CN115884035A - Loudspeaker assembly, parametric array, working method of parametric array and terminal equipment - Google Patents
Loudspeaker assembly, parametric array, working method of parametric array and terminal equipment Download PDFInfo
- Publication number
- CN115884035A CN115884035A CN202110920362.2A CN202110920362A CN115884035A CN 115884035 A CN115884035 A CN 115884035A CN 202110920362 A CN202110920362 A CN 202110920362A CN 115884035 A CN115884035 A CN 115884035A
- Authority
- CN
- China
- Prior art keywords
- acoustic
- parametric array
- transfer chamber
- sound wave
- helmholtz
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Circuit For Audible Band Transducer (AREA)
Abstract
The invention relates to a loudspeaker assembly, a parametric array, a working method of the parametric array and a terminal device, wherein the terminal device comprises the parametric array, the parametric array comprises a plurality of loudspeaker assemblies, and the loudspeaker assemblies comprise: a speaker unit comprising a transducer having an acoustic wave outlet; and the acoustic super-surface unit is close to the sound wave outlet, is matched with the sound wave outlet and is used for adjusting the phase of the sound wave emitted by the sound wave outlet to a preset phase. The terminal equipment can improve the sound pressure level of the parametric array acoustic signal.
Description
Technical Field
The invention relates to the technical field of sound field control, in particular to a loudspeaker assembly, a parametric array with the loudspeaker assembly, terminal equipment with the loudspeaker assembly and a working method of the parametric array.
Background
The parametric array is an acoustic emission device that acquires difference frequency waves using the nonlinear effect of acoustic wave propagation. The parametric array has very high directivity, and directional transmission of sound can be realized in more scenes by using the parametric array, so that the influence of the sound on people in non-specified direction positions is reduced or the confidentiality is improved.
The process of converting the primary wave energy of the parametric array into the difference frequency sound wave energy belongs to the secondary acoustic effect, the conversion efficiency is very low, and the sound pressure level of the converted audible sound signal is very low. In the related art, a large-sized transducer array is disposed on a speaker based on the energy superposition principle, so that the sound pressure level of an audible sound signal can be increased. However, the transducer in the related art cannot ensure that the outgoing sound phases of the sound wave outlets of the transducers are consistent, so that the actual sound-listening signal sound pressure level value of the parametric array is lower than the theoretical superposition value.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
To this end, embodiments of the present invention propose a speaker assembly capable of adjusting the phase of sound waves emitted by a transducer to a preset phase.
Embodiments of the present invention provide a parametric array capable of increasing the sound pressure level of an acoustic signal.
The embodiment of the invention provides a working method of a parametric array, which can improve the sound pressure level of an acoustic signal.
Embodiments of the present invention provide a terminal device capable of increasing a sound pressure level of a parametric array acoustic signal.
A speaker assembly according to an embodiment of the present invention includes:
a speaker unit comprising a transducer having an acoustic wave outlet; and
the acoustic super-surface unit is close to the sound wave outlet, the acoustic super-surface unit is matched with the sound wave outlet, and the acoustic super-surface unit is used for adjusting the phase of the sound wave emitted by the sound wave outlet to a preset phase.
The loudspeaker assembly provided by the embodiment of the invention can adjust the phase of sound waves emitted by the transducer to the preset phase.
In some embodiments, the transducer is an ultrasonic transducer.
The parametric array according to the embodiment of the present invention includes a plurality of speaker assemblies, which may be the speaker assemblies described in any of the above embodiments;
and the preset phases of the sound waves emitted by the plurality of loudspeaker assemblies after being adjusted are the same.
The parametric array disclosed by the embodiment of the disclosure has the advantages of high sound pressure level of the directional sound signal and the like.
In some embodiments, the acoustic super-surface unit of any one of the plurality of the speaker assemblies is one of a curl space acoustic super-surface unit and a helmholtz acoustic super-surface unit.
