CN107295445B - Sounding device - Google Patents
Sounding device Download PDFInfo
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- CN107295445B CN107295445B CN201610195590.7A CN201610195590A CN107295445B CN 107295445 B CN107295445 B CN 107295445B CN 201610195590 A CN201610195590 A CN 201610195590A CN 107295445 B CN107295445 B CN 107295445B
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- 230000005540 biological transmission Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000011514 reflex Effects 0.000 description 2
- 239000011358 absorbing material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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- 239000002245 particle Substances 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2400/00—Loudspeakers
- H04R2400/11—Aspects regarding the frame of loudspeaker transducers
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
Abstract
The application provides a sound generating device, comprising: the loudspeaker comprises an outer shell, an inner shell and a loudspeaker, wherein the inner shell is arranged in the outer shell, and a gap is reserved between the outer surface of the inner shell and the inner surface of the outer shell; the inner shell is provided with a first hole and a second hole which are opposite in position, the loudspeaker is fixed in the inner shell, and the front surface of the loudspeaker faces to the first hole of the inner shell; the back of the loudspeaker faces to the second hole of the inner shell; the sound outlet groove is formed in the preset position of the outer shell body, so that forward sound waves of the loudspeaker penetrate through the first hole to enter the gap, backward sound waves of the loudspeaker penetrate through the second hole to enter the gap, and the forward sound waves of the loudspeaker and the backward sound waves of the loudspeaker are converged at the sound outlet groove through the gap. The back sound wave of the loudspeaker is effectively utilized, and sound energy of the loudspeaker is enhanced after the back sound wave is converged with the forward sound wave along the set channel, so that acoustic performance of the loudspeaker is improved, sound energy and sound efficiency of the loudspeaker are improved, and the loudspeaker has great practical value.
Description
Technical Field
The application relates to the technical field of acoustics, in particular to a sound generating device.
Background
The traditional sound generating device, such as a loudspeaker, is a sound generating device with very low sound generating efficiency, the sound generating efficiency can be improved by arranging the sound generating device in a sound box, and the theoretical basis of the traditional sound box design is an Infinite Baffle (Infinite Baffle) theory, namely, an Infinite Baffle is arranged between the forward sound wave and the backward sound wave of a loudspeaker diaphragm, so that the forward sound wave and the backward sound wave are blocked to avoid mutual offset in the air; however, the infinite baffle is difficult to be made infinitely large, so that the infinite baffle is folded back to the sound wave direction of the loudspeaker to form a closed space, the sound wave of the loudspeaker is blocked, and the energy of the forward sound wave of the loudspeaker is completely released, so that the structure of the modern sound box is obtained.
Because the structural design of the modern sound box is based on the infinite baffle theory, the theoretical basis is to restrain the back sound wave of the loudspeaker, namely, the energy of the back sound wave of the loudspeaker is shielded by the closed sound box, so that the loss of the back sound energy of the loudspeaker is caused; the front surface of the loudspeaker is directly exposed or positioned on the surface of the sound box, so that the energy of the forward sound wave of the loudspeaker is spread in a divergent manner; the sound box structures directly influence the sound production energy of the modern sound box, so that the sound production efficiency is reduced.
Disclosure of Invention
The application provides a sound generating device, which has a special structure and can effectively utilize the back sound wave emitted by a loudspeaker, so that after the back sound wave is converged with the forward sound wave along a specific channel, the sound generating energy and efficiency of the loudspeaker are enhanced, and the acoustic performance of the loudspeaker is improved.
The application provides a sound generating device, comprising: the loudspeaker comprises an outer shell, an inner shell and a loudspeaker, wherein the inner shell is arranged in the outer shell, and a gap is reserved between the inner shell and the outer shell;
the inner shell is provided with a first hole and a second hole which are opposite in position, the loudspeaker is fixed in the inner shell, and the front surface of the loudspeaker faces the first hole of the inner shell; the back surface of the loudspeaker faces the second hole of the inner shell;
and a sound outlet groove is formed in a preset position on the shell body, so that forward sound waves of the loudspeaker penetrate through the first hole and enter the gap, backward sound waves of the loudspeaker penetrate through the second hole and enter the gap, and the forward sound waves of the loudspeaker and the backward sound waves of the loudspeaker are converged at the sound outlet groove.
