the diameter of the piezoceramic diaphragm is set to 29.77mm, and the diameter of the metal sheet is set to 31.21 mm. The thickness of the piezoelectric ceramic diaphragm is set to 289 μm, and the thickness of the metal plate is set to 193 μm. Because the bottoms of the two cones of the shaft part in the phase plug are completely aligned and connected, the height of the first cone is larger than that of the second cone, and the taper of the second cone is related to the sound film bonded on the taper of the second cone; thus, the taper of the first cone is related to the first cone. The fins of the phase plug are evenly spaced, so that sound waves can be extruded and transmitted out from the fins, the convergence point of the extension lines of the fins can be coincided with the taper angle of the first cone, the sound waves are guided by the fins, the sound waves are converged to the cone head, and the sound pressure level of the sound waves can be improved by extruding the sound waves among the fins. Instead of pressing and propagating the sound waves through the fins, sound channels may be arranged using prisms. For example, the fins of the phase plug for forming the acoustic channel may have a quadrangular shape, one end connected to the second cone is a first rectangle, one end connected to the first cone is a second rectangle, the first rectangle is parallel to the second rectangle, the surface opposite to the central body has a trapezoidal shape, the upper base of the trapezoidal shape coincides with the wide side of the second rectangle, the lower base coincides with the wide side of the first rectangle, and the extension line of the perpendicular bisector of the trapezoidal shape converges at the vertex of the taper angle of the first cone.

In some embodiments, the piezoelectric ceramic diaphragm includes a first piezoelectric ceramic diaphragm, a second piezoelectric ceramic diaphragm, and a metal sheet; the first piezoelectric ceramic membrane and the second piezoelectric ceramic membrane are symmetrically bonded on two sides of the metal sheet.

One side of a metal sheet of the piezoelectric ceramic diaphragm is bonded with the first piezoelectric ceramic diaphragm, the other side of the metal sheet is bonded with the second piezoelectric ceramic diaphragm, the first piezoelectric ceramic diaphragm and the second piezoelectric ceramic diaphragm are identical in size, and the first piezoelectric ceramic sheet and the second piezoelectric ceramic sheet are respectively symmetrical in bonding positions on two sides of the metal sheet so as to generate force for increasing sound wave energy.

In some embodiments, the vibration unit further includes: and the silica gel pad is arranged between the peripheral edge of the peripheral part of the short horn and the sound film.

The piezoelectric ceramic vibrating diaphragm is arranged on the base, the piezoelectric ceramic vibrating diaphragm is arranged. Under the condition that the vibration unit works, the sound film is in contact with the phase plug, although a certain interval exists between the sound film and the phase plug, partial contact still exists, the frequency characteristic is changed due to the change of the contact proportion, and the contact proportion of the sound film and the phase plug in the working process can be determined by the height of the silica gel pad.

In some embodiments, the thickness of the silicone pad ranges from 1.5mm to 3 mm. Wherein, the thickness of the silica gel pad can be 1.51mm, 1.53mm, 1.54mm, 1.55mm, 1.56mm, 1.58mm, 1.59mm, 2.11mm, 2.12mm, 2.30mm, 2.31mm and the like. The height of the silica gel pad can be selected according to the frequency characteristics of actual needs so as to achieve the best effect of the required sound waves.

In some embodiments, the sound membrane is a paper sound membrane having a mass of 0.2 x (1 ± 5%) g. Wherein, the mass range of the paper sound film is 0.2g (1-5%) to 0.2g (1+ 5%), namely, the mass range of the paper sound film is 0.19g to 0.21 g. For example, the mass of the paper sound membrane may be 0.191g, 0.193g, 0.195g, 0.197g, 0.199g, 0.201g, 0.203g, or the like. Moreover, the single characteristics of the elastic modulus, the quality and the compliance can determine the distortion degree of the sound and the degree of frequency response; by comparing the elastic modulus, the quality and the compliance of the PVC sound film, the polymer sound film and the paper sound film, the highest sound pressure level index can be obtained when the paper sound film is matched with the piezoelectric ceramic vibrating diaphragm to form the vibrating unit under the condition that the mass of the paper sound film is 0.2 multiplied by (1 +/-5%) g. If a common sound film or other sound films are used, it is found that the distortion of the reproduced human voice is high.