In some embodiments, the warped volume acoustic super-surface unit comprises:
a waveguide having a delivery chamber with first and second oppositely disposed walls;
a plurality of first rigid bars provided on the first wall surface at intervals along a length direction of the transfer chamber, each of the first rigid bars being spaced apart from the second wall surface; and
a plurality of second rigid bars provided on the second wall surface at intervals in a length direction of the transfer chamber, each of the second rigid bars being spaced apart from the first wall surface, wherein the plurality of first rigid bars and the plurality of second rigid bars are alternately provided in the length direction of the transfer chamber so as to partition the transfer chamber into the curling space.
In some embodiments, the acoustic super-surface unit is a helmholtz acoustic super-surface unit.
In some embodiments, the helmholtz acoustic super-surface unit comprises:
the device comprises a straight pipe, a conveying device and a control device, wherein the straight pipe is provided with a conveying chamber, and the cross section of the conveying chamber is rectangular or square; and
a Helmholtz resonator disposed within the transfer chamber, the Helmholtz resonator having a plurality of Helmholtz resonant cavities arrayed along a length of the transfer chamber, each Helmholtz resonant cavity in communication with the transfer chamber.
In some embodiments, the helmholtz resonator has four helmholtz resonator cavities.
In some embodiments, the helmholtz resonator is movably disposed in a height direction of the transfer chamber.
According to the working method of the parametric array of the embodiment of the present invention, the parametric array includes the parametric array of any one of the embodiments, and the working method includes the following steps:
the transducer of the speaker unit of each of a plurality of the speaker assemblies emits sound waves;
the acoustic super-surface unit of any one of the plurality of speaker assemblies adjusts the phase of the sound wave emitted by the transducer of the speaker unit of the any one of the plurality of speaker assemblies to the preset phase, so that the adjusted preset phases of the sound wave emitted by the plurality of speaker assemblies are the same.
The terminal device according to the embodiment of the present invention includes a parametric array, and the parametric array is the parametric array described in the above embodiment.
In some embodiments, the terminal device is a stereo, a tablet computer, or a mobile phone.
Drawings
Fig. 1 is a schematic diagram of a parametric array according to an exemplary embodiment of the present invention.
Fig. 2 is a schematic diagram of a speaker assembly according to an exemplary embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a warped volume acoustic super-surface unit, according to an exemplary embodiment of the present invention.
Fig. 4 is a schematic diagram of a structure of a helmholtz acoustic super-surface unit according to an exemplary embodiment of the present invention.
Fig. 5 is a schematic diagram of another helmholtz acoustic super-surface unit configuration shown in accordance with an exemplary embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are illustrative and intended to explain the present invention and should not be construed as limiting the present invention.
A speaker assembly 10 of an embodiment of the present invention is described below with reference to the drawings.
As shown in fig. 2, a speaker assembly 10 according to an embodiment of the present invention includes a speaker 1 unit and an acoustic super-surface unit 2.
The loudspeaker 1 unit comprises a transducer with an acoustic wave outlet (not shown in the figure). The acoustic super surface unit 2 is adjacent to the sound wave outlet, and the acoustic super surface unit 2 is matched with the sound wave outlet, so that the acoustic super surface unit 2 can adjust the phase of the sound wave emitted from the sound wave outlet to a preset phase.
The loudspeaker assembly 10 according to the embodiment of the invention can adjust the phase of the sound wave emitted from the sound wave outlet to the preset phase by using the acoustic super-surface unit 2 by arranging the acoustic super-surface unit 2, namely, can change the phase of the sound wave emitted from the original transducer.
Thus, the speaker assembly 10 of the embodiment of the present invention can adjust the phase of the sound wave emitted from the transducer to a preset phase.
It will be appreciated that the transducer may be an ultrasonic transducer.
Specifically, the transducer of the speaker assembly 10 according to the embodiment of the present invention is an ultrasonic transducer, the ultrasonic transducer can emit an ultrasonic high-frequency signal with a short wavelength, and the acoustic super-surface unit 2 is a sub-wavelength structure, that is, the thickness of the acoustic super-surface unit 2 is in the millimeter level, so that the speaker assembly 10 according to the embodiment of the present invention has the advantages of small size and compact structure.
Therefore, the speaker assembly 10 of the embodiment of the invention can be applied to small-sized equipment and has good applicability.