Optionally, a guide piece protruding towards the outer shell is arranged in the sound outlet groove, a first end of the guide piece is connected with the inner shell, and a second end of the guide piece extends to the outside of the sound outlet groove; so that the forward sound wave of the loudspeaker passes out of the space between the first edge of the sound outlet groove and the guide plate, the backward sound wave of the loudspeaker passes out of the space between the second edge of the sound outlet groove and the guide plate, and the forward sound wave and the backward sound wave are converged in the air outside the second end of the guide plate.
Optionally, the sound outlet groove is an annular sound outlet groove formed by encircling the outer shell body by 360 degrees.
Optionally, the guide piece is disposed right in between the first edge of the sound outlet groove and the second edge of the sound outlet groove, so that a space between the first edge of the sound outlet groove and the guide piece is equal to a space between the second edge of the sound outlet groove and the guide piece.
Optionally, the inner housing is the same shape as the outer housing.
Optionally, the inner housing and the outer housing are each at least one of the following shapes: sphere, ellipsoid, polyhedron, and the geometric center of the inner shell overlaps the geometric center of the outer shell.
Optionally, the speaker is fixed inside the inner case, and a geometric center of a diaphragm of the speaker overlaps with a geometric center of the inner case.
Optionally, the inner shell and the outer shell are polyhedrons, and the sound generating device further includes: the guide blocks are arranged at the corners of the inner surface of the inner shell and/or the corners of the inner surface of the outer shell, and the shapes of the guide blocks are matched with the corners of the inner surface of the inner shell and/or the corners of the inner surface of the outer shell, and are provided with concave cambered surfaces.
Optionally, the first hole and the second hole are the same in shape and size.
Optionally, the method further comprises: the sound splitting cones are of cone structures, the number of the sound splitting cones is two, the two sound splitting cones are fixed on the inner surface of the outer shell, the cone tip of one sound splitting cone is opposite to the geometric center of the first hole, and the cone tip of the other sound splitting cone is opposite to the geometric center of the second hole.
According to the sound generating device, the loudspeaker is arranged in the inner shell of the sound generating device with the inner shell structure, so that forward sound waves and backward sound waves of the loudspeaker can be completely wrapped in the sound generating device, and all sound energy of the loudspeaker is reserved as far as possible; the first hole and the second hole which are opposite in position are formed in the inner shell, so that forward sound waves and backward sound waves of the loudspeaker are respectively led into a gap between the inner shell and the outer shell, and the forward sound waves and the backward sound waves are converged and pass through from a sound outlet groove formed in the outer shell, so that smooth propagation channels are provided for the forward sound waves and the backward sound waves, all sound wave energy of the loudspeaker is converged and perfectly released, the infinite baffle of a traditional sound production device (such as a sound box) is completely subverted through the structural design, namely, the design concept of blocking the backward sound waves of the loudspeaker is realized, the sound production energy of the loudspeaker is enhanced after the forward sound waves and the forward sound waves are converged along a set channel, the acoustic performance of the loudspeaker is improved, the sound production energy and sound efficiency of the loudspeaker are improved, and the loudspeaker has great practical value.
Drawings
Fig. 1 is a schematic structural diagram of a sound generating device according to a first embodiment of the present application;
fig. 2 is a schematic structural diagram of a sound generating device according to a second embodiment of the present application;
fig. 3 is a schematic diagram of a sound generating device according to a third embodiment of the present application;
fig. 4 is a schematic diagram of a sound generating device according to a third embodiment of the present application, in which the shape of the inner and outer shells is different;
FIG. 5 is a schematic diagram of a sound-separating board structure of a sound-producing device according to a third embodiment of the present application;
reference numerals illustrate:
the outer shell 1, the guide piece 11, the first end 111 of the guide piece, the second end 112 of the guide piece, the sound outlet groove 12, the first edge 121 of the sound outlet groove, the second edge 122 of the sound outlet groove, the inner shell 2, the gap 21, the first hole 22, the second hole 23, the loudspeaker 3, the front 31 of the loudspeaker, the back 32 of the loudspeaker, the guide block 4, the cone 5, the cone tip 51, the cone side 52, the baffle 6, the rib 61 and the structural center 62.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the embodiments of the present application. In the drawings or the specification, like or similar elements are denoted by the same reference numerals.