The effect of the sound generating device composed of the horn unit shown in fig. 1 and the vibration unit shown in fig. 5 was tested. As shown in fig. 9, fig. 9 shows frequency response curves generated by different sound generating devices, wherein curve 1 shows the effect generated when the optimum device constructed by the structure of the optimum parameters is used for testing, for example, the horn unit shown in fig. 1 is used, and various parameters of the horn unit are set, such as the included angle of the V-shaped groove, the depth of the sound wave superposition delivery pipe and the like; the vibration unit connected with the horn unit is a piezoelectric ceramic piece made of a piezoelectric ceramic vibrating diaphragm with a set material proportion, a phase plug with a set angle and the like. Curve 2 shows the change in frequency response produced by a prior art moving coil horn. In the frequency band range sensitive to human ears, namely 3 kHz-5 kHz in the figure, the curve 1 reaches the peak value, and the curve 2 does not reach the peak value; at frequencies above 10kHz, curve 1 rises and curve 2 decays. It can be seen from the figure that the sensitivity of the device of the present invention represented by curve 1 is significantly higher than that of the moving coil loudspeaker represented by curve 2 after 1.1kHz frequency, and according to the formula, the sensitivity of the device is 1 dB higher, and then the Sound Pressure Level (SPL, Sound Pressure Level) is 1 dB higher. Curves 1 and 2 in the figure the effect produced by the two sound emitting devices can differ by 20dB at a frequency of 2kHz, thus showing the great advantage of the present invention. In addition, the higher the frequency, the better the directivity, and the higher the frequency of 4.3k than the moving coil loudspeaker by 25dB, it can indicate that the frequency response characteristic of the sounding unit already has the characteristic of strong directivity. Therefore, as can be seen from fig. 9, the use of the horn unit shown in fig. 1 can make the point sound source radiation be transmitted in directivity according to the constraints of the frequency band, amplitude, radiation and reflection angle of the sound source; the modules can be arrayed, various acoustic devices with high sound effect deterrence and high sound pressure level of different requirements can be flexibly realized through the arrayed arrangement, and the purpose that the sound pressure level can be improved without limit by using the acoustic devices is achieved.

In order that those skilled in the art will better understand the invention, embodiments of the invention will now be described with reference to specific examples.

Firstly, a high-performance sounder is subjected to modularized transformation, a vibration part and an external horn are designed into a module whole which is a basic assembly, each module is an independent and usable device, and the device comprises a complete set of control circuit, an optimized modularized sounding unit (a small transformed unit which can be further used in array) and a specific array horn design which is required to be carried out outside.

If a higher sound pressure value effect is needed, the modules are installed and arranged in a combined mode, after planarization array assembly is simply carried out, the energy of each array module can be automatically accumulated on a uniform generating surface, the area of the generating surface has no upper limit in principle according to the sound production principle of a surface sound source, and as long as the space is enough, a large number of temporary array installation spaces can be formed, and the whole sound effect strength can be improved without limit.

Firstly, a unit integral module is formed, and the unit sounding module designs a vibration unit and a front horn, and comprises the following figures: in order to conveniently superpose in the later period, the upper correlation groups are superposed by X2, X3 or X4, and the matrix is formed after X3 is selected, so that the later modularization processing is facilitated. The X3 mode is that a plurality of continuous connection groups can be conveniently formed after the design of one group of 3 groups, and a module can be formed.

Fig. 10 is a schematic structural diagram of a cascade sound generating device according to an embodiment of the present invention. As shown in fig. 10, a single device is an independent device, and a plurality of devices can be connected to form an array, so that the array can be flexibly formed, and the deterrent index and effect can be greatly improved by selecting the connection mode of the array after the devices are arranged and installed.

In summary, in the horn unit, the horn array device and the sound generating device of the embodiments of the present invention, the high-performance acoustic performance device is decomposed into the single independent working module, and the minimum sound generating unit enables the point sound source radiation to be transmitted in a directional manner according to the constraints of the frequency band, amplitude, radiation and reflection angle of the sound source; the modules are arrayed, various acoustic devices with high sound effect deterrence and high sound pressure level of various different requirements can be flexibly realized through the array, and the sound pressure level can be improved without limit by using the acoustic devices.