A parametric array 100 of an embodiment of the present invention is described below with reference to the drawings.
As shown in fig. 1 to 5, a parametric array 100 according to an embodiment of the present invention includes a plurality of speaker assemblies 10, each speaker assembly 10 may be the speaker assembly 10 of any of the above embodiments, and the plurality of speaker assemblies 10 are adjacently disposed in an up-down direction or a left-right direction. The sound waves emitted by the plurality of loudspeaker assemblies 10 in the parametric array 100 are adjusted by the acoustic super-surface unit 2 to have the same preset phase. That is, the acoustic super-surface unit 2 may adjust the phases of the sound waves emitted by the plurality of speaker assemblies 10 of the parametric array 100 to the same phase.
This makes it possible to superimpose a plurality of sound waves having the same phase, and to increase the vibration intensity of the sound waves, thereby improving the sound pressure level of the acoustic signal of the parametric array 100. Therefore, the parametric array 100 of the embodiment of the present disclosure has the advantages of high sound pressure level of the directional acoustic signal, and the like.
In some embodiments, the acoustic super-surface unit 2 of any one of the plurality of loudspeaker assemblies 10 of the parametric array 100 of embodiments of the present invention may be one of a curl space acoustic super-surface unit 21 and a helmholtz acoustic super-surface unit 22.
That is, the acoustic super-surface unit 2 of each of the plurality of speaker assemblies 10 of the parametric array 100 according to the embodiment of the present invention is a curl-space acoustic super-surface unit 21, or the acoustic super-surface unit 2 of each of the plurality of speaker assemblies 10 of the parametric array 100 according to the embodiment of the present invention is a helmholtz acoustic super-surface unit 22, or the acoustic super-surface unit 2 of a part of the plurality of speaker assemblies 10 of the parametric array 100 according to the embodiment of the present invention is a curl-space acoustic super-surface unit 21, and the acoustic super-surface unit 2 of the rest of the plurality of speaker assemblies 10 of the parametric array 100 according to the embodiment of the present invention is a helmholtz acoustic super-surface unit 22.
Accordingly, the parametric array 100 of the embodiment of the present invention can select either the warped-space acoustic super-surface cell 21 or the helmholtz acoustic super-surface cell 22 as the acoustic super-surface cell 2 according to the phase of the acoustic wave radiated from the speaker 1 unit of the speaker assembly 10.
It should be noted that the acoustic super-surface unit 2 may be a curved-space acoustic super-surface unit 21, a helmholtz acoustic super-surface unit 22, or another acoustic super-surface unit 2 capable of changing the phase of an acoustic wave.
In some embodiments, as shown in FIG. 3, the warped volume acoustic super-surface unit 21 comprises a waveguide 211, a plurality of first rigid rods 212, and a plurality of second rigid rods 213.
The waveguide 211 has a transfer chamber 200, and the transfer chamber 200 has a first wall 201 and a second wall 202, and the first wall 201 and the second wall 202 are disposed opposite to each other in a height direction (vertical direction in fig. 2) of the transfer chamber 200.
A plurality of first rigid rods 212 are provided on the first wall 201 at intervals along the length direction (front-to-back direction in fig. 2) of the transfer chamber 200, wherein each first rigid rod 212 is spaced apart from the second wall 202.
That is, a plurality of first rigid rods 212 are arranged in the front-rear direction, and two first rigid rods 212 adjacent in the front-rear direction are spaced apart by a certain distance, and each first rigid rod 212 is spaced apart from the second wall surface 202 by a certain distance in the up-down direction.
Specifically, each two adjacent first rigid rods 212 are spaced apart by the same distance in the front-rear direction, and each first rigid rod 212 is spaced apart from the second wall surface 202 by the same distance.
A plurality of second rigid bars 213 are provided on the second wall 202 at intervals along the length of the transfer chamber 200, each second rigid bar 213 being spaced from the first wall 201.
That is, the plurality of second rigid bars 213 are arranged in the front-rear direction, and two second rigid bars 213 adjacent in the front-rear direction are spaced apart by a certain distance, and each second rigid bar 213 is spaced apart from the first wall surface 201 by a certain distance in the up-down direction.