Fig. 1 is a schematic structural diagram of a sound generating device according to an embodiment of the present application. As shown in fig. 1, the present application provides a sound generating apparatus, including: the loudspeaker comprises an outer shell 1, an inner shell 2 and a loudspeaker 3, wherein the inner shell 2 is arranged in the outer shell 1, and a gap 21 is formed between the inner shell 2 and the outer shell 1; the inner shell 2 is provided with a first hole 22 and a second hole 23 which are opposite in position, the loudspeaker 3 is fixed in the inner shell 2, and the front 31 of the loudspeaker faces the first hole 22 of the inner shell 2; the back 32 of the speaker faces the second hole 23 of the inner housing 2;
the sound outlet groove 12 is formed in a preset position on the outer shell 1, so that forward sound waves of the loudspeaker 3 pass through the first hole 22 and enter the gap 21, backward sound waves of the loudspeaker 3 pass through the second hole 23 and enter the gap 21, and the forward sound waves of the loudspeaker 3 and the backward sound waves of the loudspeaker 3 are converged at the sound outlet groove 12.
It should be noted that the sound generating device of the present application may be applied to any sound generating device having the structure described in the present application, for example, an independent sound box, a sound generating device (sound box or speaker) integrated in a terminal, and an earphone, and the following embodiments are all illustrated by the structure of the sound box.
Specifically, the loudspeaker diaphragm emits sound waves in the forward direction and the backward direction respectively when vibrating, and the two-way sound waves are opposite in phase. The phase is opposite to any moment of vibration displacement of the diaphragm, and the waveforms of the bidirectional sound waves exactly cancel each other, so that the bidirectional sound waves of the diaphragm are short-circuited in the air. The sound of a bare speaker tends to collapse, become wary, and narrow, which is a specific embodiment of the sound "short circuit". The sound box is produced, the essence of the sound box is to exert the efficiency of the loudspeaker, the design principle is based on the theory of an infinite baffle, namely, the forward sound wave and the backward sound wave of the loudspeaker diaphragm are isolated from each other, and the theoretical model is to place an infinite baffle between the forward sound wave and the backward sound wave of the loudspeaker diaphragm, and the forward sound wave is utilized to isolate the backward sound wave. However, the infinite baffle is not practical, so that the infinite baffle is folded back to the sound wave direction of the loudspeaker to form a closed space, which is the theoretical basis of modern sound box design.
Modern sound boxes are divided into three types, namely a closed box type, a bass reflex type and a transmission line type; the closed box completely isolates the propagation of the back sound wave of the loudspeaker through the closed space; the bass reflex (also called phase inversion) sound box uses the multiple reflection of the back sound wave of the loudspeaker on the inner wall of the box body to form oscillation wave, and uses the resonance effect of the phase inversion tube to strengthen the bass effect of the sound box. However, if the speaker is a full-frequency speaker, the back-facing sound wave should be a full-frequency sound wave, but the reverse-phase sound box is operated in such a way that the back-facing sound wave is suppressed, and the back-facing sound wave is converted into a resonance wave to be output, which only emphasizes the low-frequency sound wave; the transmission line type labyrinth sound box is characterized in that a tortuous channel with a continuously reduced caliber and filled with sound absorbing materials is arranged in the sound box, so that the energy of the loudspeaker facing away from sound waves is continuously weakened, and better low-frequency response is obtained. In any sound box design, the loudspeaker diaphragm is based on shielding the back sound energy of the loudspeaker or suppressing the back sound wave of the loudspeaker, so that the electroacoustic energy conversion efficiency of the loudspeaker is low. When the loudspeaker works, the vibrating diaphragm equally emits sound wave energy forwards and backwards, and according to the infinite baffle theory, forward sound waves are effective energy, backward sound waves are ineffective harmful energy, the forward sound waves can be utilized, and the backward sound waves must be restrained. It is theoretically inferred that the electroacoustic conversion efficiency of the speaker cannot exceed 50%. Practically speaking, it is rare that the electroacoustic conversion efficiency of a sound box can reach 30%. The direct manifestation of low electroacoustic conversion efficiency is poor frequency response and narrow frequency response range.
However, the application abandons the prior technical prejudice, and forms the reverse of the original sound wave as far as possible by the structural design of the loudspeaker back to form the forward sound wave, collects the original forward sound wave of the loudspeaker into the sound box, combines the two mutually-interacted sound waves into a whole, forms extremely fine full-frequency sound particles, and comprehensively surpasses the prior sound box design in terms of high-fidelity indexes such as sound reduction degree, sound field fidelity, and box-removing sense.