It should also be noted that the exemplary embodiments mentioned in this patent describe some methods or systems based on a series of steps or devices. However, the present invention is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, may be performed in an order different from the order in the embodiments, or may be performed simultaneously.

Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments and/or in combination with or instead of the features of the other embodiments in the present invention.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made to the embodiment of the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A horn unit, comprising: the acoustic wave superposition delivery pipe and the at least one pair of acoustic wave leading-in pipes; each pair of sound wave leading-in pipes comprises a first sound wave leading-in pipe and a second sound wave leading-in pipe; the first sound wave leading-in pipe, the second sound wave leading-in pipe and the sound wave superposition leading-out pipe respectively comprise a first trapezoidal side face and a second trapezoidal side face which are arranged in parallel, and a first square side face and a second square side face which are arranged oppositely, and the cross sections of the first trapezoidal side face and the second trapezoidal side face are squares which become larger gradually along the sound wave conduction direction;

2. The horn unit of claim 1, wherein the included angle of the V-shaped grooves is in the range of 15 degrees to 20 degrees.

3. The horn unit of claim 1, wherein the acoustic stack delivery tube has a depth of between one and two times a wavelength of the incoming acoustic signal.

4. The horn unit according to claim 1, wherein the V-shaped grooves corresponding to each pair of the sound wave introducing pipes have the same included angle, and the included angle between the waist extensions of the first trapezoidal side surface and the included angle between the waist extensions of the second trapezoidal side surface of the sound wave superposition and exit pipe are equal to the included angle of the V-shaped grooves corresponding to the sound wave introducing pipes.

5. The horn unit according to claim 4, wherein the first sonic ingress pipe and the second sonic ingress pipe of each pair of sonic ingress pipes are symmetrically disposed, the specifications of the respective pairs of sonic ingress pipes are the same, and the respective pairs of sonic ingress pipes are arranged in the extending direction of the V-shaped grooves thereof.

6. The horn unit according to claim 5, wherein the sum of the lengths of the bottom sides of the second trapezoidal side surfaces of the first sound introduction tubes of each pair of sound introduction tubes adjacent to the second square side surfaces of the sound superposition delivery tube is equal to the length of the corresponding side of the second square side surfaces of the sound superposition delivery tube.

7. The horn unit of claim 1, wherein the larger cross-sectional end of the acoustic wave superposition delivery tube is extended outward by both the first and second square sides thereof and forms a square sound outlet in combination with the mating extensions of the first and second trapezoidal sides thereof.

8. The horn unit of claim 1, wherein at least one side of the square sound outlet of the sound wave superposition delivery tube extends perpendicularly outward to form a rim portion, and the rim portion is used for fixing the horn unit to an external device.

9. A horn array apparatus comprising: a plurality of horn units as defined in any one of claims 1 to 8; the square sound outlets of the sound wave superposition delivery pipes in each horn unit are arranged in the same direction and flush with each other.

10. A sound generating device, comprising: the horn unit, the vibration unit, and the control unit of any one of claims 1 to 8; each first circular sound-emitting port and each second circular sound-emitting port of the horn unit are respectively provided with a vibration unit; the control unit is used for inputting synchronous control signals to all the vibration units so that all the vibration units generate the same sound wave signals.

11. The sound generating apparatus of claim 10, wherein the vibration unit comprises a phase plug, a horn, a piezoceramic diaphragm, a sound membrane, and a resonant sound cavity;

12. The sound generating apparatus of claim 11, wherein the piezoceramic diaphragm comprises: the piezoelectric ceramic diaphragm comprises a circular metal sheet and a circular piezoelectric ceramic diaphragm adhered to one side surface of the metal sheet;

13. The sound generating apparatus of claim 11, wherein the phase plug comprises: the included angle of the planes of two adjacent ribs ranges from 12 degrees to 18 degrees; the taper of the first cone ranges from 10 degrees to 16 degrees.