Specifically, the distance between every two adjacent second rigid rods 213 in the front-rear direction is equal, and the distance between each second rigid rod 213 and the first wall surface 201 is equal.
As shown in fig. 3, the plurality of first rigid bars 212 and the plurality of second rigid bars 213 are alternately disposed along the length direction of the transfer chamber 200, and thus can divide the transfer chamber 200 into the curling space 210.
It should be noted that the alternating arrangement means that one second rigid rod 213 is disposed between two adjacent first rigid rods 212, and one first rigid rod 212 is disposed between two adjacent second rigid rods 213.
Specifically, two adjacent first rigid rods 212 are spaced apart from one second rigid rod 213 therebetween by the same distance, and two adjacent second rigid rods 213 are spaced apart from one first rigid rod 212 therebetween by the same distance, thereby being capable of partitioning the transfer chamber 200 into the curling spaces 210.
According to the parametric array 100 of the embodiment of the present invention, the transmission chamber 200 of the waveguide 211 of the curved-space acoustic surface unit 21 is divided into the curved space 210, and when the acoustic wave is incident to the transmission chamber 200 of the waveguide 211 from front to back, the curved space 210 forces the acoustic wave to propagate along the zigzag path of the curved space 210, and the effective propagation path of the acoustic wave through the waveguide 211 is increased, so that the transmission phase of the acoustic wave is changed.
Therefore, the parametric array 100 according to the embodiment of the present invention can make the phases of the sound waves emitted from each sound wave outlet the same, so that the sound waves with the same phase can be superimposed, the vibration intensity of the sound waves can be increased, and the sound pressure level of the directional sound signal can be increased.
It is understood that when the heights or numbers of the first rigid rods 212 and the second rigid rods 213 are changed, the effective propagation path of the sound wave can be changed, and further, by increasing the heights or numbers of the first rigid rods 212 and the second rigid rods 213, the effective propagation path of the sound wave can be increased, so that the transmission phase of the sound wave can cover the whole period of the sound wave.
Accordingly, the speaker assembly 10 of the parametric array 100 of the embodiment of the present invention can adjust the phase of the sound wave to any phase within the entire period of the sound wave.
In some embodiments, as shown in fig. 4 and 5, the helmholtz acoustic super surface unit 22 includes a straight tube 221 and a helmholtz resonator 222.
The straight pipe 221 has the transfer chamber 200, the cross section of the transfer chamber 200 is rectangular or square, the transfer chamber 200 has a first wall surface 201 and a second wall surface 202, and the first wall surface 201 and the second wall surface 202 are disposed opposite to each other in the height direction of the transfer chamber 200 (the straight pipe 221).
A helmholtz resonator 222 is provided within the transfer chamber 200, the helmholtz resonator 222 having a plurality of helmholtz resonant cavities 220 aligned along the length of the transfer chamber 200, each helmholtz resonant cavity 220 communicating with the transfer chamber 200.
As shown in fig. 4, the helmholtz resonator 222 and the second wall 202 of the transfer chamber 200 define a plurality of helmholtz resonator cavities 220, the helmholtz resonator cavities 220 having neck openings 203, the neck openings 203 communicating the helmholtz resonator cavities 220 with the transfer chamber 200.
According to the parametric array 100 of the embodiment of the present invention, when the sound wave is incident into the transmission chamber 200 of the straight pipe 221 from front to back, the sound wave enters the helmholtz resonator 220 and generates resonance therein, and the effective propagation path of the sound wave through the straight pipe 221 is increased, so that the transmission phase of the sound wave can be changed.
Therefore, the parametric array 100 according to the embodiment of the present invention can make the phases of the sound waves emitted from each sound wave outlet of the speaker assembly 10 the same, so that the sound waves with the same phase can be superimposed, the vibration intensity of the sound waves can be increased, and the sound pressure level of the directional sound signal can be improved.
Preferably, the Helmholtz resonator 222 has four Helmholtz resonating cavities 220.