The specific structure of the sound generating device shown in fig. 1 is a double-layer shell structure of an outer shell 1 and an inner shell 2, the inner shell 2 is arranged in the outer shell 1, a gap 21 is reserved between the inner shell and the outer shell, the gap 21 is a propagation channel for reversing back sound waves of a loudspeaker 3 into forward sound waves, the forward sound waves of the loudspeaker 3 are wrapped in the outer shell 1 and propagated along the gap 21 until being converged with the reversed back sound waves, and the sound waves are emitted from a sound outlet groove 12 formed in the outer shell 1, wherein an arrow in fig. 1 shows a propagation path of the sound waves. It should be noted that, according to the sound wave superposition principle and the sound wave propagation theory, a person skilled in the art can calculate that the preset position of the outer shell 1 does not include the position where the forward sound wave and the backward sound wave are converged and superposed and then have opposite phases, that is, the waveforms of the bidirectional sound waves exactly cancel each other at any moment of vibration displacement of the diaphragm, thereby causing the phenomenon of short circuit of the bidirectional sound wave of the diaphragm in the air. The preset position is a preferable position point which can enhance the energy of the sound wave after the forward sound wave and the backward sound wave are overlapped. Preferably, for example, if the speaker 3 is disposed at the geometric center of the outer housing 1, the sound outlet slot 12 is formed at the position of 2:8 or 3:7 of the outer surface of the outer housing 1, so as to obtain better sound quality. In addition, the inner housing 2 is provided with a first hole 22 and a second hole 23 which are opposite to each other, the loudspeaker 3 is fixed inside the inner housing 2, and the front 31 of the loudspeaker faces the first hole 22, so that most of the positive sound waves of the loudspeaker penetrate out of the first hole 22 and enter the gap 21 to propagate; the back surface 32 of the speaker faces the second hole 23, so that most of the back sound waves of the speaker pass out of the second hole 23 and enter the gap 21 to propagate; all forward and backward sound waves are wrapped in the gap 21 and finally converged at the sound outlet groove 12 formed on the outer shell 1 and released into the air. Therefore, the back sound waves of the loudspeaker are also utilized, the forward sound waves are completely reserved, all sound wave energy of the loudspeaker is released together, the sound energy of the loudspeaker 3 is enhanced, and the sound quality effect is improved.
According to the sound generating device, the loudspeaker is arranged in the inner shell of the sound generating device with the inner shell structure, so that forward sound waves and backward sound waves of the loudspeaker can be completely wrapped in the sound generating device, and all sound energy of the loudspeaker is reserved as much as possible; the structure design completely overturns the infinite baffle of the traditional sound generating device (such as a sound box), namely the design concept of blocking the back sound wave of the loudspeaker, effectively utilizes the back sound wave of the loudspeaker, and strengthens the sound generating energy of the loudspeaker after converging the back sound wave of the loudspeaker along the set channel and the forward sound wave, thereby improving the acoustic performance of the loudspeaker, improving the sound generating energy and sound efficiency of the loudspeaker and having great practical value.
Fig. 2 is a schematic structural diagram of a sound generating device according to a second embodiment of the present application. As shown in fig. 2, on the basis of the above embodiment, a guide piece 11 protruding toward the outer casing 1 is provided in the sound outlet groove 12, and a first end 111 of the guide piece is connected to the inner casing 2, and a second end 112 of the guide piece extends to the outside of the sound outlet groove 12; so that the forward sound wave of the loudspeaker 3 passes out of the space between the first edge 121 of the sound outlet slot and the guide piece 11, the backward sound wave of the loudspeaker 3 passes out of the space between the second edge 122 of the sound outlet slot and the guide piece 11, and the forward sound wave and the backward sound wave merge in the air outside the second end 112 of the guide piece.
Further, the sound outlet groove 12 is an annular sound outlet groove which is formed by encircling the outer shell 1 by 360 degrees.
Further, the guide piece 11 is disposed at the middle between the first edge 121 of the sound outlet groove and the second edge 122 of the sound outlet groove, so that the space between the first edge 121 of the sound outlet groove and the guide piece 11 is equal to the space between the second edge 122 of the sound outlet groove and the guide piece 11.
