CN107509144A - A kind of nonreciprocal acoustic apparatus - Google Patents
A kind of nonreciprocal acoustic apparatus Download PDFInfo
- Publication number
- CN107509144A CN107509144A CN201710739304.3A CN201710739304A CN107509144A CN 107509144 A CN107509144 A CN 107509144A CN 201710739304 A CN201710739304 A CN 201710739304A CN 107509144 A CN107509144 A CN 107509144A
- Authority
- CN
- China
- Prior art keywords
- nonreciprocal
- rotor
- kernel
- acoustic apparatus
- cavity
- 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
- 230000001902 propagating effect Effects 0.000 claims abstract description 6
- 238000009827 uniform distribution Methods 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 12
- 238000010276 construction Methods 0.000 abstract description 4
- 238000004088 simulation Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Abstract
The invention discloses a kind of nonreciprocal acoustic apparatus, including housing, cavity is provided with housing, rotatable rotor kernel is installed in cavity, rotor kernel and motor connection, rotated by motor driven rotor kernel, inclined blade is evenly distributed with the rotor kernel, the three propagation mouths turned on cavity are provided with housing, waveguide is installed at mouth propagating.Sound wave is excited by a waveguide, when the rotating speed of rotor is adequate value, sound wave exports from a specific waveguide, sonic transmissions will not occur at other acoustical waveguides simultaneously, therefore, either nonreciprocal acoustic apparatus need not be realized in the case of higher input power or huge device not changing input waveform, with simple in construction, non-warping signal, efficient advantage, it can realize that sound is nonreciprocal and circle transmission in specific frequency.
Description
Technical field
The present invention relates to nonreciprocal acoustic apparatus, belong to field of acoustics.
Background technology
Traditional nonreciprocal or asymmetric acoustic apparatus is usually passive structure, has relatively low efficiency.
The content of the invention
Goal of the invention：In order to overcome the deficiencies in the prior art, the present invention provides a kind of nonreciprocal acoustic apparatus, tool
There is the advantages that simple in construction, non-warping signal, high efficiency.With legacy equipment to ripple, it is nonreciprocal and asymmetric to improve traditional sound
The efficiency of device.
Technical scheme：To achieve the above object, nonreciprocal acoustic apparatus of the invention, including housing, are provided with housing
Cavity, rotatable rotor kernel is installed in cavity, three propagation mouths turn on cavity is provided with housing, in propagation mouth
Place is provided with waveguide.
Preferably, the rotor kernel and motor connection, are rotated by motor driven rotor kernel.
Preferably, it is evenly distributed with inclined blade on the rotor kernel.
Preferably, the propagation mouth is uniform around the center circumferential of rotor kernel, the angle between three waveguides is 120 °.
Preferably, the section for stating cavity is circle, the profile of housing is regular hexagon.
Preferably, the width of the waveguide should be less than the half of working frequency corresponding wavelength.
Preferably, the width for propagating mouth is less than duct width.
Beneficial effect：The nonreciprocal acoustic apparatus of the present invention, simple in construction, non-warping signal, high efficiency can be specific
Frequency realizes that sound is nonreciprocal and circle transmission.
Brief description of the drawings
Fig. 1 is the structural representation of nonreciprocal acoustic apparatus.
Fig. 2 is motor speed when being 360r/min, and the sound of numerical simulation is nonreciprocal and the frequency range of circle transmission.
Fig. 3 is motor speed when being 360r/min, the sound-filed simulation of numerical simulation.
Embodiment
The present invention is further described below in conjunction with the accompanying drawings.
As shown in figure 1, the nonreciprocal acoustic apparatus of the present invention, including housing, cavity is provided with housing, is installed in cavity
There are rotatable rotor kernel, rotor kernel and motor connection, rotated by motor driven rotor kernel, on the rotor kernel
Inclined blade is evenly distributed with, the three propagation mouths turned on cavity are provided with housing, waveguide is installed at mouth propagating.
Sound wave is excited by a waveguide, and when the rotating speed of rotor is adequate value, sound wave exports from a specific waveguide, while other
Sonic transmissions will not occur at acoustical waveguide.Rotor has inclined blade, so as to possess the ability for driving air flow.Rotor by
Motor rotates, and can rotate clockwise or counterclockwise.
In the present invention, the propagation mouth is uniform around the center circumferential of rotor kernel, and the angle between three waveguides is
120°.The section of cavity is circle, and the profile of housing is regular hexagon.The width of the waveguide should be less than half-wavelength, so as to only
Can propagation plane ripple.The width for propagating mouth is less than duct width, and sound wave is entered in waveguide.