In some embodiments, as shown in FIG. 5, the Helmholtz resonator 222 is movably disposed along the height direction of the transfer chamber 200.
Specifically, a Helmholtz cavity 220 is formed within a Helmholtz resonator 222, and the Helmholtz cavity 220 has a neck 203 that communicates the Helmholtz cavity 220 with the transfer chamber 200. The plurality of helmholtz resonators 222 can move up and down, so that the distance between the lower surface of the helmholtz resonator 222 and the second wall surface 202 can be changed, and the effective propagation path of the sound wave through the straight pipe 221 can be further changed by adjusting the distance between the lower surface of the helmholtz resonator 222 and the second wall surface 202.
It is understood that increasing the distance between the lower surface of the mhz resonator and the second wall surface 202 can further increase the effective propagation path of the sound wave through the straight pipe 221, so that the transmission phase of the sound wave can cover the whole period of the sound wave.
Accordingly, the parametric array 100 of the embodiment of the present invention can adjust the phase of the acoustic wave to any phase within the entire period of the acoustic wave by adding the acoustic metasurface.
It is understood that the parametric array 100 of the embodiment of the present invention can be applied to scenes requiring directional audio, such as exhibition halls, exhibition clubs, etc., and only the introduction audio of the corresponding product is played near the exhibition product.
The operation of the parametric array of the embodiment of the present invention is described below.
According to the working method of the parametric array of the embodiment of the present invention, the parametric array includes the parametric array of any one of the embodiments, and the working method includes the following steps:
emitting sound waves by a transducer of a speaker unit of each of the plurality of speaker assemblies;
the acoustic super-surface unit of any one of the plurality of speaker assemblies adjusts the phase of the sound wave emitted by the transducer of the speaker unit of any one of the plurality of speaker assemblies to a preset phase, so that the adjusted preset phases of the sound wave emitted by the plurality of speaker assemblies are the same.
It can be understood that the working method of the parametric array in the embodiment of the present invention improves the problem that the outgoing phases of the acoustic waves of the transducers cannot be completely consistent due to the process, and the acoustic super surface added can adjust the acoustic waves emitted by the transducers to the preset phase by using the corresponding acoustic super surface units under the condition that the phases of the acoustic waves emitted by the transducers in the original factory are different, so that the phases of the acoustic waves emitted by each acoustic wave outlet are the same, thereby superposing the acoustic waves in the same phase, increasing the vibration intensity of the acoustic waves, and improving the sound pressure level of the directional acoustic signals of the parametric array.
That is, the effective propagation paths of the sound waves emitted by different transducers and having different phases in the corresponding acoustic super-surface units are different, so that the sound waves are in a preset phase after being emitted from the acoustic super-surface units.
Specifically, as shown in fig. 3, when the acoustic super-surface unit is the curl space acoustic super-surface unit 21, the heights or the numbers of the first rigid rod 212 and the second rigid rod 213 are changed, the effective propagation path of the sound wave in the curl space acoustic super-surface unit 21 is also changed, so that the sound wave can reach a preset phase after passing through the curl space acoustic super-surface unit 21, and the transmission phase of the sound wave can cover the whole period of the sound wave.
As shown in fig. 5, when the acoustic super-surface unit is the helmholtz acoustic super-surface unit 22, the helmholtz resonator 222 can move up and down, the distance between the lower surface of the helmholtz resonator 222 and the second wall 202 is changed, and the effective propagation path of the sound wave in the acoustic super-surface unit 22 in the curved space is also changed, so that the sound wave can reach a preset phase after passing through the acoustic super-surface unit 22 in the curved space, and the transmission phase of the sound wave can cover the whole period of the sound wave. According to the working method of the parametric array provided by the embodiment of the invention, the acoustic super-surface unit enables the phase of the sound wave emitted by each sound wave outlet to be the same by adjusting the phase of the sound wave emitted by the sound wave outlet, so that the sound waves with the same phase can be superposed, the vibration intensity of the sound wave is increased, and the sound pressure level of the directional sound signal of the parametric array can be improved.
Therefore, the working method of the parametric array provided by the embodiment of the invention can improve the sound pressure level of the directional sound signal of the parametric array.