Specifically, the sound outlet groove 12 is formed as an annular sound outlet groove surrounding the outer casing 1 and having an opening of 360 degrees, so that forward sound waves and backward sound waves propagating in the annular gap 21 of 360 degrees can completely penetrate out of the annular sound outlet groove 12, and the uniformity of sound wave propagation is ensured. Through the arrangement of the guide plate 11, the forward sound wave of the loudspeaker 3 can completely penetrate out of the space surrounded by the guide plate 11 and the first edge 121 of the sound outlet groove, and meanwhile, the backward sound wave of the loudspeaker 3 can completely penetrate out of the space surrounded by the guide plate 11 and the second edge 122 of the sound outlet groove, so that the forward sound wave and the backward sound wave can be ensured to be complete, penetrate out of the respective propagation channels without mutual interference, and finally meet in the air above the guide plate 11, namely outside the second end 112 of the guide plate. Further, by disposing the guide piece 11 at the middle between the first edge 121 of the sound outlet groove and the second edge 122 of the sound outlet groove, the forward sound wave and the backward sound wave can uniformly pass through the notches of the equally divided sound outlet groove 12 with the same size. Therefore, the sound quality effect of the forward sound wave and the backward sound wave after being converged is improved, and the total sound emission energy and the sound emission efficiency of the loudspeaker are further improved and restored.
Fig. 3 is a schematic diagram of a sound generating device according to a third embodiment of the present application. As shown in fig. 3, the present application provides a sound generating apparatus, and further, the inner housing 2 has the same shape as the outer housing 1 on the basis of the first embodiment. Further, the inner housing 2 and the outer housing 1 are both spheres, or ellipsoids, or polyhedrons, and the geometric center of the inner housing 2 overlaps the geometric center of the outer housing 1. As shown in fig. 3, the inner casing 2 and the outer casing 1 are both polyhedrons, i.e. the inner casing and the outer casing are of a square structure; alternatively, as shown in fig. 2, the inner case 2 and the outer case 1 are both spheres, and the centers of the spheres of the inner case 2 and the outer case 1 overlap.
Specifically, if the shapes of the inner and outer shells are the same, the geometric centers of the inner and outer shells are overlapped, so that the gap 21 between the inner and outer shells is uniform, and the forward sound wave and the backward sound wave of the loudspeaker maintain 360-degree uniform sound energy in the uniform gap 21, so that the forward sound wave and the backward sound wave penetrating from the first hole 22 and the second hole 23 are uniform in volume sound effect and full in sound quality. On the basis, the inner and outer shells can have various shapes, and besides the cube structure shown in fig. 3 and the sphere structure shown in fig. 2, the inner and outer shells can also be cylinders, hexagonal prisms, cubes, triangular prisms and the like; in addition, the inner shell and the outer shell can also be formed by geometric bodies with different shapes,
as shown in fig. 4, fig. 4 is a schematic diagram of a sound generating device provided in a third embodiment of the present application, in which the sound generating device has different shapes of inner and outer shells, fig. 4 is a cross-sectional view of a speaker of the sound generating device, and it can be seen that an inner shell 2 of the sound generating device is a cylinder, and an outer shell 1 is a triangular prism. In addition, the sound emitting grooves 12 may be annular grooves formed around the outer casing 1 by 360 degrees, or may be formed by a plurality of sound emitting grooves 12 formed on the outer casing 1 at equal intervals, and the structure and number of the sound emitting grooves 12 may be determined by those skilled in the art, which is not limited by the present application.
Further, the placement position of the speaker 3 in the inner housing 2 may be preferably such that the speaker 3 is fixed in the inner housing 2 and the geometric center of the diaphragm of the speaker 3 overlaps with the geometric center of the inner housing 2. In this way, the forward sound wave emitted from the speaker 3 and the backward sound wave travel at a substantially similar rate, distance, path, etc. within the inner casing, so as to ensure as much as possible the equalization of sound quality.
Further, for the sound generating apparatus in which the inner casing 2 and the outer casing 1 are both polyhedral, the guide blocks 4 may be further disposed at respective corners of the inner surface of the inner casing 2 and/or at respective corners of the inner surface of the outer casing, and the shape of the guide blocks 4 is matched with the respective corners of the inner surface of the inner casing and/or the respective corners of the inner surface of the outer casing, and have concave cambered surfaces. The guide block 4 can reduce the reflection and collision between the forward or backward sound wave and each corner of the inner surface of the inner and outer shells, so that the sound wave smoothly flows into the channel for sound wave propagation along the cambered surface of the guide block 4, the original waveform characteristic of the sound wave is maintained as much as possible, and the forward and backward sound waves meet at the sound outlet groove 12 of the outer shell 1 in the form closest to the original state.