Fig. 2 is motor speed when being 360r/min (clockwise), and the sound of numerical simulation is nonreciprocal and the frequency of circle transmission
Scope, as shown in figure 1, sound wave is incident by port P1, figure it is seen that near 1950Hz, 100% acoustic wave energy by
Port P2 is spread out of, therefore, because the rotational symmetry of structure, sound wave incident P2 can be transmitted to P3 completely.By that analogy, most end form
Into P1-P2-P3-P1 circle transmission (such as motor rotate counterclockwise, circle transmission are changed into P1-P3-P2-P1).Any two end
Transmission between mouthful is nonreciprocal, then realizes nonreciprocal and circle transmission function.Simulated machine rotating speed in this figure
For 360r/min when, nonreciprocal efficiency of transmission reaches 100% in resonant frequency.Fig. 3 sound-filed simulation can be seen that P1 incidences
Sound wave all spread out of from P2, and Fig. 2 result coincide.The nonreciprocal acoustic apparatus of the present invention, have simple in construction, non-warping
Signal, efficient advantage, it can realize that sound is nonreciprocal and circle transmission in specific frequency.
Described above is only the preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (7)
- A kind of 1. nonreciprocal acoustic apparatus, it is characterised in that：Including housing, cavity is provided with housing, being provided with cavity can The rotor kernel of rotation, the three propagation mouths turned on cavity are provided with housing, waveguide is installed at mouth propagating.
- 2. nonreciprocal acoustic apparatus according to claim 1, it is characterised in that：The rotor kernel and motor connection, lead to Cross the rotation of motor driven rotor kernel.
- 3. nonreciprocal acoustic apparatus according to claim 1, it is characterised in that：It is evenly distributed with and inclines on the rotor kernel Oblique blade.
- 4. nonreciprocal acoustic apparatus according to claim 1, it is characterised in that：The propagation mouth is around the center of rotor kernel Circumference uniform distribution, the angle between three waveguides are 120 °.
- 5. nonreciprocal acoustic apparatus according to claim 1, it is characterised in that：The section of the cavity is circular, housing Profile be regular hexagon.
- 6. nonreciprocal acoustic apparatus according to claim 1, it is characterised in that：The width of the waveguide should be less than work frequency The half of rate corresponding wavelength.
- 7. nonreciprocal acoustic apparatus according to claim 1, it is characterised in that：It is wide that the width for propagating mouth is less than waveguide Degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710739304.3A CN107509144A (en) | 2017-08-25 | 2017-08-25 | A kind of nonreciprocal acoustic apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710739304.3A CN107509144A (en) | 2017-08-25 | 2017-08-25 | A kind of nonreciprocal acoustic apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107509144A true CN107509144A (en) | 2017-12-22 |
Family
ID=60692996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710739304.3A Pending CN107509144A (en) | 2017-08-25 | 2017-08-25 | A kind of nonreciprocal acoustic apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107509144A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114900772A (en) * | 2022-04-18 | 2022-08-12 | 华南师范大学 | Non-reciprocal acoustic device based on rotary Doppler effect |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005198342A (en) * | 1995-09-02 | 2005-07-21 | New Transducers Ltd | Loudspeaker |
| CN105659315A (en) * | 2013-08-21 | 2016-06-08 | 德克萨斯大学系统董事会 | Non-reciprocal acoustic devices based on linear or angular momentum biasing |
| CN106356051A (en) * | 2016-09-20 | 2017-01-25 | 南京大学 | Multipoint asymmetric sound propagation and loop propagation implementation device |
-
2017
- 2017-08-25 CN CN201710739304.3A patent/CN107509144A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005198342A (en) * | 1995-09-02 | 2005-07-21 | New Transducers Ltd | Loudspeaker |
| CN105659315A (en) * | 2013-08-21 | 2016-06-08 | 德克萨斯大学系统董事会 | Non-reciprocal acoustic devices based on linear or angular momentum biasing |
| CN106356051A (en) * | 2016-09-20 | 2017-01-25 | 南京大学 | Multipoint asymmetric sound propagation and loop propagation implementation device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114900772A (en) * | 2022-04-18 | 2022-08-12 | 华南师范大学 | Non-reciprocal acoustic device based on rotary Doppler effect |
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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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171222 |
|
| RJ01 | Rejection of invention patent application after publication |