The working method of the parametric array of the embodiment of the invention specifically comprises the following steps:
when the acoustic super-surface unit is a curved-space acoustic super-surface unit 21, for example, sound waves are incident into the waveguide 211 of the curved-space acoustic super-surface unit 21 from front to back or from back to front, the curved space 210 formed by separating the first rigid rod 212 and the second rigid rod 213 will force the sound waves to propagate along a zigzag path in the waveguide 211. Whereby the effective propagation path of the acoustic wave through the waveguide 211 is increased, thereby changing the transmission phase of the acoustic wave.
By increasing the length and/or number of the rigid rods (first rigid rod 212 and second rigid rod 213) the effective propagation path of the sound wave can be greatly increased (lengthened), thereby increasing the transmission phase of the sound wave to cover the change in the 2 pi interval, i.e. the transmission phase of the sound wave can be changed in the 2 pi interval. The sound waves emitted by the loudspeaker assemblies 10 can thus be adjusted to a predetermined phase so that the sound waves emitted by the loudspeaker assemblies 10 of the parametric array 100 are adjusted to have the same phase by the warped volume acoustic super-surface unit 21.
When the acoustic super-surface unit is the helmholtz acoustic super-surface unit 22, the distance between the helmholtz resonator 222 and the first wall surface 201 in the height direction of the straight pipe 221 can be increased while keeping the height of the straight pipe 221 of the helmholtz acoustic super-surface unit 22 unchanged, so that the transmission phase of the sound wave can be increased to cover the change of the 2 pi interval, that is, the transmission phase of the sound wave can be changed in the 2 pi interval. The sound waves emitted by the loudspeaker assemblies 10 can thus be adjusted to a predetermined phase so that the sound waves emitted by the multiple loudspeaker assemblies 10 of the parametric array 100 are adjusted to have the same phase by the helmholtz acoustic meta-surface unit 22.
The following describes a terminal device of an embodiment of the present invention.
A terminal device according to an embodiment of the present invention includes a parametric array 100, and the parametric array 100 is the parametric array 100 of the above-described embodiment.
The terminal equipment according to the embodiment of the invention can be a sound box, a tablet computer, a mobile phone and the like.
Since the parametric array 100 according to the embodiment of the present disclosure can transmit an acoustic wave to a specified direction, the terminal device including the parametric array 100 can also transmit an acoustic wave to a specified direction.
The terminal device according to the embodiment of the present disclosure may be used in a museum, an exhibition, or the like, in order to introduce an exhibit to a viewer who is located in a specific direction (e.g., in front) of the exhibit, thereby not affecting viewers who do not visit the exhibit.
The terminal equipment according to the embodiment of the disclosure can also be used in occasions such as parks, squares and gymnasiums so as to play sound to specific people, thereby avoiding affecting others.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (11)
1. A speaker assembly, comprising:
a speaker unit comprising a transducer having an acoustic wave outlet; and
the acoustic super-surface unit is close to the sound wave outlet, the acoustic super-surface unit is matched with the sound wave outlet, and the acoustic super-surface unit is used for adjusting the phase of the sound wave emitted by the sound wave outlet to a preset phase.
2. The speaker assembly of claim 1, wherein the transducer is an ultrasonic transducer.
3. A parametric array comprising a plurality of loudspeaker assemblies, wherein the loudspeaker assemblies are according to claim 1 or 2;
and the preset phases of the sound waves emitted by the plurality of loudspeaker assemblies after being adjusted are the same.
4. A parametric array as in claim 3, wherein the acoustic hypersurface cell of any one of the plurality of speaker assemblies is one of a curl space acoustic hypersurface cell and a helmholtz acoustic hypersurface cell.
5. A parametric array according to claim 3 or 4, wherein the warped volume acoustic super-surface unit comprises:
a waveguide having a transfer chamber with first and second walls disposed opposite each other along a length direction thereof;
a plurality of first rigid bars provided on the first wall surface at intervals along the length direction of the transfer chamber, each of the first rigid bars being spaced apart from the second wall surface; and
a plurality of second rigid bars provided on the second wall surface at intervals in a length direction of the transfer chamber, each of the second rigid bars being spaced apart from the first wall surface, wherein the plurality of first rigid bars and the plurality of second rigid bars are alternately provided in the length direction of the transfer chamber so as to partition the transfer chamber into the curling space.