Further, the first hole 22 and the second hole 23 are the same in shape and size. So as to ensure the equality of the propagation channels of the forward sound wave and the backward sound wave as much as possible and improve the pronunciation quality.
Further, the sound generating apparatus further includes: the two sound splitting cones 5 are fixed on the inner surface of the outer shell, the cone tip 51 of one sound splitting cone 5 is opposite to the geometric center of the first hole 22, and the cone tip 51 of the other sound splitting cone 5 is opposite to the geometric center of the second hole 23. The sound splitting cone 5 can reduce direct collision between the forward and backward sound waves contacted with the sound splitting cone and the inner surface of the outer shell, and reduce vertical reflection probability, so that interference on the original sound wave is reduced, the forward and backward sound waves can smoothly flow into a gap 21 channel between the inner shell and the outer shell along the cone tip 51 of the sound splitting cone 5, original wave characteristics of the forward and backward sound waves are reserved to the greatest extent, and the forward and backward sound waves meet at the sound outlet groove 12 in a mode closest to the original state. In order to further reduce the reflection of sound waves in the inner and outer housing, prevent standing waves from occurring, while keeping the sound wave characteristics as intact as possible, the cone side 52 of the cone 5 may be designed as a concave side.
Fig. 5 is a schematic diagram of a sound-splitting board structure of a sound-generating device according to a third embodiment of the present application, as shown in fig. 5, where the sound-generating device may further include a sound-splitting board 6, and the sound-splitting board 6 has the same function as the sound-splitting cone 5, so that sound waves more smoothly enter the sound wave propagation gap 21. The sound splitter 6 is in a star-shaped convex rib 61 structure, two sound splitters 6 are arranged, the two sound splitters 6 are fixed on the inner surface of the outer shell, and the convex ribs 61 of the sound splitter 6 face the direction of the inner shell 2; the structural center 62 of one soundboard 6 is opposite the geometric center of the first aperture 22 and the structural center 62 of the other soundboard 6 is opposite the geometric center of the second aperture 23. In order to further reduce reflection of the sound wave, prevent standing waves from being generated while keeping sound wave characteristics as intact as possible, the ridge 61 of the baffle 6 may be designed as a concave structure.
Further, the sound generating apparatus further includes: a tuning layer (not shown); the tuning layer is attached to at least one of the following positions: an inner surface of the inner housing 2, an outer surface of the inner housing 2, an inner surface of the outer housing 1; the tuning layer is a multi-layer structure composed of at least one layer of tuning material, and the surface of the tuning layer can be provided with grooves. The shape of the groove can be designed into different structures by combining the acoustic characteristics of the loudspeaker box, and the tuning layer not only plays a role in absorbing sound, but also plays a role in adjusting back sound waves, namely, the original characteristics of the back sound waves are more accurately maintained through different proportions of absorbing sound and reflecting sound.
According to the sound generating device, the shape of the inner shell, the setting position of the loudspeaker and the like are further refined, and the original states of forward sound waves and backward sound waves are kept as much as possible by means of adding sound splitting cones, sound splitting plates, guide blocks and the like, so that the high-middle-low full-frequency sound effects of the loudspeaker after the forward sound waves and the backward sound waves meet can be released uniformly and without depression. The sound generating device of the embodiment greatly improves the acoustic performance of the loudspeaker, improves the sound generating energy and sound efficiency of the loudspeaker, and has great practical value.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.
Claims (10)
1. A sound emitting device, comprising: the loudspeaker comprises an outer shell, an inner shell and a loudspeaker, wherein the inner shell is arranged in the outer shell, and a gap is reserved between the inner shell and the outer shell;
the inner shell is provided with a first hole and a second hole which are opposite in position, the loudspeaker is fixed in the inner shell, and the front surface of the loudspeaker faces the first hole of the inner shell; the back surface of the loudspeaker faces the second hole of the inner shell;
a sound outlet groove is formed in a preset position on the shell body, so that forward sound waves of the loudspeaker penetrate through the first hole and enter the gap, backward sound waves of the loudspeaker penetrate through the second hole and enter the gap, and the forward sound waves of the loudspeaker and the backward sound waves of the loudspeaker are converged at the sound outlet groove; the position of the first hole is not opposite to the position of the sound outlet groove; the preset position is a preferable position point which can enhance the sound wave energy after the forward sound wave and the backward sound wave are overlapped.
2. The sound generating apparatus according to claim 1, wherein a guide piece protruding toward the outer housing is provided in the sound outlet groove, a first end of the guide piece is connected to the inner housing, and a second end of the guide piece extends to the outside of the sound outlet groove; so that the forward sound wave of the loudspeaker passes out of the space between the first edge of the sound outlet groove and the guide plate, the backward sound wave of the loudspeaker passes out of the space between the second edge of the sound outlet groove and the guide plate, and the forward sound wave and the backward sound wave are converged in the air outside the second end of the guide plate.
3. The sound generating apparatus of claim 2, wherein the sound generating groove is an annular sound generating groove formed around the outer housing by 360 degrees.
4. The sound generating apparatus according to claim 3, wherein the guide piece is disposed in the middle between the first edge of the sound outlet groove and the second edge of the sound outlet groove so that a space between the first edge of the sound outlet groove and the guide piece is equal to a space between the second edge of the sound outlet groove and the guide piece.
5. The sound emitting apparatus of claim 1 wherein the inner housing is the same shape as the outer housing.
6. The sound emitting device of claim 5, wherein the inner housing and the outer housing are each at least one of the following shapes: sphere, ellipsoid, polyhedron, and the geometric center of the inner shell overlaps the geometric center of the outer shell.
7. The sound generating apparatus of claim 6, wherein the speaker is fixed inside the inner housing, and a geometric center of a diaphragm of the speaker overlaps with a geometric center of the inner housing.
8. The sound emitting apparatus of claim 6 wherein the inner housing and the outer housing are polyhedral, the sound emitting apparatus further comprising: the guide blocks are arranged at the corners of the inner surface of the inner shell and/or the corners of the inner surface of the outer shell, and the shapes of the guide blocks are matched with the corners of the inner surface of the inner shell and/or the corners of the inner surface of the outer shell, and are provided with concave cambered surfaces.
9. The sound emitting apparatus of any one of claims 1-8, wherein the first aperture is the same shape and size as the second aperture.
10. The sound emitting apparatus of any one of claims 1-8, further comprising: the sound splitting cones are of cone structures, the number of the sound splitting cones is two, the two sound splitting cones are fixed on the inner surface of the outer shell, the cone tip of one sound splitting cone is opposite to the geometric center of the first hole, and the cone tip of the other sound splitting cone is opposite to the geometric center of the second hole.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610195590.7A CN107295445B (en) | 2016-03-30 | 2016-03-30 | Sounding device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610195590.7A CN107295445B (en) | 2016-03-30 | 2016-03-30 | Sounding device |
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| Publication Number | Publication Date |
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| CN107295445A CN107295445A (en) | 2017-10-24 |
| CN107295445B true CN107295445B (en) | 2023-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610195590.7A Active CN107295445B (en) | 2016-03-30 | 2016-03-30 | Sounding device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5266752A (en) * | 1992-12-14 | 1993-11-30 | Cussans Rick C | Reflex folded horn speaker enclosure |
| CN103596103A (en) * | 2013-12-06 | 2014-02-19 | 裴维彩 | Double-vibrating-diaphragm loudspeaker box |
| CN104811873A (en) * | 2014-12-23 | 2015-07-29 | 北京太和开元科技有限公司 | Sound production device |
| CN104811848A (en) * | 2014-12-23 | 2015-07-29 | 北京太和开元科技有限公司 | Sound production device |
| CN205510399U (en) * | 2016-03-30 | 2016-08-24 | 北京太和开元科技有限公司 | Sounding device |
-
2016
- 2016-03-30 CN CN201610195590.7A patent/CN107295445B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5266752A (en) * | 1992-12-14 | 1993-11-30 | Cussans Rick C | Reflex folded horn speaker enclosure |
| CN103596103A (en) * | 2013-12-06 | 2014-02-19 | 裴维彩 | Double-vibrating-diaphragm loudspeaker box |
| CN104811873A (en) * | 2014-12-23 | 2015-07-29 | 北京太和开元科技有限公司 | Sound production device |
| CN104811848A (en) * | 2014-12-23 | 2015-07-29 | 北京太和开元科技有限公司 | Sound production device |
| CN205510399U (en) * | 2016-03-30 | 2016-08-24 | 北京太和开元科技有限公司 | Sounding device |
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| CN107295445A (en) | 2017-10-24 |
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