6. A parametric array as in claim 3 or 4, wherein the Helmholtz acoustic super-surface unit comprises:
a straight tube having a transfer chamber with a rectangular or square cross-section; and
a Helmholtz resonator disposed within the transfer chamber, the Helmholtz resonator having a plurality of Helmholtz resonant cavities arrayed along a length direction of the transfer chamber, each Helmholtz resonant cavity in communication with the transfer chamber.
7. A parametric array as in claim 6, wherein the Helmholtz resonators have four Helmholtz resonator cavities.
8. A parametric array as in claim 6, wherein the Helmholtz resonators are movably disposed along a height direction of the transfer chamber.
9. A method of operating a parametric array comprising a parametric array as claimed in any of claims 3 to 8, comprising the steps of:
the transducer of the speaker unit of each of the plurality of the speaker assemblies emits sound waves;
the acoustic super-surface unit of any one of the plurality of speaker assemblies adjusts the phase of the sound wave emitted by the transducer of the speaker unit of the any one of the plurality of speaker assemblies to the preset phase so that the adjusted preset phases of the sound wave emitted by the plurality of speaker assemblies are the same.
10. A terminal device comprising a parametric array according to any of claims 3 to 8.
11. The terminal device according to claim 10, wherein the terminal device is a stereo, a tablet computer or a mobile phone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110920362.2A CN115884035A (en) | 2021-08-11 | 2021-08-11 | Loudspeaker assembly, parametric array, working method of parametric array and terminal equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110920362.2A CN115884035A (en) | 2021-08-11 | 2021-08-11 | Loudspeaker assembly, parametric array, working method of parametric array and terminal equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115884035A true CN115884035A (en) | 2023-03-31 |
Family
ID=85762168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110920362.2A Pending CN115884035A (en) | 2021-08-11 | 2021-08-11 | Loudspeaker assembly, parametric array, working method of parametric array and terminal equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115884035A (en) |
-
2021
- 2021-08-11 CN CN202110920362.2A patent/CN115884035A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7826622B2 (en) | Constant-beamwidth loudspeaker array | |
| US4923031A (en) | High output loudspeaker system | |
| JP5405598B2 (en) | Speaker | |
| US4969196A (en) | Speaker and horn array | |
| EP0489551B1 (en) | Loudspeaker system having multiple subchambers | |
| US6394223B1 (en) | Loudspeaker with differential energy distribution in vertical and horizontal planes | |
| US4168761A (en) | Symmetrical air friction enclosure for speakers | |
| US6393131B1 (en) | Loudspeaker | |
| WO1996021342A1 (en) | Multiple chamber loudspeaker system | |
| EP3133827A1 (en) | Loudspeaker | |
| US4553628A (en) | Speaker system | |
| US9503807B2 (en) | Acoustic horn arrangement | |
| WO1999023855A1 (en) | Large scale sound reproduction system having cross-cabinet horizontal array of horn elements | |
| EP2974363B1 (en) | Acoustic horn manifold | |
| US9215524B2 (en) | Acoustic horn manifold | |
| CA2066122A1 (en) | High efficiency low frequency speaker system | |
| EP4224885A1 (en) | Waveguide for a loudspeaker | |
| CN115884035A (en) | Loudspeaker assembly, parametric array, working method of parametric array and terminal equipment | |
| CN108966097B (en) | Cylindrical loudspeaker and sound box equipment | |
| US8627920B2 (en) | Folded horn enclosure with inter-channel reflex-porting | |
| EP3030355B1 (en) | System for producing sound waves | |
| CN111698620A (en) | Electronic equipment | |
| WO2002073435A9 (en) | Sound direction system | |
| US11317178B2 (en) | Low-frequency spiral waveguide speaker | |
| CN110089128B (en) | Multi-driver speaker with cross-coupled dual wavecolumns and method of outputting the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |